05-541
DIAGNOSTICS
-
SFI SