2006 xB
ELECTRICAL WIRING DIAGRAM
Section Code
Page
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . A . . . .
2
HOW TO USE THIS MANUAL . . . . . . . . . . . . . . . B . . . .
3
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . C . . . .
12
ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . . . . D . . . .
17
GLOSSARY OF TERMS AND SYMBOLS . . . . . E . . . .
18
RELAY LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . F . . . .
20
ELECTRICAL WIRING ROUTING . . . . . . . . . . . G . . . .
28
SYSTEM CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . H . . . .
37
GROUND POINT . . . . . . . . . . . . . . . . . . . . . . . . . . . I . . . .
168
POWER SOURCE (Current Flow Chart) . . . . . J . . . .
172
CONNECTOR LIST . . . . . . . . . . . . . . . . . . . . . . . . K . . . .
178
PART NUMBER OF CONNECTORS . . . . . . . . . L . . . .
190
OVERALL ELECTRICAL WIRING DIAGRAM . M . . . .
194
1
SCION xB (EM0091U)
A INTRODUCTION
This manual consists of the following 13 sections:
No.
Section
Description
INDEX
Index of the contents of this manual.
INTRODUCTION
Brief explanation of each section.
B
HOW TO USE THIS
MANUAL
Instructions on how to use this manual.
C
TROUBLE–
SHOOTING
Describes the basic inspection procedures for electrical circuits.
D
ABBREVIATIONS
Defines the abbreviations used in this manual.
E
GLOSSARY OF
TERMS AND
SYMBOLS
Defines the symbols and functions of major parts.
F
RELAY LOCATIONS
Shows position of the Electronic Control Unit, Relays, Relay Block, etc.
This section is closely related to the system circuit.
G
ELECTRICAL
WIRING ROUTING
Describes position of Parts Connectors, Splice points, Ground points, etc.
This section is closely related to the system circuit.
INDEX
Index of the system circuits.
SYSTEM CIRCUITS
Electrical circuits of each system are shown from the power supply through ground
points. Wiring connections and their positions are shown and classified by code
according to the connection method. (Refer to the section, ”How to use this manual”).
The ”System Outline” and ”Service Hints” useful for troubleshooting are also contained
in this section.
I
GROUND POINT
Shows ground positions of all parts described in this manual.
J
POWER SOURCE
(Current Flow Chart)
Describes power distribution from the power supply to various electrical loads.
K
CONNECTOR LIST
Describes the form of the connectors for the parts appeared in this book.
This section is closely related to the system circuit.
L
PART NUMBER OF
CONNECTORS
Indicates the part number of the connectors used in this manual.
M
OVERALL
ELECTRICAL
WIRING DIAGRAM
Provides circuit diagrams showing the circuit connections.
A
H
2
SCION xB (EM0091U)
FOREWORD
This wiring diagram manual has been prepared to provide
information on the electrical system of the 2006 xB.
This manual applies to the models listed below. It covers all
information in the previously issued Pub. No. EM0090U, and
includes all production changes effective Dec. 2005 or later.
Applicable models: NCP31 Series
Refer to the following manuals for additional service
specifications and repair procedures for these models:
Manual Name
D 2006 SCION xB Repair Manual
D 2006 SCION New Car Features
Pub. No.
RM0091U
NM0060U
All information in this manual is based on the latest product
information at the time of publication. However, specifications
and procedures are subject to change without notice.
NOTICE
Always follow the directions given in the above repair manuals when handling
supplemental restraint system components (such as removal, installation,
inspection, etc.) in order to prevent accidents and supplemental restraint
system malfunction.
E2005
All rights reserved. This book may not be
reproduced or copied, in whole or in part, without
the written permission of Toyota Motor
Corporation.
First Printing : Nov. 28, 2005 01–051128–00
HOW TO USE THIS MANUAL B
This manual provides information on the electrical circuits installed on vehicles by
dividing them into a circuit for each system.
The actual wiring of each system circuit is shown from the point where the power
source is received from the battery as far as each ground point. (All circuit
diagrams are shown with the switches in the OFF position.)
When troubleshooting any problem, first understand the operation of the circuit
where the problem was detected (see System Circuit section), the power source
supplying power to that circuit (see Power Source section), and the ground points
(see Ground Point section). See the System Outline to understand the circuit
operation.
When the circuit operation is understood, begin troubleshooting of the problem
circuit to isolate the cause. Use Relay Location and Electrical Wiring Routing
sections to find each part, junction block and wiring harness connectors, wiring
harness and wiring harness connectors and ground points of each system circuit.
Internal wiring for each junction block is also provided for better understanding of
connection within a junction block.
Wiring related to each system is indicated in each system circuit by arrows
(from__, to__). When overall connections are required, see the Overall Electrical
Wiring Diagram at the end of this manual.
3
SCION xB (EM0091U)
B HOW TO USE THIS MANUAL
* The system shown here is an EXAMPLE ONLY. It is different to the actual
circuit shown in the SYSTEM CIRCUITS SECTION.
[A]
Stop Light
(BAT)
[N]
(IG)
15A
STOP
7.5A
GAUGE
2
[B]
3 IB
4 IB
L
(S/D)
W–R
R–L
1
7 3C
2
[G]
[C]
S6
Stop Light SW
15 3C
14 IE1
8
L4
Light Failure Sensor
4
11
1
(Shielded)
Stop
3
R6
Rear Combination
Light LH
R7
Rear Combination
Light RH
W–B
[J]
G–B
[I]
G–R
G–R
G–R
2
H17
High Mounted
Stop Light
[K]
1
6
W–B
W–B
1
BV1
W–B
W–B
W–B
3
BO
50
Rear
Lights
[F]
G–R
[H]
1
BV1
13
Y–G
L
G–W
(S/D)
G–W
2
Stop
[E]
[L]
BL
[M]
4
SCION xB (EM0091U)
C7
Combination Meter
4
15 IE1
7
4
R–L
L
(S/D)
R
G–W
Skid Control ECU
with Actuator
[D]
(W/G)
1
B
[A] : System Title
[H] : Indicates the wiring color.
Wire colors are indicated by an alphabetical code.
[B] : Indicates a Relay Block. No shading is used and
only the Relay Block No. is shown to distinguish it
from the J/B
Example:
Indicates Relay Block No.1
B
= Black
W = White
BR = Brown
L
= Blue
V
SB = Sky Blue
= Violet
R = Red
G = Green
LG = Light Green
[C] : (
) is used to indicate different wiring and
connector, etc. when the vehicle model, engine
type, or specification is different.
P
Y
GR = Gray
[D] : Indicates related system.
The first letter indicates the basic wire color and the
second letter indicates the color of the stripe.
= Pink
= Yellow
O = Orange
[E] : Indicates the wiring harness and wiring harness
connector. The wiring harness with male terminal is
shown with arrows (
).
Outside numerals are pin numbers.
Example:
L–Y
L
(Blue)
[I]
Female
Male (
)
Y
(Yellow)
: Indicates a wiring Splice Point
Example:
The first letter of the code for each wiring harness
and wiring harness connector(s) indicates the
component’s location, e.g, ”E” for the Engine
Compartment, ”I” for the Instrument Panel and
Surrounding area, and ”B” for the Body and
Surrounding area.
When more than one code has the first and second
letters in common, followed by numbers (e.g, IH1,
IH2), this indicates the same type of wiring harness
and wiring harness connector.
[F] : Represents a part (all parts are shown in sky blue).
The code is the same as the code used in parts
position.
[G] : Junction Block (The number in the circle is the J/B
No. and the connector code is shown beside it).
Junction Blocks are shaded to clearly separate
them from other parts.
[J] : Indicates a shielded cable.
[K] : Indicates the pin number of the connector.
The numbering system is different for female and
male connectors.
Example: Numbered in order
from upper left to
lower right
Numbered in order
from upper right to
lower left
Example:
3C indicates that
it is inside
Junction Block
No.3
Female
Male
[L] : Indicates a ground point.
The first letter of the code for each ground point(s)
indicates the component’s location, e.g, ”E” for the
Engine Compartment, ”I” for the Instrument Panel
and Surrounding area, and ”B” for the Body and
Surrounding area.
[M] : Page No.
[N] : Indicates the ignition key position(s) when the
power is supplied to the fuse(s).
5
SCION xB (EM0091U)
B HOW TO USE THIS MANUAL
[O]
System Outline
Current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW.
When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 8 of the light failure sensor, and also flows
through the rear lights warning light to TERMINAL 4 of the light failure sensor.
Stop Light Disconnection Warning
When the ignition SW is turned on and the brake pedal is pressed (Stop light SW on), if the stop light circuit is open, the current
flowing from TERMINAL 7 of the light failure sensor to TERMINALS 1, 2 changes, so the light failure sensor detects the
disconnection and the warning circuit of the light failure sensor is activated.
As a result, the current flows from TERMINAL 4 of the light failure sensor to TERMINAL 11 to GROUND and turns the rear lights
warning light on. By pressing the brake pedal, the current flowing to TERMINAL 8 of the light failure sensor keeps the warning
circuit on and holds the warning light on until the ignition SW is turned off.
[P]
: Parts Location
Code
See Page
Code
See Page
Code
See Page
C7
34
L4
36
R7
37
H17
36
R6
37
S6
35
[Q]
: Relay Blocks
Code
1
[R]
See Page
18
Relay Blocks (Relay Block Location)
R/B No.1 (Instrument Panel Brace LH)
: Junction Block and Wire Harness Connector
Code
See Page
Junction Block and Wire Harness (Connector Location)
3C
22
Instrument Panel Wire and J/B No.3 (Instrument Panel Brace LH)
IB
20
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
[S]
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IE1
42
Floor Wire and Instrument Panel Wire (Left Kick Panel)
BV1
50
Luggage Room Wire and Floor Wire (Luggage Room Left)
[T]
: Ground Points
Code
See Page
Ground Points Location
BL
50
Under the Left Center Pillar
BO
50
Back Panel Center
6
SCION xB (EM0091U)
B
[O] : Explains the system outline.
[P] : Indicates the reference page showing the position on the vehicle of the parts in the system circuit.
Example : Part ”L4” (Light Failure Sensor) is on page 36 of the manual.
∗ The letter in the code is from the first letter of the part, and the number indicates its order in parts
starting with that letter.
Example : L 4
Á
Á
Parts is 4th in order
Light Failure Sensor
[Q] : Indicates the reference page showing the position on the vehicle of Relay Block Connectors in the system circuit.
Example : Connector ”1” is described on page 18 of this manual and is installed on the left side of the instrument
panel.
[R] : Indicates the reference page showing the position on the vehicle of J/B and Wire Harness in the system circuit.
Example : Connector ”3C” connects the Instrument Panel Wire and J/B No.3. It is described on page 22 of this
manual, and is installed on the instrument panel left side.
[S] : Indicates the reference page describing the wiring harness and wiring harness connector (the female wiring
harness is shown first, followed by the male wiring harness).
Example : Connector ”IE1” connects the floor wire (female) and Instrument panel wire (male). It is described on
page 42 of this manual, and is installed on the left side kick panel.
[T] : Indicates the reference page showing the position of the ground points on the vehicle.
Example : Ground point ”BO” is described on page 50 of this manual and is installed on the back panel center.
7
SCION xB (EM0091U)
B HOW TO USE THIS MANUAL
The ground points circuit diagram shows the connections from all major parts to the respective ground points. When
troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify
the problem ground quickly. The relationship between ground points ( EA , IB and IC shown below) can also be
checked this way.
I GROUND POINT
W–B
W–B
FAN MAIN Relay
5
FAN MAIN Relay
5
A/C Control Assembly
W–B
5
A/C Relay No.3
5
W–B
A
W–B
A
W–B
Blower Motor
O/D Main SW
W–B
A/C Relay No.2
W–B
A
Cigarette Lighter
A W–B
W–B
Clock
Blower SW
A
W–B
W–B
A
Parking Brake SW
J1
Junction
Connector
W–B
Radiator Fan Motor
7
3B
W–B
Headlight Cleaner Relay
W–B
Combination Meter
W–B
W–B
Headlight LH
W–B
W–B
W–B
W–B
Front Fog Light LH
3
3F
13
3G
W–B
W–B
W–B
W–B
Front Turn Signal Light LH
Brake Fluid Level SW
W–B
W–B
5
3E
W–B
6
3E
Front Clearance Light LH
W–B
W–B
Door Lock Control SW
2
IA1
W–B
1
3D
W–B
W–B
Front Clearance Light RH
W–B
Front Fog Light RH
W–B
Front Turn Signal Light RH
W–B
Combination SW
7
3C
W–B
Headlight RH
Cruise Control ECU
Remote Control Mirror SW
Turn Signal Flasher
W–B
W–B
Defogger SW
W–B
Combination SW
W–B
W–B
W–B
W–B
Door Lock Motor RH
W–B
W–B
W–B
Door Courtesy SW RH
W–B
Unlock Warning SW
10 EA2
15 W–B
ID1
W–B
W–B
W–B
Door Lock Control Relay
W–B
Power Window Master SW
W–B
EA
W–B
Idle–Up SW
Door Courtesy SW LH
8 W–B
IB1
Door Lock Control SW
W–B
W–B
W–B
A/C Amplifier
W–B
W–B
W–B
W–B
W–B
W–B
Blower Resistor
Power Window Control
Relay
Door Lock Motor LH
W–B (4A–GZE)
4
Fuel Control SW
4
4
3
IC3
W–B
W–B
BR
Radio and Player
4
W–B
Woofer Speaker Amplifier
BR
W–B
BR
BR
BR
Combination Meter
4
BR
Fuel Sender
W–B
4
BR
5
BA1
W–B
BR
Auto Antenna Motor
Combination Meter
4
HEATER Relay
IB
*
IC
The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
8
SCION xB (EM0091U)
B
The ”Current Flow Chart” section, describes which parts each power source (fuses, fusible links, and circuit breakers)
transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each system
are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully
understood.
J POWER SOURCE (Current Flow Chart)
The chart below shows the route by which current flows from the battery to each electrical source
(Fusible Link, Circuit Breaker, Fues, etc.) and other parts
10A ECU–B
2
2
Short Pin
7.5A DOME
15A EFI
Battery
2
30A AM2
6
Fusible Link Block
10A HAZARD
2
20A RADIO NO.1
S2
Starter
10A HORN
6
100A ALT
5
60A ABS
Engine Room R/B (See Page 20)
20A
10A
Fuse
System
Page
STOP
ABS
ABS and Traction Control
Cruise Control
Electronically Controlled Transmission
Multiplex Communication System
194
187
180
166
210
DOME
Cigarette Lighter
Combination Meter
Headlight
Interior Light
Key Reminder and Seat Belt Warning
Light Auto Turn Off System
Theft Deterrent and Door Lock Control
214
230
112
122
Power Source
B
1
BA1
W
1.25B
FL MAIN
Battery
50A MAIN
B
2
1
7.5A DOME
2
2
W
7
EB1
W
W
1
1
2
R
1
7.5A AM1
2
1
2
2
W–R
6
EB1
W–R
W
B
15A HAZ–RADIO
2
W
8
4
AM2
2
AM1
1
ST2
IG2
ST1
IG1
ACC
I8
Ignition SW
2
20A DEFOG
B–Y
∗
1
1
2
1
W–R
The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
9
SCION xB (EM0091U)
B HOW TO USE THIS MANUAL
K CONNECTOR LIST
[A]
I14
I15
I16
Dark Gray
Gray
1 2 3 4
J1
[C]
1 2 3 4 5 6 7
1
2
3
4
5
6
7
8
[D]
[B]
J4
K1
Black
K2
L1
1 2
1 2
Dark Gray
A
A A
A A A A A
A B B
DD
A A B CC CDD
1
K CONNECTOR LIST
BA1
1 2 3
4 5
6 7 8 9 10 11 12 13
Black
BD2
[E]
1 2
3 4
5 6 7 8 9 10 11
5 4
3 2 1
13 12 11 10 9 8 7 6
Gray
[F]
4 3
2 1
11 10 9 8 7 6 5
[A] : Indicates connector to be connected to a part. (The numeral indicates the pin No.)
[B] : Junction Connector
Indicates a connector which is connected to a short terminal.
Junction Connector
Junction connector in this manual include a short terminal which is
connected to a number of wire harnesses. Always perform
inspection with the short terminal installed. (When installing the
wire harnesses, the harnesses can be connected to any position
within the short terminal grouping. Accordingly, in other vehicles,
the same position in the short terminal may be connected to a wire
harness from a different part.)
Wire harness sharing the same short terminal grouping have the
same color.
Same Color
Short Terminal
[C] : Parts Code
The first letter of the code is taken from the first letter of part, and the numbers indicates its order in parts which
start with the same letter.
[D] : Connector Color
Connectors not indicated are milky white in color.
[E] : Indicates the connector shapes which are used to join wire harnesses.
On Left : Female connector shapes
On Right : Male connector shapes
Numbers indicate pin numbers.
[F] : Indicates connector colors. (Connectors with not indicated colors are white)
10
SCION xB (EM0091U)
B
L PART NUMBER OF CONNECTORS
Part Name
Code
Part Number
Code
Part Name
Part Number
A1
A/C Ambient Temp. Sensor
90980–11070
D4
Diode (Courtesy)
90980–11608
A2
A/C Condenser Fan Motor
90980–11237
D5
Diode (Interior Light)
90980–10962
A3
A/C Condenser Fan Relay
90980–10940
D6
Diode (Moon Roof)
90980–11608
90980–10848
A4
A/C Condenser Fan Resistor
90980–10928
D7
Door Lock Control Relay
A5
A/C Magnetic Clutch
90980–11271
D8
Door Lock Control SW LH
A6
A/T Oil Temp. Sensor
90980–11413
D9
Door Lock Control SW RH
A7
[A]
ABS Actuator
[B]
90980–11151
[C]
D10
Door Courtesy SW LH
A8
ABS Actuator
90980–11009
D11
Door Courtesy SW RH
90980–11148
90980–11097
A9
ABS Speed Sensor Front LH
90980–10941
D12
Door Courtesy SW Front LH
A10
ABS Speed Sensor Front RH
90980–11002
D13
Door Courtesy SW Front RH
A11
Airbag Sensor Front LH
D14
Door Courtesy SW Rear LH
A12
Airbag Sensor Front RH
A13
Airbag Squib
90980–11156
90980–11856
D15
Door Courtesy SW Rear RH
90980–11194
D16
Door Key Lock and Unlock SW LH
90980–11070
D17
Door Key Lock and Unlock SW RH
90980–11170
[A] : Part Code
[B] : Part Name
[C] : Part Number
Toyota Part Number are indicated.
Not all of the above part numbers of the connector are established for the supply.
11
SCION xB (EM0091U)
C TROUBLESHOOTING
To Ignition SW
IG Terminal
(a) Establish conditions in which voltage is present at the check
point.
Example:
[A] – Ignition SW on
[B] – Ignition SW and SW 1 on
[C] – Ignition SW, SW 1 and Relay on (SW 2 off)
Fuse
[A]
SW 1
VOLTAGE CHECK
Voltmeter
[B]
(b) Using a voltmeter, connect the negative lead to a good ground
point or negative battery terminal, and the positive lead to the
connector or component terminal.
This check can be done with a test light instead of a voltmeter.
Relay
[C]
Solenoid
SW 2
CONTINUITY AND RESISTANCE CHECK
(a) Disconnect the battery terminal or wire so there is no voltage
between the check points.
Ohmmeter
(b) Contact the two leads of an ohmmeter to each of the check
points.
SW
If the circuit has diodes, reverse the two leads and check
again.
When contacting the negative lead to the diode positive side
and the positive lead to the negative side, there should be
continuity.
When contacting the two leads in reverse, there should be no
continuity.
Ohmmeter
Diode
Digital Type
Analog Type
(c) Use a volt/ohmmeter with high impedance (10 kΩ/V
minimum) for troubleshooting of the electrical circuit.
12
SCION xB (EM0091U)
C
FINDING A SHORT CIRCUIT
To Ignition SW
IG Terminal
(a) Remove the blown fuse and disconnect all loads of the fuse.
(b) Connect a test light in place of the fuse.
(c) Establish conditions in which the test light comes on.
Test Light
Fuse Case
Example:
[A] – Ignition SW on
[B] – Ignition SW and SW 1 on
[C] – Ignition SW, SW 1 and Relay on (Connect the
Relay) and SW 2 off (or Disconnect SW 2)
Short [A]
SW 1
(d) Disconnect and reconnect the connectors while watching the
test light.
The short lies between the connector where the test light
stays lit and the connector where the light goes out.
Short [B]
Disconnect
Disconnect
Light
(e) Find the exact location of the short by lightly shaking the
problem wire along the body.
Relay
CAUTION:
Short [C]
Disconnect
SW 2
Solenoid
(a) Do not open the cover or the case of the ECU unless
absolutely necessary. (If the IC terminals are touched,
the IC may be destroyed by static electricity.)
(b) When replacing the internal mechanism (ECU part) of
the digital meter, be careful that no part of your body or
clothing comes in contact with the terminals of leads
from the IC, etc. of the replacement part (spare part).
DISCONNECTION OF MALE AND FEMALE
CONNECTORS
To pull apart the connectors, pull on the connector itself, not
the wire harness.
HINT : Check to see what kind of connector you are
disconnecting before pulling apart.
Pull Up
Pull Up
Press Down
Press Down
13
SCION xB (EM0091U)
C TROUBLESHOOTING
HOW TO REPLACE TERMINAL
(with terminal retainer or secondary locking device)
Reference:
1. PREPARE THE SPECIAL TOOL
10
3
1
Example:
(Case 1)
1
HINT : To remove the terminal from the connector, please
construct and use the special tool or like object shown on
the left.
2. DISCONNECT CONNECTOR
0.2
(mm)
Up
3. DISENGAGE THE SECONDARY LOCKING DEVICE OR
Tool
TERMINAL RETAINER.
(a) Locking device must be disengaged before the terminal
locking clip can be released and the terminal removed from
the connector.
(b) Use a special tool or the terminal pick to unlock the secondary
locking device or terminal retainer.
NOTICE:
Do not remove the terminal retainer from connector body.
Terminal Retainer
[A]
Terminal Retainer
For Non–Waterproof Type Connector
HINT : The needle insertion position varies according to the
connector’s shape (number of terminals etc.), so
check the position before inserting it.
”Case 1”
Raise the terminal retainer up to the temporary lock
[Retainer at Full Lock Position]
position.
Stopper
Terminal
Retainer
[Retainer at Temporary Lock Position]
Example:
(Case 2)
Secondary
Locking Device
”Case 2”
Open the secondary locking device.
14
SCION xB (EM0091U)
C
Tool
Tab
Tab
Example:
(Case 1)
[B]
Terminal
Retainer
Tool
[Male]
Access Hole
(
Mark)
Tool
For Waterproof Type Connector
HINT : Terminal retainer color is different
according to connector body.
Example:
Terminal Retainer
Black or White
Black or White
Gray or White
: Connector Body
: Gray
: Dark Gray
: Black
[Female]
”Case 1”
Type where terminal retainer is pulled
up to the temporary lock position (Pull
Type).
Insert the special tool into the terminal
retainer access hole (YMark) and pull
the terminal retainer up to the
temporary lock position.
Retainer
at Full Lock Position
HINT : The needle insertion position varies
according to the connector’s shape
(Number of terminals etc.), so check
the position before inserting it.
Retainer
at Temporary Lock Position
[Male]
Example:
(Case 2)
[Female]
”Case 2”
Type which cannot be pulled as far as
Power Lock insert the tool straight into
the access hole of terminal retainer as
shown.
Terminal Retainer
Tool
Tool
[Male]
Press Down
Press Down
[Female]
15
SCION xB (EM0091U)
C TROUBLESHOOTING
Push the terminal retainer down to the temporary lock position.
Retainer at
Full Lock Position
Retainer at
Temporary Lock Position
[Male]
[Female]
(c) Release the locking lug from terminal and pull the terminal out
from rear.
Locking Lug
Tool
4. INSTALL TERMINAL TO CONNECTOR
(a) Insert the terminal.
HINT:
1. Make sure the terminal is positioned correctly.
2. Insert the terminal until the locking lug locks firmly.
3. Insert the terminal with terminal retainer in the temporary lock
position.
(b) Push the secondary locking device or terminal retainer in to
the full lock position.
5. CONNECT CONNECTOR
16
SCION xB (EM0091U)
ABBREVIATIONS D
ABBREVIATIONS
The following abbreviations are used in this manual.
A/C
=
Air Conditioning
A/T
=
Automatic Transaxle
ABS
=
Anti–Lock Brake System
CAN
=
Controller Area Network
CPU
=
Central Processing Unit
ECU
=
Electronic Control Unit
ESA
=
Electronic Spark Advance
IAC
=
Idle Air Control
IC
=
Integrated Circuit
INT
=
Intermittent
J/B
=
Junction Block
LCD
=
Liquid Crystal Display
LH
=
Left–Hand
O/D
=
Overdrive
PTC
=
Positive Temperature Coefficient
R/B
=
Relay Block
RH
=
Right–Hand
SFI
=
Sequential Multiport Fuel Injection
SRS
=
Supplemental Restraint System
SW
=
Switch
TEMP.
=
Temperature
TRAC
=
Traction Control
TVIP
=
TOYOTA Vehicle Intrusion Protection
VSC
=
Vehicle Stability Control
VSV
=
Vacuum Switching Valve
∗ The titles given inside the components are the names of the terminals (terminal codes) and are not treated as being
abbreviations.
17
SCION xB (EM0091U)
E GLOSSARY OF TERMS AND SYMBOLS
GROUND
The point at which wiring attaches to
the Body, thereby providing a return
path for an electrical circuit; without a
ground, current cannot flow.
BATTERY
Stores chemical energy and
converts it into electrical energy.
Provides DC current for the auto’s
various electrical circuits.
CAPACITOR (Condenser)
A small holding unit for temporary
storage of electrical voltage.
CIGARETTE LIGHTER
An electric resistance heating
element.
HEADLIGHTS
Current flow causes a headlight
1. SINGLE
FILAMENT filament to heat up and emit light. A
headlight may have either a single
(1) filament or a double (2) filament
2. DOUBLE
FILAMENT
CIRCUIT BREAKER
Basically a reusable fuse, a circuit
breaker will heat and open if too
much current flows through it.
Some units automatically reset when
cool, others must be manually reset.
HORN
An electric device which sounds a
loud audible signal.
DIODE
A semiconductor which allows
current flow in only one direction.
IGNITION COIL
Converts low–voltage DC current
into high–voltage ignition current for
firing the spark plugs.
DIODE, ZENER
LIGHT
Current flow through a filament
causes the filament to heat up and
emit light.
A diode which allows current flow in one
direction but blocks reverse flow only up
to a specific voltage. Above that potential,
it passes the excess voltage. This acts as
a simple voltage regulator.
PHOTODIODE
The photodiode is a semiconductor
which controls the current flow
according to the amount of light.
LED (LIGHT EMITTING DIODE)
Upon current flow, these diodes emit
light without producing the heat of a
comparable light.
DISTRIBUTOR, IIA
Channels high–voltage current from
the ignition coil to the individual
spark plugs.
METER, ANALOG
Current flow activates a magnetic
coil which causes a needle to move,
thereby providing a relative display
against a background calibration.
FUSE
METER, DIGITAL
Current flow activates one or many
LED’s, LCD’s, or fluorescent
displays, which provide a relative or
digital display.
A thin metal strip which burns through
when too much current flows through it,
thereby stopping current flow and
protecting a circuit from damage.
FUEL
FUSIBLE LINK
(for Medium Current Fuse)
(for High Current Fuse or
Fusible Link)
A heavy–gauge wire placed in high
amperage circuits which burns through on
overloads, thereby protecting the circuit.
The numbers indicate the crosssection
surface area of the wires.
M
18
SCION xB (EM0091U)
MOTOR
A power unit which converts
electrical energy into mechanical
energy, especially rotary motion.
E
SPEAKER
An electromechanical device which
creates sound waves from current
flow.
RELAY
Basically, an electrically operated
1. NORMALLYswitch which may be normally
CLOSED closed (1) or open (2).
Current flow through a small coil
creates a magnetic field which either
opens or closes an attached switch.
2. NORMALLY
OPEN
SWITCH, MANUAL
Opens and closes
circuits, thereby
1. NORMALLY
stopping (1) or
OPEN
allowing (2) current
flow.
RELAY, DOUBLE THROW
A relay which passes current
through one set of contacts or the
other.
2. NORMALLY
CLOSED
RESISTOR
An electrical component with a fixed
resistance, placed in a circuit to
reduce voltage to a specific value.
SWITCH, DOUBLE THROW
A switch which continuously passes
current through one set of contacts
or the other.
RESISTOR, TAPPED
A resistor which supplies two or
more different non adjustable
resistance values.
SWITCH, IGNITION
A key operated switch with several
positions which allows various
circuits, particularly the primary
ignition circuit, to become
operational.
RESISTOR, VARIABLE or RHEOSTAT
A controllable resistor with a variable
rate of resistance.
Also called a potentiometer or
rheostat.
(Reed Switch Type)
SENSOR (Thermistor)
A resistor which varies its resistance
with temperature.
SWITCH, WIPER PARK
Automatically returns wipers to the
stop position when the wiper switch
is turned off.
SENSOR, SPEED
Uses magnetic impulses to open
and close a switch to create a signal
for activation of other components.
TRANSISTOR
A solidstate device typically used as
an electronic relay; stops or passes
current depending on the voltage
applied at ”base”.
SHORT PIN
Used to provide an unbroken
connection within a junction block.
SOLENOID
An electromagnetic coil which forms
a magnetic field when current flows,
to move a plunger, etc.
WIRES
Wires are always drawn as
(1) NOT
straight lines on wiring
CONNECTED diagrams.
Crossed wires (1) without a
black dot at the junction are
not joined;
crossed wires (2) with a
black dot or octagonal ( )
(2) SPLICED
mark at the junction are
spliced (joined)
connections.
19
SCION xB (EM0091U)
F RELAY LOCATIONS
[Engine Compartment]
Fusible Link
Block
Skid Control ECU
with Actuator
Engine Room
R/B
ABS R/B
20
SCION xB (EM0091U)
F
[Instrument Panel]
Door Lock
Control Relay
A/C Amplifier
Door Control
Receiver
Rear Window
Defogger Relay
Headlight Relay
Engine Control
Module
Front Fog Light
Relay
Fuse Block
Instrument
Panel J/B
Airbag Sensor
Assembly
Shift Lock
Control SW
[Body]
Occupant Classification ECU
21
SCION xB (EM0091U)
F RELAY LOCATIONS
: Engine Room R/B
Engine Compartment Left (See Page 20)
FAN NO.2 Relay
3
2
2
3
5
1
5
2
SPARE
15A
DOME
1 15A
EFI
1 15A
HORN
1 15A
AM2
1 15A
ST
1 30A
2
SPARE
30A
*1
1 10A 2
*2
1 10A 2
1
2
3
2
4
1
2
ST Relay
5
* 1:H-LP LH / H-LP LO LH
* 2:H-LP RH / H-LP LO RH
FAN NO.1 Relay
2
1
2
3
1
1
1
2
2
2
EFI Relay
5
1
40A ABS NO.1
(for High Current)
1
3
5
2
2
3
HORN Relay
5
1
50A HTR SUB1
(for High Current)
30A RDI
(for High Current)
HTR SUB1 Relay
22
SCION xB (EM0091U)
F
Fusible Link Block
Engine Compartment Left (See Page 20)
120A ALT
(for High Current)
3
4
5
1
60A MAIN
(for High Current)
2
: ABS R/B
60A ABS
(for High Current)
Engine Compartment Right (See Page 20)
1
2
5
5
3
2
1
3
ABS CUT Relay
ABS MTR Relay
23
SCION xB (EM0091U)
F RELAY LOCATIONS
: Instrument Panel J/B
Lower Finish Panel (See Page 21)
1B
6
7
8
9
10
11
12
13
1
2
3
4
5
(from Engine Room Main Wire)
Gray
Gray
3
4
5
6
1
1T
2
1
2
1 3
4
5
2 6
3
4
5
6
7
8
9
1
2
5
6
7
8
9
3 10
4 11
1 6
2 7
3 8
9
10
11
4 12
5 13
(from Floor Wire)
1A
5
6
7
8
9
10
11
1
2
3
4
(from Engine Room Main Wire)
HTR Relay
1C
1
2
4
3
4 1
5 2
6
7
8
9 3
PWR Relay
(from Engine Room Main Wire)
1
1S
1 2
4 5 6
(from Floor Wire)
3
7
FLSH Relay
8
3
5
1
1
5
3
5
2
1
C/OPN Relay
2
40A HTR
(for High Current)
30A POWER
(for High Current)
40A AM1
(for High Current)
1
1
1
1
2
2
2
2
GAUGE
D/L
TAIL
10A
25A
10A
WIPER
ECU-B
FOG
20A
7.5A
15A
HAZ
ACC
ECU-IG
OBD
15A
7.5A
7.5A
10A
A. C
STOP
7.5A
10A
24
SCION xB (EM0091U)
30A DEF
(for High Current)
F
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
1P
1R
1 2 3 4 5
6 7 8 9 10
(from Instrument Panel Wire)
(from Instrument Panel Wire)
1G
1 2 3 4 5 6 7 8 9
9 8 7 6 5 4 3 2 1
10 9 8 7 6 5 4 3 2 1
10 11 12 13 14 15 16 17 18
18 17 16 15 14 13 12 11 10
20 19 18 17 16 15 14 13 12 11
5 4 3 2 1
10 9 8 7 6
(from Instrument Panel Wire)
1H
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18
1M
1 2
3
4 5 6 7 8 9
(from Instrument Panel Wire)
3
9 8 7 6 5 4 3 2 1
18 17 16 15 14 13 12 11 10
2 1
9 8 7 6 5 4
5 4
3 2 1
13 12 11 10 9 8 7 6
1L
1 2 3
4 5
6 7 8 9 10 11 12 13
(from Instrument Panel Wire)
(from Instrument Panel Wire)
1E
1 2 3 4 5
5 4 3 2 1
6 7 8 9 10
10 9 8 7 6
4 3
10 9
8
7
2 1
6 5
1F
7 6 5 4 3 2 1
1 2 3 4 5 6 7
14 13 12 11 10 9 8
8 9 10 11 12 13 14
(from Instrument Panel Wire)
1 2
5 6 7
3 4
8 9 10
(from Instrument Panel Wire)
1J
Yellow
1D
4 3
6 5 4 3 2 1
12 11 10 9 8 7
10 9 8
2 1
7 6 5
4
3
2
1
8
7
6
5
1 2
3 4
5 6 7
(from Instrument Panel Wire)
8 9 10
(from Instrument Panel Wire)
1 2 3 4 5 6
7 8 9 10 11 12
1K
4 3
2 1
11 10 9 8 7 6 5
(from Instrument Panel Wire)
Black
1N
1O
1
5
2
6
3
7
4
8
(from Instrument Panel Wire)
1 2
3 4
5 6 7 8 9 10 11
(from Instrument Panel Wire)
25
SCION xB (EM0091U)
F RELAY LOCATIONS
[Instrument Panel J/B Inner Circuit]
4 1A
4 1F
5 1S
12 1G
7 1L
10 1K
3 1N
2 1F
10 1B
5 1M
11 1B
1 1R
1 1A
3 1G
4 1N
6 1P
4 1S
2 1R
6 1G
4 1G
1 1S
8 1L
3 1A
5 1D
5 1O
6 1O
7 1H
8 1G
3 1S
5 1G
8 1A
4 1L
9 1A
7 1M
8 1M
10 1R
3 1R
13 1B
12 1B
9 1S
9 1M
2 1J
10 1F
5 1N
9 1R
8 1K
1 1P
9 1K
7 1F
4 1T
7 1K
5 1B
12 1H
1 1D
5 1P
9 1B
10 1P
4 1B
4 1D
14 1H
3 1P
7 1S
9 1E
16 1G
13 1H
1 1B
2 1H
2 1B
18 1P
3 1T
7 1G
8 1D
8 1P
9 1D
10 1H
1 1E
14 1G
7 1P
7 1O
6 1E
15 1H
10 1E
9 1G
5 1R
16 1H
2 1E
1 1G
4 1E
6 1H
17 1G
18 1G
3 1E
4 1H
9 1P
10 1G
1 1H
17 1H
20 1P
8 1F
(Cont. next page)
26
SCION xB (EM0091U)
F
* 1:Before Dec. 2005 Production
* 2:From Dec. 2005 Production
(Cont'd)
12 1L
5 1L
11 1L
3 1H
4 1K
6 1F
19 1P
13 1L
5 1H
1 1F
7 1A
1 1O
11 1A
6 1K
8 1H
12 1F
6 1S
5
3
1
2
6 1T
9 1H
11 1K
C/OPN Relay
3 1D
3 1K
2 1D
2 1M
2 1O
6 1M
1 1K
10 1N
5 1K
11 1N
7 1R
13 1P
14 1P
15 1P
6 1J
16 1P
11 1F
17 1P
2 1N
40A AM1
10 1A
18 1H
9 1J
7.5A A. C
1
4
3
5
2
1 1J
2 1S
1 1L
1 30A DEF 2
1
10A STOP
40A HTR
7 1J
2
1
1
4 1R
2
10A TAIL
2
3
2 1L
5
2
PWR Relay
7.5A ECU-B
1
30A POWER
3 1M
1 1M
4 1J
5 1T
6 1B
10 1L
4 1P
9 1L
14 1F
8 1B
6 1R
7.5A OBD
6 1A
7 1B
8 1S
8 1J
4 1M
25A D/L
HTR Relay
8 1O
1 1C
1
3
5
6
8
2
IG
GND
7
8 1N
LL
EL
1 1N
ER
3 1O
15A ACC
EHW
LR
+B
4
12 1K
10A HAZ
6 1L
6 1N
FLSH Relay
9 1F
9 1N
5 1E
1 1T
13 1G
5 1A
20A WIPER
2 1A
7 1N
3 1J
5 1J
4 1O
7.5A ECU-IG
3 1L
8 1R
10 1D
10A GAUGE
(*1)
11 1P
3 1B
(*2)
10 1J
15A FOG
11 1H
2 1K
27
SCION xB (EM0091U)
G ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
E2
H3
B1
B2
F8
F9
F7
* 1:Before Dec. 2005 Production
* 2:From Dec. 2005 Production
A5
C2
A4
F6
F5
H2
F2
F17
H1
(*1)
(*2)
(*2)
(*1)
G2
F16
F1
F3
G1
A2
F4
C3
C1
H5
A3
F
F
F
F
F
A 1 A/C Condenser Fan Resistor
A 2 A/C Magnetic Valve
A 3 A/T Indicator Light SW
Back–Up Light SW
Park/Neutral Position SW
A 4 ABS Speed Sensor Front LH
A 5 ABS Speed Sensor Front RH
1
2
3
4
5
F 6
F 7
F 8
F 9
F 16
F 17
B 1 Back–Up Light SW
B 2 Brake Fluid Level Warning SW
C 1 Camshaft Position Sensor
C 2 Camshaft Timing Oil Control Valve
C 3 Crankshaft Position Sensor
E 1 Electronically Controlled Transmission Solenoid
E 2 Engine Coolant Temp. Sensor
E1
H4
A1
Front Airbag Sensor LH
Front Airbag Sensor RH
Front Fog Light LH
Front Fog Light RH
Front Parking Light LH
Front Turn Signal Light LH
Front Parking Light RH
Front Turn Signal Light RH
Front Wiper Motor
Fusible Link Block
Fusible Link Block
Front Airbag Sensor LH
Front Airbag Sensor RH
G 1 Generator
G 2 Generator
H
H
H
H
H
1
2
3
4
5
Headlight LH
Headlight RH
Heated Oxygen Sensor (Bank 1 Sensor 1)
Horn (High)
Horn (Low)
28
SCION xB (EM0091U)
G
Position of Parts in Engine Compartment
N1
P1
I2
I3
I4
I5
V1
M1
S3
S2
S1
P2
T2
W1
O1
T1
S4
I1
I6
I
I
I
I
I
I
I
I
I
1
2
3
4
5
6
7
8
9
Idle Air Control Valve
Ignition Coil and Igniter No.1
Ignition Coil and Igniter No.2
Ignition Coil and Igniter No.3
Ignition Coil and Igniter No.4
Injector No.1
Injector No.2
Injector No.3
Injector No.4
I7
I8
I9
K1
S5
R1
P 1 Power Steering Oil Pressure Sensor
P 2 Pressure Sensor
R 1 Radiator Fan Motor
S
S
S
S
S
1
2
3
4
5
Side Turn Signal Light LH
Side Turn Signal Light RH
Skid Control ECU with Actuator
Starter
Starter
K 1 Knock Sensor (Bank 1)
M 1 Mass Air Flow Meter
T 1 Throttle Position Sensor
T 2 Turbine Speed Sensor
N 1 Noise Filter (Ignition)
V 1 VSV (Purge)
O 1 Oil Pressure SW
W 1 Washer Motor
29
SCION xB (EM0091U)
G ELECTRICAL WIRING ROUTING
Position of Parts in Instrument Panel
D4
I11
I12
D2
I15
C6
I13
A18
A17
A14
A6
A8
A12
* 1:Before Dec. 2005 Production
* 2:From Dec. 2005 Production
D3
C8
I10
C5
H6
F10
B3
F15
B4
D1
E3
E4
A13
C7
C9
A19
A9
A20
A10
A21
A11
(*2)
(*1)
(*2)
(*1)
(*2)
(*1)
A 6 A/C Thermistor
A 7 A/T Shift Lever Illumination
O/D Main SW
A 8 Air Inlet Servo Motor
A 9 Airbag Sensor Assembly
A 10 Airbag Sensor Assembly
A 11 Airbag Sensor Assembly
A 12 Airbag Squib (Front Passenger’s Airbag Assembly)
A 13 Airbag Squib (Steering Wheel Pad)
A 14 Antenna Amplifier
A 17 A/C Amplifier
A 18 A/C Amplifier
A 19 Airbag Sensor Assembly
A 20 Airbag Sensor Assembly
A 21 Airbag Sensor Assembly
B 3 Blower Motor
B 4 Blower Resistor
C
C
C
C
C
C
4
5
6
7
8
9
Cigarette Lighter
Clutch Start SW
Combination Meter
Combination SW
Combination SW
Combination SW
C4
A7
H7
F11
E5
E6
D 1 Data Link Connector 3
D 2 Defroster Mode Detection SW
Inlet Air Position Detection SW
D 3 Door Control Receiver
D 4 Door Lock Control Relay
E
E
E
E
3
4
5
6
Engine Control Module
Engine Control Module
Engine Control Module
Engine Control Module
F 10 Front Fog Light Relay
F 11 Front Fog Light SW
F 15 Fuse Block
H 6 Headlight Relay
H 7 Heated Oxygen Sensor (Bank 1 Sensor 2)
I
I
I
I
I
10
11
12
13
15
Ignition SW
Integration Control and Panel
Integration Control and Panel
Integration Control and Panel
Integration Control and Panel
30
SCION xB (EM0091U)
G
Position of Parts in Instrument Panel
T4
V2
J3
J2
J6
J7
R2
R3
R18
O4
J8
T5
N2
O2
J1
R5
R4
P15
J5
R6
J
J
J
J
J
J
J
J
1
2
3
4
5
6
7
8
T3
J4
S8
Junction Connector
Junction Connector
Junction Connector
Junction Connector
Junction Connector
Junction Connector
Junction Connector
Junction Connector
N 2 Noise Filter (Rear Window Defogger No.1)
O 2 Option Connector (TVIP)
O 3 Option Connector (IPOD Unit)
O 4 Option Connector (Radio and Player)
P 3 Parking Brake SW
P 5 PTC Heater
P 15 Passenger Seat Belt Warning Lamp
P5
U1
S7
S6
Y1
O3
S9
P3
R 2
R 3
R 4
R 5
R 6
R18
Radio and Player
Radio and Player
Rear Window Defogger Relay
Remote Control Mirror SW
Rheostat
Radio and Player
S
S
S
S
Shift Lock Control SW
Steering Sensor
Stop Light SW
Stereo Jack Adapter
6
7
8
9
T 3 TRAC OFF SW
T 4 Tweeter LH
T 5 Tweeter RH
U 1 Unlock Warning SW
V 2 VSC Buzzer
Y 1 Yaw Rate Sensor
31
SCION xB (EM0091U)
G ELECTRICAL WIRING ROUTING
Position of Parts in Body
F13
D12
D10
I14
D6
H8
D14
* 1:Before Dec. 2005 Production
* 2:From Dec. 2005 Production
J9
D11
D8
F12
B6
L1
J10
D9
D5
B9
B7
(*2)
(*1)
A 15 ABS Speed Sensor Rear LH
A 16 ABS Speed Sensor Rear RH
D13
A15
D7
B10
B8
(*2)
(*1)
F14
D10
D 11
D12
D13
D14
A16
H 8 High Mounted Stop Light
I 14 Interior Light
J 9 Junction Connector
J 10 Junction Connector
L 1 License Plate Light
C10 Canister Pump Module
5
6
7
8
9
B5
F 12 Front Door Speaker LH
F 13 Front Door Speaker RH
F 14 Fuel Pump
Fuel Sender
B 5 Back Door Courtesy SW
Back Door Lock Motor
B 6 Back Door Opener SW
B 7 Buckle SW LH
Seat Position Sensor
B 8 Buckle SW RH
Occupant Detection Sensor
B 9 Buckle SW LH
Seat Position Sensor
B 10 Buckle SW RH
D
D
D
D
D
C10
Door Courtesy SW Front LH
Door Courtesy SW Front RH
Door Courtesy SW Rear LH
Door Courtesy SW Rear RH
Door Key Lock and Unlock SW Front LH
Door Lock Motor Front LH
Door Unlock Detection SW Front LH
Door Key Lock and Unlock SW Front RH
Door Lock Motor Front RH
Door Lock Control SW Front LH
Power Window Master SW
Door Lock Control SW Front RH
Door Lock Motor Rear LH
Door Lock Motor Rear RH
32
SCION xB (EM0091U)
G
Position of Parts in Body
O9
O7
O6
O5
R17
P10
P6
O8
O10
P14
P8
P12
R16
R15
R13
P9
R12
R8
N4
R10
R14
N3
P13
N 3 Noise Filter (Fuel Pump)
N 4 Noise Filter
(Stop Light and Rear Window Defogger No.2)
O 5
O 6
O 7
O 8
O 9
O10
Occupant Classification ECU
Occupant Classification ECU
Occupant Classification Sensor Front LH
Occupant Classification Sensor Front RH
Occupant Classification Sensor Rear LH
Occupant Classification Sensor Rear RH
P 6
P 7
P 8
P 9
P 10
P 11
P 12
P 13
P 14
Power Window Control SW Front RH
Power Window Control SW Rear LH
Power Window Control SW Rear RH
Power Window Motor Front LH
Power Window Motor Front RH
Power Window Motor Rear LH
Power Window Motor Rear RH
Pretensioner LH
Pretensioner RH
P7
P11
R11
R9
R 7
R 8
R 9
R10
R 11
R12
R13
R14
R15
R16
R17
R7
Rear Combination Light LH
Rear Combination Light RH
Rear Side Marker Light LH
Rear Side Marker Light RH
Rear Speaker LH
Rear Speaker RH
Rear Window Defogger
Rear Window Defogger
Rear Wiper Motor
Remote Control Mirror LH
Remote Control Mirror RH
33
SCION xB (EM0091U)
G ELECTRICAL WIRING ROUTING
: Location of Connector Joining Wire Harness and Wire Harness
: Location of Ground Points
Engine Wire
ED
EC
EA
EB
EA1
Engine Room
Main Wire
Sensor Wire
EB1
34
SCION xB (EM0091U)
G
: Location of Connector Joining Wire Harness and Wire Harness
IA3
IE1
IA2
IA1
Instrument
Panel Wire
IF1
IF2
A/C Sub
Wire
Front Door
RH Wire
IB1
IB2
IH1
Engine Room
Main Wire
IG1
Front Door
LH Wire
IG2
IC1
IC2
Floor Wire
ID1
Floor Wire
Engine Wire
: Location of Ground Points
IG
IE
IF
35
SCION xB (EM0091U)
G ELECTRICAL WIRING ROUTING
: Location of Connector Joining Wire Harness and Wire Harness
: Location of Ground Points
Front Door
RH Wire
BB1
BI
Rear Door
No.1 RH Wire
BK
BC1
BC2
Rear Window
No.1 Wire
BD1
Front Door
LH Wire
BL
Back Door
No.1 Wire
Rear Window
No.2 Wire
BA1
BH
Rear Door No.1
Floor Wire LH Wire
BJ
Lamp Wire
36
SCION xB (EM0091U)
BM
BE1
Power Source
B–G
50A HTR SUB1
B
1
1
2
R
1
30A RDI
1
2
L–W
1
40A ABS NO. 1
2
B
1
B
B–G
1
15A AM2
B–L
2
5 A
2
3 A
60A MAIN
60A ABS
B
1
B–R
1 1O
30A ST
1
120A ALT
1
7 1A
B
4 A
W–R
1
10A H–LP LH/
H–LP LO LH
1
B–R
1 B
1
B–L
1
2
10A H–LP RH/
H–LP LO RH
Skid Control ECU
with Actuator
G2
Generator
B
1
1
2
1
B–W
15A HORN
1
2
1
G–W
15A DOME
1
2
F 8(A), F 9(B)
Fusible Link Block
1
L–Y
15A EFI
1
Battery
38
SCION xB (EM0091U)
2
1
B–Y
W–R
HTR Relay
1
2
5
3
40A HTR
1
1C
B–G
2
1
7. 5A A. C
4
30A POWER
2
1
25A D/L
7. 5A ECU–B
10A HAZ
10A STOP
10A TAIL
7. 5A OBD
15A FOG
30A DEF
2
1
40A AM1
2
1
ACC 3
1 AM1
8
1O
L–R
3
1O
15A ACC
B–Y
4
1O
7. 5A ECU–IG
IG1 2
IG2 6
B
ST2 4
B
5 AM2
10A GAUGE
20A WIPER
I10
Ignition SW
8 1J
6
IB2
B
1
7. 5A I/UP
2 1O
W–B
B–R
3 1K
2
B–Y
B–R
3
5
R–B
1
2
F15
Fuse Block
W–B
B
W–R
W–L
W–B
R4
Rear Window
Defogger Relay
IE
39
SCION xB (EM0091U)
Power Source
: Parts Location
Code
See Page
Code
See Page
Code
See Page
F8
A
28
F15
30
I10
30
F9
B
28
G2
28
R4
31
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
1C
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1J
1K
1O
: Connector Joining Wire Harness and Wire Harness
Code
IB2
See Page
35
Joining Wire Harness and Wire Harness (Connector Location)
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
: Ground Points
Code
IE
See Page
35
Ground Points Location
Left Kick Panel
40
SCION xB (EM0091U)
Memo
41
SCION xB (EM0091U)
Starting and Ignition
B
3
1A
6
1E
I10
Ignition SW
B–R
B
15
EA1
B
W–R
B–R
13
IF1
(M/T)
B
(A/T)
B(A/T)
ST2 4
6
1O
7
1O
B
B
(M/T)
B
IG2 6
(A/T)
5 AM2
C5
Clutch
Start SW
1
A3
Park/Neutral
Position SW
9
2
1 1O
12
EA1
B–Y
(M/T)
P
4
IF2
N
6
B–Y
(M/T)
7 1A
B–Y
B(A/T)
B–Y
(A/T)
B–Y
(A/T)
1
B–Y
B–W
(M/T)
W–R
(M/T)
1
2
2
1
B–Y
1
15A
AM2
30A
ST
1
5
1
1
EA1
B–Y
(A/T)
ST
Relay
1
3
2
11
1
IF2
1
B–L
1
B
B(A/T)
B–Y
F8
Fusible Link Block
5 EA1
B
Battery
B–R
1 B
1
A
W–B
60A MAIN
3
M
S 4(A), S 5(B)
Starter
B–Y
EB
42
SCION xB (EM0091U)
B–R
B–R
11 EA1
I3
Ignition Coil and
Igniter No. 2
1
I4
Ignition Coil and
Igniter No. 3
1
I5
Ignition Coil and
Igniter No. 4
1
4
3
G–Y
2
W–B
4
Y
W–B
G–R
Y
G–B
G–O
G–Y
W
W–B
3
Y
Y
17 C
23 C
16 C
15 C
14 C
IGT1
IGF
IGT2
IGT3
NSW
30 A
B(A/T)
2
W–B
4
G–O
Y
3
Y
G–R
2
W–B
2
G–B
3
Y
4
W–B
N1
Noise Filter
(Ignition)
1
B–R
I2
Ignition Coil and
Igniter No. 1
B–R
B–R
B–R
B–R
1
B–R
B–R
B–R
B–R
IGT4
STA
12 A
E 3(A), E 5(C)
Engine Control Module
B
W–B
B–Y
(A/T)
B–Y
ED
43
SCION xB (EM0091U)
Starting and Ignition
: Parts Location
Code
See Page
A3
C5
Code
See Page
28
I2
29
Code
See Page
N1
29
30
I3
29
S4
A
29
E3
A
30
I4
29
S5
B
29
E5
C
30
I5
29
28
I10
30
F8
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
1E
1O
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
: Connector Joining Wire Harness and Wire Harness
Code
EA1
IF1
IF2
See Page
Joining Wire Harness and Wire Harness (Connector Location)
34
Engine Wire and Engine Room Main Wire (Inside of Engine Room R/B)
35
Engine Wire and Instrument Panel Wire (Behind the Glove Box)
: Ground Points
Code
See Page
Ground Points Location
EB
34
Front Left Fender Apron
ED
34
Engine Block
44
SCION xB (EM0091U)
Memo
45
SCION xB (EM0091U)
Charging
(IG)
10A
GAUGE
5 AM2
B
IG2 6
ST2
5 1E
W–R
6 1O
I10
Ignition SW
8 1G
B–R
1 1O
7 1A
1
R–B
Charge
C6
Combination Meter
W–R
40
16
ALT
1
24
10
L
G–B
1
9
4
IF1
B–R
B–L
11 IF1
Y
R–B
L
120A ALT
G 1(A), G 2(B)
Generator
B–R
1 B
F 8(A), F 9(B)
Fusible Link Block
3 A
60A MAIN
L
1 B
1 A
2 A
3 A
B
L
IG
M
IG
M
B
L
P
IC Regulator
Battery
F
E
E
46
SCION xB (EM0091U)
IF1
A18
A/C Amplifier
Y
15A
AM2
ALT
E5
Engine Control
Module
2
: Parts Location
Code
See Page
A18
30
C6
E5
Code
See Page
F8
A
28
30
F9
B
28
30
G1
A
28
Code
G2
See Page
B
I10
28
30
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1E
1G
1O
: Connector Joining Wire Harness and Wire Harness
Code
IF1
See Page
35
Joining Wire Harness and Wire Harness (Connector Location)
Engine Wire and Instrument Panel Wire (Behind the Glove Box)
47
SCION xB (EM0091U)
Front Wiper and Washer
(IG)
20A
WIPER
Washer SW
G
W 4
On
Off
Wiper Relay
2 1A
7 1N
5 1A
W–B
B
G
2 IA1
B
Front Wiper SW
B
EW 5
W1
Washer Motor
1
M
2
B
+S 6
GR–B
+1 7
B–R
GR
GR–B
10 IA1
11 IA1
6 IA1
GR
GR–B
B
HI
LO
INT
OFF
MIST
+2 9
B–R
C9
Combination SW
B
+B 8
1
3
2
+1
S
+
W–B
4
+2
M
11 1N
E
W–B
W–B
2 1O
5
B–W
F7
Front Wiper Motor
IE
74
SCION xB (EM0091U)
EA
System Outline
With the ignition SW turned on, the current flows to TERMINAL 8 of the front wiper and washer SW, TERMINAL 2 of the
washer motor and TERMINAL 2 of the front wiper motor through the WIPER fuse.
1. Low Speed Position
With the front wiper SW turned to LO position, the current flows from TERMINAL 8 of the front wiper and washer SW to
TERMINAL 7 to TERMINAL 1 of the front wiper motor to TERMINAL 5 to GROUND and causes the front wiper motor to run
at low speed.
2. High Speed Position
With the front wiper SW turned to HI position, the current flows from TERMINAL 8 of the front wiper and washer SW to
TERMINAL 9 to TERMINAL 4 of the front wiper motor to TERMINAL 5 to GROUND and causes the front wiper motor to run
at high speed.
3. INT Position
With the front wiper SW turned to INT position, the wiper relay operates and current flows from TERMINAL 8 of the front
wiper and washer SW to TERMINAL 5 to GROUND. This activates the intermittent circuit and the current flows from
TERMINAL 8 of the front wiper and washer SW to TERMINAL 7 to TERMINAL 1 of the front wiper motor to TERMINAL 5 to
GROUND and the wiper operates. Intermittent operation is controlled by a condenser charge and discharge function in the
relay.
4. Mist Position
With the front wiper SW turned to MIST position, the current flows from TERMINAL 8 of the front wiper and washer SW to
TERMINAL 7 to TERMINAL 1 of the front wiper motor to TERMINAL 5 to GROUND and causes the front wiper motor to run
at low speed.
5. Washer Interlocking Operation
With the washer SW pulled to ON position, the current flows from the WIPER fuse to TERMINAL 2 of the washer motor to
TERMINAL 1 to TERMINAL 4 of the front wiper and washer SW to TERMINAL 5 to GROUND and causes the washer motor
to run and the window washer to spray. Simultaneously, current flows from the WIPER fuse to TERMINAL 8 of the front wiper
and washer SW to TERMINAL 7 to TERMINAL 1 of the front wiper motor to TERMINAL 5 to GROUND, causing the wiper to
function.
: Parts Location
Code
See Page
C9
Code
30
F7
See Page
28
Code
W1
See Page
29
: Junction Block and Wire Harness Connector
Code
1A
1N
1O
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
: Connector Joining Wire Harness and Wire Harness
Code
IA1
See Page
35
Joining Wire Harness and Wire Harness (Connector Location)
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
: Ground Points
Code
See Page
Ground Points Location
EA
34
Front Right Fender Apron
IE
35
Left Kick Panel
75
SCION xB (EM0091U)
Rear Wiper and Washer
(IG)
20A
WIPER
1 1T
2 1A
C9
Combination SW
Rear Wiper
and Washer SW
B
B
Washer1
OFF
ON
Washer2
3
2
3
W–B
W1
Washer Motor
L
M
2 IB2
L
B
5
2
W–L
6 BC1
W–L
1 IA1
L
R15
Rear Wiper Motor
1
5 BC1
M
W–L
W–B
2
11 1N
W–B
2 1O
IE
76
SCION xB (EM0091U)
System Outline
When the ignition SW is turned on, current flows to TERMINAL 2 of the washer motor, TERMINAL 1 of the rear wiper motor
through the WIPER fuse.
1. Rear Wiper Normal Operation
With the ignition SW turned on and rear wiper and washer SW turned to ON position, current flows to TERMINAL 1 of the
rear wiper motor to TERMINAL 2 of the rear wiper and washer SW to TERMINAL 5 to GROUND. Causing the rear wiper
motor operated.
2. Washer Operation
With the ignition SW turned on and the rear wiper and washer SW turned to ON position, when the wiper SW is turned
further (ON+ washer position), current flows to TERMINAL 2 of the washer motor to TERMINAL 3 to TERMINAL 3 of the
rear wiper and washer SW to TERMINAL 5 to GROUND so that the washer motor rotates and the window washer emits a
water, only while the switch is fully turned.
When the wiper SW is off and then turned to washer position (Wiper off side), only the washer operates.
: Parts Location
Code
See Page
C9
30
Code
R15
See Page
33
Code
W1
See Page
29
: Junction Block and Wire Harness Connector
Code
1A
1N
1O
1T
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IA1
35
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
IB2
35
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
BC1
36
Back Door No.1 Wire and Floor Wire (Right Rear Side Quarter Pillar)
: Ground Points
Code
IE
See Page
35
Ground Points Location
Left Kick Panel
77
SCION xB (EM0091U)
Power Window
L
(IG)
B
30A
POWER
J10
Junction
Connector
L
10A
GAUGE
L
B
B
(BAT)
D11
Power Window Master SW
2
7
6
B
B
Front LH
Down
5
L
1
PWR
Relay
2
3
2 1O
2 1L
1 IC1
2 1S
IC
1 1L
L
L–W
W–B
L
E
E
1
3
DU
4
DD
9
L
G–W
C
R–L
W–B
W–B
L–W
4
5
C
J10
Junction
Connector
M
W–B
C
P9
Power Window Motor Front LH
W–B
7 IC1
W–B
IE
78
SCION xB (EM0091U)
D11
Power Window Master SW
Front RH
Rear LH
Rear RH
Window Lock SW
Lock
Normal
PU
PD
RLU
RLD
RRU
RRD
G–B
16
R–B
10
G–Y
13
R–Y
12
G–W
15
R–L
18
4 IC1
2 IC1
2 ID1
1 ID1
4 ID1
3 ID1
L
R–B
G–B
3 BA1
5 BB1
4 BB1
3 BB1
3
1
3
1
G
4
5
2
1
2
1
M
P10
Power Window Motor
Front RH
M
P11
Power Window Motor
Rear LH
Down
Up
D
1
R
U
3
P8
Power Window Control SW
Rear RH
L
Down
4 B
G
D
2
SD
R
U
P7
Power Window Control SW
Rear LH
L
4 B
5
SU
G
D
2
SD
R
U
Down
Up
4 B
5
SU
Up
2
SD
P6
Power Window Control SW
Front RH
R–L
5
SU
G–B
G–Y
4 BA1
R–B
R–Y
5 BA1
G–B
L
2 IG1
R–B
G–W
4 IG1
L–W
1 IG1
G–W
L–W
R–L
L
M
P12
Power Window Motor
Rear RH
79
SCION xB (EM0091U)
Power Window
System Outline
When the ignition SW is turned on, the current flows from the GAUGE fuse through the PWR relay to GROUND, thus the
PWR relay is turned on and the current flows through the POWER fuse to TERMINAL 5 of the PWR relay to TERMINAL 3 to
TERMINAL B of the power window master SW and TERMINAL B of the power window control SW front RH, Rear LH and
RH.
1. Manual Operation (Power Window Master SW)
When the power window master SW (Driver’s) is pushed down one step, the current flows from TERMINAL B of the power
window master SW to TERMINAL DD to TERMINAL 5 of the power window motor front LH to TERMINAL 4 to TERMINAL
DU of the power window master SW to TERMINAL E to GROUND, and the motor rotates to open the window. When the
power window master SW is pulled up one step, the current flows from TERMINAL B of the power window master SW to
TERMINAL DU to TERMINAL 4 of the power window motor front LH to TERMINAL 5 to TERMINAL DD of the power window
master SW to TERMINAL E to GROUND, and the motor rotates in the opposite direction from open and closes the window.
All the other windows are opened/closed by operating the respective power window master SW. When the window lock SW
is pushed to the lock side, the ground circuit to the passenger’s window becomes open. As a result, even if Open/Close
operation of the passenger’s window is attempted, the current from TERMINAL E of the power window master SW is not
grounded and the motor does not rotate, so the passenger’s window can not be operated and window lock occurs.
2. Auto Down Operation (Driver’s Window)
When the power window master SW (Driver’s) is pushed down two steps, the power window master SW determines that it is
AUTO operation and the current flows from TERMINAL B of the power window master SW to TERMINAL DD to TERMINAL
5 of the power window motor front LH to TERMINAL 4 to TERMINAL DU of the power window master SW to TERMINAL E to
GROUND. Because the hold circuit inside the power window master SW keeps the relay on the down side activated, the
power window motor continues operating even if the power window master SW is released. When the driver’s window is fully
opened, the hold circuit turns off and the relay on the down side turns off, and auto down operation is completed.
3. Stopping of Auto Down Operation (Driver’s Window)
When the power window master SW (Driver’s) is pulled to the up side during auto down operation, a ground circuit opens in
the power window master SW and current does not flow from TERMINAL DU of the power window master SW to TERMINAL
E, so the motor stops, causing auto down operation to stop. If the power window master SW is pulled continuously, the motor
rotates in the up direction in manual up operation.
4. Manual Operation (Power Window Control SW Front RH, Rear LH and RH)
With the power window control SW (Front RH, rear LH or RH) pulled to the up side, current flows from TERMINAL B of the
power window control SW to TERMINAL U to power window motor to TERMINAL D of the power window control SW to
TERMINAL SD to TERMINAL PD, RLD or RRD of the power window master SW to TERMINAL E to GROUND and rotates
the power window motor (Front RH, rear LH or RH) in the up direction. Up operation continues only while the power window
control SW is pulled to the up side. When the window descends, the current flowing to the motor flows in the opposite
direction, and the motor rotates in reverse. When the window lock SW is pushed to the lock side, the ground circuit to the
passenger’s window becomes open. As a result, even if Open/Close operation of the passenger’s window is attempted, the
current from TERMINAL E of the power window master SW is not grounded and the motor does not rotate, so the
passenger’s window can not be operated and window lock occurs.
: Parts Location
Code
See Page
Code
See Page
D11
32
P7
33
J10
32
P8
P6
33
P9
1L
1O
1S
See Page
See Page
P10
33
33
P11
33
33
P12
33
: Junction Block and Wire Harness Connector
Code
Code
Junction Block and Wire Harness (Connector Location)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
80
SCION xB (EM0091U)
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IC1
35
Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
ID1
35
Front Door LH Wire and Floor Wire (Left Kick Panel)
IG1
35
Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
BA1
36
Rear Door No.1 LH Wire and Floor Wire (Center Pillar LH)
BB1
36
Rear Door No.1 RH Wire and Floor Wire (Center Pillar RH)
: Ground Points
Code
IE
See Page
35
Ground Points Location
Left Kick Panel
81
SCION xB (EM0091U)
Door Lock Control
D4
Door Lock Control Relay
(BAT)
25A
D/L
KSW
UL1
18
19
G–B
L1
12
BR–Y
E
8
W–B
1
Y
B
10 1L
BR–Y
G–B
L–W
E A
B A
E A
J 2(A), J 3(B)
Junction Connector
B A
13 1L
19 1P
BR–Y
G–B
9 IG2
8 IG2
G–B
BR–Y
G–B
5
8
6
5
W–B
C
C
C
W–B
W–B
W–B
J10
Junction
Connector
C
W–B
W–B
7 IC1
8 IG1
W–B
W–B
2 1O
W–B
3
W–B
3
Lock
Unlock
1
W–B
16 1P
Lock
D11
Door Lock Control SW
Front LH
W–B
1
Unlock
G–B
8 IC2
D12
Door Lock Control SW
Front RH
BR–Y
9 IC2
U1
Unlock
Warning SW
2
BR–Y
E B
Y
B B
W–B
W–B
W–B
IE
82
SCION xB (EM0091U)
D4
Door Lock Control Relay
UL2
22
20
L–R
L–W
L2
11
Y–G
ACTD
21
Y–B
UL3
6
L–R
LSWD
L–B
L–O
J8
Junction
Connector
B
L–W
B
L–W
B
L–O
L–O
L–B
6
5
1
2
1
2
5
6
3
M
D9
Door Key Lock and Unlock SW Front LH
Door Lock Motor Front LH
Door Unlock Detection SW Front LH
Lock
Unlock
4
Lock
L–B
L–W
6 IG1
L–W
L–R
5 IG1
L–R
L–O
10 IG2
L–O
Y–G
11 IG2
Y–G
L–W
6 IC1
L–W
Y–B
5 IC1
Y–B
10 IC2
Unlock
11 IC2
L–R
5 IC2
Unlock
Detection
L–R
L–O
4
M
D10
Door Key Lock and Unlock SW Front RH
Door Lock Motor Front RH
W–B
W–B
W–B
83
SCION xB (EM0091U)
Door Lock Control
7
L–O
R–W
PCTY
5
8 1L
4 1L
1 1S
3 1S
R–W
DCTY
2
R
ACT+
3
R
ACT–
L–B
D4
Door Lock Control Relay
L–B
L–O
A
A
C
A
C
J8
Junction
Connector
C
C
L–O
L–B
L–O
2 BA1
1 BB1
2 BB1
L–B
L–O
L–B
L–O
1
2
1
2
M
D13
Door Lock
Motor Rear LH
M
D14
Door Lock Motor
Rear RH
84
SCION xB (EM0091U)
1
1
D8
Door Courtesy SW
Rear RH
1
D7
Door Courtesy SW
Rear LH
R–W
R–W
R–W
R–W
R–W
L–O
L–B
1 BA1
1
D6
Door Courtesy SW
Front RH
L–O
4 IB2
R–W
D5
Door Courtesy SW
Front LH
L–B
1 IB2
L–B
L–O
BDSU
17
16
9
BR–Y
W–R
V–W
BKL
SPD
IG
26
R–B
BACT
10
L–Y
D4
Door Lock Control Relay
13 IB2
5 IB2
J 6(A), J 7(B)
Junction
Connector
4 1K
F B
J 4(A), (B)
Junction
Connector
B A (∗1)
C B (∗2)
B A (∗1)
C B (∗2)
6 1F
R–B
L–Y
BR–Y
W–R
3 BC1
1 BC2
12 IB1
BR–Y
W–R
D A
2
3
1
(∗1)
1
(∗2)
(∗1)
W–R
4
R–B
1
D A (∗1)
D B (∗2)
J 4(A), (B)
Junction
Connector
M
B7
Buckle SW LH
3
B6
Back Door
Opener SW
L–Y
2
B5
Back Door Courtesy SW
Back Door Lock Motor
4 BC1
R–W
V–W
R–W
D A (∗1)
D B (∗2)
W–B
W–B
W–B
V–W
7
5
LBE–
B9
Buckle SW LH
Seat Position Sensor
W–B
W–B
A9
Airbag Sensor
Assembly
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
BL
85
SCION xB (EM0091U)
Door Lock Control
(IG)
(BAT)
10A
GAUGE
15A
DOME
2
1
L–Y
13 1G
R–B
3 1L
R–B
4 1A
12 1G
L–Y
R–B
1
C6
Combination Meter
Speedometer
23
CPU
21
28
BR
V–W
W–R
29
V–W
12
SP1
BR
S3
Skid Control ECU
with Actuator
W–R
13 IA1
IF
86
SCION xB (EM0091U)
System Outline
The current always flows to TERMINAL 1 of the door lock control relay through the D/L fuse.
1. Manual Lock Operation
When the door lock control SW or door key lock and unlock SW are operated to LOCK position, a lock signal is input to
TERMINAL 18 or 20 of the door lock control relay and causes the door lock control relay to function. The current flows from
TERMINAL 1 of the door lock control relay to TERMINAL 2 to the door lock motors to TERMINALS 3 and 11 of the door lock
control relay to TERMINAL 12 to GROUND and the door lock motors locks the door.
2. Manual Unlock Operation
When the door lock control SW or door key lock and unlock SW are operated to UNLOCK position, an unlock signal is input
to TERMINAL 19, 21 or 22 of the door lock control relay and causes the door lock control relay to function. The current flows
from TERMINAL 1 of the door lock control relay to TERMINALS 3 and 11 to the door lock motors to TERMINAL 2 of the door
lock control relay to TERMINAL 12 to GROUND and the door lock motors unlocks the door.
3. Double Operation Unlock Operation
When the door key lock and unlock SW front LH is turned to the unlock side, only the driver’s door is unlocked. By turning
the door key lock and unlock SW front LH to the unlock side, a signal is input to TERMINAL 21 of the door lock control relay,
and if the signal is input again within 3 seconds by turning the SW to the unlock side again, current flows from TERMINAL 11
of the door lock control relay to the door lock motors to TERMINAL 2 of the door lock control relay to TERMINAL 12 to
GROUND, causing all the other doors are unlocked.
: Parts Location
Code
See Page
Code
See Page
Code
30
D7
32
B5
32
D8
32
B6
32
D9
32
B7
32
D10
32
B9
32
D11
32
C6
30
D12
32
J8
31
D4
30
D13
32
J10
32
D5
32
D14
32
S3
29
D6
32
31
U1
31
J2
A
J3
See Page
A9
B
31
A
31
B
31
J6
A
31
J7
B
31
J4
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
1F
1G
1K
1L
1O
1P
1S
87
SCION xB (EM0091U)
Door Lock Control
: Connector Joining Wire Harness and Wire Harness
Code
IA1
See Page
Joining Wire Harness and Wire Harness (Connector Location)
35
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
35
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
35
Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
35
Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
BA1
36
Rear Door No.1 LH Wire and Floor Wire (Center Pillar LH)
BB1
36
Rear Door No.1 RH Wire and Floor Wire (Center Pillar RH)
36
Back Door No.1 Wire and Floor Wire (Right Rear Side Quarter Pillar)
IB1
IB2
IC1
IC2
IG1
IG2
BC1
BC2
: Ground Points
Code
See Page
Ground Points Location
IE
35
Left Kick Panel
IF
35
Instrument Panel Brace LH
BL
36
Back Door Center
88
SCION xB (EM0091U)
Memo
89
SCION xB (EM0091U)
Wireless Door Lock Control
D4
Door Lock Control Relay
(IG)
10A
GAUGE
IG
1
LSWD
E
UL3
ACTD
12
6
21
11
Y–G
B
26
Y–B
3 1L
R–B
10 1L
L–R
25A
D/L
W–B
(BAT)
B A (∗1)
C B (∗2)
J 4(A), (B)
Junction
Connector
B A (∗1)
C B (∗2)
L–W
R–B
L–W
L–O
L–O
Y–G
4
6
5
1
2
M
D9
Door Key Lock and Unlock SW Front LH
Door Lock Motor Front LH
Door Unlock Detection SW Front LH
W–B
3
C
Lock
Y–G
L–W
6 IC1
L–W
Y–B
5 IC1
Y–B
10 IC2
Unlock
11 IC2
L–R
5 IC2
Unlock
Detection
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
L–R
L–O
J10
Junction
Connector
W–B
C
W–B
7 IC1
W–B
W–B
W–B
IE
90
SCION xB (EM0091U)
D4
Door Lock Control Relay
L–R
L–W
ACT–
ACT+
3
2
L–O
20
L–B
L2
UL2
22
A
C
A
C
L–B
L–O
C
B
A
J8
Junction
Connector
J8
Junction
Connector
B
L–W
B
L–W
C
L–O
L–B
L–O
2
5
6
4 IB2
L–O
L–B
L–O
1 BA1
2 BA1
1 BB1
2 BB1
L–O
L–B
L–O
D10
Door Key Lock and Unlock SW Front RH
Door Lock Motor Front RH
L–B
M
L–B
Lock
W–B
4
L–O
L–O
L–W
1
1 IB2
L–O
L–B
6 IG1
L–B
L–W
5 IG1
L–B
L–R
10 IG2
Unlock
11 IG2
L–R
L–O
1
2
1
2
M
M
W–B
8 IG1
D13
Door Lock
Motor Rear LH
D14
Door Lock Motor
Rear RH
W–B
91
SCION xB (EM0091U)
1
92
SCION xB (EM0091U)
W–B
1
B5
Back Door Courtesy SW
Back Door Lock Motor
4 BC1
3 BC1
R–W
L–Y
R–W
W–B
1
R–W
R–W
D8
Door Courtesy SW
Rear RH
L–Y
R
R–W
L–Y
3 1S
R–W
R–W
1 1S
D7
Door Courtesy SW
Rear LH
R–W
4 1L
W–B
1
D6
Door Courtesy SW
Front RH
R
8 1L
W–B
D5
Door Courtesy SW
Front LH
Wireless Door Lock Control
D4
Door Lock Control Relay
DCTY
PCTY
BACT
5
7
10
13 IB2
R–W
2
3
M
1
4
BL
D4
Door Lock Control Relay
RDA
LP
4
25
PRG
KSW
24
8
G–O
15A
DOME
Y
R–Y
(BAT)
HAZ
15
13 1L
1 1H
19 1P
10 1G
2
3 IB2
V
L
L–Y
1
2
3
RDA
PRG
2
GND
OFF
ON
DOOR
D3
Door Control Receiver
1
1
8
EHW
FLSH Relay
W–B
W–B
1
15 1P
16 1P
2 1O
W–B
I14
Interior Light
+B
G–O
5
Y
L–Y
2
4 1J
U1
Unlock
Warning SW
7 1L
R–Y
5 1S
L–Y
4 1A
IE
93
SCION xB (EM0091U)
Wireless Door Lock Control
D4
Door Lock Control Relay
(BAT)
(BAT)
10A
H–LP RH
/H–LP LO RH
HORN
HRLY
23
13
10A
H–LP LH
/H–LP LO LH
2
2
1
1
B
B–R
R
W–R
(BAT)
3
B
C A (∗1)
B B (∗2)
J 4(A), (B)
Junction
Connector
C A (∗1)
B B (∗2)
2
B–Y
8 1A
G–W
G–W
W–R
1
B–W
2
1
1
B–W
9 1A
5 IA2
7 1M
1
1
B–W
1
5
B A
B
HORN
Relay
4 IA1
2
1
J 6(A), J 7(B)
Junction
Connector
B B
3
1
B–W
W–R
1
3
G–R
G–R
H6
Headlight
Relay
2
5
R
H5
Horn
(Low)
1
H4
Horn
(High)
W–B
1
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
IG
94
SCION xB (EM0091U)
3
H2
Headlight
RH
H1
Headlight
LH
2
B–Y
15A
HORN
System Outline
Door lock control (Lock and unlock) and panic control (Theft alarm and flash) is performed by remote control, without the
ignition SW at OFF, using low–power electrical waves emitted by a transmitter.
1. Wireless Door Lock or Unlock Normal Operation
With the ignition SW at OFF (Unlock warning SW off) and all the doors completely closed, when the lock or unlock button
(Transmitter) is pushed, the wireless door lock control receiver receives the electrical waves from the transmitter, and sends
a signal to the door lock control relay causing it to operate.
As a result, the door lock control relay judges whether the door is locked or unlocked based on the signal from the door lock
motor and door unlock detection SW, and sends a signal to switch the condition from lock to unlock or vice versa, causing
the door lock motor to operate.
2. Visual Confirmation of Lock or Unlock
If all doors indicate that they are locked after the lock command, parking lights and hazard lights will flash once. If any door
indicates that it is open after the unlock command, parking lights and hazard lights will flash twice.
3. Wireless Door Unlock Operation
Pushing the unlock button (Transmitter) once, driver’s door is unlocked. Furthermore, pushing the button again within 3
seconds, the other doors are unlocked.
4. Automatic Lock Operation
With the ignition key not inserted into the ignition key cylinder (Unlock warning SW off) and all the doors completely closed,
after pushing the button (Transmitter) to unlock all the doors, if a door is not opened within 30 seconds, all the doors will be
automatically relocked.
5. Wireless Control Stop Function
If a door is open (Door courtesy SW on), a signal is input from the door courtesy SW to the door lock control relay stopping
wireless door lock or unlock.
If the ignition key is in the ignition key cylinder (Unlock warning SW on), the unlock warning SW inputs a signal to the door
lock control relay stopping wireless door lock or unlock.
6. Repeat Function
In case an appropriate lock detection signal is not received after outputting a lock signal when pushing the lock button
(Transmitter), 2 seconds later, the door lock control relay output the lock signal again.
7. Remote Panic Operation
Panic will function when doors are locked or unlocked, open or closed. When the panic button (Transmitter) is pushed once,
theft alarm sounds and headlights and hazard lights flash. Then, the panic or the unlock button (Transmitter) is pushed once
more, sounding and flashing will stop. Panic will not function when ignition SW at ON.
: Parts Location
Code
See Page
Code
See Page
Code
See Page
B5
32
D10
32
I14
D3
30
D13
32
D4
30
D14
32
D5
32
H1
28
J6
D6
32
H2
28
J7
D7
32
H4
28
J8
31
D8
32
H5
28
J10
32
D9
32
H6
30
U1
31
J4
32
A
31
B
31
A
31
B
31
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
95
SCION xB (EM0091U)
Wireless Door Lock Control
: Junction Block and Wire Harness Connector
Code
1A
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
1G
1H
1J
1L
1M
1O
1P
1S
: Connector Joining Wire Harness and Wire Harness
Code
IA1
See Page
Joining Wire Harness and Wire Harness (Connector Location)
35
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
35
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
35
Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
35
Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
BA1
36
Rear Door No.1 LH Wire and Floor Wire (Center Pillar LH)
BB1
36
Rear Door No.1 RH Wire and Floor Wire (Center Pillar RH)
BC1
36
Back Door No.1 Wire and Floor Wire (Right Rear Side Quarter Pillar)
IA2
IB2
IC1
IC2
IG1
IG2
: Ground Points
Code
See Page
Ground Points Location
IE
35
Left Kick Panel
IG
35
Right Kick Panel
BL
36
Back Door Center
96
SCION xB (EM0091U)
Memo
97
SCION xB (EM0091U)
ECT and A/T Indicator
B–R
(BAT)
5 AM2
(BAT)
IG2 6
15A
EFI
ST2 4
W–R
(BAT)
10A
STOP
7. 5A
OBD
2
8 1G
7 1A
W
B
D1
Data Link
Connector 3
16
14
BAT
6
CANL
G–Y
6 1O
W–R
B–R
7 1O
8 1B
4 1P
B–Y
B
1 1O
1
B
I10
Ignition SW
CANH
6 1E
W–R
B
2
GR
SG
CG
5
4
TC
S8
Stop
Light SW
13
13 IF1
1
5
14 IA1
7 IA2
3 1P
2 1B
14 1H
2 1H
W–B
B
1
G–R
15A
AM2
1
P–B
1
GR
2
B–Y
B
1
EFI
Relay
G–W
17 B
4 B
MREL
+B2
+B
BR
B–R
1 1E
STA ODMS
NSW
30 A
12 A 6 B
E03 E01 E02
4 D 7 C 6 C
E1
3 C
EC
22 A
B–R
2 A 1 A
BR
BR
BR
B–Y
B
BR
B–R
11 IF2
BR
B–Y
STP
E 3(A), E 4(B), E 5(C), E 6(D)
Engine Control Module
7 1P
6
8 1H
TC
BR
11 1A
N
8 A
BATT
BR
P
3 A
G–B
W–B
A3
Park/Neutral
Position SW
9
1
B–Y
B–L
1
P–B
3
GR
2
B
IF2
B–Y
4
1
BR
1
3
A7
O/D Main SW
W–B
BR
F8
Fusible Link
Block
60A MAIN
2
15 IF1
4
13
1P
W–B
BR
17 1P
2 1O
BR
EB
W–B
W–B
Battery
IE
98
SCION xB (EM0091U)
ED
EC
IG
B–R
B–R
S3
Skid Control ECU with Actuator
CANL
CANH
25
11
SP1
W
B
W–R
12
12 IA2
1 IA2
13 IA1
W
B
B
A
W–R
W
B
B
A
G–W
G–R
J5
Junction
Connector
B
T2
Turbine
Speed Sensor
A
2
R–Y
R–W
W
33 B
34 B
NT–
CANH
G–R
R–W
B
27 D
NT+
R–Y
B
35 D
G–W
R
1
9 B
10 B
21 B
11 B
L
2
D
R
CANL
E 3(A), E 4(B), E 5(C), E 6(D)
Engine Control Module
1
3
ODLP
8 B
14 B
G–O
32 C
OT
BR
O
2
VC
VTA
E2
O
2
T1
Throttle
Position Sensor
1
3 1H
6 1F
BR
E2
6
BR
E1
Electronically Controlled
Transmission Solenoid
SPD
THW
20 C
1
SL
LG
GR
G
Y
B
W
VTA
18 C
V–W
Y–G
4
SLT–
VC
28 C
E2
Engine Coolant
Temp. Sensor
8
SLT+
E2
THO1
24 D
R–L
3
ST
SL
11 D
Y–R
2
S2
SLT–
13 D
R–W
10
S1
W–L
B–R
W–R
5
SLT+
12 D
G
ST
19 D
W
S2
8 D
W–G
S1
9 D
G–O
BR
BR
V–W
99
SCION xB (EM0091U)
ECT and A/T Indicator
B–R
R–B
(IG)
A3
A/T Indicator Light SW
3
10A
GAUGE
RB
2L
LL
7
4
8
IF1
6
IF1
5
R–B
G
GR
7
IF1
IF1
9
G–W
R
8
G–R
IF1
R–Y
19
R–W
IF1
16
GR
R
W–R
5 1E
13 1G
R–B
DL
5
G–W
NL
2
R–Y
RL
1
R–W
PL
IF1
R–B
G–W
G–R
R–Y
R–Y
G–R
G–R
G–W
G–W
9 1E
16 1H
2 1E
6 1H
4 1E
4 1H
3 1E
J 6(A), J 7(B)
Junction
Connector
R
R–W
R–W
R–Y
E B
13 1H
E A
1 1G
R–B
11
23
Speedometer
G–W
10
L
G–R
9
2
R–Y
8
D
GR
7
N
R–W
6
R
28
P
40
O/D OFF
R
18 1G
W–R
17 1G
B–R
16 1G
CPU
BR
29
V–W
21
G–O
C6
Combination Meter
12
G–O
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
V–W
V–W
IF
100
SCION xB (EM0091U)
D A (∗1)
D B (∗2)
J 4(A), (B)
Junction
Connector
D A (∗1)
D B (∗2)
System Outline
Previous automatic transaxle have selected each gear shift using the mechanically controlled throttle hydraulic pressure,
governor hydraulic pressure and lock–up hydraulic pressure. The electronically controlled transmission, however, electrically
controls the line pressure and lock–up pressure etc., through the solenoid valve. Engine control module controls each
solenoid valve based on the input signals from each sensor, which makes smooth driving possible by shift selection for each
gear that is most appropriate to the driving conditions at that time.
1. Gear Shift Operation
During driving, the engine control module selects the shift for each gear which is most appropriate to the driving conditions,
based on input signals from the engine coolant temp. sensor to TERMINAL THW of the engine control module, and also the
input signals to TERMINAL NT+ of the engine control module from the turbine speed sensor devoted to the direct clutch.
Current is then output to the electronically controlled transmission solenoid. When shifting to 1st gear, current flows from
TERMINAL S1 of the engine control module to TERMINAL 5 of the electronically controlled transmission solenoid to
GROUND, and from TERMINAL S2 of the engine control module to TERMINAL 10 of the electronically controlled
transmission solenoid to GROUND, and continuity to solenoids No.1 and No.2 causes the shift.
For the 2nd gear, current flows from TERMINAL S1 of the engine control module to TERMINAL 5 of the electronically
controlled transmission solenoid to GROUND, and continuity to the solenoid No.1 causes the shift.
For the 3rd gear, there is no continuity to either No.1 or No.2 solenoid.
Shifting into 4th gear (Overdrive) takes place when current flows from TERMINAL S2 of the engine control module to
TERMINAL 10 of the electronically controlled transmission solenoid to GROUND, and continuity to the solenoid No.2 causes
the shift.
2. Lock–Up Operation
When the engine control module judges from each signal that lock–up operation conditions have been met, current flows
from TERMINAL SL of the engine control module to TERMINAL 4 of the electronically controlled transmission solenoid to
GROUND, causing continuity to the lock–up solenoid and causing lock–up operation.
3. Clutch Pressure Control
The electronically controlled transmission solenoid is controlled by the current from TERMINAL SL of the engine control
module, and controls the accumulator hydraulic pressure.
As a result, the clutch to hydraulic pressure is adjusted precisely, and allows stable shift change.
4. Line Pressure Control
The electronically controlled transmission solenoid is controlled by the current from TERMINAL SLT+ of the engine control
module, and controls the throttle hydraulic pressure.
As a result, the line pressure can be controlled precisely, and the to hydraulic pressure is adjusted according to the shift
change condition, and allows smooth shift change.
5. Shifting Control in Uphill/Downhill Traveling
This system determines whether the vehicle is traveling on an incline or decline from the throttle opening angle, vehicle
acceleration condition and brake pedal operation, and controls the shift up to O/D to allow smooth driving.
6. Clutch to Clutch Control
When shifting from the 3rd gear to the 4th gear, the current from the engine control module TERMINAL ST controls the
electronically controlled transmission solenoid, to control the drain orifice hydraulic pressure (Switch orifice). The
electronically controlled transmission solenoid is also controlled by the current from the engine control module TERMINAL
SLT+, to adjust the hydraulic pressure precisely, which ensures smooth shifting.
7. Stop Light SW Circuit
If the brake pedal is depressed (Stop light SW on) when driving in lock–up condition, a signal is input to TERMINAL STP of
the engine control module, the engine control module operates and continuity to the lock–up solenoid is cut.
8. Overdrive Circuit
∗ Overdrive on
When the engine is turned on from ignition off, the engine control module turns the O/D on. When the O/D main SW is
pushed while the O/D is off, a signal is input into TERMINAL ODMS of the engine control module, and the O/D is turned
on by the engine control module. In this case, the engine control module controls the gear shift according to the vehicle’s
driving condition, using the O/D range. At this time, the O/D off indicator light is off.
∗ Overdrive off
When the O/D main SW is pushed while the O/D is on, a signal is input into TERMINAL ODMS of the engine control
module, and the O/D is turned off. At this time, the current flows through the O/D off indicator light to TERMINAL ODLP of
the engine control module. As a result, the O/D off indicator light turns on, and the engine control module controls the gear
shift according to the vehicle’s driving condition, without using the O/D range.
101
SCION xB (EM0091U)
ECT and A/T Indicator
: Parts Location
Code
See Page
Code
See Page
A3
28
E4
B
30
Code
See Page
J5
31
A7
30
E5
C
30
J6
A
31
C6
30
E6
D
30
J7
B
31
D1
30
F8
28
S3
29
E1
28
I10
30
S8
31
E2
28
A
31
T1
29
B
31
T2
29
E3
A
J4
30
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
1B
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1E
1F
1G
1H
1O
1P
: Connector Joining Wire Harness and Wire Harness
Code
IA1
IA2
IF1
IF2
See Page
Joining Wire Harness and Wire Harness (Connector Location)
35
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
35
Engine Wire and Instrument Panel Wire (Behind the Glove Box)
: Ground Points
Code
EB
See Page
Ground Points Location
34
Front Left Fender Apron
34
Engine Block
IE
35
Left Kick Panel
IF
35
Instrument Panel Brace LH
IG
35
Right Kick Panel
EC
ED
102
SCION xB (EM0091U)
Memo
103
SCION xB (EM0091U)
ABS, TRAC and VSC
B
R–B
B
IG2 6
A3
A/T Indicator
Light SW
5 AM2
ST2
3
P
1
R
I10
Ignition SW
W–R
R
16
R
2
2
2
E B
2
1 1O
1
3
3
W–R
E A
R
ABS CUT
Relay
B
7 1A
1
ABS MTR
Relay
5
5
2
J 6(A), J 7(B)
Junction
Connector
R
B
IF1
2
20 IA2
B–R
R
B
R
B
2
15
2
45
31
40
2
MR
MRF
BM
R+
P
+BS
S3
Skid Control ECU with Actuator
GND2
1
CSW
PKB
43
IND
28
34
SP1
12
B
13 IA1
B
W–R
W–R
W–L
9 IA1
5
P3
Parking Brake SW
W–L
T3
TRAC OFF SW
120A ALT
16 IA2
5
F8
Fusible Link Block
4
60A ABS
3
60A MAIN
B
1
B–L
1
GND1
32
B–R
1
W–B
1
14
W–B
15A AM2
40A ABS NO. 1
2
2
L
1
B–W
1
2
B–W
2
1
2
W–R
W–B
Battery
W–B
B–R
W–B
W–B
EB
IG
104
SCION xB (EM0091U)
W–B
B
B
9
IF1
R–B
R–B
R–B
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
1
LG–B
LG–R
5
19
RL–
RR+
34
B
W
B
6 IA2
18
4
3
17
FL–
FR+
V
B
6
CANL
33
W
BR
Y
20
CANH
7
1
BR–Y
2 IE1
NEO
V
2
G
LG–R
5 IE1
B
3 IE1
Y
7 IE1
RL+
2
1
LG–B
1
A5
ABS Speed Sensor
Front RH
2
R
2
A4
ABS Speed Sensor
Front LH
A16
ABS Speed Sensor
Rear RH
A15
ABS Speed Sensor
Rear LH
E4
Engine Control Module
RR–
FL+
10
FR–
NEO
22 IA2
W
B
R
B–L
G–W
R–W
W
J 4(A), (B)
Junction
Connector
E A (∗1)
E B (∗2)
W
IG1
46
12 IA2
9 IA2
STP
27
1 IA2
10 1P
R
R–L
E A (∗1)
E B (∗2)
BZ
30
B–L
25
G–W
11
R–W
WT
R–W
36
BR–W
9 1B
WA
W
CANL
35
R–Y
BRL
B
CANH
29
P
R–L
5 1B
5 1P
VSCW
44
TS
24
R
WFSE
42
W
D/G
13
B–W
S3
Skid Control ECU with Actuator
7
15
12
SIL
WFSE
TS
W
W
B
B
B
14
CANL
BR–W
6
CANH
R–Y
P
D1
Data Link Connector 3
B–W
W–R
W–R
B–R
B–R
W–B
W–B
105
SCION xB (EM0091U)
ABS, TRAC and VSC
B
B
R–B
R–B
(IG)
(BAT)
7. 5A
ECU–IG
10A
STOP
8 1B
11 1H
6 1R
B–L
W–R
7. 5A
ECU–B
G–Y
B–L
3 1B
(BAT)
B–L
W
G–R
B
B–L
B–L
3
5
3
2
BAT
CANL
CANH
IG
B
A
B
B
A
A
B
W
J5
Junction
Connector
Y1
Yaw Rate
Sensor
W–B
W
A
W–B
B
A
W–B
W
B
W–B
B
1
B
GND
10
B
CANH
9
B
CANL
W
R–W
ESS
2
W
R–W
G–W
1 1B
G–W
IG
W–B
Buzzer
1
B–L
S7
Steering
Sensor
4 IE1
2
V2
VSC Buzzer
2 1B
1
7 IB1
B
B–L
1
14 IB1
W–R
B–L
S8
Stop Light SW
2
W
B
W
W
6 BA1
6 BB1
B
B
BR–W
BR–W
R–Y
R–Y
P
P
B–W
B–W
W–R
W–R
B–R
B–R
BH
106
SCION xB (EM0091U)
BK
W–B
W–B
W–B
W–B
BI
B
(IG)
R–B
(BAT)
15A
DOME
10A
GAUGE
2
1
13 1G
L–Y
R–B
B
5 1E
4 1A
R–B
6 1O
12 1G
L–Y
B–R
8 1G
C6
Combination Meter
1
Speedometer
Slip
Brake
23
ABS
VSC
TRAC OFF
40
P
5
28
21
BR
R–Y
38
W–R
37
B–R
19
B–W
4
BR–W
CPU
3 1G
5 IA1
R–Y
P
10 IA2
B–R
21 IA2
B–W
11 IA2
BR–W
1 1A
BR–W
R–Y
P
B–W
W–R
BR
B–R
IF
107
SCION xB (EM0091U)
ABS, TRAC and VSC
System Outline
1. ABS Operation
If the brake pedal is depressed suddenly, the ABS controls the hydraulic pressure of the wheel cylinders for all the four
wheels to automatically avoid wheel locking and ensure the directional and steering stability of the vehicle. If the brake pedal
is depressed suddenly, the skid control ECU with actuator controls the solenoids in the actuators using the signals from the
sensors to move the brake fluid to the reservoir in order to release the braking pressure applied to the wheel cylinder. If the
skid control ECU with actuator detects that the fluid pressure in the wheel cylinder is insufficient, the skid control ECU with
actuator controls the solenoids in the actuators to increase the braking pressure.
2. Traction Control Operation
The traction control system controls the engine torque, the hydraulic pressure of the driving wheel cylinders, slipping of the
wheels which may occur at start or acceleration of the vehicle, to ensure an optimal driving power and vehicle stability
corresponding to the road conditions.
3. VSC Operation
Unexpected road conditions, vehicle speed, emergency situation, and any other external factors may cause large under– or
over–steering of the vehicle. If this occurs, the VSC system automatically controls the engine power and wheel brakes to
reduce the under– or over–steering.
To reduce large over–steering :
If the VSC system determines that the over–steering is large, it activates the brakes for the outer turning wheels depending
on the degree of the over–steering to produce the moment toward the outside of the vehicle and reduce the over–steering.
To reduce large under–steering :
If the VSC system determines that the under–steering is large, it controls the engine power and activates the rear wheel
brakes to reduce the under–steering.
TRAC OFF SW
The traction control SW is used to stop the TRAC function. After the engine is started, the TRAC system is stopped (turned
off) and the TRAC OFF indicator light lights up. When the TRAC OFF SW is pressed again, the TRAC system enters the
stand–by mode. If the engine is stopped and restarted, the TRAC system enters the stand–by mode regardless of the
traction control SW.
VSC system cannot cut off by using TRAC OFF SW.
4. Mutual System Control
To efficiently operate the VSC system at its optimal level, the VSC system and other control systems are mutually controlled
while the VSC system is being operated.
Engine throttle control
The engine power does not interfere with the VSC brake control by controlling the opening of the throttle and reducing the
engine output.
Engine control and electronically controlled transmission control
The strong braking force does not interfere with the braking force control of the VSC system by turning off the accel. and
reducing changes in the driving torque at shift–down.
VSC system operation indication
The Slip indicator light flashes and the buzzer sounds intermittently to warn the driver that the current road is slippery, while
the VSC system is being operated.
5. Fail Safe Function
If an error occurs in the skid control ECU with actuator, sensor signals, and/or actuators, the skid control ECU with actuator
inhibits the brake actuator control and inputs the error signal to the engine control module. According to the error signal, the
brake actuator turns off the solenoid and the engine control module rejects any electronically controlled throttle open request
from the VSC system. As a result, the vehicle functions regardless of the ABS, TRAC, and VSC systems.
: Parts Location
Code
See Page
Code
See Page
Code
See Page
A3
28
F8
28
S3
29
A4
28
I10
30
S7
31
A5
28
A
31
S8
31
A15
32
B
31
T3
31
A16
32
31
V2
31
C6
30
J6
A
31
Y1
31
D1
30
J7
B
31
E4
30
J4
J5
P3
31
108
SCION xB (EM0091U)
: Relay Blocks
Code
See Page
Relay Blocks (Relay Block Location)
1
22
Engine Room R/B (Engine Compartment Left)
2
23
ABS R/B (Engine Compartment Right)
: Junction Block and Wire Harness Connector
Code
1A
1B
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1E
1G
1H
1O
1P
1R
: Connector Joining Wire Harness and Wire Harness
Code
IA1
See Page
Joining Wire Harness and Wire Harness (Connector Location)
35
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
IB1
35
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
IE1
35
Engine Room Main Wire and Floor Wire (Left Side of Cowl Panel)
IF1
35
Engine Wire and Instrument Panel Wire (Behind the Glove Box)
BA1
36
Rear Door No.1 LH Wire and Floor Wire (Center Pillar LH)
BB1
36
Rear Door No.1 RH Wire and Floor Wire (Center Pillar RH)
IA2
: Ground Points
Code
See Page
Ground Points Location
EB
34
Front Left Fender Apron
IF
35
Instrument Panel Brace LH
IG
35
Right Kick Panel
BH
36
Rear Door LH
BI
36
Rear Door RH
BK
36
Rear Quarter Panel Inner RH
109
SCION xB (EM0091U)
Multiplex Communication System – CAN
(BAT)
(IG)
(∗2)
W–R
F B
3 1B
B–L
11 1H
(∗1)
6 1R
B–L
7. 5A
ECU–IG
W–R
7. 5A
ECU–B
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
J 4(B)
Junction
Connector
3
B–L
(∗2)
W–R
A17
A/C Amplifier
1
14 IB1
4 IE1
W
B–L
CANH
2
5
CANL
W
9
B
8
B
B
A
B
A
A
B
B
A
B
A
A
B
3
J5
Junction
Connector
CANH
33
34
CANH
CANH
CANL
S3
Skid Control ECU
with Actuator
Y1
Yaw Rate Sensor
W–B
W
11
CANL
E4
Engine Control Module
W–B
B
B
B
W
25
W–B
D1
Data Link
Connector 3
6
CANH
W
CANL
B
W
14
1 IA2
BH
110
SCION xB (EM0091U)
W–B
6 BB1
W–B
W–B
6 BA1
IG
IG
GND
1
12 IA2
CANL
W–B
10
W
CANH
9
B
CANL
W
ESS
2
7 IB1
B
IG
W–B
BAT
S7
Steering Sensor
(∗1)
W–R
F B
BK
BI
System Outline
Multiplex communication system (CAN) uses a serial communication protocol and communicates with a differential voltage.
In this network system, TERMINALS CANH and CANL are used for communication between the ECUs and sensors, and
excellent data communication speed and communication error detecting facility are provided.
This system is working for the following systems:
∗ ABS
∗ Air Conditioning
∗ Electronically Controlled Transmission and A/T Indicator
∗ Engine Control
∗ TRAC
∗ VSC
: Parts Location
Code
See Page
A17
30
D1
30
E4
30
Code
J4
See Page
B
Code
See Page
31
S7
31
J5
31
Y1
31
S3
29
: Junction Block and Wire Harness Connector
Code
1B
1H
1R
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IA2
35
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
IB1
35
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
IE1
35
Engine Room Main Wire and Floor Wire (Left Side of Cowl Panel)
BA1
36
Rear Door No.1 LH Wire and Floor Wire (Center Pillar LH)
BB1
36
Rear Door No.1 RH Wire and Floor Wire (Center Pillar RH)
: Ground Points
Code
See Page
Ground Points Location
IG
35
Right Kick Panel
BH
36
Rear Door LH
BI
36
Rear Door RH
BK
36
Rear Quarter Panel Inner RH
111
SCION xB (EM0091U)
Memo
112
SCION xB (EM0091U)
SRS (Before Dec. 2005 Production)
NOTICE: When inspecting or repairing the SRS, perform service in accordance with the following precautionary instructions
and the procedure, and precautions in the Repair Manual applicable for the model year.
D Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of information
when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.
D Work must be started more than 90 seconds after the ignition SW is turned to the ”OFF” position and the
negative (–) terminal cable is disconnected from the battery.
(The SRS is equipped with a back–up power source so that if work is started within 90 seconds from
disconnecting the negative (–) terminal cable of the battery, the SRS may deploy.)
D When the negative (–) terminal cable is disconnected from the battery, the memory of the clock and audio system will be
cleared. So before starting work, make a record of the contents in the audio memory system. When work is finished,
reset the audio systems as they were before and adjust the clock. Some vehicles have power tilt steering, power
telescopic steering, power seat and power outside rear view mirror which are all equipped with memory function.
However, it is not possible to make a record of these memory contents. So when the work is finished, it will be
necessary to explain it to your customer, and ask the customer to adjust the features and reset the memory. To avoid
erasing the memory in each system, never use a back–up power supply from outside the vehicle.
D Before repair, remove the airbag sensor if shocks are likely to be applied to the sensor during repair.
D Do not expose the following parts directly to hot air or flame;
D Even in cases of a minor collision where the SRS does not deploy, the following parts should be inspected;
D Never use SRS parts from another vehicle. When replacing parts, replace with new parts.
D For the purpose of reuse, never disassemble and repair the following parts.
D If the following parts have been dropped, or have cracks, dents and other defects in their case, bracket, and connector,
replace with new one.
D Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting electrical circuits of the system.
D Information labels are attached to the periphery of the SRS components. Follow the instructions of the notice.
D After work on the SRS is completed, check the SRS warning light.
D If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair
Manual.
∗
∗
∗
∗
∗
Steering wheel pad
Front passenger airbag assembly
Seat belt pretensioner
Center airbag sensor assembly
Front airbag sensor assembly
113
SCION xB (EM0091U)
SRS (Before Dec. 2005 Production)
(IG)
(BAT)
10A
GAUGE
5 AM2
15A
DOME
IG2 6
2
ST2
23
1
5 1D
7 1A
4 1A
SRS
6 1O
1 1O
L–Y
L–Y
B
I10
Ignition SW
1
R–B
W–R
13 1G
12 1G
8 1G
40
21
L–Y
34
BR
2
B–Y
1
C6
Combination Meter
B–R
B–O
W–R
CPU
15A
AM2
B–O
7 1G
1
1
B–L
B–Y
8 1D
5 B
F8
Fusible Link Block
3
LA
17 B
2 1O
D2–
10 B
11 B
8 B
7 B
1
2
4
3
1
D2+
D2–
P2+
P2–
2
3
4
P2+
P2–
B8
Buckle SW RH
2
D2+
Y–P
P–
16 B
Y–GR
3 1D
P+
13 B
Y–G
B
2 1D
D+
D–
14 B
Y–R
W–B
RBE+
Y–O
8 C
W–B
RBE–
Y–V
12 C
Y
E1
27 B
Y–B
E2
28 B
W–B
A 9(A), A10(B), A11(C)
Airbag Sensor Assembly
Battery
60A MAIN
3 B
IG2
IF
D+
D–
P+
P–
W–B
BR
W–B
1
IE
A13
Airbag Squib
(Steering Wheel Pad)
114
SCION xB (EM0091U)
A12
Airbag Squib (Front Passenger' s
Airbag Assembly)
Combination
Meter
W–R
D1
Data Link
Connector 3
E4
Engine Control
Module
B7
Buckle SW LH
Seat Position Sensor
3
F/PS
TC
SIL
Seat Position
Sensor
W
B
7
P–B
13
32
3 1P
5 1P
10 1H
4 1D
1 1D
9 1D
GSW2
R–B
22 B
SIL
1
G–W
B
12 B
TC
2
LG–B
W
19 B
5
L–Y
P–B
4
3 A
8 A
11 A
7 A
LSP+
LSP–
LBE+
LBE–
A 9(A), A10(B), A11(C)
Airbag Sensor Assembly
P13
Pretensioner LH
P14
Pretensioner RH
B–W
BR–W
4 IA3
3 IA3
2 IA3
1 IA3
B–W
BR–W
2
–SR
20 B
BR
1
+SR
9 B
BR
2
–SL
26 B
W–R
1
+SL
15 B
W–R
Y
PR–
6 C
Y–B
PR+
5 C
Y
PL–
1 A
Y–B
PL+
2 A
2
1
2
1
F1
Front Airbag
Sensor LH
F2
Front Airbag
Sensor RH
115
SCION xB (EM0091U)
SRS (Before Dec. 2005 Production)
System Outline
The SRS is a driver and front passenger protection device which has a supplemental role to the seat belts.
When the ignition SW is turned to ON, the current from the ignition SW flows to TERMINAL (B) 5 of the airbag sensor
assembly.
If an accident occurs while driving, when the frontal impact exceeds a set level, the current from the ignition SW flows to
TERMINALS (B) 14, (B) 16, (B) 10, (B) 8, (A) 2 and (C) 5 of the airbag sensor assembly to the airbag squibs and the
pretensioners to TERMINALS (B) 13, (B) 17, (B) 11, (B) 7, (A) 1 and (C) 6 of the airbag sensor assembly to TERMINAL (B)
27, (B) 28 or BODY GROUND to GROUND, so that current flows to the airbag squibs and the pretensioners and causes
them to operate.
The airbag stored inside the steering wheel pad is instantaneously expanded to soften the shock to the driver.
The airbag stored inside the passenger’s instrument panel is instantaneously expanded to soften the shock to the front
passenger.
The pretensioners make sure of the seat belt restrainability.
: Parts Location
Code
See Page
Code
See Page
Code
See Page
A9
A
30
B8
32
F8
28
A10
B
30
C6
30
I10
30
A11
C
30
D1
30
P13
33
A12
30
E4
30
P14
33
A13
30
F1
28
B7
32
F2
28
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1D
1G
1H
1O
1P
: Connector Joining Wire Harness and Wire Harness
Code
IA3
See Page
35
Joining Wire Harness and Wire Harness (Connector Location)
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
: Ground Points
Code
See Page
Ground Points Location
IE
35
Left Kick Panel
IF
35
Instrument Panel Brace LH
116
SCION xB (EM0091U)
SRS (From Dec. 2005 Production)
NOTICE: When inspecting or repairing the SRS, perform service in accordance with the following precautionary instructions
and the procedure, and precautions in the Repair Manual applicable for the model year.
D Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of information
when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.
D Work must be started more than 90 seconds after the ignition SW is turned to the ”OFF” position and the
negative (–) terminal cable is disconnected from the battery.
(The SRS is equipped with a back–up power source so that if work is started within 90 seconds from
disconnecting the negative (–) terminal cable of the battery, the SRS may deploy.)
D When the negative (–) terminal cable is disconnected from the battery, the memory of the clock and audio system will be
cleared. So before starting work, make a record of the contents in the audio memory system. When work is finished,
reset the audio systems as they were before and adjust the clock. Some vehicles have power tilt steering, power
telescopic steering, power seat and power outside rear view mirror which are all equipped with memory function.
However, it is not possible to make a record of these memory contents. So when the work is finished, it will be
necessary to explain it to your customer, and ask the customer to adjust the features and reset the memory. To avoid
erasing the memory in each system, never use a back–up power supply from outside the vehicle.
D Before repair, remove the airbag sensor if shocks are likely to be applied to the sensor during repair.
D Do not expose the following parts directly to hot air or flame;
D Even in cases of a minor collision where the SRS does not deploy, the following parts should be inspected;
D Never use SRS parts from another vehicle. When replacing parts, replace with new parts.
D For the purpose of reuse, never disassemble and repair the following parts.
D If the following parts have been dropped, or have cracks, dents and other defects in their case, bracket, and connector,
replace with new one.
D Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting electrical circuits of the system.
D Information labels are attached to the periphery of the SRS components. Follow the instructions of the notice.
D After work on the SRS is completed, check the SRS warning light.
D If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair
Manual.
∗
∗
∗
∗
∗
Steering wheel pad
Front passenger airbag assembly
Seat belt pretensioner
Center airbag sensor assembly
Front airbag sensor assembly
117
SCION xB (EM0091U)
SRS (From Dec. 2005 Production)
B
(IG)
B
(BAT)
5 AM2
IG2 6
ST2
10A
GAUGE
15A
DOME
13 IB1
B
B
W–R
2
I10
Ignition SW
13 1G
1
3 1L
R–B
L–Y
R–B
R–B
G–W
1 1O
O
4 1A
6 1O
23
35
33
5 1D
8 1G
B–O
B–R
12 1G
SRS
7 1A
W–R
L–Y
1
15A
AM2
40
21
BR
1
2
B–R
C6
Combination Meter
CPU
34
1
B–Y
1
B–L
7 1G
8 1D
B–Y
F8
Fusible Link Block
60A MAIN
3
21 B
14 B
LA
IG2
D–
P+
P–
6 B
8 B
D2+
7 B
D2–
4 B
3 B
1 B
P2+
2 B
P2–
1
1
D2–
P+
Y–P
Y–R
3
D2+
Y–GR
Y–O
4
D–
Y–G
Y–V
2
2
3
4
P2+
P2–
P–
BR
D+
Y
Battery
D+
5 B
Y–B
A19(A), A20(B), A21(C)
Airbag Sensor Assembly
IF
A13
Airbag Squib
(Steering Wheel Pad)
A12
Airbag Squib (Front Passenger' s
Airbag Assembly)
118
SCION xB (EM0091U)
B
B
R–B
G–W
C B
O
J 4(B)
Junction
Connector
R–B
C B
W
P15
Passenger Seat Belt
Warning Lamp
2
D1
Data Link
Connector 3
B
E4
Engine Control
Module
Passenger' s Seat Belt/
Airbag Indicator (ON/OFF)
3
32
3 1P
5 1P
4 1D
1 1D
12 1H
10 1H
PAON
W
B
23 B
P–AB
9 1D
P–B
17 B
PBEW
F/PS
SIL
7
GR
R
O
13 B
TC
13
B
PAON
W
6
P–B
P–AB
G–W
IND
1
15 B
16 B
22 B
TC
SIL
GSW2
A19(A), A20(B), A21(C)
Airbag Sensor Assembly
PP–
5 C
Y
PP+
4 C
Y–B
3 1D
PD–
1 A
Y
2 1D
PD+
2 A
Y–B
W–B
E1
25 B
W–B
E2
26 B
1
2
1
2
W–B
2 1O
IE
P13
Pretensioner LH
P14
Pretensioner RH
119
SCION xB (EM0091U)
SRS (From Dec. 2005 Production)
B
O 5(A), O 6(B)
Occupant Classification ECU
Y
FSR–
GND
DIA
2 A
3 A
11 IB1
5 IB1
BGND
5 A
W–R
6 1R
BSW
9 A
P
4 A
GR
FSR+
O
8 A
W–B
+B
1 A
W
IG
7 A
B
7. 5A
ECU–B
W–R
(BAT)
6 IB1
F B
J 4(B)
Junction
Connector
W–R
1
2
RBE+
RBE–
W–B
W
F B
W
11 1K
B9
Buckle SW LH
Seat Position Sensor
2 1O
14 A
13 A
11 A
12 A
DSP+
DSP–
DBE+
DBE–
E
4
12 C
W–B
2
R–B
LBE–
3
G–W
LBE+
6
LG–B
LSP–
1
L–Y
LSP+
13 C
FSP+
FSP–
A19(A), A20(B), A21(C)
Airbag Sensor Assembly
–SL
+SR
–SR
B
W
B
4 IA3
3 IA3
2 IA3
1 IA3
B
W
B
27 B
W
29 B
W
28 B
2
1
2
1
F16
Front Airbag
Sensor LH
F17
Front Airbag
Sensor RH
W–B
+SL
30 B
BK
120
SCION xB (EM0091U)
IE
B10
Buckle SW RH
O 5(A), O 6(B)
Occupant Classification ECU
BR
SGD4
4 B
R
SIG4
10 B
V
SVC4
6 B
O
SGD2
2 B
L
SIG2
8 B
W
SVC2
12 B
W
SGD3
3 B
Y
SIG3
9 B
GR
SVC3
5 B
G
SGD1
1 B
SB
SIG1
7 B
R
SVC1
11 B
1
2
3
1
2
3
1
2
3
1
2
3
SVC1
SIG1
SGD1
SVC3
SIG3
SGD3
SVC2
SIG2
SGD2
SVC4
SIG4
SGD4
O7
Occupant Classification
Sensor Front LH
O9
Occupant Classification
Sensor Rear LH
O8
Occupant Classification
Sensor Front RH
O10
Occupant Classification
Sensor Rear RH
121
SCION xB (EM0091U)
SRS (From Dec. 2005 Production)
System Outline
∗ The system reaches an ignition judgment to deploy the following device based on the signals received from the front
airbag sensor and deceleration sensor.
– Driver Airbag
– Front Passenger Airbag
– Seat Belt Pretensioner
∗ The dual–stage SRS airbag system has been used for the driver and front passenger airbags. This system controls the
optimal airbag inflation by judging the extent of impact, seat position (driver seat), whether or not the seat belt is fastened
(driver seat) and information from the front passenger occupant classification system.
∗ The front passenger occupant classification system judges whether the front passenger seat is occupied by an adult or
child (with child seat) or is unoccupied, according to the load applied to the front passenger seat and whether the seat belt
is buckled. Based on the results, it restricts the deployment of the front passenger airbag, front passenger side airbag, and
front passenger seat belt pretensioner. In addition, the system informs the driver of the result of the judgment through the
use of the AIRBAG ON/OFF indicator lights.
∗ The airbag sensor assembly transmits a signal to the engine control module in order to stop the fuel pump when the
airbag is deployed.
: Parts Location
Code
See Page
A12
A13
Code
See Page
30
D1
30
Code
O6
See Page
B
33
30
E4
30
O7
33
A19
A
30
F8
28
O8
33
A20
B
30
F16
28
O9
33
A21
C
30
F17
28
O10
33
B9
32
30
P13
33
B10
32
J4
I10
B
31
P14
33
C6
30
O5
A
33
P15
31
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1D
1G
1H
1K
1L
1O
1P
1R
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IA3
35
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
IB1
35
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
: Ground Points
Code
See Page
Ground Points Location
IE
35
Left Kick Panel
IF
35
Instrument Panel Brace LH
BK
36
Rear Quarter Panel Inner RH
122
SCION xB (EM0091U)
Memo
123
SCION xB (EM0091U)
SYSTEM CIRCUITS H
2006 xB
ELECTRICAL WIRING DIAGRAM
SYSTEM CIRCUITS
ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back–Up Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cigarette Lighter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combination Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronically Controlled Transmission and A/T Indicator . . . . . . . . . . . . . .
Engine Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Wiper and Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Light Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multiplex Communication System (CAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PTC Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator Fan and Condenser Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Window Defogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Wiper and Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Control Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Belt Warning (Before Dec. 2005 Production) . . . . . . . . . . . . . . . . . . . . . .
Seat Belt Warning (From Dec. 2005 Production) . . . . . . . . . . . . . . . . . . . . . . .
Shift Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS (Before Dec. 2005 Production) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS (From Dec. 2005 Production) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stop Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TRAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal and Hazard Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Two Way Flow Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wireless Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page
104
164
146
72
46
140
150
82
98
48
60
74
58
142
42
66
64
126
138
110
38
78
162
156
144
76
136
128
130
124
113
117
42
70
66
104
62
158
104
90
37
SCION xB (EM0091U)
Battery
W–B
F8
Fusible Link Block
60A MAIN
2
2
2
B–Y
B–W
B–L
B–R
B–R
1
1
1
1
4
P
N
6
IF2
48
SCION xB (EM0091U)
1
2
1
3
B–Y
B–R
B
(M/T)
IF1
B–R
1
11 EA1
N1
Noise Filter
(Ignition)
B–R
W–B
B
13 IF1
B–R
B–R
15A
AM2
(M/T)
B–Y
7 1O
B–Y
B
3 1A
(M/T)
B
B–R
8 1G
B–Y
2
C5
Clutch Start SW
B
7 1H
(A/T)
1
B
5 1O
(A/T)
1
6 1O
(M/T)
1
B
7 1A
B–R
1 1O
B
I10
Ignition SW
B–R
B–R
B
(A/T)
1
B–R
ST2 4
(A/T)
B–R
B
A9
Park/Neutral Position SW
B–R
W–R
IG2 6
I9
Injector No. 4
I8
Injector No. 3
I7
Injector No. 2
I6
Injector No. 1
W–R
5 AM2
B–Y
2
B–O
B–L
Engine Control
B–R
(BAT)
15A
EFI
B–Y
2
1
GR
6 1E
B–Y
1
B–Y
5
EFI
Relay
15 EA1
1
1
B–Y
2
12 EA1
9
1
11
IF2
B–Y
3
B(A/T)
B(A/T)
B–L
B–W
B–Y
B–O
B–R
B–R
EB
B–R
B–R
20
IF1
B
B
B
BR
BR
BR
BR
BR
1
1
5
B
B
B
B
BR
4
EA1
B–Y
BR
E2G
VG
3
2
4
2
3
Y
Y–B
V
P
VC
VOUT
M1
Mass Air Flow Meter
THA
1
VTA
VC
E2
R–W
+B
3
7 IA2
8 1H
GND
R–W
11 1A
14 IA1
E2
Y–R
B–R
B–R
2
T1
Throttle Position
Sensor
B–Y
GR
B–Y
B–Y
P1
Power Steering
Oil Pressure Sensor
GR
GR
B–Y
1
10
IF1
C/OPN
Relay
3
2 A
1 A
2
3 A
+B2
+B
6 1T
R–W
5
B–R
B–R
R–W
BATT
8 A
20 C
W–B
18 C
VTA1
MREL
29 D
32 D
VC
30 D
THA
PSP
28 D
E2G
VG
9 1H
B–R
G–R
Y
IGT2
16 C
G–B
B–O
IGF
23 C
B–Y
IGT1
17 C
B–W
IGSW
9 A
B–L
# 10
6 D
Y
Y
B–L
2
1
4
Y
3
2
1
4
W–B
B(A/T)
3
B–R
B–Y
I3
Ignition Coil and
Igniter No. 2
Y
I2
Ignition Coil and
Igniter No. 1
5
# 20
5 D
W–B
M
# 30
2 D
B–R
4
# 40
1 D
B(A/T)
1
NSW
30 A
W–B
B–R
STA
12 A
B–Y
G–R
FC
25 A
F14
Fuel Pump
N3
Noise Filter (Fuel Pump)
B–R
E 3(A), E 4(B), E 5(C), E 6(D)
Engine Control Module
B–W
W–B
W–B
B–Y
W
W–B
B–O
B–R
B–R
B–R
B–R
W–B
B
W–B
B–R
BR
BJ
ED
ED
49
SCION xB (EM0091U)
Engine Control
B–R
B–R
10
IB1
B
BR
BR
BR
B
C10
Canister Pump Module
9
7
Canister Pressure
Sensor
IF2
Leak Detection Pump
Vent Valve
BR
BR
+B
BR
M
1
2 IB1
3 IB1
3
+B
GND
1
8
P
8 IB1
1 IB1
R–W
W–B
4
IB1
W–B
32 C
28 C
THW
P
8
IF2
V
R–W
R
BR
V
BR
9 IB1
2
R–L
GND
6
W–B
VCC
4
R–W
VOUT
R
E2
Engine Coolant
Temp. Sensor
SGND
2
31 A
6 A
5 A
MPMP
VPMP
PTMK
E2
E 3(A), E 4(B), E 5(C), E 6(D)
Engine Control Module
HT1B
1
4
2
2
3
2
4
BR
L
2
L
IF2
1
3
HT
OX
+B
E1
2
(∗1)
IF2
4
BR
4
9
B–R
1
B
E1
BR
+B
B
OX
OX1B
25 C
W
BR
2 C
(∗1)
E1
3 C
(∗1)
W
3
HT
B
GND
1
W–B
VISC
B–R
1
DUTY
B–R
V1
VSV (Purge)
1
I1
Idle Air Control Valve
Y
2
W–B
I5
Ignition Coil and
Igniter No. 4
Y
3
OX1A
21 C
B–R
I4
Ignition Coil and
Igniter No. 3
2
1 C
B–R
Y
3
HT1A
5 C
W–G
G–Y
G–O
Y
RSD
PRG
23 D
H7
Heated Oxygen Sensor
(Bank 1 Sensor 2)
W
IGT4
14 C
H3
Heated Oxygen Sensor
(Bank 1 Sensor 1)
IGT3
15 C
W–B
13
IF2
14
IF2
1
IF2
B
BR
B
(∗1)
W–B
B
B–R
BR
B
BR
BR
(∗1)
BR
BR
50
SCION xB (EM0091U)
BR
B–R
B–R
(BAT)
(BAT)
∗ 1 : Shielded
10A
STOP
10A
TAIL
A10
Airbag Sensor
Assembly
8 1B
4 1M
GSW2
G–Y
G
22
2
B
9 1D
G
2 1B
3
M
10 1H
9 1M
13 C
12 C
10 C
Y–R
B–Y
14 A
13 A
3 B
G–W
W–L
B
2 1H
G
3 1R
2
L
10
Fuse Block
FAN NO. 2
Relay
G–R
FAN NO. 1 Relay
1
Head
G1
Generator
R–B
Tail
1
R–Y
OFF
C2
Camshaft Timing
Oil Control Valve
T
S8
Stop Light SW
Light
Control SW
C8
Combination SW
+B
R–B
13
4 B
15 A
STP
ELS1
FANH
FANL
32 B
ELS2
OC1+
F/PS
OC1–
ALT
E 3(A), E 4(B), E 5(C), E 6(D)
Engine Control Module
7 C
NE+
27 C
NE–
G2+
34 C
26 C
W
E01
6 C
BR
E02
4 D
BR
E03
EKNK
30 C
BR
KNK1
2 EB1
B
1 EB1
O
B
BR
W
29 C
15
BR
BR
B
W
W
(∗1)
W
(∗1)
IF1
(∗1)
1
BR
2
2
C3
Crankshaft
Position Sensor
1
1
C1
Camshaft
Position Sensor
K1
Knock Sensor
(Bank 1)
2
BR
ED
BR
BR
BR
BR
(∗1)
BR
BR
EC
51
SCION xB (EM0091U)
Engine Control
B–R
B–R
W–R
V
W–R
(BAT)
S3
Skid Control ECU
with Actuator
10
NEO
12
7. 5A
OBD
SP1
CANH
CANL
11
25
V
W–R
W
B
4 1P
V–W
V–W
6 1F
V
3 1H
V–W
Y–B
Y–R
Y–B
6 IA2
7 B
8 B
18 B
29 B
SPD
COOL
33 B
HOT
CANH
W
NEO
B
Y–R
12 IA2
1 IA2
34 B
CANL
W
B
A
A
B
B
A
J5
Junction
Connector
B
BR
B
W
30 B
Y–G
TACH
1 B
B
TC
17 B
P–B
EC
22 A
W
E 3(A), E 4(B), E 5(C), E 6(D)
Engine Control Module
A A
A A
B
W–B
1 1E 14 1H
J 6(A), J 7(B)
Junction
Connector
BR
C B
Y–G
13
SG
TC
B
9
14
TAC
CANL
W–B
B
5
B
W
P–B
3 1P
BR
7 1P
6
CANH
D1
Data Link Connector 3
16
BAT
4
CG
17 1P
W–B
2 1O
IG
IE
52
SCION xB (EM0091U)
B–R
(IG)
W–R
(BAT)
10A
GAUGE
∗ 2 : From Dec. 2005 Production
∗ 3 : Before Dec. 2005 Production
15A
DOME
2
2
1
L–Y
R–B
W–R
13 1G
V–W
V–W
4 1A
13 IA1
Y–B
D A (∗3)
D B (∗2)
J 4(A), (B)
Junction
Connector
12 1G
Y–R
Y–R
Y–B
B–R
V–W
W–R
R–B
L–Y
D A (∗3)
D B (∗2)
3
2
40
29
28
23
1
CPU
30
C6
Combination Meter
B
21
BR
20
Y–G
Tachometer
Malfunction
Indicator Lamp
Water Temp. Cool
Water Temp. Hot
Speedometer
BR
B
IF
53
SCION xB (EM0091U)
Engine Control
System Outline
This system utilizes an engine control module and maintains overall control of the engine, transmission and so on. An outline
of the engine control is explained here.
1. Input Signals
(1) Engine coolant temp. signal circuit
The engine coolant temp. sensor detects the engine coolant temp. and has a built–in thermistor with a resistance which
varies according to the engine coolant temp. thus the engine coolant temp. is input in the form of a control signal into
TERMINAL THW of the engine control module.
(2) Intake air temp. signal circuit
The intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp., which is input as a
control signal into TERMINAL THA of the engine control module.
(3) Oxygen sensor signal circuit
The oxygen density in the exhaust gases is detected and input as a control signal into TERMINALS OX1A and OX1B of
the engine control module.
(4) RPM signal circuit
Camshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor.
Camshaft position is input as a control signal to TERMINAL G2+ of the engine control module, and engine RPM is input
into TERMINAL NE+.
(5) Throttle signal circuit
The throttle position sensor detects the throttle valve opening angle, which is input as a control signal into TERMINAL
VTA1 of the engine control module.
(6) Vehicle speed signal circuit
The vehicle speed sensor detects the vehicle speed, and the signal is input into TERMINAL SPD of the engine control
module via the combination meter, from TERMINAL SP1 of the skid control ECU with actuator.
(7) NSW signal circuit (A/T)
The Park/Neutral position SW detects whether the shift position are in neutral, parking or not, and inputs a control signal
into TERMINAL NSW of the engine control module.
(8) Battery signal circuit
Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on, the
voltage for engine control module start–up power supply is applied to TERMINALS +B and +B2 of the engine control
module via EFI relay.
(9) Starter signal circuit
To confirm whether the engine is cranking, the voltage applied to the starter motor during cranking is detected and the
signal is input into TERMINAL STA of the engine control module as a control signal.
(10) Engine knock signal circuit
Engine knocking is detected by knock sensor and the signal is input into TERMINAL KNK1 of the engine control module
as a control signal.
54
SCION xB (EM0091U)
2. Control System
∗ SFI system
The SFI system monitors the engine condition through the signals, which are input from each sensor to the engine
control module. The best fuel injection volume is decided based on this data and the program memorized by the engine
control module, and the control signal is output to TERMINALS #10, #20, #30 and #40 of the engine control module to
operate the injector. (Inject the fuel). The SFI system produces control of fuel injection operation by the engine control
module in response to the driving conditions.
∗ ESA system
The ESA system monitors the engine condition through the signals, which are input to the engine control module from
each sensor. The best ignition timing is detected according to this data and the memorized data in the engine control
module, and the control signal is output to TERMINALS IGT1, IGT2, IGT3 and IGT4. This signal controls the ignition coil
and igniter to provide the best ignition timing for the driving conditions.
∗ IAC system
The IAC system increases the RPM and provides idling stability for fast idle–up when the engine is cold and when the
idle speed has dropped due to electrical load, etc. The engine control module evaluates the signals from each sensor,
outputs current to TERMINAL RSD, and controls the idle air control valve.
∗ Fuel pump control system
The engine control module operation outputs to TERMINAL FC and controls the C/OPN relay. Thus controls the fuel
pump drive speed in response to conditions.
3. Diagnosis System
With the diagnosis system, when there is a malfunctioning in the engine control module signal system, the malfunction
system is recorded in the memory. The malfunctioning system can then be found by reading the display (Code) of the
malfunction indicator lamp.
4. Fail–Safe System
When a malfunction occurs in any system, if there is a possibility of engine trouble being caused by continued control based
on the signals from that system, the fail–safe system either controls the system by using data (Standard values) recorded in
the engine control module memory or else stops the engine.
: Parts Location
Code
See Page
Code
See Page
Code
See Page
A9
30
F8
28
A10
30
F14
32
C1
28
G1
28
C2
28
H3
28
J6
A
31
C3
28
H7
30
J7
B
31
C5
30
I1
29
K1
29
C6
30
I2
29
M1
29
C8
30
I3
29
N1
29
C10
32
I4
29
N3
33
D1
30
I5
29
P1
29
E2
28
I6
29
S3
29
J4
A
31
B
31
J5
31
E3
A
30
I7
29
S8
31
E4
B
30
I8
29
T1
29
E5
C
30
I9
29
V1
29
E6
D
30
I10
30
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
55
SCION xB (EM0091U)
Engine Control
: Junction Block and Wire Harness Connector
Code
1A
1B
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
1D
1E
1F
1G
1H
1M
1O
1P
1R
1T
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
EA1
34
Engine Wire and Engine Room Main Wire (Inside of Engine Room R/B)
EB1
34
Engine Wire and Sensor Wire (Near the Starter)
35
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
35
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
35
Engine Wire and Instrument Panel Wire (Behind the Glove Box)
IA1
IA2
IB1
IF1
IF2
: Ground Points
Code
EB
See Page
Ground Points Location
34
Front Left Fender Apron
34
Engine Block
IE
35
Left Kick Panel
IF
35
Instrument Panel Brace LH
IG
35
Right Kick Panel
BJ
36
Rear Quarter Panel Inner LH
EC
ED
56
SCION xB (EM0091U)
Memo
57
SCION xB (EM0091U)
Shift Lock
(IG)
(BAT)
10A
GAUGE
10A
STOP
8 1R
G–Y
8 1B
2
S8
Stop Light SW
G–R
R–B
1
2 1B
G–W
18 1P
3
IG
STP
S6
Shift Lock Control SW
P SW
5
SLS+
SLS–
E
W–B
B
L–R
1
1 1K
2 1O
W–B
Shift Lock
Solenoid
IE
124
SCION xB (EM0091U)
System Outline
The current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW.
When the ignition SW is turned to ON position, the current from the GAUGE fuse flows to TERMINAL 5 of the shift lock
control ECU.
Shift Lock Mechanism
With the ignition SW at ON position, when a signal that the brake pedal is depressed (Stop light SW on) and a signal that the
shift lever is put in P position (Continuity P SW) is input to the shift lock control SW, the shift lock control SW operates and
the current flows from TERMINAL 5 of the shift lock control SW to TERMINAL SLS+ to the shift lock solenoid to TERMINAL
SLS– of the shift lock control SW to TERMINAL 1 to GROUND. This causes the shift lock solenoid to turn on (Plate stopper
disengages) and the shift lever can shift into position other than P position.
: Parts Location
Code
See Page
S6
31
Code
S8
See Page
Code
See Page
31
: Junction Block and Wire Harness Connector
Code
1B
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1K
1O
1P
1R
: Ground Points
Code
IE
See Page
35
Ground Points Location
Left Kick Panel
125
SCION xB (EM0091U)
Key Reminder
(BAT)
(IG)
15A
DOME
10A
GAUGE
2
1
L–Y
13 1G
R–B
4 1A
L–Y
12 1G
1
23
C6
Combination Meter
Buzzer
CPU
Y
1 1S
19 1P
Y
1
2
U1
Unlock
Warning SW
R
1 1F
D5
Door Courtesy SW
Front LH
4 1G
BR
21
25
R
24
W–B
1
16 1P
IE
BR
W–B
2 1O
IF
126
SCION xB (EM0091U)
System Outline
Current is always applied from the DOME fuse to TERMINAL 1 of the combination meter. When the ignition SW is turned to
ON position, the current from the GAUGE fuse flows to TERMINAL 23 of the combination meter.
Key Reminder System
When the driver door is opened with the ignition SW off and ignition key remaining in the key cylinder (Unlock warning SW
on), a signal is input from the unlock warning SW to TERMINAL 25 of the combination meter, and from the door courtesy SW
front LH to TERMINAL 24 of the combination meter. As a result, the buzzer in the combination meter goes on and warns the
driver that the key is remaining in the key cylinder.
: Parts Location
Code
See Page
C6
30
Code
D5
See Page
32
Code
U1
See Page
31
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
1F
1G
1O
1P
1S
: Ground Points
Code
See Page
Ground Points Location
IE
35
Left Kick Panel
IF
35
Instrument Panel Brace LH
127
SCION xB (EM0091U)
Seat Belt Warning (Before Dec. 2005 Production)
(BAT)
(IG)
15A
DOME
10A
GAUGE
2
1
L–Y
13 1G
R–B
4 1A
L–Y
12 1G
23
C6
Combination Meter
Belt
1
Buzzer
32
21
35
W–R
BR
G–W
8 IB1
A 9(A), A10(B), A11(C)
Airbag Sensor Assembly
B
12 IB1
2
1
1
BR
W–B
1
R–B
3
W–B
3 1D
2 1O
Front Passenger
Seat Belt
Warning Light
W–B
3
RBE+
W–B
R–B
W–R
8 C
W–B
RBE–
W–R
12 C
B7
Buckle SW LH
7 A
B8
Buckle SW RH
Occupant Detection Sensor
E1
27 B
O
E2
28 B
2 1D
9
D
W–B
LBE–
D
IF
IE
128
SCION xB (EM0091U)
IG
I13
Integration Control and Panel
J6
Junction
Connector
33
O
CPU
System Outline
Current is always applied from the DOME fuse to TERMINAL 1 of the combination meter. When the ignition SW is turned to
ON position, the current from the GAUGE fuse flows to TERMINAL 23 of the combination meter.
Seat Belt Warning System
When the ignition SW turned on, a signal is input to the combination meter. To determine whether the driver has fastened the
seat belt, a signal is input from the buckle SW LH to TERMINAL 32 of the combination meter. When the seat belt is not
fastened, the seat belt warning light in the combination meter blinks, and emits a warning sound.
In addition, the front passenger is recognized by a sensor (Occupant detection sensor) is installed in the front passenger
seat, and determines whether the seat belt is fastened. When not fastened, the signals from the buckle SW RH is input to
TERMINAL 33 of the combination meter, and the front passenger seat belt warning light blinks.
: Parts Location
Code
A9
See Page
A
30
A10
B
A11
C
Code
See Page
Code
See Page
B7
32
I13
30
30
B8
32
J6
31
30
C6
30
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1D
1G
1O
: Connector Joining Wire Harness and Wire Harness
Code
IB1
See Page
35
Joining Wire Harness and Wire Harness (Connector Location)
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
: Ground Points
Code
See Page
Ground Points Location
IE
35
Left Kick Panel
IF
35
Instrument Panel Brace LH
IG
35
Right Kick Panel
129
SCION xB (EM0091U)
Seat Belt Warning (From Dec. 2005 Production)
B
(IG)
B
(BAT)
5 AM2
IG2 6
ST2
10A
GAUGE
15A
DOME
13 IB1
B
B
W–R
2
I10
Ignition SW
13 1G
1
3 1L
1 1O
G–W
4 1A
O
W–R
23
W–R
1
O
B–R
12 1G
G–W
8 1G
L–Y
7 1A
W–R
R–B
6 1O
R–B
L–Y
R–B
35
33
32
Belt
1
2
15A
AM2
C6
Combination Meter
CPU
1
B–L
1
21
BR
B–R
F8
Fusible Link Block
40
Battery
60A MAIN
3
Buzzer
IF
130
SCION xB (EM0091U)
B
B
R–B
G–W
O
W–R
W–R
C B
D A
J 4(B)
Junction
Connector
J 6(A)
Junction
Connector
D A
GR
W–R
C B
Y
R–B
W–R
12 IB1
P15
Passenger Seat Belt
Warning Lamp
2
5
B
B9
Buckle SW LH
Seat Position Sensor
SA2
PBEW
2
E
4
Y
LBE–
3
GR
LBE+
R–B
3
17 B
23 B
11 A
12 A
12 C
13 C
P–AB
PAON
DBE+
DBE–
FSP+
W–B
PAON
G–W
6
GR
P–AB
R
13 B
IND
1
G–W
O
Passenger' s Seat Belt/
Airbag Indicator (ON/OFF)
FSP–
A19(A), A20(B), A21(C)
Airbag Sensor Assembly
BK
131
SCION xB (EM0091U)
Seat Belt Warning (From Dec. 2005 Production)
B
O 5(A), O 6(B)
Occupant Classification ECU
Y
FSR–
DIA
2 A
GND
3 A
11 IB1
5 IB1
BGND
5 A
W–R
6 1R
BSW
9 A
P
4 A
GR
FSR+
O
8 A
W–B
+B
1 A
W
IG
7 A
B
7. 5A
ECU–B
W–R
(BAT)
6 IB1
J 4(B)
Junction
Connector
W
F B
W–R
2
RBE–
B10
Buckle SW RH
12 1H
11 1K
5 1P
2 1O
GR
W
Y
1
RBE+
W–B
F B
7
SIL
W–B
D1
Data Link
Connector 3
IE
132
SCION xB (EM0091U)
O 5(A), O 6(B)
Occupant Classification ECU
BR
SGD4
4 B
R
SIG4
10 B
V
SVC4
6 B
O
SGD2
2 B
L
SIG2
8 B
W
SVC2
12 B
W
SGD3
3 B
Y
SIG3
9 B
GR
SVC3
5 B
G
SGD1
1 B
SB
SIG1
7 B
R
SVC1
11 B
1
2
3
1
2
3
1
2
3
1
2
3
SVC1
SIG1
SGD1
SVC3
SIG3
SGD3
SVC2
SIG2
SGD2
SVC4
SIG4
SGD4
O7
Occupant Classification
Sensor Front LH
O9
Occupant Classification
Sensor Rear LH
O8
Occupant Classification
Sensor Front RH
O10
Occupant Classification
Sensor Rear RH
133
SCION xB (EM0091U)
Seat Belt Warning (From Dec. 2005 Production)
System Outline
Current is always applied from the DOME fuse to TERMINAL 1 of the combination meter. When the ignition SW is turned to
ON position, the current from the GAUGE fuse flows to TERMINAL 23 of the combination meter and flows TERMINAL 2 of
the passenger seat belt warning lamp.
Seat Belt Warning System
When the ignition SW turned on, a signal is input to the combination meter. To determine whether the driver has fastened the
seat belt, a signal is input from the buckle SW LH to TERMINAL 32 of the combination meter. When the seat belt is not
fastened, the seat belt warning light in the combination meter blinks, and emits a warning sound.
In addition, the front passenger is recognized by the occupant classification ECU is installed in the front passenger seat, and
determines whether the seat belt is fastened. When not fastened, the signals from the occupant classification ECU is input to
TERMINAL 1 of the passenger seat belt warning lamp via the combination meter, and the passenger seat belt warning lamp
blinks.
: Parts Location
Code
See Page
Code
See Page
Code
O6
See Page
A19
A
30
D1
30
A20
B
30
F8
28
O7
B
33
33
A21
C
30
I10
30
O8
33
B9
32
J4
B
31
O9
33
B10
32
J6
A
31
O10
33
C6
30
O5
A
33
P15
31
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1G
1H
1K
1L
1O
1P
1R
: Connector Joining Wire Harness and Wire Harness
Code
IB1
See Page
35
Joining Wire Harness and Wire Harness (Connector Location)
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
: Ground Points
Code
See Page
Ground Points Location
IE
35
Left Kick Panel
IF
35
Instrument Panel Brace LH
BK
36
Rear Quarter Panel Inner RH
134
SCION xB (EM0091U)
Memo
135
SCION xB (EM0091U)
Remote Control Mirror
(ACC)
15A
ACC
GR
6 1L
R5
Remote Control Mirror SW
8
HL
HR
5
VL
2
VR
4
M+
3
7
G–Y
LG–B
BR–W
E
6
LG–R
BR–Y
Operation SW
RH
Select SW
Down
LH
W–B
Up
RH
Right/
Down
Right
LH
Left/
Up
Left
B
5 1L
2 IC2
3 IC2
3 IG2
2 IG2
M
G–R
3
M
M
3
G–R
M
1 IG2
1 IC2
G–R
5
G–W
LG–B
1
11 1L
G–W
LG–R
5
R17
Remote Control
Mirror RH
BR–Y
1
R16
Remote Control
Mirror LH
BR–W
12 1L
G–W
W–B
G–R
IE
136
SCION xB (EM0091U)
: Parts Location
Code
See Page
R5
31
Code
R16
See Page
33
Code
R17
See Page
33
: Junction Block and Wire Harness Connector
Code
1L
See Page
25
Junction Block and Wire Harness (Connector Location)
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IC2
35
Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
IG2
35
Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
: Ground Points
Code
IE
See Page
35
Ground Points Location
Left Kick Panel
137
SCION xB (EM0091U)
Light Reminder
(BAT)
(IG)
10A
TAIL
(BAT)
10A
GAUGE
15A
DOME
2
13 1G
1
L–Y
4 1M
R–B
4 1A
G–W
L–Y
12 1G
23
1
OFF
C8
Combination SW
Tail
CPU
Head
21
R
10 1F
1 1F
4 1G
9 1M
19 1P
1 1S
R
BR
Y
24
Y
25
G
26
U1
Unlock Warning
SW
G
10
G
Light
Control SW
13
C6
Combination Meter
Buzzer
2
16 1P
1
D5
Door Courtesy SW
Front LH
W–B
1
IE
138
SCION xB (EM0091U)
BR
W–B
2 1D
IF
System Outline
The current is applied at all times to TERMINAL 1 of the combination meter through the DOME fuse.
When the ignition SW is turned to ON position, the current flows to TERMINAL 23 of the combination meter through the
GAUGE fuse. When the light control SW is turned to TAIL or HEAD position, current is applied to TERMINAL 26 of the
combination meter through the TAIL fuse.
Light Reminder System
When the light control SW is in TAIL or HEAD position, the ignition SW turned to OFF from ON position, ignition key is not in
the key cylinder and the driver’s door opened (Door courtesy SW on), the current flows to TERMINAL 23 of the combination
meter stops. As a result, the combination meter is activated and current flows from TERMINAL 1 of the combination meter,
the buzzer in the combination meter goes on to remind the light is lighting up.
: Parts Location
Code
See Page
Code
See Page
C6
30
D5
32
C8
30
U1
31
Code
See Page
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
1D
1F
1G
1M
1P
1S
: Ground Points
Code
See Page
Ground Points Location
IE
35
Left Kick Panel
IF
35
Instrument Panel Brace LH
139
SCION xB (EM0091U)
Cigarette Lighter
(ACC)
15A
ACC
B–W
6 1N
2
C4
Cigarette
Lighter
W–B
1
IE
140
SCION xB (EM0091U)
: Parts Location
Code
See Page
C4
Code
See Page
Code
See Page
30
: Junction Block and Wire Harness Connector
Code
1N
See Page
25
Junction Block and Wire Harness (Connector Location)
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
: Ground Points
Code
IE
See Page
35
Ground Points Location
Left Kick Panel
141
SCION xB (EM0091U)
Horn
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
(BAT)
15A
HORN
2
G–W
G–W
1
1
1
1
5
HORN
Relay
2
3
1
1
G–R
W–R
G–R
W–R
4 IA1
W–R
23
1 A (∗1)
6 B (∗2)
Horn
HORN
C 7(A), (B)
Combination SW
G–R
C A (∗1)
B B (∗2)
W–R
C A
B B
C A (∗1)
B B (∗2)
G–R
J 4(A), (B)
Junction
Connector
1
1
H4
Horn
(High)
D4
Door Lock
Control Relay
142
SCION xB (EM0091U)
H5
Horn
(Low)
: Parts Location
Code
C7
See Page
A
30
B
30
D4
30
Code
See Page
H4
28
H5
J4
Code
J4
See Page
B
31
28
A
31
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Connector Joining Wire Harness and Wire Harness
Code
IA1
See Page
35
Joining Wire Harness and Wire Harness (Connector Location)
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
143
SCION xB (EM0091U)
Rear Window Defogger
(IG)
(BAT)
10A
GAUGE
30A
DEF
2
8 1J
B
B–R
11 1P
I12
Integration Control and Panel
B–R
3
1
2
5
4
B
B
R–B
B
1 BC1
B
1 BD1
F15
Fuse Block
6 IB2
B
W–B
1
7. 5A I/UP
W–B
B
2
1
N2
Noise Filter (Rear
Window Defogger No. 1)
Timer
Circuit
B–R
3
R4
Rear Window
Defogger Relay
On
B–R
Off
R–B
Rear Window
Defogger SW
B–Y
2
B
1 A
1 B
B
W–B
1
3
ELS2
W–B
IE
144
SCION xB (EM0091U)
BM
R13(A), R14(B)
Rear Window Defogger
2 1O
N4
Noise Filter
(Stop Light and Rear Window Defogger No. 2)
B
3 1K
E4
Engine Control
Module
: Parts Location
Code
See Page
Code
See Page
Code
See Page
E4
30
N2
31
R13
A
33
F15
30
N4
33
R14
B
33
I12
30
R4
31
: Junction Block and Wire Harness Connector
Code
See Page
Junction Block and Wire Harness (Connector Location)
1J
1K
1O
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1P
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IB2
35
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
BC1
36
Back Door No.1 Wire and Floor Wire (Right Rear Side Quarter Pillar)
BD1
36
Back Door No.1 Wire and Rear Window No.1 Wire (Right Side of Back Door)
: Ground Points
Code
See Page
Ground Points Location
IE
35
Left Kick Panel
BM
36
Back Door LH
145
SCION xB (EM0091U)
Audio System
(BAT)
(ACC)
15A
DOME
2
1
15A
ACC
A14
Antenna
Amplifier
9 1N
2
L–Y
1
R11
Rear Speaker
LH
B
2
1
R12
Rear Speaker
RH
B
Y
R
W
1
9 IB2
10 IB2
11 IB2
12 IB2
+B
ANT
Y
R
W
8 A
B
4 A
GR
L–Y
3 1N
B–R
4 1A
3 A
2 B
6 B
1 B
3 B
ACC
RL+
RL–
RR+
RR–
R 2(A), R 3(B), R18(C)
Radio and Player
FL–
V
LG
L
F A
A A
D A
D B
D B
C B
C B
V
V
LG
LG
2
1
P
P
7 IC2
14 IG2
LG
P
14 IC2
W–B
F B
2
T5
Tweeter RH
V
T4
Tweeter LH
1
F B
L
A B
2
F12
Front Door Speaker LH
146
SCION xB (EM0091U)
7 IG2
L
A B
1
IF
FR–
5 A
C A
W–B
J 2(A), J 3(B)
Junction Connector
FR+
1 A
P
6 A
1
2
F13
Front Door Speaker RH
J 2(A), J 3(B)
Junction Connector
FL+
2 A
L
GND
7 A
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
(IG)
C7
Combination SW
(BAT)
10A
GAUGE
15A
DOME
2
Volume–
13 1G
1
L–Y
R–B
Volume+
Seek–
4 1A
MODE
Seek+
12 1G
EAU
AU1
11
10
12
LG
P
8 C
6 C
7 C
23
SW1
R 2(A), R 3(B), R18(C)
Radio and Player
SPD
3 C
CPU
C6
Combination Meter
AUXI
19 C
V–W
ASGN
16 C
R
W
ARI
15 C
B
1
2
ALO
ARO
3
4
ASGN
AUXO
D A (∗1)
D B (∗2)
J 4(A), (B)
Junction
Connector
D A (∗1)
D B (∗2)
V–W
29
28
21
13 IA1
W–R
V–W
S9
Stereo Jack Adapter
S3
Skid Control ECU
with Actuator
(Shielded)
ALI
17 C
W–R
SWG
Speedometer
SW2
1
W–B
O
L–Y
AU2
12
SP1
IF
147
SCION xB (EM0091U)
Audio System
: Parts Location
Code
See Page
A14
30
C6
30
C7
30
F12
32
F13
32
J2
A
31
Code
J3
See Page
Code
See Page
B
31
A
31
B
31
S3
29
R2
A
31
S9
31
R3
B
31
T4
31
33
T5
31
J4
R11
R12
R18
33
C
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
1G
1N
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IA1
35
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
IB2
35
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
IC2
35
Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
IG2
35
Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
: Ground Points
Code
IF
See Page
35
Ground Points Location
Instrument Panel Brace LH
148
SCION xB (EM0091U)
31
Memo
149
SCION xB (EM0091U)
Headlight
(BAT)
(BAT)
(BAT)
15A
DOME
10A H–LP RH/
H–LP LO RH
10A H–LP LH/
H–LP LO LH
2
2
2
1
1
1
B
B–R
L–Y
B
4 1A
9 1A
8 1A
10 1B
H2
Headlight RH
5 1M
2 1F
B–W
Beam
1
C6
Combination Meter
B–W
11 1B
B–W
14
3
H6
Headlight
Relay
B–Y
1
L–Y
B–W
B–W
7 1M
B
2
B–Y
B A
1
B–Y
B–Y
B A
J 6(A), J 7(B)
Junction Connector
5 IA2
2
12 1G
B–Y
B
1
B B
3
H1
Headlight LH
3
B–Y
2
5
8
9
W–B
R
Dimmer SW
13
Flash
OFF
Low
Tail
High
Head
HRLY
Light Control SW
D4
Door Lock
Control Relay
C8
Combination SW
W–B
11
6 1M
IG
W–B
W–B
2 1O
IE
58
SCION xB (EM0091U)
: Parts Location
Code
See Page
Code
See Page
Code
See Page
C6
30
H1
28
J6
A
31
C8
30
H2
28
J7
B
31
D4
30
H6
30
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
1B
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1F
1G
1M
1O
: Connector Joining Wire Harness and Wire Harness
Code
IA2
See Page
35
Joining Wire Harness and Wire Harness (Connector Location)
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
: Ground Points
Code
See Page
Ground Points Location
IE
35
Left Kick Panel
IG
35
Right Kick Panel
59
SCION xB (EM0091U)
BR
3
4 1T
2
7 IB2
BR
IF
150
SCION xB (EM0091U)
13 IA1
D A (∗1)
D B (∗2)
28
32
27
B
1 1O
V–W
SPD
TACH
8
7
SP1
C B
6 1F
A A
29
34
7 1F
J 6(A), J 7(B)
Junction Connector
V–W
B
V–W
3 1H
B–Y
2
4 1K
Airbag Sensor Assembly
C6
Combination Meter
V–W
7 1A
J 4(A), (B)
Junction
Connector
W–R
12
W–G
35
W–R
W–R
I10
Ignition SW
S3
Skid Control ECU
with Actuator
ST2
Rheostat
33
G–W
25
O
W–R
Door Lock
Control
Relay
B
Buckle SW LH
31
Occupant Detection Sensor (∗1)
Airbag Sensor Assembly (∗2)
3
Y
21
Fuel
Tachometer
Speedometer
W–R
IG2 6
Unlock Warning SW
F14
Fuel Sender
Clock M
Clock H
ODO/Trip SW
1
V
BR
1
V
F8
Fusible Link Block
B–L
5 AM2
Integration Control and Panel (∗1)
Passenger Seat Belt Warning Lamp (∗2)
BR
Battery
60A MAIN
Combination Meter
B
E4
Engine Control Module
D A (∗1)
D B (∗2)
30
LCD
(ODO/Trip
Clock)
1
CPU
15A
AM2
Buzzer
W–B
36
37
14 IA2
1
2
SCION xB (EM0091U)
2
1
O1
Oil Pressure SW
LCD Back Light
Oil Pressure
CPU
G
40
G
38
ABS
1
P
8 1G
Skid Control ECU
with Actuator
12 1G
B2
Brake Fluid Level
Warning SW
6 1O
B
B–R
4 1A
B
Brake
Beam
23
B–W
14
B–Y
Door
L–Y
13 1G
Skid Control ECU
with Actuator
15
R–W
L–Y
B
10A
GAUGE
Combination SW
24
R
R–B
(IG)
Door Courtesy SW
Front RH, Rear LH, RH
Back Door Courtesy SW
Door Courtesy SW
Front LH
SRS
Belt
Fuel
Maint
Reqd
B
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
(BAT)
15A
DOME
2
1
C6
Combination Meter
17
IF1
EA
151
3
R–Y
Y–R
Y–B
19
Engine Control
Module
5
B–R
4
Skid Control ECU
with Actuator
12
BR–W
G–O
Y–G
20
Engine Control Module
Y
16
Engine Control Module
Generator
152
SCION xB (EM0091U)
2
G–B
G–Y
C6
Combination Meter
Turn RH
Turn LH
Water Temp. Cool
Water Temp. Hot
TRAC OFF
Slip
VSC
O/D OFF
Malfunction
Indicator Lamp
Charge
FLSH Relay
Combination Meter
13
18
Illumination
SCION xB (EM0091U)
L
2
D
N
R
P
R–W
GR
R–Y
G–R
G–W
G
R
26
6
7
8
9
10
11
C6
Combination Meter
153
A/T Indicator
Light SW
Combination SW
Combination Meter
: Parts Location
Code
See Page
Code
B2
28
F14
C6
30
I10
E4
30
F8
28
J4
See Page
Code
32
J6
30
J7
See Page
A
31
B
31
A
31
O1
29
B
31
S3
29
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
1F
1G
1H
1K
1O
1T
: Connector Joining Wire Harness and Wire Harness
Code
IA1
See Page
Joining Wire Harness and Wire Harness (Connector Location)
35
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
IB2
35
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
IF1
35
Engine Wire and Instrument Panel Wire (Behind the Glove Box)
IA2
: Ground Points
Code
See Page
Ground Points Location
EA
34
Front Right Fender Apron
IF
35
Instrument Panel Brace LH
154
SCION xB (EM0091U)
Memo
155
SCION xB (EM0091U)
Radiator Fan and Condenser Fan
(BAT)
(IG)
30A
RDI
7. 5A
ECU–IG
2
1
3 1B
L–W
B–L
B–L
1
5
L–R
1
1
1
1
FAN
NO. 1
Relay
3
1
3
4
FAN
NO. 2
Relay
2
2
1
5
1
1
1
1
14
FANL
FANH
L
2
M
R1
Radiator
Fan Motor
2
1
1
W–B
W–B
L–R
EB
156
SCION xB (EM0091U)
W–B
L–R
W–B
E3
Engine Control Module
A1
A/C Condenser
Fan Resistor
L
13
W–B
W–L
7 IA1
W–L
15 IA2
Y–R
Y–R
L
W–L
System Outline
The current is applied at all times through the RDI fuse to TERMINAL 5 of the FAN NO.1 relay.
When the ignition SW is turned on, the current flows through the ECU–IG fuse to FAN NO.1 relay (Coil side) to TERMINAL
13 of the engine control module. At the same time as this current flow, the current from ECU–IG fuse flows to the FAN NO.2
relay (Coil side) to TERMINAL 14 of the engine control module.
1. Low Speed Operation
When the A/C system is operating, the FAN NO.1 Relay is turned on. As a result, the current flows from the RDI fuse to FAN
NO.1 relay (Point side) to TERMINAL 2 of the radiator fan motor to TERMINAL 1 to TERMINAL 3 of the FAN NO.2 relay to
TERMINAL 4 to TERMINAL 2 of the A/C condenser fan resistor to TERMINAL 1 to GROUND, and the radiator fan motor
rotates at low speed.
2. High Speed Operation
When the pressure SW (Single) is on or engine control module operated, the FAN NO.1 and NO.2 relay is turned on. As a
result, the current flows from the RDI fuse to FAN NO.1 relay (Point side) to radiator fan motor to TERMINAL 3 of the FAN
NO.2 Relay to TERMINAL 5 to GROUND, and the radiator fan motor rotates at high speed.
: Parts Location
Code
See Page
A1
28
Code
E3
See Page
30
Code
R1
See Page
29
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1B
See Page
24
Junction Block and Wire Harness (Connector Location)
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
: Connector Joining Wire Harness and Wire Harness
Code
IA1
IA2
See Page
35
Joining Wire Harness and Wire Harness (Connector Location)
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
: Ground Points
Code
EB
See Page
34
Ground Points Location
Front Left Fender Apron
157
SCION xB (EM0091U)
Two Way Flow Heater
B–Y
(BAT)
(IG)
10A
GAUGE
B–Y
40A
HTR
2
9 1J
5
1
4
3
2
7 1J
1 1J
L–R
L
W–B
2 1O
HTR
Relay
7. 5A
A. C
B4
Blower Resistor
1
4
6 IH1
5 IH1
L–Y
L–W
10
6
7
4 IH1
W–B
3 IH1
L–B
L–B
2
W–B
1
L–B
3
L–W
2
L–Y
M
L–B
B3
Blower Motor
L–R
1 IH1
Blower SW
HI
M2
M1
LO
OFF
L
2
1
W–B
W–B
I13
Integration Control and Panel
W–B
IG
IE
158
SCION xB (EM0091U)
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
B–Y
(IG)
A A (∗1)
A B (∗2)
J 4(A), (B)
Junction
Connector
A A (∗1)
A B (∗2)
7. 5A
ECU–IG
B–L
B–Y
11 1H
I15
Integration Control and Panel
2
L–B
B–L
B–L
A8
Air Inlet Servo Motor
B–L
Foot SW
F/D SW
W
L–B
Max Hot SW
Foot Mode SW
7
L–B
W
A
3
1
Control
Circuit
M
J7
Junction
Connector
A
2
3
1
8
W–B
L–B
B
L–B
W
B–L
L–Y
L–R
L–O
A
14 B
17 B
14 A
18 A
16 A
28 A
SW–6
SW–9
IG
OUT–6 OUT–4 OUT–7
A17(A), A18(B)
A/C Amplifier
CANL
B
L–W
2
D2
Inlet Air Position
Detection SW
J5
Junction
Connector
IF1
L
4
GND–1
24 A
W–B
A
SW–2
20 A
G–B
9 A
W
CANH
8 A
B
ALT
24 B
FRS
A
B
L
REC
W
33 B
34 B
L
W–B
B
1
W–B
3
10 C
ALT
CANH
CANL
W–B
M
G1
Generator
E 4(B), E 5(C)
Engine Control Module
IG
159
SCION xB (EM0091U)
Two Way Flow Heater
System Outline
When all of the following conditions are met, the recirculation/fresh air inlet damper is switched to the DUAL MODE position.
∗ The recirculation/fresh air switch is at FRESH position
∗ The blower SW is on.
∗ The max hot SW is on.
∗ The foot mode SW is at FOOT or F/D position.
: Parts Location
Code
See Page
A8
Code
30
See Page
D2
Code
30
A17
A
30
E4
B
30
A18
B
30
E5
C
30
See Page
I15
J4
30
A
31
B
31
B3
30
G1
28
J5
31
B4
30
I13
30
J7
31
: Junction Block and Wire Harness Connector
Code
See Page
Junction Block and Wire Harness (Connector Location)
1H
1J
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1O
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IF1
35
Engine Wire and Instrument Panel Wire (Behind the Glove Box)
IH1
35
Instrument Panel Wire and A/C Sub Wire (Right Side of A/C Unit)
: Ground Points
Code
See Page
Ground Points Location
IE
35
Left Kick Panel
IG
35
Right Kick Panel
160
SCION xB (EM0091U)
Memo
161
SCION xB (EM0091U)
PTC Heater
(BAT)
(BAT)
(IG)
40A
HTR
50A
HTR
SUB1
10A
GAUGE
2
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
(IG)
7. 5A
ECU–IG
2
11 1H
1
1
3
2
1
R
B–L
HTR
Relay
4
E2
Engine Coolant
Temp. Sensor
5
5
2 1O
1
1
G1
Generator
9 1J
3
ALT
3
B–Y
28 C
E2
M
2
1
10 C
CANH
CANL
33 B
34 B
B
A
B
24 B
PTC1
IG
ALT
SW–6
L–B
14 B
8 A
9 A
CANH
CANL
GND–1
24 A
L–B
3
A17(A), A18(B)
A/C Amplifier
W
14 A
W–B
9 B
B
G–B
IF1
A
A
W–B
J7
Junction
Connector
IE
EA
IG
162
SCION xB (EM0091U)
J5
Junction
Connector
A
L
P5
PTC Heater
I15
Integration Control
and Panel
L–B
Max Hot SW
B–L
1
4
B–L
2
17 IA2
L–W
B–W
W–B
B–Y
W–B
L
W
L–W
A A (∗1)
A B (∗2)
J 4(A), (B)
Junction
Connector
A A (∗1)
A B (∗2)
B
L
1
32 C
THW
HTR SUB1
Relay
E 4(B), E 5(C)
Engine Control
Module
1
BR
7. 5A
A. C
R–L
2
System Outline
When all of the following conditions are met, the PTC heater operates.
∗ The engine coolant temp. has reached the specified temperature.
∗ The engine RPM has exceeded the specified RPM for more than 5 seconds continuously.
∗ The max hot SW is on.
If any of the above conditions change, the PTC heater stops. The PTC heater is turned on/off according to the generator’s
charge/discharge condition.
: Parts Location
Code
A17
A18
See Page
G1
28
J5
31
28
I15
30
J7
31
31
P5
31
J4
A
30
J4
See Page
30
30
C
Code
B
B
E5
See Page
30
E2
E4
Code
A
B
31
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
See Page
Junction Block and Wire Harness (Connector Location)
1H
1J
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1O
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IA2
35
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
IF1
35
Engine Wire and Instrument Panel Wire (Behind the Glove Box)
: Ground Points
Code
See Page
Ground Points Location
EA
34
Front Right Fender Apron
IE
35
Left Kick Panel
IG
35
Right Kick Panel
163
SCION xB (EM0091U)
Air Conditioning
B–Y
(BAT)
(IG)
B–Y
10A
GAUGE
B–Y
40A
HTR
9 1J
18 1H
2
5
1
4
3
2
7 1J
1 1J
L–R
L
W–B
2 1O
HTR
Relay
7. 5A
A. C
B–Y
1 IH1
W–B
1
2
4
W–B
3
L–W
1
2
L–Y
M
L–B
B3
Blower Motor
L–R
B4
Blower Resistor
5 IH1
L–Y
L–W
10
6
7
W–B
6 IH1
4 IH1
W–B
3 IH1
L–B
L–B
L–B
W–B
Blower SW
HI
M2
M1
LO
OFF
2
L
IE
IG
164
SCION xB (EM0091U)
W–B
I13
Integration Control and Panel
W–B
W–B
1
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
B–Y
(IG)
7. 5A
ECU–IG
I11
Integration Control and Panel
B–L
B–Y
11 1H
A A (∗1)
A B (∗2)
J 4(A), (B)
Junction
Connector
A/C SW
Off
A A (∗1)
A B (∗2)
A A (∗1)
A B (∗2)
B–Y
B–Y
On
W
4
2
1
W
B–L
B–W
BR
26 A
17 B
14 A
22 A
23 A
S5–2
SG–1
PRE
ALT
CANL
BR
B–R
G–B
3 IA1
8 IA1
13 IA2
4 IA1
BR
B–R
9 A
R–W
8 A
12 IF1
2
3
1
2
L
A
B
A
B
L
33 B
34 B
L
A2
A/C Magnetic
Valve
3
10 C
M
P2
Pressure Sensor
CANL
NE–
27 C
34 C
W
B–W
CANH
O
NE+
G1
Generator
(Shielded)
1
ALT
E 4(B), E 5(C)
Engine Control
Module
W–B
CANH
SG–2
24 B
R–W
12 A
L–B
10 A
L–B
7 A
TE
J5
Junction
Connector
SOL+
13 A
IG
W
GND–1
24 A
SW–9
W
SW–4
B
SW–5
B
27 A
B–Y
W–B
3 EA1
2
IG
BR
C3
Crankshaft
Position
Sensor
1
W–B
A17(A), A18(B)
A/C Amplifier
A6
A/C Thermistor
2
I15
Integration Control
and Panel
Max Cool SW
3
DEF
O
1
W–B
3
B–Y
1
B–L
D2
Defroster Mode
Detection SW
2
EC
EA
165
SCION xB (EM0091U)
Air Conditioning
System Outline
Current is applied at all times through the HTR fuse to TERMINAL 5 of the HTR relay.
When the ignition SW is turned on, the current flows through the GAUGE fuse to TERMINAL 1 of the HTR relay to
TERMINAL 2 to TERMINAL 2 of the blower SW.
1. Heater Blower Motor Operation
∗ Low speed operation
When the blower SW is moved to LO position, the current flows to TERMINAL 2 of the blower SW to TERMINAL 1 to
GROUND, causing the HTR relay to turn on. This causes the current flows from the HTR fuse to TERMINAL 5 of the
HTR relay to TERMINAL 3 to TERMINAL 1 of the blower motor to TERMINAL 2 to TERMINAL 1 of the blower resistor to
TERMINAL 4 to GROUND, rotating the blower motor at low speed.
∗ Medium speed operation (Operation at M1, M2)
When the blower SW is moved to M1 position, the current flows to TERMINAL 2 of the blower SW to TERMINAL 1 to
GROUND, causing the HTR relay to turn on. This causes the current flows from the HTR fuse to TERMINAL 5 of the
HTR relay to TERMINAL 3 to TERMINAL 1 of the blower motor to TERMINAL 2 to TERMINAL 1 of the blower resistor to
TERMINAL 2 to TERMINAL 7 of the blower SW to TERMINAL 1 to GROUND. At this time, the blower resistance of the
blower resistor is smaller than at low speed, so the blower motor rotates at medium low speed.
When the blower SW is moved to M2 position, the current flows through the HTR relay to TERMINAL 1 of the blower
motor to TERMINAL 2 to TERMINAL 1 of the blower resistor to TERMINAL 3 to TERMINAL 6 of the blower SW to
TERMINAL 1 to GROUND. At this time, resistance of the blower resistor is smaller than at M1 position, so the blower
motor rotates at medium high speed.
∗ High speed operation
When the blower SW is moved to HI position, the current flows to TERMINAL 2 of the blower SW to TERMINAL 1 to
GROUND, causing the HTR relay to turn on.
This causes the current flows from the HTR fuse to TERMINAL 5 of the HTR relay to TERMINAL 3 to TERMINAL 1 of
the blower motor to TERMINAL 2 to TERMINAL 10 of the blower SW to TERMINAL 1 to GROUND, rotating the blower
motor at high speed.
2. Air Conditioning Operation
When the blower SW is set on, the current flows from the HTR fuse to the HTR relay (Point side) to the A.C fuse to the
TERMINAL 3 of the A/C SW. If the A/C SW is turned on, at this time a signal is input into the A/C amplifier. This activates the
A/C amplifier.
3. DEF or FOOT & DEF Synchronized Control Function
When the blower SW is on and the heater control lever (Air vent mode control lever) turned to DEF position, it causes A/C to
run whether A/C SW is on or not.
: Parts Location
Code
See Page
A2
Code
28
A6
See Page
C3
30
D2
Code
28
I13
30
I15
A17
A
30
E4
B
30
A18
B
30
E5
C
30
J4
See Page
30
30
A
31
B
31
B3
30
G1
28
J5
31
B4
30
I11
30
P2
29
: Junction Block and Wire Harness Connector
Code
See Page
Junction Block and Wire Harness (Connector Location)
1H
1J
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1O
166
SCION xB (EM0091U)
: Connector Joining Wire Harness and Wire Harness
Code
EA1
See Page
Joining Wire Harness and Wire Harness (Connector Location)
34
Engine Wire and Engine Room Main Wire (Inside of Engine Room R/B)
35
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
IF1
35
Engine Wire and Instrument Panel Wire (Behind the Glove Box)
IH1
35
Instrument Panel Wire and A/C Sub Wire (Right Side of A/C Unit)
IA1
IA2
: Ground Points
Code
See Page
Ground Points Location
EA
34
Front Right Fender Apron
EC
34
Engine Block
IE
35
Left Kick Panel
IG
35
Right Kick Panel
167
SCION xB (EM0091U)
Fog Light
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
(BAT)
(IG)
15A
FOG
(∗1)
10A
GAUGE
(∗2)
G–R
10 1J
G–R
5
2
F10
Front Fog
Light Relay
1
G–O
R–W
3
12 IA1
B B
J 6(A), J 7(B)
Junction Connector
B–W
B–W
G–O
B A
2
R–W
R–W
8
3
OFF
Flash
OFF
ON
Low
Tail
High
Head
F11
Front Fog Light SW
1
Light Control SW
F3
Front Fog
Light LH
1
2
F4
Front Fog
Light RH
2
Dimmer SW
C8
Combination SW
W–B
W–B
W–B
11
6 1M
W–B
2 1O
W–B
EB
EA
IE
60
SCION xB (EM0091U)
: Parts Location
Code
See Page
C8
30
F3
28
F4
28
Code
See Page
F10
30
F11
J6
Code
J7
See Page
B
31
30
A
31
: Junction Block and Wire Harness Connector
Code
See Page
Junction Block and Wire Harness (Connector Location)
1J
1M
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1O
: Connector Joining Wire Harness and Wire Harness
Code
IA1
See Page
35
Joining Wire Harness and Wire Harness (Connector Location)
Engine Room Main Wire and Instrument Panel Wire (Behind the Reinforcement LH)
: Ground Points
Code
See Page
Ground Points Location
EA
34
Front Right Fender Apron
EB
34
Front Left Fender Apron
IE
35
Left Kick Panel
61
SCION xB (EM0091U)
On
IE
1
2
2
EB
3
C
2
3
1
2
EA
5
W–B
1
BJ
62
SCION xB (EM0091U)
5
1
W–B
BK
14 1F
13
18
W–B
21
W–B
W–B
IF
W–B
G–Y
C
G–B
5 1T
C6
Combination Meter
C
8 1S
ER
Turn RH
J1
Junction
Connector
EL
Turn LH
A
G–Y
G–Y
W–B
5
R8
Rear Combination
Light RH
A
C8
Combination SW
Turn
6 1B
W–B
+B
G–B
4
R7
Rear Combination
Light LH
7 1B
G–B
4 1J
Turn
10A
HAZ
W–B
2
S2
Side Turn
Signal Light RH
LL
G–Y
3
G–Y
IG
G–Y
1
F6
Front Turn Signal
Light RH
W–B
1
W–B
9 1P
A
F5
Front Turn Signal
Light LH
8
G–B
EHW
W–B
2
S1
Side Turn
Signal Light LH
G–B
G–O
10A
GAUGE
BR
Off
G–B
10 1G
I12
Integration Control and Panel
W–B
G–O
(IG)
W–B
W–B
W–B
Hazard
SW
Turn Signal and Hazard Warning Light
(BAT)
W–B
LH
6
Turn
RH
7
3 1M
1 1M
2 1M
5
6
GND
7
FLSH Relay
LR
9 1F
2 1O
: Parts Location
Code
See Page
C6
30
C8
F5
F6
Code
See Page
Code
See Page
I12
30
S1
29
30
J1
31
S2
29
28
R7
33
28
R8
33
: Junction Block and Wire Harness Connector
Code
1B
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
1F
1G
1J
1M
1O
1P
1S
1T
: Ground Points
Code
See Page
Ground Points Location
EA
34
Front Right Fender Apron
EB
34
Front Left Fender Apron
IE
35
Left Kick Panel
IF
35
Instrument Panel Brace LH
BJ
36
Rear Quarter Panel Inner LH
BK
36
Rear Quarter Panel Inner RH
63
SCION xB (EM0091U)
W–B
1
D5
Door Courtesy SW
Front LH
1 1S
3 1S
R–W
1
1
R–Y
7
5
3 IB2
4 1L
R–W
1
R–Y
R
DCTY
2
1
BL
64
SCION xB (EM0091U)
B5
Back Door Courtesy SW
R–W
5 1G
R–Y
4 1G
PCTY
D8
Door Courtesy SW
Rear RH
15
R–W
24
R–W
LP
4
D4
Door Lock Control Relay
1
8 1L
R–W
4 BC1
OFF
ON
DOOR
1
D7
Door Courtesy SW
Rear LH
R–W
Door
L–Y
L–Y
L–Y
L–Y
5 1S
R–W
R–W
R
4 1A
D6
Door Courtesy SW
Front RH
R–W
R
C6
Combination Meter
Interior Light
(BAT)
15A
DOME
2
1
12 1G
2
I14
Interior Light
: Parts Location
Code
See Page
Code
See Page
Code
See Page
B5
32
D5
32
D8
32
C6
30
D6
32
I14
32
D4
30
D7
32
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
1G
1L
1S
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IB2
35
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
BC1
36
Back Door No.1 Wire and Floor Wire (Right Rear Side Quarter Pillar)
: Ground Points
Code
BL
See Page
36
Ground Points Location
Back Door Center
65
SCION xB (EM0091U)
EB
W–B
EA
W–B
BJ
W–B
5 BE1
6 BE1
G
2 BC2
G
G
1
2
4 BC2
BK
66
SCION xB (EM0091U)
1
BL
G
G
J9
Junction Connector
6 C
SWG
GND
W–B
IF
R 2(A), R 3(B)
Radio and Player
LG
C7
Combination SW
G
3 BE1
R 2(A), R18(C)
Radio and Player
W–B
L1
License
Plate Light
2
W–G
2
W–B
2 BE1
R10
Rear Side Marker
Light RH
G
G
G
G
9 1S
W–B
1
B
W–B
1
W–B
4
R9
Rear Side Marker
Light LH
W–B
G
B
W–B
1
R8
Rear Combination Light RH
Tail
B
W–B
2
4
W–B
1
B
G
13 1B
R7
Rear Combination Light LH
Tail
G–O
G
12 1B
W–B
2
F6
Front Parking Light RH
1
W–B
W–B
F5
Front Parking Light LH
G
Light
Control SW
C8
Combination SW
G–W
Taillight and Illumination
(BAT)
10A
TAIL
4 1M
OFF
13
Tail
Head
10
9 1M
9 1K
5 1N
1
B
10
10 A
7 A
5 B
W–G
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
(BAT)
(IG)
15A
DOME
10A
GAUGE
2
13 1G
3 1L
R–B
L–Y
1
R–B
4 1A
1 1P
G
L–Y
R–B
A7
A/T Shift Lever
Illumination
G
1
23
D B
G
R–B
G
Illumination
CPU
4
R6
Rheostat
P15
Passenger Seat Belt
Warning Lamp
W–G
F A
D B
26
8 1K
B A (∗1)
C B (∗2)
J 4(A), (B)
Junction
Connector
B A (∗1)
C B (∗2)
3
J 6(A), J 7(B)
Junction Connector
5
1
9 1R
10 1F
W–G
Illumination
4
I13
Integration Control and Panel
G
2 1J
R–B
L–Y
12 1G
1
4
6
5
14 1P
5 1K
7 1R
2 1O
BR
6 1J
W–G
2 1N
3
W–B
27
W–B
21
W–G
W–G
C6
Combination Meter
W–G
5
W–G
BR
W–B
W–G
IF
IE
67
SCION xB (EM0091U)
Taillight and Illumination
: Parts Location
Code
See Page
Code
See Page
Code
See Page
A7
30
J4
B
31
R6
31
C6
30
J6
A
31
R7
33
C7
30
J7
B
31
R8
33
C8
30
J9
32
R9
33
F5
28
L1
32
R10
33
F6
28
P15
31
R18
31
I13
30
R2
A
31
31
R3
B
31
J4
A
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
1A
1B
See Page
Junction Block and Wire Harness (Connector Location)
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
1F
1G
1J
1L
1K
1M
1N
1O
1P
1R
1S
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
BC2
36
Back Door No.1 Wire and Floor Wire (Right Rear Side Quarter Pillar)
BE1
36
Floor Wire and Lamp Wire (Back Panel Center)
: Ground Points
Code
See Page
Ground Points Location
EA
34
Front Right Fender Apron
EB
34
Front Left Fender Apron
IE
35
Left Kick Panel
IF
35
Instrument Panel Brace LH
BJ
36
Rear Quarter Panel Inner LH
BK
36
Rear Quarter Panel Inner RH
BL
36
Back Door Center
68
SCION xB (EM0091U)
Memo
69
SCION xB (EM0091U)
W–B
BJ
G–W
3
W–B
BK
70
SCION xB (EM0091U)
C
1
2
W–B
4 BC2
W–B
BL
H8
High Mounted
Stop Light
G–W
G–W
C
R8
Rear Combination
Light RH
Stop
G–W
G–W
G–W
J9
Junction
Connector
W–B
1
W–B
3
R7
Rear Combination
Light LH
Stop
C
N4
Noise Filter (Stop Light and
Rear Window Defogger No. 2)
G–W
1
W–B
G–R
G–Y
Stop Light
(BAT)
10A
STOP
8 1B
2
S8
Stop Light SW
1
2 1B
3 1T
C
3 BC2
2
: Parts Location
Code
See Page
Code
See Page
Code
See Page
H8
32
N4
33
R8
33
J9
32
R7
33
S8
31
: Junction Block and Wire Harness Connector
Code
See Page
Junction Block and Wire Harness (Connector Location)
1B
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
1T
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
: Connector Joining Wire Harness and Wire Harness
Code
BC2
See Page
36
Joining Wire Harness and Wire Harness (Connector Location)
Back Door No.1 Wire and Floor Wire (Right Rear Side Quarter Pillar)
: Ground Points
Code
See Page
Ground Points Location
BJ
36
Rear Quarter Panel Inner LH
BK
36
Rear Quarter Panel Inner RH
BL
36
Back Door Center
71
SCION xB (EM0091U)
R–W
R–W
2
1
BJ
(A/T)
R–W
(M/T)
1
2
1
W–B
BK
72
SCION xB (EM0091U)
R8
Rear Combination
Light RH
R–B
A3
Back–Up
Light SW
B1
Back–Up
Light SW
2
Back–Up
A
R7
Rear Combination
Light LH
R–B
J9
Junction
Connector
R–B
(A/T)
R–B
(M/T)
9
W–B
W–B
Back–Up
R–B
Back–Up Light
(IG)
10A
GAUGE
5 1E
IF1
3
2
19 IF1
9 1E
7 1S
A
R–B
A
: Parts Location
Code
See Page
Code
See Page
A3
28
J9
32
B1
28
R7
33
Code
R8
See Page
33
: Junction Block and Wire Harness Connector
Code
See Page
Junction Block and Wire Harness (Connector Location)
1E
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1S
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
: Connector Joining Wire Harness and Wire Harness
Code
IF1
See Page
35
Joining Wire Harness and Wire Harness (Connector Location)
Engine Wire and Instrument Panel Wire (Behind the Glove Box)
: Ground Points
Code
See Page
Ground Points Location
BJ
36
Rear Quarter Panel Inner LH
BK
36
Rear Quarter Panel Inner RH
73
SCION xB (EM0091U)
I GROUND POINT
Ignition Coil and
Igniter No. 1
W–B
Ignition Coil and
Igniter No. 3
W–B
Ignition Coil and
Igniter No. 2
W–B
Ignition Coil and
Igniter No. 4
W–B
1
1E
7
1P
BR
(SG)
BR
W–B
15 IF1
W
Data Link
Connector 3
BR
BR
(E1)
EC
Canister Pump Module
W–B
4
IB1
Engine Control
Module
W–B
BR
(E01)
10 IF1
BR
BR
(E02)
BR
W–B
BR
ED
BR
EFI Relay
1
ST Relay
1
(E03)
Idle Air Control
Valve
W–B
W–B
W–B
Side Turn Signal
Light RH
W–B
W–B
Front Parking Light
LH
Front Turn Signal
Light LH
B–W
A/C Magnetic
Valve
3 EA1
1
HTR SUB1 Relay
W–B
W–B
W–B
W–B
W–B
Front Fog Light RH
W–B
(GND1)
Skid Control ECU
with Actuator
(GND2)
W–B
W–B
W–B
Side Turn Signal
Light LH
Front Fog Light LH
W–B
W–B
W–B
1
W–B
FAN NO. 2 Relay
W–B
W–B
A/C Condenser Fan
Resistor
Front Wiper Motor
W–B
W–B
B–W
W–B
EB
EA
168
SCION xB (EM0091U)
W–B
Front Parking Light
RH
Front Turn Signal
Light RH
W–B
Brake Fluid Level
Warning SW
I
PWR Relay
FLSH Relay
HTR Relay
Rear Window
Defogger Relay
Rheostat
Combination SW
(EW)
Unlock Warning SW
(ED)
W–B
3
1K
15
1P
W–B
Door Control
Receiver
W–B
14
1P
1
1K
W–B
Shift Lock Control
SW
W–B
11
1N
17
1P
W–B
W–B
16
1P
3
1D
W–B
W–B
6
1M
2
1D
W–B
W–B
2
1M
5
1K
W–B
Combination SW
(TB)
5
IB1
W–B
Occupant
Classification ECU
W–B
W–B
10
1N
13
1P
2
1O
Data Link
Connector 3
(E1)
Airbag Sensor
Assembly
(E2)
(ILL–)
Passenger
Seat Belt
Warning Lamp
W–B
W–B
O/D Main SW
11
1K
(CG)
W–B
Cigarette Lighter
W–B
W–B
W–B
Door Key Lock and
Unlock SW Front RH
W–B
Door Lock Control
SW Front RH
W–B
8
IG1
W–B
W–B
7
IC1
W–B
C
(E)
W–B
C
C
J10
Junction
Connector
W–B
W–B
C
Door Key Lock and
Unlock SW Front LH
Door Unlock
Detection SW
Front LH
W–B
W–B
(E)
W–B
W–B
(E)
Door Lock Control
Relay
Door Lock
Control SW
Front LH
Power Window
Master SW
4
IH1
W–B
Blower Resistor
Integration
Control and Panel
W–B
W–B
(E)
W–B
Integration
Control and Panel
W–B
Remote Control
Mirror SW
W–B
W–B
W–B
IE
169
SCION xB (EM0091U)
I GROUND POINT
W–B
Radio and Player
Combination
Meter
BR
(ES)
7
IB2
BR
Fuel Sender
BR
IF
W–B
B
Rear Window Defogger
W–B
W–B
6
BE1
W–B
Rear Side Marker
Light RH
6
BA1
W–B
W–B
5
BE1
W–B
Rear Side Marker
Light LH
W–B
Rear Combination
Light RH
W–B
Buckle SW LH
Seat Position Sensor
BH
W–B
BI
6
BB1
W–B
W–B
BM
Yaw Rate Sensor
W–B
W–B
Fuel Pump
W–B
BK
BJ
W–B
Rear Combination
Light LH
W–B
4 BC2
High Mounted Stop
Light
W–B
W–B
W–B
W–B
W–B
W–B
W–B
License Plate Light
W–B
Back Door Opener SW
(ACT–)
(E1)
Back Door
Courtesy SW
Back Door
Lock Motor
BL
W–B
A/C Amplifier
W–B
W–B
W–B
W–B
Inlet Air Position
Detection SW
W–B
Steering Sensor
Headlight Relay
W–B
W–B
W–B
(EC)
W–B
Engine Control
Module
W–B
W–B
Air Inlet Servo
Motor
TRAC OFF SW
W–B
IG
170
SCION xB (EM0091U)
(E)
Integration
Control and
Panel
I
: Parts Location
Code
See Page
J10
Code
See Page
Code
See Page
32
: Relay Blocks
Code
1
See Page
22
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code
See Page
Junction Block and Wire Harness (Connector Location)
1D
1E
1K
1M
25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1N
1O
1P
: Connector Joining Wire Harness and Wire Harness
Code
EA1
See Page
Joining Wire Harness and Wire Harness (Connector Location)
34
Engine Wire and Engine Room Main Wire (Inside of Engine Room R/B)
35
Floor Wire and Instrument Panel Wire (Behind the Reinforcement LH)
IC1
35
Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
IF1
35
Engine Wire and Instrument Panel Wire (Behind the Glove Box)
IG1
35
Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
IH1
35
Instrument Panel Wire and A/C Sub Wire (Right Side of A/C Unit)
BA1
36
Rear Door No.1 LH Wire and Floor Wire (Center Pillar LH)
BB1
36
Rear Door No.1 RH Wire and Floor Wire (Center Pillar RH)
BC2
36
Back Door No.1 Wire and Floor Wire (Right Rear Side Quarter Pillar)
BE1
36
Floor Wire and Lamp Wire (Back Panel Center)
IB1
IB2
: Ground Points
Code
See Page
Ground Points Location
EA
34
Front Right Fender Apron
EB
34
Front Left Fender Apron
34
Engine Block
IE
35
Left Kick Panel
IF
35
Instrument Panel Brace LH
IG
35
Right Kick Panel
BH
36
Rear Door LH
BI
36
Rear Door RH
EC
ED
BJ
36
Rear Quarter Panel Inner LH
BK
36
Rear Quarter Panel Inner RH
BL
36
Back Door Center
BM
36
Back Door LH
171
SCION xB (EM0091U)
J POWER SOURCE (Current Flow Chart)
The chart below shows the route by which current flows from the battery to each electrical source
(Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.
Example
S1
Starter
Parts
40A ABS NO.1
Code of Location
50A HTR SUB1
1
30A RDI
4
7. 5A DRL
Code of Location
40A AM1
2
40A HTR
2
60A ABS
3
Electrical Source
30A POWER
25A D/L
7.5A ECU-B
Battery
3
120A ALT
10A HAZ
2
10A STOP
10A TAIL
7.5A OBD
30A DEF
2
*1
*2
15A AM2
3
60A MAIN
1
30A ST
15A HORN
15A DOME
* 1:10A H-LP LH / H-LP LO LH
* 2:10A H-LP RH / H-LP LO RH
15A EFI
1
[LOCATION]
1
: Engine Room R/B (See Page 22)
4
: Fuse Block (F15 on See Page 30)
2
: Instrument Panel J/B (See Page 24)
172
SCION xB (EM0091U)
J
15A ACC
7.5A ECU-IG
Ignition SW
(AM1)
I10
10A GAUGE
2
20A WIPER
15A FOG
HTR Relay
(Point Side)
Rear Window Defogger
Relay (Point Side)
3
2
7.5A A.C
2
R4
7.5A I/UP
4
: Fusible Link Block (See Page 23)
173
SCION xB (EM0091U)
J POWER SOURCE (Current Flow Chart)
Engine Room R/B (See Page 22)
Fuse
System
Page
7.5A
A/C
Air Conditioning
PTC Heater
164
162
10A
H–LP LH/H–LP LO LH
Headlight
Wireless Door Lock Control
58
90
10A
H–LP RH/H–LP LO RH
Headlight
Wireless Door Lock Control
58
90
AM2
ABS, TRAC and VSC
Charging
Combination Meter
Electronically Controlled Transmission and A/T Indicator
Engine Control
Seat Belt Warning (From Dec. 2005 Production)
SRS (Before Dec. 2005 Production)
SRS (From Dec. 2005 Production)
Starting and Ignition
104
46
150
98
48
130
114
118
42
15A
DOME
ABS, TRAC and VSC
Audio System
Combination Meter
Door Lock Control
Engine Control
Headlight
Interior Light
Key Reminder
Light Reminder
Seat Belt Warning (Before Dec. 2005 Production)
Seat Belt Warning (From Dec. 2005 Production)
SRS (Before Dec. 2005 Production)
SRS (From Dec. 2005 Production)
Taillight and Illumination
Wireless Door Lock Control
104
146
150
82
48
58
64
126
138
128
130
114
118
66
90
15A
EFI
Electronically Controlled Transmission and A/T Indicator
Engine Control
98
48
15A
HORN
Horn
Wireless Door Lock Control
142
90
30A
RDI
Radiator Fan and Condenser Fan
156
30A
ST
Starting and Ignition
42
40A
ABS NO.1
ABS, TRAC and VSC
104
50A
HTR SUB1
PTC Heater
162
15A
Instrument Panel J/B (See Page 24)
Fuse
7.5A
A.C
System
Two Way Flow Heater
∗ These are the page numbers of the first page on which the related system is shown.
174
SCION xB (EM0091U)
Page
158
J
Fuse
System
Page
ECU–B
ABS, TRAC and VSC
Multiplex Communication System (CAN)
Seat Belt Warning (From Dec. 2005 Production)
SRS (From Dec. 2005 Production)
104
110
130
118
7.5A
ECU–IG
ABS, TRAC and VSC
Air Conditioning
Multiplex Communication System (CAN)
PTC Heater
Radiator Fan and Condenser Fan
Two Way Flow Heater
104
164
110
162
156
158
7.5A
OBD
Electronically Controlled Transmission and A/T Indicator
Engine Control
98
48
10A
GAUGE
ABS, TRAC and VSC
Air Conditioning
Audio System
Back–Up Light
Charging
Combination Meter
Door Lock Control
Electronically Controlled Transmission and A/T Indicator
Engine Control
Fog Light
Key Reminder
Light Reminder
Power Window
PTC Heater
Rear Window Defogger
Seat Belt Warning (Before Dec. 2005 Production)
Seat Belt Warning (From Dec. 2005 Production)
Shift Lock
SRS (Before Dec. 2005 Production)
SRS (From Dec. 2005 Production)
Taillight and Illumination
Turn Signal and Hazard Warning Light
Two Way Flow Heater
Wireless Door Lock Control
104
164
146
72
46
150
82
98
48
60
126
138
78
162
144
128
130
124
114
118
66
62
158
90
10A
HAZ
Turn Signal and Hazard Warning Light
62
STOP
ABS, TRAC and VSC
Electronically Controlled Transmission and A/T Indicator
Engine Control
Shift Lock
Stop Light
104
98
48
124
70
7.5A
10A
∗ These are the page numbers of the first page on which the related system is shown.
175
SCION xB (EM0091U)
J POWER SOURCE (Current Flow Chart)
Fuse
System
Page
10A
TAIL
Engine Control
Light Reminder
Taillight and Illumination
15A
ACC
Audio System
Cigarette Lighter
Remote Control Mirror
146
140
136
15A
FOG
Fog Light
60
20A
WIPER
Front Wiper and Washer
Rear Wiper and Washer
74
76
25A
D/L
Door Lock Control
Wireless Door Lock Control
82
90
30A
DEF
Rear Window Defogger
144
30A
POWER
Power Window
78
HTR
Air Conditioning
PTC Heater
Two Way Flow Heater
164
162
158
40A
48
138
66
Fusible Link Block (See Page 23)
Fuse
60A
System
Page
ABS
ABS, TRAC and VSC
104
60A
MAIN
ABS, TRAC and VSC
Charging
Combination Meter
Electronically Controlled Transmission and A/T Indicator
Engine Control
Seat Belt Warning (From Dec. 2005 Production)
SRS (Before Dec. 2005 Production)
SRS (From Dec. 2005 Production)
Starting and Ignition
104
46
150
98
48
130
114
118
42
120A
ALT
ABS, TRAC and VSC
Charging
104
46
Fuse Block (F15 on See Page 30)
Fuse
7.5A
I/UP
System
Rear Window Defogger
∗ These are the page numbers of the first page on which the related system is shown.
176
SCION xB (EM0091U)
Page
144
Memo
177
SCION xB (EM0091U)
K CONNECTOR LIST
A1
A2
A3
Black
Gray
Gray
A4
2
1
1
2
1
6
A5
A6
Black
2
A7
2
3
7
4
8
5
9
A8
A9
Blue
12
1
1
2
Yellow
A
1 2
3 4
1 2 3 4 5 6 7 8
B
1 2 3 4 5 6
7 8 9 101112
1 2 3
A10
A11
A12
A13
Yellow
Yellow
Yellow
Yellow
1 2 3 4
1 2 3 4
A B
A
1
B
4 5 6
7 8 9 1011121314151617
1819 2021 22 23 2425 26 27 28
A15
A16
2 1
2 1
A14
1 2 3 4 5 6
7 8 9 101112
A17
A18
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12
15 16 17 18 19 20 21 22 23 24 25 26 27 28
13 14 15 16 17 18 19 20 21 22 23 24
A19
A20
A21
B1
Yellow
Yellow
Yellow
Gray
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
178
SCION xB (EM0091U)
1
2
K
B2
B3
B4
Gray
Black
Black
B5
B6
1
1
2
1 2
2
B8
1
2
3
4
4 5 6
B10
Gray
1
2
4
3
5
C3
1 2 3
1 2
3 4
B9
1 2 3
B7
1
6
2
C1
C2
Black
Black
1 2
1 2
C4
C5
C6
2
1 2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Black
1
1
2
C7
C8
Black
1 2
C9
C10
Black
Black
3 4
5 6 7 8 9 10 11 12 13
1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5
6 7 8 9 10
7 8 9 10 11 12
D1
D2
D3
1 2
3 4
1 2 3 4 5
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
179
SCION xB (EM0091U)
K CONNECTOR LIST
D4
1
2
3
10
11
D5
D6
D7
D8
1
1
1
1
12
4 5 6 7 8 9
13 14 15 16 17 18 19
20 21 22 23 24 25 26
D9
D10
Black
Black
D11
1 2 3 4 5 6
1 2 3 4 5 6
D12
1
1 2 3
4 5 6
3 4 5 6
7 8 9
10 11 12 13 14 15 16 17 18
D13
D14
E1
E2
Black
Black
Gray
Gray
1 2
1
2
1
2
E3
1
2
3
4
6
7
8
9 10
5
E4
E5
Black
1
2
3
4
5
6
7
1
8 9 10 11 12 13 14 15 16 17
2
3
4
5
1
6
2
3
4
5
6
7
7 8 9 10 11 12 13 14 15 16
8 9 10 11 12 13 14 15 16 17
18 19 20 21 22 23
24 25
17 18 19 20 21 22 23 24 25 26 27
18 19 20 21 22 23 24 25 26 27
26 27
30 31
28 29 30
28 29 30 31 32
28 29
E6
31 32 33 34 35
33 34
F1
F2
F3
Yellow
Yellow
Brown
1
1
1
1
2
3
4
5
6
7
2
2
8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23
24 25
26 27
28 29 30 31
32 33
34 35
180
SCION xB (EM0091U)
2
2
K
F4
F5
F6
F7
1
F8
Black
Brown
2
1 2 3
1 2 3
F9
Black
Black
(See Page 23)
1 2 3
1
4 5
F10
F11
12
F12
F13
F14
Gray
Gray
Dark Gray
1
1
2
2
3
3
5
1
1
2
F15
2
4
3
5
F16
F17
G1
Yellow
Yellow
Black
1
1
G2
1
1
2
3
4
H1
H2
1
2
3
H4
H5
Gray
Black
Black
1
2
2
H3
1
2
1
2
3
H6
1
3
5
1 2
3 4
3
1
H7
H8
I1
I2
I3
Gray
Gray
Black
Black
Gray
1 2 3
1 2 3 4
1 2 3 4
1
2
3
4
1
2
2
I4
I5
I6
I7
I8
Black
Gray
Black
Gray
Black
1 2 3 4
1 2 3 4
1 2
1 2
1 2
I9
I10
I11
I12
I13
Gray
Gray
1 2
1
4
2
5
3
6
1 2 3
1 2 3 4
1
6
2 3 4
5
7 8 9 10
181
SCION xB (EM0091U)
K CONNECTOR LIST
*1 : Before Dec. 2005 Production
*2 : From Dec. 2005 Production
I14
I15
J1
A A B
C C
A A B B B B C C
1 2 3
1
2
J4
J4
(*1)
(*2)
J2
J3
Black
Black
A A B B C C
A A B B C C
D D E E F F
D D E E F F
J5
A A A B B B C C C C C
A A A B B B B C C C C
A A A A A A A A A A A
D D D D E E E E E E E
D D D E E E E F F F F
B B B B B B B B B B B
J6
J7
J8
J9
A A B B C C
A A B B C C
A A B
C C
A A B B B B C C
A A B
C C
A A B B B B C C
D D E E F F
D D E E F F
J10
L1
M1
N1
Blue
Black
Gray
1 2
1 2 3 4 5
1 2
A A B
C C
A A B B B B C C
N2
K1
Black
N3
N4
O1
O2
1 2
O3
Gray
1
2
1
2
1
1
2
1
1 2 3 4 5 6 7 8
9 10111213141516
O4
1 2 3
4 5
O5
O6
O7
Black
Gray
Black
1 2 3 4 5 6
7 8 9 101112
1 2 3 4 5 6
7 8 9 101112
6 7 8 9 10 11 12 13 14 15 16
182
SCION xB (EM0091U)
1 2 3
K
O8
O9
O10
P1
P2
Black
Black
Black
Black
Black
1 2 3
1 2 3
1 2 3
1 2 3
P3
1 2 3
P5
1
1
P6
P7
P8
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
2
P9
P10
1
2
3 4 5 6
P11
1
2
1 2
3 4 5 6
P15
P12
1 2
R1
R2
Gray
Blue
1
1
2
1
2
R4
2
3
5
3 4 5 6
R7
2
3 4 5 6
R11
1
2
1
R6
1 2 3 4 5 6 7 8 9 10
1
2
R5
R10
3 4
5 6 7 8 9 10
1
P14
Yellow
R3
1 2
1 2 3 4 5 6
P13
Yellow
R12
1
1
2
2
1
R8
2
1
3 4 5 6
R9
2
3 4 5 6
R13
R14
Black
Black
1
1
2
1
2
R15
R16
1 2
2 1
4 3
6 5
183
SCION xB (EM0091U)
K CONNECTOR LIST
R17
R18
2 1
S1
S2
Black
Black
1 2
1 2
1 2 3 4 5 6 7 8 9 10
4 3
11 12 13 14 15 16 17 18 19 20
6 5
S3
S4
S5
Black
S6
Black
1
1
1
2
31
32
1 2 3 4 5
3 4 5 6 7 8 9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24 25 26 27 28 29 30
33 34 35 36 37 38 39 40 41 42 43 44 45 46
S7
S8
S9
T1
T2
Gray
Black
Gray
Black
Black
1 2 3
1
1 2 3 4 5 6 7 8 9 10
3
2
1
1 2 3 4
4
T3
T4
T5
Black
Blue
Blue
1 2
1 2
U1
V1
V2
Black
Black
12345
W1
Y1
Black
Black
1 2 3
1 2
1
1 2 3 4 5
184
SCION xB (EM0091U)
2
1 2
2
Memo
185
SCION xB (EM0091U)
K CONNECTOR LIST
EA1
EB1
1 2
1
3 4
2
5
6 7
8 9 10 11 12
13
14
15
2
Gray
2 1
1
7 6
5
4 3
12 11 10
9 8
14
13
15
IA1
3 4
4 3
5 6
7
8 9
9 8
10 11
12
13 14
14 13
1 2
2 1
7
6 5
12 11 10
IA2
IA3
Yellow
2 1
1 2 3 4 5 6 7 8 9 10 11
11 10 9 8 7 6 5 4 3 2 1
12 13 14 15 16 17 18 19 20 21 22
22 21 20 19 18 17 16 15 14 13 12
4 3
1 2
3 4
IB1
IB2
Gray
1 2 3 4 5 6 7
7 6 5 4 3 2 1
8 9 10 11 12 13 14
14 13 12 11 10 9 8
1 2 3
4 5
6 7 8 9 10 11 12 13
186
SCION xB (EM0091U)
Gray
5 4
3 2 1
13 12 11 10 9 8 7 6
K
IC1
1 2
3
IC2
2 1
1 2 3 4 5 6 7
7 6 5 4 3 2 1
9 8 7 6 5 4
8 9 10 11 12 13 14
14 13 12 11 10 9 8
3
4 5 6 7 8 9
ID1
IE1
12
3
456 7 8
2 1
4 3
1 2
3 4
Blue
3
21
87 654
IF1
1 2 3 4 5 6 7 8 9 10
11 1213141516171819 20
IF2
10 9 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7
7 6 5 4 3 2 1
20 1918171615141312 11
8 9 10 11 12 13 14
14 13 12 11 10 9 8
IG1
1 2
3
IG2
2 1
1 2 3 4 5 6 7
7 6 5 4 3 2 1
9 8 7 6 5 4
8 9 10 11 12 13 14
14 13 12 11 10 9 8
3
4 5 6 7 8 9
IH1
1
3
2
4
5
6
BA1
2
6
5
4
1
3
BB1
1 2
3 4
5 6
1 2
2 1
4 3
6 5
3 4
5 6
2 1
4 3
6 5
187
SCION xB (EM0091U)
K CONNECTOR LIST
BC1
BC2
1 2
3 4
5 6
2 1
1 2
3 4
4 3
BD1
Gray
2 1
4 3
1
1
6 5
BE1
1 2 3
3 2 1
4 5 6
6 5 4
188
SCION xB (EM0091U)
Memo
189
SCION xB (EM0091U)
L PART NUMBER OF CONNECTORS
Code
Part Number
Code
A1
A/C Condenser Fan Resistor
Part Name
90980–10928
C8
Combination SW
90980–12007
A2
A/C Magnetic Valve
90980–11156
C9
Combination SW
90980–12008
C10
Canister Pump Module
90980–12380
D1
Data Link Connector 3
90980–11978
A/T Indicator Light SW
A3
Back–Up Light SW
90980–11784
Park/Neutral Position SW
A4
ABS Speed Sensor Front RH
A6
A/C Thermistor
90980–11002
90980–11918
A/T Shift Lever Illumination
A7
O/D Main SW
90980–10795
Inlet Air Position Detection SW
Door Control Receiver
90980–11909
D4
Door Lock Control Relay
90980–12203
D5
Door Courtesy SW Front LH
D6
Door Courtesy SW Front RH
Air Inlet Servo Motor
90980–11989
D7
Door Courtesy SW Rear LH
A9
Airbag Sensor Assembly
90980–11869
D8
Door Courtesy SW Rear RH
A10
Airbag Sensor Assembly
90980–11872
A11
Airbag Sensor Assembly
90980–11867
A12
Airbag Squib (Front Passenger’s Airbag
Assembly)
90980–12160
Airbag Squib (Steering Wheel Pad)
A14
Antenna Amplifier
A15
ABS Speed Sensor Rear LH
Door Lock Motor Front LH
90980–10870
90980–10859
A/C Amplifier
90980–12410
A18
A/C Amplifier
90980–12200
A19
Airbag Sensor Assembly
90980–12449
A20
Airbag Sensor Assembly
90980–12391
A21
Airbag Sensor Assembly
Door Lock Motor Front RH
Door Lock Control SW Front LH
D11
ABS Speed Sensor Rear RH
90980–11858
Door Key Lock and Unlock SW Front RH
D10
A17
90980–10871
Door Key Lock and Unlock SW Front LH
D9
Door Unlock Detection SW Front LH
A16
90980–10795
D3
A8
A13
Part Number
Defroster Mode Detection SW
D2
ABS Speed Sensor Front LH
A5
Part Name
Power Window Master SW
90980–12122
D12
Door Lock Control SW Front RH
90980–10797
D13
Door Lock Motor Rear LH
D14
Door Lock Motor Rear RH
E1
Electronically Controlled Transmission
Solenoid
90980–11658
90980–12450
E2
Engine Coolant Temp. Sensor
90980–10735
Engine Control Module
90980–12142
90980–11019
B1
Back–Up Light SW
90980–11250
E3
B2
Brake Fluid Level Warning SW
90980–11207
E4
Engine Control Module
90980–12146
B3
Blower Motor
90980–10214
E5
Engine Control Module
90980–12144
B4
Blower Resistor
90980–11136
E6
Engine Control Module
90980–12145
F1
Front Airbag Sensor LH
F2
Front Airbag Sensor RH
F3
Front Fog Light LH
F4
Front Fog Light RH
Back Door Courtesy SW
B5
B6
Back Door Lock Motor
Back Door Opener SW
90980–10795
90980–12063
Buckle SW LH
B7
Seat Position Sensor
90980–12257
Occupant Detection Sensor
90980–11020
90980–11194
Front Turn Signal Light LH
Front Parking Light RH
F6
Buck SW LH
B9
90980–11096
Front Parking Light LH
F5
Buckle SW RH
B8
90980–12401
90980–11020
Front Turn Signal Light RH
F7
Front Wiper Motor
90980–11599
B10
Buck SW RH
90980–11156
F8
Fusible Link Block
82620–52011
C1
Camshaft Position Sensor
90980–10947
F9
Fusible Link Block
90980–11775
C2
Camshaft Timing Oil Control Valve
90980–11162
F10
Front Fog Light Relay
82660–20340
C3
Crankshaft Position Sensor
90980–12028
F11
Front Fog Light SW
90980–10489
C4
Cigarette Lighter
90980–10760
F12
Front Door Speaker LH
C5
Clutch Start SW
90980–10825
F13
Front Door Speaker RH
C6
Combination Meter
90980–12169
C7
Combination SW
90980–12183
Seat Position Sensor
90980–10935
Fuel Pump
F14
Fuel Sender
Note: Not all of the above part numbers of the connector are established for the supply.
190
SCION xB (EM0091U)
90980–11077
L
Code
Part Name
F15
Fuse Block
F16
Front Airbag Sensor LH
Part Number
Code
82610–20080
O2
Option Connector (TVIP)
90980–10871
O3
Option Connector (IPOD Unit)
90980–12553
90980–12490
Part Name
Part Number
F17
Front Airbag Sensor RH
O4
Option Connector (Radio and Player)
90980–12423
G1
Generator
90980–11349
O5
Occupamt Classification ECU
90980–12356
G2
Generator
90980–09373
O6
Occupamt Classification ECU
90980–12357
H1
Headlight LH
O7
Occupamt Classification Sensor Front LH
H2
Headlight RH
O8
Occupamt Classification Sensor Rear LH
H3
Heated Oxygen Sensor (Bank 1 Sensor 1)
O9
Occupamt Classification Sensor Front RH
H4
Horn (High)
O10
Occupamt Classification Sensor Rear RH
P1
Power Steering Oil Pressure Sensor
90980–11314
90980–10869
90980–10619
90980–12353
H5
Horn (Low)
H6
Headlight Relay
82660–20340
P2
Pressure Sensor
H7
Heated Oxygen Sensor (Bank 1 Sensor 2)
90980–11028
P3
Parking Brake SW
90980–10871
H8
High Mounted Stop Light
90980–11148
P5
PTC Heater
90980–10903
I1
Idle Air Control Valve
90980–11145
P6
Power Window Control SW Front RH
I2
Ignition Coil and Igniter No.1
P7
Power Window Control SW Rear LH
I3
Ignition Coil and Igniter No.2
P8
Power Window Control SW Rear RH
I4
Ignition Coil and Igniter No.3
P9
Power Window Motor Front LH
I5
Ignition Coil and Igniter No.4
P10
Power Window Motor Front RH
I6
Injector No.1
P11
Power Window Motor Rear LH
I7
Injector No.2
P12
Power Window Motor Rear RH
I8
Injector No.3
P13
Pretensioner LH
I9
Injector No.4
P14
Pretensioner RH
I10
Ignition SW
90980–11778
P15
Passenger Seat Belt Warnning Lamp
90980–11986
I11
Integration Control and Panel
90980–10908
R1
Radiator Fan Motor
90980–10928
I12
Integration Control and Panel
90980–11013
R2
Radio and Player
90980–10997
I13
Integration Control and Panel
90980–10993
R3
Radio and Player
90980–10996
I14
Interior Light
90980–10935
R4
Rear Window Defogger Relay
82660–20340
I15
Integration Control and Panel
90980–10908
R5
Remote Control Mirror SW
90980–11657
90980–11542
R6
Rheostat
R7
Rear Combination Light LH
R8
Rear Combination Light RH
R9
Rear Side Marker Light LH
R10
Rear Side Marker Light RH
R11
Rear Speaker LH
R12
Rear Speaker RH
R13
Rear Window Defogger
R14
Rear Window Defogger
R15
Rear Wiper Motor
J1
Junction Connector
J2
Junction Connector
J3
Junction Connector
J4
Junction Connector
J5
Junction Connector
J6
Junction Connector
90980–11885
90980–11875
90980–11661
90980–11915
90980–11661
90980–10845
90980–10789
90980–10797
90980–10860
90980–12253
90980–10797
90980–11250
90980–10935
J7
Junction Connector
J8
Junction Connector
J9
Junction Connector
J10
Junction Connector
K1
Knock Sensor (Bank 1)
90980–11875
R16
Remote Control Mirror LH
L1
License Plate Light
90980–10825
R17
Remote Control Mirror RH
M1
Mass Air Flow Meter
90980–11317
R18
Radio and Player
N1
Noise Filter (Ignition)
90980–10843
S1
Side Turn Signal Light LH
N2
Noise Filter (Rear Window Defogger No.1)
S2
Side Turn Signal Light RH
N3
Noise Filter (Fuel Pump)
S3
Skid Control ECU with Actuator
90980–12297
N4
Noise Filter (Stop Light and Rear Window
Defogger No.2)
S4
Starter
90980–09506
S5
Starter
90980–11400
O1
Oil Pressure SW
90980–11542
90980–10916
90980–11853
90980–10860
90980–11587
90980–12460
90980–11162
90980–11363
191
SCION xB (EM0091U)
L PART NUMBER OF CONNECTORS
Code
Part Number
Code
S6
Shift Lock Control SW
Part Name
90980–11909
T4
Tweeter LH
Part Name
S7
Steering Sensor
90980–12162
T5
Tweeter RH
S8
Stop Light SW
90980–11118
U1
Unlock Warning SW
S9
Stereo Jack Adapter
82824–21030
V1
VSV (Purge)
90980–11156
T1
Throttle Position Sensor
90980–11261
V2
VSC Buzzer
90980–10906
T2
Turbine Speed Sensor
90980–11156
W1
Washer Motor
90980–10981
T3
TRAC OFF SW
90980–10631
Y1
Yaw Rate Sensor
90980–11904
Note: Not all of the above part numbers of the connector are established for the supply.
192
SCION xB (EM0091U)
Part Number
90980–10860
Memo
193
SCION xB (EM0091U)
1 xB
B–Y
B–R
B–R
10A GAUGE
W–R
B
Charge
B–R
C5
Clutch Start SW
R–B
G–Y
B–R
G–O
B–R
G–B
B–R
G–R
B–R
B–R
B–Y
(M/T)
B–Y
Engine Control
Module< 2–8>
G–B
L
I5
Ignition Coil and
Igniter No. 4
Y
A/C Amplifier
< 18–3>
B–Y
B–Y
(M/T)
N1
Noise Filter
(Ignition)
B–Y
(A/T)
B–W
30A ST
15A AM2
I4
Ignition Coil and
Igniter No. 3
I3
Ignition Coil and
Igniter No. 2
I2
Ignition Coil and
Igniter No. 1
B–L
B–G
B–R
B
Y
W–B
Y
W–B
Y
W–B
Y
W–B
F 8(A), F 9(B)
Fusible Link Block
60A MAIN
120A ALT
Y
Y
W–B
L
B–R
W–B
G 1(A), G 2(B)
Generator
Battery
S 4(A), S 5(B)
Starter
W–B
1
B B
2
IG A
R–B
M A
L
9 IF1
4 IF1
11 IF1
3
Engine Control Module< 2–10>
C6
Combination Meter
B
(M/T)
B
(A/T)
Engine Control
Module< 2–8>
B
(A/T)
A3
Park/Neutral
Position SW
W–R
W–L
40A AM1
Engine Block
ED
M
197
Front Left
Fender Apron
EB
W–B
W
1 B
1 A
1
A
B–R
2
2
2
16
SCION xB (EM0091U)
W–B
4
4
4
2
5 EA1
4
3 A
4 A
1 B
40
11 EA1
L
B
3
B–Y
Y
Y
1
3
1
B–R
B–R
1
3
2
B–Y
(M/T)
B–Y
12 EA1
11 IF2
Engine Control Module< 2–9>
1
1
1
3 1A
6 1E
3
3
1
B–Y
B–R
B
1
1 EA1
ST
Relay
1
1 1C
1
5
1
1
1
1
1
P
5 1E
15 EA1
13 IF2
8 1G
6 1O
7 1O
B–R
2
1
1
6
2
2
2
9
B–W
B
(A/T)
B
(A/T)
Engine Control
Module< 2–8>
N
8 1O
B
4
IF2
7 1A
B
ST2 4
B
(M/T)
I10
Ignition SW
1 1O
IG2 6
5 AM2
B–Y
IG1 2
1 AM1
W–L
4
3
2
1
C h a rg in g
S ta rtin g a n d Ig n itio n
P o w e r S o u rc e
ACC
B
4 1O
P o w e r S o u rc e
E n g in e C o n tro l
1
4
3
2
B–R
B–Y
Y–R
Y–B
GR
5 AM2
IG2 6
B
C
D
E
B
6 1O
B–R
I10
Ignition SW
B–R
B–R
W–R
ST2
1 1O
A
5 1O
8 1G
GR
W–R
W–R
B–Y
B–Y
B–Y
5
EFI Relay
15A EFI
15A AM2
3
2
C6
Combination Meter
2
3
1
3
2
C/OPN
Relay
1
B–Y
W–B
B–L
B–G
6 1T
3
8 1H
B–R
G–R
B–R
4 EA1
9 1H
Water Temp.
Cool
5
1
Water Temp.
Hot
1
4
40
11 1A
Malfunction
Indicator Lamp
1
1
1
Y–B
1
Y–R
1
2
2
1 1C
B–R
1
1
4 1P
7. 5A OBD
SCION xB (EM0091U)
7 1A
7 1H
20
B–R
5
N3
Noise Filter
(Fuel Pump)
F14
Fuel Pump
60A MAIN
120A ALT
1
M
Y–G
B
4
Y–G
B–R
F8
Fusible Link Block
W–B
B–R
G–R
W–B
B
Battery
W–R
Front Left
Fender Apron
EB
BJ
Rear Quarter
Panel Inner LH
F
G
H
I
J
K
M OVERALL ELECTRICAL WIRING DIAGRAM
198
(Cont. next page)
2 xB
2 xB (Cont' d)
(Cont. next page)
∗ 1 : Shielded
∗ 2 : Before Dec. 2005 Production
∗ 3 : From Dec. 2005 Production
E n g in e C o n tro l
A
D
E
8
7
6
B–Y
B–R
B
C
5
B–R
Y–R
Y–B
1 IF1
GR
Stop Light SW< 9–3>
Combination Meter< 16–3>
Generator< 1–4>
G–W
V–W
L
OX1A
HT1A
21 C
OX1B
1 C
STA
30 A
NSW
10 C
ALT
8 B
4 B
SPD
STP
B–R
+B
VISC
GND
2
3
E1
2
1
Multiplex Communication
System (CAN)< 13–11>
DUTY
I1
Idle Air Control Valve
HT
H7
Heated Oxygen Sensor
(Bank 1 Sensor 2)
B–R
1
OX
BR
B
(∗1)
B
BR
14 IF2
13 IF2
BR
B
B
B
BR
BR
B
BR
B
3
4
1 IF2
CANL
34 B
W
+B
2
(∗1)
E1
4
33 B
W
HT
2
Skid Control ECU
with Actuator< 13–5>
9 IF2
L
(∗1)
1
OX
H3
Heated Oxygen Sensor
(Bank 1 Sensor 1)
3
CANH
5 C
B–R
W
(∗1)
1
RSD
2 C
L
2 IF2
J 4(A), (B)
Junction
Connector
E A (∗2)
E B (∗3)
HT1B
25 C
(∗1)
EC
B
(A/T)
PRG
23 D
(∗1)
IE
12 A
# 40
G–R
B
B
B
(∗1)
BR
(∗1)
A
B
C
D
E
Engine Block
M
199
Left Kick
Panel
B–Y
1 D
# 30
G–R
W–R
I9
Injector No. 4
B–L
B–W
2 D
# 20
15
B–R
B–R
B–Y
FC
25 A
B–R
BR
K
Y–G
5 D
B
J
# 10
W–G
I
+B
1 A
V1
VSV (Purge)
H
+B2
2 A
G–R
G
IGSW
9 A
R
F
6 D
BATT
R
15 IF1
3 A
HOT
E B (∗3)
Multiplex
Communication
System (CAN)< 13–12>
1 1E
WFSE
29 B
COOL
E A (∗2)
7 1P
BR
W–B
Skid Control ECU
with Actuator
< 13–5>
2 1O
6
BR
17 1P
CANH
30 B
Airbag Sensor
Assembly
< 14–3> < 19–3>
B–R
CANL
14
W
TC
B–R
SG
5
W–B
R–L
W–R
CG
4
MREL
E 3(A), E 4(B), E 5(C), E 6(D)
Engine Control Module
B–R
TS
12
18 B
8 A
TACH
Y–G
BAT
16
13
TAC
B–O
1 B
P–B
B
9
SIL
B–Y
17 B
P–B
W
7
Y–R
4 1D
3 1P
TC
D1
Data Link
Connector 3
Y–B
GR
A A
2
B
A A
P–B
5 1P
2
14 1H
J 6(A), J 7(B)
Junction
Connector
C B
2
I8
Injector No. 3
14 IA1
1
I7
Injector No. 2
I6
Injector No. 1
P–B
B
B
W
W
W
SCION xB (EM0091U)
5 1B
1
Ignition SW< 1–1>
1
2
1 1D
12 1H
B–R
B–R
B–R
B–Y
GR
1
7 IA2
B–R
Park/Neutral Position SW (A/T)< 1–2>
Clutch Start SW (M/T)< 1–2>
B–R
Combination
Meter< 16–3>
Skid Control ECU
with Actuator
< 13–5>
Occupant
Classification
ECU< 19–6>
Airbag Sensor
Assembly
< 14–3> < 19–3>
B–R
E n g in e C o n tro l
9
∗ 1 : Shielded
12
11
10
W–B
GND
6 A
5 A
MPMP
VPMP
OC1–
1
3
IB1
R–W
8
IF2
R–W
R–W
D
R–W
12 C
OC1+
R–W
13 C
IGF
VC
3
R
23 C
IGT1
R
17 C
IGT2
2 IB1
P
16 C
VCC
4
3
1 IB1
V
IGT3
VOUT
P
V
15 C
C
R–W
8
8 IB1
B
2
Y–R
1
BR
A
T1
Throttle Position
Sensor
Vent Valve
6
B
IGT4
BR
E2
B
+B
R–B
14 C
ELS1
7
IF2
VTA
GND
R–Y
Y
G–R
G–B
G–O
G–Y
G
B–Y
15 A
ELS2
BR
Canister Pressure
Sensor
4 IB1
C2
Camshaft Timing Oil
Control Valve
7. 5A I/UP
F15
Fuse Block
3 B
9
IB1
B
BR
R–B
Combination SW
< 6–2>
B
SCION xB (EM0091U)
2
2
BR
SGND
M
1
1
B
2
+B
Leak Detection Pump
Ignition Coil and
Igniters< 1–3> < 1–4>
10
IB1
C10
Canister Pump Module
W–B
Rear Window
Defogger Relay < 17–4>
9
W–B
B
20 C
31 A
PTMK
18 C
VTA1
VC
E 3(A), E 4(B), E 5(C), E 6(D)
Engine Control Module
FANH
14 A
FANL
13 A
F/PS
32 B
NEO
7 B
E1
KNKI
EKNK
3 C
NE+
29 C
30 C
27 C
G2+
NE–
E01
26 C
34 C
7 C
E02
6 C
E03
4 D
W
BR
V
B
Y–R
W–L
BR
B
W
2
BR
(∗1)
C1
Camshaft Position
Sensor
1
(∗1)
(∗1)
K1
Knock Sensor
(Bank 1)
B
1
2
W
1
W
O
C3
Crankshaft Position
Sensor
W
Skid Control ECU
with Actuator< 13–4>
Airbag Sensor
Assembly
< 14–3> < 19–3>
FAN NO. 1
Relay< 17–2>
FAN NO. 2
Relay< 17–2>
2
BR
W
1 EB1
BR
B
2 EB1
B
BR
B
C
B
B
B
(∗1)
(∗1)
(∗1)
BR
BR
B
BR
BR
E
BR
BR
D
BR
BR
E
BR
A
BR
(∗1)
Engine Block
EC
ED
Engine Block
F
M OVERALL ELECTRICAL WIRING DIAGRAM
200
(Cont. next page)
2 xB (Cont' d)
2 xB (Cont' d)
E n g in e C o n tro l
13
A
B
C
14
15
16
W–B
B
BR
BR
BR
BR
BR
1
VOUT
2
BR
2
Y
R–W
W–B
BR
R–W
32 C
PSP
THW
BR
R–L
32 D
28 C
E2
E 3(A), E 4(B), E 5(C), E 6(D)
Engine Control Module
THA
29 D
E2G
30 D
10 IF1
VG
EC
22 A
28 D
VG
B
20
IF1
BR
3
W–B
2
E2G
BR
V
4
THA
P
Y–B
SCION xB (EM0091U)
D
1
E2
Engine Coolant Temp. Sensor
VC
3
P1
Power Steering Oil
Pressure Sensor
GND
W–B
5
M1
Mass Air Flow
Meter
E2
+B
1
E
BR
B
F
B
B
IG
Engine
Block
ED
M
201
Right Kick
Panel
P o w e r S o u rc e
E le c tro n ic a lly C o n tro lle d T ra n s m is s io n a n d A /T In d ic a to r
1
B–Y
IG1 2
B–R
B–Y
3
4 1O
RB
R–B
10A
GAUGE
IG2 6
5 AM2
PL
RL
NL
DL
2L
LL
1
2
5
7
4
8
16 IF1
19 IF1
7 IF1
6 IF1
5 IF1
G–W
G–R
R–Y
GR
R–W
R
7 1A
8 IF1
G–W
R–B
8 1G
G
6 1O
R–Y
R
B
5 1E
I10
Ignition SW
GR
9 IF1
R–W
W–R
ST2
1 1O
A
R–B
A3
A/T Indicator Light SW
W–L 1 AM1
4
3
2
B–R
ACC
17 1G
4 1H
18 1G
G–W
G–R
G–R
R–Y
R–Y
G–W
G–R
GR
GR
B
R
B–Y
W–B
27 D
B–L
B–G
NT+
R
33 B
8 A
NT–
MREL
34 B
CANH
CANL
11 B
21 B
10 B
9 B
R
D
2
L
B
C
D
E
F
G
E 3(A), E 4(B), E 5(C)E 6(D)
Engine Control Module
+B
S1
S2
ST
1 A
9 D
8 D
19 D
+B2
SLT+
SLT–
12 D
13 D
SL
11 D
THO1
24 D
E2
28 C
E01
7 C
THW
32 C
E1
EC
3 C
22 A
G
4
BR
O
G–O
2 1O
6
W–B
W–B
Front Left
Fender Apron
G–O
Engine Control System
< 2–6> < 2–8> < 2–12> < 2–13>
E2
E1
ODLP
14 B
13 1P
B–Y
Electronically Controlled Transmission
Solenoid
ODMS
6 B
W–B
LG
GR
Y
B
W
11 1A
EB
VTA1
20 C
G–B
1
OT
VC
18 C
A7
O/D Main SW
4
SL
STA
12 A
W–B
8
SLT–
SPD
8 B
BR
3
SLT+
TC
17 B
BR
2
ST
STP
4 B
O
10
S2
NSW
30 A
BR
Y–G
G
W
W–L
B–R
W–R
W–G
8 1H
F8
Fusible Link Block
5
S1
E03
4 D
2
B–R
120A ALT
60A MAIN
B–R
E02
6 C
BR
BR
B–R
3
Battery
6 1H
R–W
BATT
2 A
4
1 1G
3 1E
R
Skid Control ECU
with Actuator< 13–5>
35 D
3 A
16 1H
4 1E
R–Y
7 IA2
2
1 1C
1
16 1G
R–W
1
13 1H
2 1E
R
1
1
E A
R
B–Y
3
T2
Turbine Speed Sensor
5
E A
9 1E
R–W
14 IA1
GR
1
EFI Relay
15A EFI
15A AM2
1
1
Multiplex Communication
System (CAN)< 13–11>
GR
W–R
W–L
1
2
1
B
1
2
2
2
B–Y
J 6(A), J 7(B)
Junction Connector
E B
1
1
8 1O
40A AM1
SCION xB (EM0091U)
GR
B–Y
BR
Engine
Block
ED
Engine
Block
EC
Right
Kick
Panel
IG
IE
Left Kick
Panel
H
M OVERALL ELECTRICAL WIRING DIAGRAM
202
(Cont. next page)
3 xB
3 xB (Cont' d)
E le c tro n ic a lly C o n tro lle d T ra n s m is s io n a n d A /T In d ic a to r
A
D
E
F
7
8
G–W
G–R
R–Y
GR
R–W
9
10
11
B–R
8
G–W
7
G–R
6
R–Y
R
GR
G
6
R–W
40
O/D OFF
SCION xB (EM0091U)
B
C
5
B–R
L
2
D
N
R
P
C6
Combination Meter
21
12
BR
H
G–O
IF
M
203
Instrument Panel
Brace LH
P o w e r S o u rc e
H e a d lig h t
1
4
3
2
B–L
1
1
1
1
10A
H–LP LH/
H–LP LO LH
10A
H–LP RH/
H–LP LO RH
2
15A
DOME
2
1
2
1
1
B
B
B–R
3
J 6(A), J 7(B)
Junction Connector
1
B–Y
B–W
B B
L–Y
2
H2
Headlight RH
2
B–Y
1
B–W
9 1A
8 1A
10 1B
11 1B
4 1A
5 1M
2 1F
12 1G
5 IA2
B A
B A
B–L
7 1M
B–W
L–Y
B–Y
B–Y
B
B–W
1
3
8
H6
Headlight Relay
3
Light Control SW
5
+B
OFF
R
60A MAIN
2
F8
Fusible Link
Block
W–B
1
Dimmer SW
RF
H
C6
ED
EL
HL
HU
C8
Combination SW
Flash
Tail
Low
Head
High
14
11
6 1M
2 1O
W–B
IG
Right Kick
Panel
Combination
Meter
EL
W–B
Door Lock Control
Relay< 11–8>
Battery
T
9
Beam
SCION xB (EM0091U)
B B
3
H1
Headlight LH
Front Fog
Light SW
< 12–2>
B–W
B–W
IE
Left Kick
Panel
M OVERALL ELECTRICAL WIRING DIAGRAM
204
4 xB
5 xB
P o w e r S o u rc e
T u rn S ig n a l a n d H a z a rd W a rn in g L ig h t
1
2
H o rn
4
3
G–W
G–W
W–B
ACC
1 AM1
IG1 2
B–Y
TL
Turn
10A
GAUGE
TB
TR
C8
Combination SW
LH
RH
1
G–Y
G–B
W–L
G–W
5
6
7
ER
GND
EL
HORN
Relay
2 1M
1 1M
IG
5
2
3
1
1
FLSH Relay
EHW
2
LL
LR
8
3
2
4 1J
7 1B
6 1B
8 1O
W–R
1
2
C A (∗1)
B B (∗2)
C A
C A (∗1)
B B
B B (∗2)
W–R
W–R
5
13
5
1 A (∗1)
18
H4
Horn (High)
21
1
1
H5
Horn (Low)
W–B
C6
Combination
Meter
6 B (∗2)
Horn
Door Lock
Control Relay< 11–7>
1
C 7(A), (B)
Combination SW
RH
LH
Turn
W–B
W–B
W–B
R8
Rear Combination Light RH
Turn
W–B
1
G–R
G–R
W–B
G–Y
G–B
G–Y
G–B
3
2
W–B
BR
W–B
W–B
J 4(A), (B)
Junction
Connector
R7
Rear Combination Light LH
F6
Front Turn Signal Light RH
3
2
4 IA1
2 1O
G–Y
G–B
2
F5
Front Turn Signal Light
LH
On
W–B
Hazard
SW
I12
Integration Control and Panel
120A
ALT
F8
Fusible Link
Block
60A
MAIN
Door Lock Control
Relay< 11–7>
4
1
W–B
G–O
G–O
B–G
B–L
3
1
Off
C
2
1
C
S2
Side Turn Signal Light RH
W–B
9 1P
S1
Side Turn Signal Light LH
1 1H
2
G–Y
J1
Junction
Connector
J1
Junction
Connector
10 1G
1 1C
9 1F
C
A
A
1
14 1F
5 1T
W–R
A
G–B
1
8 1S
G–Y
G–B
G–O
10A HAZ
1
40A AM1
15A HORN
SCION xB (EM0091U)
G–W
1
3 1M
1
+B
1
7
5
4
G–W
I10
Ignition SW
G–W
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
6
W–B
4 1O
W–B
Battery
IE
Front Left
Fender Apron
EB
Front Right
Fender Apron
EA
BJ
Rear
Quarter
Panel
Inner LH
BK
Rear Quarter
Panel Inner RH
IF
Instrument
Panel Brace
LH
IE
Left Kick
Panel
M
205
Left Kick
Panel
206
P o w e r S o u rc e
G
L–Y
G
Engine Control
Module < 2–9>
C7
Combination SW
C8
Combination SW
G
G
G
G
G
G
G–O
G
L–Y
G–W
G
G
G
L1
License Plate Light
W–B
R10
Rear Side Marker
Light RH
W–B
R9
Rear Side Marker
Light LH
W–B
R8
Rear Combination
Light RH
Tail
R7
Rear Combination
Light LH
Tail
F6
Front Parking Light RH
B–G
B–L
F5
Front Parking Light LH
15A DOME
Audio System< 15–6>
10A TAIL
40A AM1
W–B
W–B
W–B
W–B
W–B
W–B
60A MAIN
F8
Fusible Link Block
120A ALT
W–B
W–B
Battery
W–B
W–B
W–B
4
BC2
W–B
6 BE1
5 BE1
2
1
1
1
2
2
Back Door
Center
BL
Rear Quarter
Panel Inner RH
BK
Rear Quarter
Panel Inner LH
BJ
Front Right
Fender Apron
EA
Front Left
Fender Apron
EB
1
1
2
2
1
1 1C
4
4
1
1
2 BC2
3 BE1
10
W–L
3
4
1
1
G
G
Light Control
SW
13
SCION xB (EM0091U)
Head
B
B
B
B
4 1A
Tail
2
2
B
OFF
2 BE1
1
4 1M
8 1O
12 1G
1
10
J9
Junction Connector
T
+B
9 1S
13 1B
12 1B
3 1R
9 1K
9 1M
I10
Ignition SW
4
3
2
1
C
L–Y
A
B–Y
B–Y
IG1 2
1 AM1
T a illig h t a n d Illu m in a tio n
ACC
B
M OVERALL ELECTRICAL WIRING DIAGRAM
(Cont. next page)
6 xB
6 xB (Cont' d)
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
T a illig h t a n d Illu m in a tio n
5
A
8
7
6
B–Y
B
10 1F
9 1R
2 1J
5 1N
8 1K
G
G
G
G
C
1 1P
R–B
L–Y
B–Y
1
26
23
I13
Integration Control and Panel
4
Illumination
5
10A GAUGE
Illumination
A7
A/T Shift Lever Illumination
3
3 1L
13 1G
R–B
G
G
W–G
W–G
21
C6
27
Combination Meter
G
W–G
BR
D B
5
1
D B
6
10 A
5 B
4
P15
Passenger Seat Belt
Warning Lamp
F A
R–B
4
R 2(A), R 3(B)
Radio and Player
R6
Rheostat
3
J 6(A), J 7(B)
Junction
Connector
SCION xB (EM0091U)
1
CPU
4 1O
5
W–B
W–G
W–G
W–G
W–G
W–B
R–B
B A (∗1)
7 1R
14 1P
6 1J
C B (∗2)
J 4(A), (B)
Junction Connector
B A (∗1)
2 1O
5 1K
2 1N
C B (∗2)
R–B
W–B
W–B
BR
IF
IE
Left Kick
Panel
M
207
Instrument Panel
Brace LH
P o w e r S o u rc e
1
4
3
2
ACC 3
1 AM1
W–L
C ig a re tte L ig h te r
In te rio r L ig h t
L–R
L–R
IG1
3 1O
I10
Ignition SW
15A
ACC
L–Y
L–Y
2
6 1N
5 1S
4 1A
ON
OFF
12 1G
R–W
R–W
R–W
R–W
R–W
R–Y
1 1C
Door Lock Control
Relay< 11–8>
R–W
Door
1
R–Y
L–Y
1
C6
Combination Meter
2
15A DOME
2
3 IB2
1
1
B–W
1
L–Y
W–L
8 1O
40A AM1
2
Door Lock Control
Relay< 11–7>
1
4 1L
3 1S
C4
Cigarette
Lighter
4 BC1
1
5 1G
B–L
B–G
SCION xB (EM0091U)
DOOR
I14
Interior Light
24
15
R–W
R–W
R–W
R–W
R–W
4
3
R–W
R
1
1 1S
W–B
R
Battery
1
W–B
Door Lock Control
Relay< 11–7>
B5
Back Door Courtesy SW
R
2
1
D8
Door Courtesy SW
Rear RH
8
1L
D6
Door Courtesy SW
Front RH
4 1G
1
D7
Door Courtesy SW
Rear LH
F8
Fusible Link Block
60A MAIN
120A ALT
1
D5
Door Courtesy SW
Front LH
BL
Back Door
Center
IE
Left Kick
Panel
M OVERALL ELECTRICAL WIRING DIAGRAM
208
7 xB
8 xB
P o w e r S o u rc e
B a c k – U p L ig h t
1
F ro n t W ip e r a n d W a s h e r
4
3
2
ACC
1 AM1
IG1 2
B–Y
W–L
B
I10
Ignition SW
C9
5 1A
4 1O
Combination SW
Front Wiper SW
20A WIPER
10A GAUGE
+B
2 1A
EW
R–B
W–L
+S
INT1
INT2
B1
+S
INT1
INT2
B1
INT
Off
LO
On
HI
9 IF1
W
8 1O
E
B
B
R–B
2
Wiper Relay
+B
40A AM1
3 A (A/T)
+S
1
1 1C
W
+B
+1
7
10 IA1
+S
6
GR
B–R
2 IA1
11 IA1
6 IA1
4
1
R8
Rear Combination
Light RH
Back–Up
R7
Rear Combination
Light LH
3
2
S
+
M
11 1N
E
F7
W–B
5
Front Wiper Motor
B–W
W–B
2 1O
W–B
BK
Left Kick
Panel
IE
Front Right
Fender Apron
EA
M
209
Rear Quarter Panel
Inner RH
W–B
Battery
BJ
1
+1
1
W–B
Rear Quarter Panel
Inner LH
4
+2
W–B
2
2
1
7 1S
M
R–B
R–B
2
Back–Up
9 1E
R–B
R–W
120A ALT
F8
Fusible Link Block
A
W1
Washer Motor
19 IF1
B
GR–B
GR
B–R
G
R–W
J9
Junction
Connector
A
A
+2
9
5
B
G
1 B (M/T)
EW
8
GR–B
4
2 A (A/T)
W–B
A 3(A)
Back–Up Light SW
B 1(B)
Back–Up Light SW
2 B (M/T)
B–G
SCION xB (EM0091U)
W
7 1N
+1
OFF
Washer SW
5 1E
+2
MIST
G–Y
Engine
Control
Module< 2–8>
G–R
G–W
G–W
G–W
G–W
G–W
G–W
G–W
G–W
3 BC2
Y
G–W
W–R
O
BR
B
L–R
G–W
Stop
Y
Y
W–B
R7
Rear Combination Light LH
Stop
R8
Rear Combination Light RH
W–B
Front Passenger
Seat Belt
Warning Light
Door Lock Control
Relay< 11–8>
4 BC2
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
Battery
BR
SRS System< 14–4>
Door Lock Control
Relay< 11–7>
W–B
U1
Unlock Warning SW
W–R
B7
Buckle SW LH
J 6(A), J 7(B)
Junction Connector
W–R
Buckle SW RH
Occupant Detection
Sensor< 14–2>
Interior Light
System< 7–1>
Taillight and
Illumination
System< 6–5>
60A MAIN
120A ALT
BL
Back
Door
Center
2
I13
Integration Control and Panel
W–R
O
B–L
B–G
1
1
H8
High Mounted
Stop Light
W–B
N4
Noise Filter
(Stop Light and
Rear Window Defogger No. 2)
SLS–
Rear Quarter
Panel Inner
RH
BK
Rear Quarter
Panel Inner
LH
BJ
IE
C
C
R–B
15A DOME
40A AM1
10A STOP
2 1O
16 1P
Stop Light SW
Skid Control
ECU with
Actuator< 13–6>
R–B
L–Y
L–Y
W–L
Buzzer
SCION xB (EM0091U)
1 1K
1
Left Kick
Panel
Right Kick
Panel
IG
IF
Instrument Panel
Brace LH
1
13 1L
19 1P
1
Shift Lock
Solenoid
2
F B
3
D A
D A
J9
Junction Connector
C
Belt
3
3
3
4
1
F8
Fusible Link Block
1 1F
9
12 IB1
13 IB1
STP
IG
3 1T
18 1P
G–Y
1
SLS+
E
25
35
32
33
21
24
26
1
1
1 1C
3
5
2
S6
Shift Lock
Control SW
1
CPU
2
2
23
C
1
8 1O
8 1B
C6
Combination Meter
1
2 1B
2 1H
1 1B
13 1G
12 1G
4 1A
S8
8 1R
4 1O
1
10A
GAUGE
I10
Ignition SW
2
IG1 2
1 AM1
W–L
R–B
ACC
S h ift L o c k
K e y R e m in d e r
S e a t B e lt W a rn in g
(B e fo re D e c . 2 0 0 5 P ro d u c tio n )
L ig h t R e m in d e r
P o w e r S o u rc e
4
3
2
1
S to p L ig h t
B–Y
M OVERALL ELECTRICAL WIRING DIAGRAM
210
9 xB
10 xB
P o w e r S o u rc e
P o w e r W in d o w
1
2
B
L
B
B
ACC
L
1 AM1
IG1 2
7
1 IC1
L
2
4 1O
1 1L
40A AM1
10A GAUGE
2
B
B–Y
W–L
B–G
1
30A POWER
5
E
3
DD
9
PU
18
PD
RLU
15
12
RLD
RRU
10
13
RRD
16
G–B
R–B
G–Y
R–Y
G–W
R–L
G–W
3
DU
4
W–B
W–B
2
E
1
PWR Relay
R–L
SCION xB (EM0091U)
1
I10
Ignition SW
8 1O
1
D11
Power Window Master SW
6
B
1 1C
4
3
L
J10
Junction
Connector
C
J10
Junction
Connector
2 1O 2 1L
2 1S
C
4 IC1
2 IC1
2 ID1
1 ID1
4 ID1
3 ID1
C
L
R–Y
G–Y
L
R–B
G–B
B–G
4
G–W
L
L–W
R–L
L
L–W
5 BA1
4 BA1
3 BA1
5 BB1
4 BB1
3 BB1
5
1 IG1
4 IG1
2 IG1
4
Down
D
1
G
2
P8
Power Window Control SW
Rear RH
U
3
R
1
G–B
2
SD
G
2
R–B
1
5
4 B SU
Up
D
R
5
L
U
3
G
R
4
1
W–B
Battery
Down
1
2
SD
P7
Power Window Control SW
Rear LH
D
G–B
U
3
5
4 B SU
Up
Down
Up
W–B
7 IC1
R–B
2
SD
P6
Power Window Control SW
Front RH
5
4 B SU
L
G–W
R–L
P9
Power Window Motor
Front LH
L–W
W–B
120A ALT
F8
Fusible Link Block
M
M
W–B
IE
M
M
Left Kick Panel
P11
P12
Power Window Motor
Rear LH
Power Window Motor
Rear RH
M
211
P10
Power Window Motor
Front RH
P o w e r S o u rc e
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
D o o r L o c k C o n tro l
1
4
3
2
L–Y
ACC
A
D4
Door Lock Control Relay
1 AM1
IG1 2
B–Y
4 1O
I10
Ignition SW
IG
26
L1
TVSS
14
E
LSWD
12
6
UL3
ACTD
21
11
Y–G
W–B
G–B
BR–Y
W–L
L–Y
B A (∗1)
3 1L
UL1
19
18
P
L–W
R–B
10A
GAUGE
B
1
J 4(A), (B)
Junction
Connector
B A (∗1)
C B (∗2)
G–B
BR–Y
B A
J 2(A), J 3(B)
Junction
Connector
E A
R–B
E A
L–W
L–O
C
W–B
C
W–B
C
C
W–B
W–B
W–B
J10
Junction
Connector
7 IC1
8 IG1
W–B
W–B
W–B
Battery
Y–G
F8
Fusible Link Block
W–B
120A ALT
5
2
1
Lock
W–B
W–B
W–B
W–B
W–B
60A
MAIN
6 IC1
M
D9
Door Key Lock and Unlock SW Front LH
Door Lock Motor Front LH
Door Unlock Detection SW Front LH
W–B
W–B
4
3
5 IC1
L–W
Lock
3
3
Unlock
6
Unlock
D12
Door Lock Control
SW Front RH
Lock
Unlock
B–G
B–L
3
10 IC2
Y–B
5
6
Unlock
Detection
5
1
BR–Y
8
D11
Door Lock Control
SW Front LH
IRSG
C
9 IG2
G–B
BR–Y
1
1 1C
1
G–B
1
8 IG2
4
P
1
9 IC2
11 IC2
L–R
8 IC2
BR–Y
25A
D/L
G–B
40A
AM1
15A
DOME
BR–Y
3 IA2
Y–G
5 IC2
2
L–O
B
E B
10 1L
G–B
2
L–W
8 1O
Y–B
B B
1
B A
L–R
L–W
O2
Option Connector (TVIP)
SCION xB (EM0091U)
C B (∗2)
IE
Left Kick Panel
D
M OVERALL ELECTRICAL WIRING DIAGRAM
212
(Cont. next page)
11 xB
11 xB (Cont' d)
L–Y
V
Unlock Warning SW
< 9–3>
L
Y
Headlight Relay
< 4–1>
HORN Relay
< 5–4>
Door Courtesy SW
Front RH, Rear LH, RH
< 7–2>
Back Door Courtesy SW
< 7–2>
R
R–W
W–R
G–O
Buckle SW LH
< 9–2> < 19–4>
FLSH Relay
< 5–1>
Door Courtesy SW
Front LH< 7–2>
W–R
Interior Light
< 7–2>
R
R–Y
L–Y
L–O
L–B
L–O
L–B
V
L–Y
L
L–Y
D3
Door Control
Receiver
BR–Y
L–O
L–B
L–O
L–B
L–Y
1
BR–Y
L–O
L–B
L–O
L–B
Lock
Unlock
W–B
B5
Back Door Lock Motor
15 1P
B6
Back Door Opener SW
W–B
L–O
L–B
L–O
L–B
W–B
W–B
W–B
W–B
IE
Left Kick
Panel
M
213
Back Door
Center
BL
4
1
+B
3
PRG
L–W
L–B
5
2
RDA
3 BC1
7 1L
Combination Meter
< 16–3>
J8
Junction
Connector
J8
Junction
Connector
L–W
L–O
L–R
D14
Door Lock Motor
Rear RH
BR–Y
V–W
L–O
L–B
L–W
L–W
L–R
D13
Door Lock Motor
Rear LH
2 1O
M
M
2
1
2
1
3
2
2 BB1
1 BB1
2 BA1
1 BA1
D10
Door Key Lock and Unlock SW Front RH
Door Lock Motor Front RH
4
10
GND
M
13 IB2
5 IB2
4 IB2
1 IB2
1 BC2
6
5
2
1
C
SCION xB (EM0091U)
B
6 IG1
5 IG1
10 IG2
11 IG2
A
M
W–B
D
L–O
C
L–O
C
PRG
8
RDA
KSW
BACT
17
4 1A
B
B
C
C
A
L–W
L–O
24
25
HRLY
13
7
23
PCTY
HORN
DCTY
HAZ
BKL
5
15
16
BDSU
9
LP
SPD
2
UL2
8
7
6
5
4
ACT+
3
L2
ACT–
20
22
A
B
L–Y
A
W ire le s s D o o r L o c k C o n tro l
D o o r L o c k C o n tro l
D4
Door Lock Control Relay
L–B
P o w e r S o u rc e
F o g L ig h t
1
W–L
1 AM1
R e m o te C o n tro l M irro r
ACC 3
L–R
IG1 2
B–Y
(∗1)
4
3
2
L–R
3 1O
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
W–L
I10
Ignition SW
8 1O
15A
ACC
4 1O
2
R5
Remote Control Mirror SW
(∗1)
(∗2)
(∗2)
8
B
Left/
Up
Down
Up
Right
Left
G–R
Right/
Down
10 1J
Operation
SW
1 1C
B–G
LH
2
2
5
3
W–B
M
R17
Remote Control
Mirror RH
M
1 IG2
G–W
1
G–W
LG–B
M
2 IG2
LG–R
M
3
LG–B
LG–R
5
3 IG2
G–R
EA
G–R
Front Right
Fender Apron
1
1 IC2
BR–Y
EB
3 IC2
BR–W
Front Left
Fender Apron
12 1L
Combination
SW< 4–2>
W–B
W–B
W–B
2 IC2
R16
Remote Control
Mirror LH
1
F11
Front Fog Light SW
3
B–W
1
W–B
BR–Y
BR–W
11 1L
G–O
R–W
ON
Battery
7
G–Y
G–O
R–W
R–W
OFF
F3
Front Fog
Light LH
E
6
G–R
2
2
M+
3
5 1L
BFG LFG
F4
Front Fog
Light RH
VR
4
LG–B
1
12 IA1
2
RH
VL
LG–R
3
F8
Fusible Link Block
LH
HR
5
F10
Front Fog Light
Relay
4
RH
HL
Select
SW
G–R
5
120A ALT
SCION xB (EM0091U)
1
GR
40A AM1
6 1L
10A
GAUGE
15A
FOG
Left Kick
Panel
IE
M OVERALL ELECTRICAL WIRING DIAGRAM
214
12 xB
Memo
SCION xB (EM0091U)
215
P o w e r S o u rc e
ABS, TR AC and VSC
1
4
3
2
L–Y
B
W–R(∗1)
B–L
W–R(∗2)
B–L
R–B
ACC
W–L
1 AM1
IG1 2
B–Y
1
1
2
2
7 IE1
5
RL–
RR+
2 IE1
LG–R
LG–B
MR
MRF
14
19
+BS
31
RR–
NEO
10
V
B
B
2
B
2
RL+
L
2
B–L
2
1 1C
20
FR–
15
R
5
R+
45
B–L
2
B–L
3
46
B–L
1
6
Y
IG1
ABS MTR
Relay
1
17
5 IE1
11 1H
1
ABS CUT
Relay
15A AM2
15A DOME
40A AM1
40A ABS NO. 1
3
FR+
2
3 1B
1
3
FL–
3 IE1
S3
Skid Control ECU with Actuator
2
5
4
BR
2
FL+
BR–Y
2
18
BM
G
2
2
R
R
10A GAUGE
7. 5A ECU–IG
B–R
B
1
2
2
1
1
W–R
1
1
2
7 1A
L–Y
B
W–L
8 1O
LG–B
13 1G
R
4 1A
6 1R
4 1O
Ignition SW
B–R
W–R(∗2)
W–R(∗1)
1 1O
B
Y
I10
12 1G
2
A16
ABS Speed Sensor
Rear RH
LG–R
R–B
B–Y
2
1
A15
ABS Speed Sensor
Rear LH
IG2 6
A5
ABS Speed Sensor
Front RH
A4
ABS Speed Sensor
Front LH
B
5 AM2
ST2
7. 5A ECU–B
SCION xB (EM0091U)
L–Y
W–R
1
6 IA2
2
1
1
R
L
V
B–W
B
B–W
B–L
B
B–G
3
4
Engine Control Module
< 2–9>
5
B
Battery
60A ABS
60A MAIN
120A ALT
F8
Fusible Link Block
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
A
B
C
D
E
F
G
M OVERALL ELECTRICAL WIRING DIAGRAM
216
(Cont. next page)
13 xB
13 xB (Cont' d)
(Cont. next page)
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
ABS, TR AC and VSC
A
B
C
D
E
F
G
5
L–Y
7
6
8
L–Y
B
B
W–R(∗1)
W–R(∗1)
B–L
B–L
W–R(∗2)
W–R(∗2)
B–L
B–L
R–B
R–B
Buzzer
G–W
W
R–W
B
R
24
13
TS
42
D/G
28
40
P
WFSE
F
G
1
R
R–L
9 1B
E
V2
VSC Buzzer
R
P3
Parking Brake SW
B
R
R–L
27
STP
PKB
S3
Skid Control ECU with Actuator
CSW
GND1
43
32
GND2
1
SP1
WA
29
WT
35
CANL
25
22 IA2
R–W
R–W
1 IA2
BZ
30
W
10 IA2
CANH
11
B
11 IA2
B–R
21 IA2
IND
34
BR–W
5 IA1
VSCW
36
R–Y
P
B–W
W–R
13 IA1
16 IA2
BRL
44
12
W–B
W–B
W–L
SCION xB (EM0091U)
9 IA1
20 IA2
D
2
1
10 1P
9 IA2
B
C
B–L
Stop Light SW
< 9–3>
A/T Indicator
Light SW< 3–3>
Data Link Connector 3
< 2–5> < 2–6>
A
12 IA2
B
B–R
BR–W
R–Y
P
W–R
W–L
W
W
B
5
T3
TRAC OFF SW
2
B–R
BR–W
R–Y
W–B
P
B–W
W–R
W–B
I
J
K
L
M
N
O
P
W–B
W–B
IG
W–B
H
EB
Front Left
Fender Apron
M
217
Right Kick
Panel
M u ltip le x C o m m u n ic a tio n S y s te m (C A N )
ABS, TR AC and VSC
A
B
C
D
E
F
G
9
L–Y
M OVERALL ELECTRICAL WIRING DIAGRAM
218
13 xB (Cont' d)
12
11
10
B
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
W–R(∗1)
B–L
W–R(∗2)
W–R(∗2)
B–L
F B
R–B
J 4(B)
Junction
Connector
F B
6 1O
W–R
(∗1)
W–R
(∗2)
B–L
8 1G
ESS
CANL
9
CANH
7 IB1
14 IB1
4 IE1
10
CANL
3
A
B
A
B
A
B
A
B
A
B
A
J5
Junction
Connector
B
2
5
IG
GND
1
B
CANH
W–B
W
CANL
B
W
14
CANH
6
3 1G
8
R–Y
P
33
CANL
W
P
B
O
W–R
N
B
B–R
BR–W
34
28
BR
M
21
B–W
L
38
P
J
K
37
R–Y
I
W
BR–W
B–R
H
19
4
B
W
5
Y1
Yaw Rate Sensor
W
CPU
B–L
B
TRAC OFF
VSC
Slip
CANH
B
W
B
W
W–B
ABS
Brake
Speedometer
2
B–L
1
W
23
BAT
B
40
3
IG
S7
Steering Sensor
C6
Combination Meter
L–Y
R–B
B–R
SCION xB (EM0091U)
1
CANH
1 1A
9
CANL
E4
Engine Control
Module
D1
Data Link Connector 3
W–B
B–W
W–B
A17
A/C Amplifier
W–R
W–B
6 BA1
BH
Rear Quarter
Panel Inner RH
BK
W–B
Rear
Door LH
W–B
IF
W–B
BR
Instrument Panel
Brace LH
6 BB1
Rear
Door RH
BI
14 xB
S R S (B e fo re D e c . 2 0 0 5 P ro d u c tio n )
P o w e r S o u rc e
1
4
3
2
L–Y
Seat Belt Warning
System< 9–2>
R–B
ACC
1
23
IG1 2
1 AM1
W–L
B–Y
F1
10A GAUGE
ST2
Data Link
Connector 3
< 2–5> < 2–6>
2
13 1G
6 1O
1 1O
BR
W–R
B
12 1G
1
R–B
G–W
B–Y
B–O
15A AM2
15A DOME
5 B
IG2
3 B
19 B
LA
TC
12 B
SIL
22 B
15 B
3 A
26 B
–SL
+SL
GSW2
8 A
LSP+
LSP–
11 A
7 A
LBE+
LBE–
+SR
9 B
–SR
20 B
A 9(A), A10(B), A11(C)
Airbag Sensor Assembly
RBE+
1
8 C
RBE–
12 C
E2
E1
28 B
27 B
D+
D–
14 B
13 B
P2+
8 B
P2–
7 B
P+
P–
10 B
11 B
PL+
2 A
PL–
1 A
PR+
5 C
PR–
6 C
2
D2+
D2–
D+
D–
W–B
Battery
3
4
P2+
P2–
1
P+
2
1
2
1
2
2
1
P–
A12
P13
P14
Airbag Squib
(Front Passenger' s Airbag Assembly)
Pretensioner LH
Pretensioner RH
F2
Front Airbag
Sensor RH
M
219
W–B
IE
1 IA3
BR–W
1
B–W
3
BR–W
2 IA3
4
A13
Airbag Squib
(Steering Wheel Pad)
Left Kick
Panel
B–W
Y
Y–B
Y
Y–B
Y–G
Y–R
Y–P
Y–GR
Y
Y–B
Y–O
B8
Buckle SW RH
Occupant Detection
Sensor
BR
2
1
Instrument
Panel
Brace LH
Y–V
3 1D
3
IF
D2–
17 B
2 1O
O
60A MAIN
120A ALT
F8
Fusible Link Block
2 1D
D2+
16 B
W–B
W–B
W–B
B
Combination
Meter< 9–2>
B–L
3
4
LG–B
L–Y
8 1D
1
2
BR
W–R
B
W
1
5
4
2
2
1
3 IA3
9 1D
P–B
1
Seat Position
Sensor
7 1G
W–R
L–Y
1 1C
4 IA3
B–Y
8 1G
BR
5 1D
7 1A
34
21
B–R
4 1A
R–B
40A AM1
10 1H
40
1
B–G
SCION xB (EM0091U)
2
3
1
CPU
B7
Buckle SW LH
Seat Position Sensor
B
W–R
L–Y
I10
Ignition SW
8 1O
Engine Control
Module< 2–9>
IG2 6
SRS
C6
Combination Meter
4 1O
5 AM2
Front Airbag
Sensor LH
P o w e r S o u rc e
R e a r W ip e r a n d W a s h e r
1
A u d io S y s te m
4
3
2
L–Y
ACC 3
1 AM1
W–L
L–R
IG1 2
L–R
B–Y
3 1O
4 1O
I10
Ignition SW
1
9 IB2
10 IB2
12 IB2
11 IB2
ON
W
R
Y
B
B–R
L–Y
L–Y
1 IA1
5
2
W–B
W–L
L
B
2
W
B
1
OFF
GR
W–L
W1
Washer Motor
15A DOME
1
1
ACC
8 A
4 A
2 B
RL+
R 2(A), R 3(B), R18(C)
Radio and Player
O 4(D)
Option Connector
(Radio and Player)
ANT
+B
M
2 IB2
GND
3
7 A
FL+
FL–
2 A
6 B
1 B
RL–
3 B
RR+
RR–
FR+
6 A
FR–
1 A
5 A
11 1N
C A
F A
2 1O
B–L
B–G
J 2(A), J 3(B)
Junction
Connector
L
LG
V
P
W–B
W–L
1
1 1C
9 1N
3 A
2
2
2
R
EW
Washer2
6 BC1
1
Y
WR
Washer1
1
8 1O
Rear Speaker RH
2
A14
Antenna Amplifier
3
B
B
B
Rear Wiper and
Washer SW
2 1A
4 1A
40A AM1
SCION xB (EM0091U)
1 1T
R12
Rear Speaker LH
L
L
20A WIPER
L–Y
C9
Combination SW
+1R
3 1N
R11
15A
ACC
A A
D A
5 BC1
4
A B
A B
3
D B
C B
C B
F B
L
1
2
L
LG
2
V
1
F B
LG
V
P
1
D B
P
W–L
B
2
W–B
120A ALT
60A MAIN
F8
Fusible Link Block
T4
T5
Tweeter LH
Tweeter RH
14 IC2
M
7 IC2
14 IG2
7 IG2
W–B
Battery
Left Kick
Panel
IE
IF
2
F12
Front Door Speaker LH
Instrument Panel
Brace LH
L
LG
V
P
1
R15
Rear Wiper Motor
J 2(A), J 3(B)
Junction
Connector
1
2
F13
Front Door Speaker RH
M OVERALL ELECTRICAL WIRING DIAGRAM
220
(Cont. next page)
15 xB
15 xB (Cont' d)
A u d io S y s te m
5
7
6
8
O3
Option Connector (IPOD Unit)
FWGD
1
ACID
DORX
9
4
11 D
AUDL
12 D
AUDR
13 D
14 D
AGND
SW2
16 D
DGND
SWG
6 C
8 C
SGND
SW1
7 C
P
R
AUXO
3
ACDT
LG
(Shielded)
ASGN
Combination
Meter< 16–3>
W
2
ARO
10 D
O
V–W
B
1
ALO
SGND
16
O
DOGD
GGND
14
LG
7 D
DORX
AGND
13
(Shielded)
9 D
DOTX
AUDR
12
G
8 D
ACPW
AUDL
11
R
6 D
C
FWPW
ACDT
10
Y
ALI
(Shielded)
4 D
R2(A), R3(B), R18(C)
Radio and Player
O 4(D)
Option Connector (Radio and Player)
ASGN
AUXI
SPD
ARI
16 C
19 C
3 C
15 C
17 C
DOGD
7
W
B
ACID
DOTX
8
6
V
3 D
C
FWGD
ACPW
P
G
W–B
SCION xB (EM0091U)
1 D
FWPW
4
3
11
10
12
AU2
EAU
AU1
MODE
Seek+
Seek–
S9
Stereo Jack Adapter
Volume+
Volume–
C7
Combination SW
M
221
P o w e r S o u rc e
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
C o m b in a tio n M e te r
1
4
3
2
L–Y
B–Y
ACC
W–L
B–Y
5 AM2
IG2 6
B
4 1O
L–Y
W–R
ST2
B
IG1 2
10A
GAUGE
Engine Control
Module< 2–5>
1 AM1
6 1O
13 1G
8 1G
I10
ABS
Clock M
Clock H
1
35
32
27
34
D A (∗1)
D B
D B (∗2)
24
15
Interior Light
System< 7–1> < 7–2>
14
38
36
37
D B (∗2)
B
VSC System
< 13–9>
14 IA2
V–W
6
1F
1
3
1H
V–W
Engine Control Module
< 2–8>
4
1K
V–W
Door Lock Control
Relay< 11–6>
B2
Brake Fluid Level
Warning SW
2
W–B
IF
D A
Radio and Player
< 15–5>
BR
Instrument Panel
Brace LH
D A (∗1)
V–W
BR
BR
Battery
7 IB2
SRS System
< 14–2> < 19–2>
F14
Fuel Sender
3
Taillight and Illumination
System< 6–5>
2
Seat Belt Warning System
< 9–2> < 19–3>
V
F8
Fusible Link Block
Key Reminder System
< 9–3>
60A MAIN
120A ALT
4 1T
J 4(A), (B)
Junction
Connector
28
B
7 1F
29
VSC System
< 13–10>
33
V
BR
3
25
Headlight
System< 4–4>
31
VSC System
< 13–10>
21
V–W
B–L
B–G
4
Brake
1
1 1C
Beam
Door
CPU
15A
AM2
ODO/Trip SW
1
40
SRS
Belt
2
15A
DOME
1
LCD
(ODO/Trip
Clock)
Fuel
40A
AM1
Buzzer
1
23
Maint
Reqd
2
30
Fuel
2
1
Tachometer
1
Speedometer
W–R
L–Y
W–L
SCION xB (EM0091U)
8 1O
C6
Combination Meter
B–R
7 1A
L–Y
4 1A
R–B
1 1O
B
12 1G
Ignition SW
EA
Front Right
Fender Apron
M OVERALL ELECTRICAL WIRING DIAGRAM
222
(Cont. next page)
16 xB
16 xB (Cont' d)
C o m b in a tio n M e te r
Electronically Controlled
Transmission and
A/T Indicator System
< 3–5> < 3–6>
Taillight and Illumination
System< 6–5>
Turn Signal and
Hazard Warning Light
System< 5–3>
L
2
D
N
R
P
Turn RH
Turn LH
Illumination
Water Temp. Cool
Water Temp. Hot
TRAC OFF
Slip
VSC
O/D OFF
Malfunction
Indicator Lamp
Engine Control
System< 2–4>
VSC System
< 13–9>
O1
Oil Pressure SW
Electronically Controlled
Transmission and A/T Indicator
System< 3–6>
Engine Control System
< 2–3>
G
1
Charging System
< 1–4>
G
2 IF1
Charge
LCD Back Light
SCION xB (EM0091U)
Oil Pressure
2
3
19
5
4
20
12
16
17
11
10
9
8
7
6
26
18
13
C6
Combination Meter
8
7
6
5
M
223
P o w e r S o u rc e
R a d ia to r F a n a n d C o n d e n s e r F a n
1
R e a r W in d o w D e fo g g e r
4
3
2
B–R
ACC
1 AM1
IG1 2
B–Y
4 1O
7. 5A
ECU–IG
B–R
I10
Ignition SW
10A
GAUGE
I12
3 1B
L–R
B–R
Off
B
2
3
1
1
2
5
1
3
FAN NO. 2
Relay
3
4
R–B
2
2
2
4
5
1
1
1
1
1
3
2
5
B
B
W–L
B
B
6 IB2
W–B
W–B
1 BC1
B
1
W–B
W–B
W–B
EB
1 B
B
W–B
Front Left
Fender Apron
1 A
Left Kick
Panel
IE
Back Door
LH
BM
R13(A), R14(B)
Rear Window Defogger
2 1O
N4
Noise Filter
(Stop Light and
Rear Window Defogger No. 2)
B
1
Fuse Block< 2–9>
A1
A/C Condenser Fan
Resistor
3 1K
1 BD1
B
B
W–L
2
F8
Fusible Link Block
Engine Control
Module< 2–9>
Battery
1
L
7
IA1
Y–R
R1
Radiator Fan Motor
B
B–G
M
1
120A ALT
1
W–B
L
L–R
15 IA2
2
4
1
Y–R
1 1C
1
R4
Rear Window
Defogger Relay
1
1
1
FAN NO. 1
Relay
30A
RDI
40A
AM1
30A
DEF
1
1
1
Timer
Circuit
N2
Noise Filter
(Rear Window Defogger No. 1)
8 1O
2
B–R
B–L
8 1J
On
B–L
L–W
W–L
B–R
SCION xB (EM0091U)
Integration Control and Panel
Rear Window
Defogger SW
11 1P
M OVERALL ELECTRICAL WIRING DIAGRAM
224
17 xB
Memo
SCION xB (EM0091U)
225
P o w e r S o u rc e
∗ 1 : Before Dec. 2005 Production
∗ 2 : From Dec. 2005 Production
A ir C o n d itio n in g
1
4
3
2
R
B–L
ACC
B–Y
1 AM1
IG1 2
B–Y
On
8 1O
3
B–Y
4 1O
18 1H
A A (∗1)
A B
A B (∗2)
R
1
W–B
7. 5A
ECU–IG
10A
GAUGE
A A
A A (∗1)
J 4(A), (B)
Junction
Connector
9 1J
11 1H
B–Y
I10
Ignition SW
B–Y
I11
Integration Control and Panel
B–Y
B–L
W–L
A/C SW
Off
2
2
2
HTR
Relay
3
1
1
3
L
2
DEF
1
2 1O
1 1C
7 1J
4
1 1J
A6
A/C Thermistor
B
1
D2
Defroster Mode
Detection SW
40A HTR
40A AM1
7. 5A
A. C
1
4
B–Y
5
2
50A
HTR SUB1
2
1
L
L–R
12 IF1
13 A
SOL+
2
L–B
IE
SG–2
CANL
9 A
CANH
8 A
W–B
Right Kick
Panel
IG
IE
Left Kick
Panel
EA
1
P2
Pressure Sensor
Front Right
Fender Apron
2
Multiplex Communication
System (CAN)< 13–11>
1
3
13 IA2
B–R
L
W–B
2
W–B
Left Kick
Panel
23 A
TE
B–R
3 EA1
OFF
Battery
I13
Integration Control
and Panel
PRE
12 A
BR
LO
8 IA1
R–W
M1
3 IA1
Generator
< 1–4>
M2
A17(A), A18(B)
A/C Amplifier
S5–2
SG–1
7 A
10 A
BR
W–B
Blower SW
HI
22 A
SW–4
4 IH1
B–W
7
26 A
SW–5
G–B
5 IH1
L–W
6
L–Y
L–B
W–B
F8
Fusible Link Block
120A ALT
6 IH1
27 A
R–W
A2
A/C Magnetic
Valve
ALT
24 B
1
10
BR
W–B
4
L–W
2
L–Y
3
L–B
1
4
3 IH1
B–Y
L–B
W–B
B3
Blower Motor
L–B
M
2
O
L–B
B4
Blower Resistor
L–R
B–G
1
B–W
1 IH1
B
SCION xB (EM0091U)
A B (∗2)
1
A
B
C
M OVERALL ELECTRICAL WIRING DIAGRAM
226
(Cont. next page)
18 xB
18 xB (Cont' d)
T w o W a y F lo w H e a te r
P T C H e a te r
5
A
B
C
8
7
6
R
B–L
B–Y
R
B–L
I15
Integration Control and Panel
2
B–L
B–L
B–L
A8
Air Inlet Servo Motor
7
1
1
B–L
B–L
Foot Mode SW
F/D SW
5
HTR SUB1
Relay
A
L–B
W
M
W–B
Foot SW
L–B
Max Hot SW
2
Control
Circuit
B
3
1
1
L–W
W
B–W
W
L–B
1
3
3
1
1
17 IA2
J7
Junction
Connector
P5
PTC Heater
W
A
2
W–B
8
L–B
A
IG
16 A
L–W
18 A
14 A
L–O
SW–9
L–R
SW–6
L–Y
17 B
14 B
B–L
W
L–B
SCION xB (EM0091U)
Max Cool SW
1
9 B
28 A
OUT–6 OUT–4 OUT–7
SW–2
A17(A), A18(B)
A/C Amplifier
PTC1
GND–1
24 A
20 A
W–B
L–W
2
E
W–B
D2
Inlet Air Position
Detection SW
D
FRS
REC
1
W–B
W–B
IG
Front
Right Fender
Apron
EA
M
227
Right Kick
Panel
S e a t B e lt W a rn in g
(F ro m D e c . 2 0 0 5 P ro d u c tio n )
S R S (F ro m D e c . 2 0 0 5 P ro d u c tio n )
P o w e r S o u rc e
1
4
3
2
W–R
B
B–Y
R–B
O
L–Y
F B
J 4(B)
Junction
Connector
F B
13 IB1
5 AM2
23
W–R
32
C B
F B
PBEW
15 B
16 B
TC
PAON
3
B
13 B
LA
W
14 B
IG2
P–B
O
B–Y
21 B
1
6
Door Lock Control Relay
< 11–7>
9 1D
P–AB
GR
8 1D
IND
1
R
10 1H
G–W
7 1G
B–O
1
B
15A AM2
R–B
B
Passenger' s Seat Belt/
Airbag Indicator (ON/OFF)
B–Y
BR
B–R
13 1G
P15
Passenger Seat Belt
Warning Lamp
2
34
21
W–R
40
1
Data Link
Connector 3
< 2–5> < 2–6>
Buzzer
2
15A DOME
B–G
1
10A GAUGE
1
2
1 1C
8 1G
B–R
L–Y
W–R
40A AM1
1
5 1D
7 1A
R–B
Engine Control
Module< 2–9>
CPU
4 1A
D A
22 B
SIL
17 B
23 B
P–AB
GSW2
PAON
A19(A), A20(B), A21(C)
B–L
Airbag Sensor Assembly
3
4
E2
E1
26 B
25 B
D2–
7 B
D+
D–
5 B
6 B
P2+
1 B
P2–
2 B
P+
P–
4 B
3 B
PD+
2 A
PD–
1 A
PP+
4 C
PP–
5 C
+SL
30 B
4
P2+
P2–
A13
Airbag Squib
(Steering Wheel Pad)
1
P+
2
1
2
1
2
2
1
2
P–
A12
P13
P14
Airbag Squib
(Front Passenger' s Airbag Assembly)
Pretensioner LH
Pretensioner RH
F16
Front Airbag
Sensor LH
F17
Front Airbag
Sensor RH
B
3
D–
B
2
D+
1 IA3
W
1
D2–
–SR
27 B
W
Left Kick
Panel
3
D2+
2 IA3
B
IE
3 IA3
W
W–B
BR
Battery
IF
B
4 IA3
4
+SR
29 B
Y
Y–B
Y
Y–B
Y–G
Y–R
Y–P
Y–GR
Y
Y–B
Y–O
Y–V
3 1D
2 1O
Instrument Panel
Brace LH
–SL
28 B
W
W–B
W–B
F8
Fusible Link Block
60A MAIN
120A ALT
2 1D
D2+
8 B
1
J 6(A), J 7(B)
Junction
Connector
3 1L
Belt
4 1O
SRS
6 1O
1 1O
D A
J 4(B)
Junction
Connector
2
7. 5A ECU–B
SCION xB (EM0091U)
12 1G
33
C B
C6
Combination Meter
R–B
B
B
W–R
L–Y
W–R
I10
Ignition SW
8 1O
W–R
35
1
IG2 6
ST2
6 1R
B
G–W
R–B
IG1 2
1 AM1
W–L
B
W–R
ACC
A
C
M OVERALL ELECTRICAL WIRING DIAGRAM
228
(Cont. next page)
19 xB
19 xB (Cont' d)
S e a t B e lt W a rn in g
(F ro m D e c . 2 0 0 5 P ro d u c tio n )
A
B
8
7
6
O 5(A), O 6(B)
Occupant Classification ECU
B
IG
+B
7 A
1 A
FSR+
8 A
FSR–
4 A
2 A
SGD3
3 B
SVC2
12 B
SIG2
8 B
SGD2
2 B
SVC4
6 B
SIG4
10 B
SGD4
4 B
Y
W
W
L
O
V
R
BR
E
4
SIG3
9 B
GR
2
SVC3
5 B
G
LBE–
3
SGD1
1 B
SB
LBE+
6
7 B
R
LSP–
1
11 B
SIG1
P
LSP+
5 A
SVC1
O
SA2
9 A
BGND
1
2
RBE+
RBE–
SVC1
SIG1
SGD1
SVC3
SIG3
SGD3
SVC2
SIG2
SGD2
SVC4
SIG4
SGD4
5 IB1
W–B
Data Link Connector 3
< 2–5>
B9
Buckle SW LH
Seat Position Sensor
B10
Buckle SW RH
O7
Occupant Classification
Sensor Front LH
O9
Occupant Classification
Sensor Rear LH
O8
Occupant Classification
Sensor Front RH
O10
Occupant Classification
Sensor Rear RH
11 1K
2 1O
R–B
DSP+
G–W
14 A
LG–B
L–Y
SCION xB (EM0091U)
5
3 A
BSW
W
Y
GR
W–R
W–R
11 IB1
GND
W–B
W
6 IB1
12 IB1
DIA
W–R
W–R
B
C
5
W–R
11 A
12 A
DBE+
DBE–
A19(A), A20(B), A21(C)
Airbag Sensor Assembly
13 A
DSP–
12 C
FSP+
13 C
FSP–
BK
W–B
W–B
IE
Left Kick
Panel
M
229
Rear Quarter Panel
Inner RH
[A]
Power Source
Starting
1
Engine Control
2
4
3
R
[L]
B-R
B-R
15A
EFI
[H]
12 EA1
R-Y
R-Y
1
[E]
1
3
Knock Sensor
1
B
B
BR
BR
3
B
B
1
GR
GR
4
B-W
4
EFI MAIN
Relay
B-R
B-W
1
H11
Heated
Oxygen
Sensor
2
Y-R
[G]
1
15 3C
R-G
W-B
B-W
(2L-T)
(2L-T)
4
6
1
R-W
5
BO2
Y-R
3
BR-W
BR-W
6
G
G
5
G-R
G-R
4
Y-R
7
L-Y
BR 2
1
FP
+B
T1
D1
Data Link
Connector 1
E1
8
Y-R
6
G-Y
G-Y
9
GR-B
GR-B
W-R
W-R
BR
Fender Apron LH
EA
BR
W-B
W-B
Fender Apron LH
N
O
21 EA3
B
BR
W-R
VF
4
3
[K]
EA
L
M
Y-R
R-G
BR
W-B
W-R
W-R
Fuel Pump
1
F37
M
OX1
17
EA3
R-G
2
1
W-R
W-R
W-R
W-R
I12
1
4 EA3
R-G
2
Injector No.4
1
I10
Injector No.2
I11
1
2
L-Y
W-R
Battery
K
16 BS1
B-R
2
Injector No.3
I9
S38 (A), S39 (B)
Starter
B-R
B-R
B-R
Injector No.1
B-W
2
1 A
Y-R
Y-R
R-G
B-R
30A AM2
40A AM1
100A ALT
(2L-T)
1
B
J
Air Flow Meter
W-B
[D]
B-W
B
Y-R
A5
6 EA4
2
[J]
Y-R
2 B
Circuit Opening
Relay
R-G
2 A
C19
Y-R
S40 (A), S41 (B)
Starter Relay
(Shielded)
[C]
2
1 B
F
G
I
3
[F]
7 3C
Emission ECU <9-8>
2
2
Y-R
B-W
W-R
W
[B]
E
H
B-W
(22R-E)
1 A
2
Y-R
Y-R
W-B
B-W
(22R-E)
B-L
(2L-T)
B-W(22R-E)
D
2
1
1
(2L-T)
R
SCION xB (EM0091U)
7 EA3
(22R-E)
(2L-T)
[I]
C
K2
B-L
R-Y
B-L
W
B
W-R
B-R
B-R
2
A
7. 5A
IGN
B-W
ST2
7. 5A
ST
B-W
5 8
AM2
A B
7
IG2
B
B-W
(22R-E)
W-R
W
W-R
1 4
B A
B-W
ST1
B-W
W
1 4
AM1
A B
B-L
ACC I 6 (A),(B)
Ignition SW
IG1
A
ID
Left Kick Panel
BR
EC
Intake
Manifold RH
P
Q
R
S
M OVERALL ELECTRICAL WIRING DIAGRAM
194
* The system shown here is an EXAMPLE ONLY. It is different to the
actual circuit shown in the wiring diagram section.
HOW TO READ THIS SECTION
[A] : System Title
[B] : Indicates the wiring color.
Wire colors are indicated by an alphabetical code.
B
= Black
W = White
BR = Brown
L
= Blue
V
SB = Sky Blue
= Violet
R = Red
G = Green
LG = Light Green
P
Y
GR = Gray
= Pink
= Yellow
[F] : Junction Block (The number in the circle is the J/B No.
and the connector code is shown beside it).
Junction Blocks are shaded to clearly separate them
from other parts.
Example:
3C indicates that
it is inside
Junction Block
No.3
O = Orange
The first letter indicates the basic wire color and the
second letter indicates the color of the stripe.
Example:
L–Y
[G] : Indicates related system.
SCION xB (EM0091U)
L
(Blue)
[H] : Indicates the wiring harness and wiring harness
connector. The wiring harness with male
terminal is shown with arrows ( ).
Outside numerals are pin numbers.
Y
(Yellow)
[C] : The position of the parts is the same as shown in
the wiring diagram and wire routing.
[D] : Indicates the pin number of the connector.
The numbering system is different for female
and male connectors.
Example : Numbered in order
from upper left to
lower right
Numbered in order
from upper right to
lower left
Female
[I]
Male (
)
: ( ) is used to indicate different wiring and
connector, etc. when the vehicle model, engine type,
or specification is different.
[J] : Indicates a shielded cable.
Female
Male
The numbering system for the overall wiring diagram is
the same as above
[E] : Indicates a Relay Block. No shading is used and
only the Relay Block No. is shown to distinguish
it from the J/B.
Example :
[K] : Indicates and located on ground point.
[L] : The same code occuring on the next page indicates
that the wire harness is continuous.
Indicates Relay Block No.1
M
195
SYSTEMS
LOCATION
SYSTEMS
LOCATION
SCION xB (EM0091U)
ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13–3
Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1~19–1
Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18–2
Power Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10–2
Audio System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15–3
PTC Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18–7
Back–Up Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–2
Radiator Fan and Condenser Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17–2
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4
Rear Window Defogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17–3
Cigarette Lighter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–4
Rear Wiper and Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15–2
Combination Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16–2
Remote Control Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12–3
Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11–2
Seat Belt Warning (Before Dec. 2005 Production) . . . . . . . . . . . . . . . 9–2
Electronically Controlled Transmission and A/T Indicator . . . . . . . . . 3–2
Seat Belt Warning (From Dec. 2005 Production) . . . . . . . . . . . . . . . . 19–4
Engine Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
Shift Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–3
Fog Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12–2
SRS (Before Dec. 2005 Production) . . . . . . . . . . . . . . . . . . . . . . . . . . 14–2
Front Wiper and Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–3
SRS (From Dec. 2005 Production) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19–2
Headlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4
Stop Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–4
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
Taillight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
Illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
TRAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13–3
Interior Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–2
Turn Signal and Hazard Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
Key Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–3
Two Way Flow Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18–5
Light Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–1
VSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13–3
Multiplex Communication System (CAN) . . . . . . . . . . . . . . . . . . . . . 13–11
Wireless Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11–7
M OVERALL ELECTRICAL WIRING DIAGRAM
196
SYSTEM INDEX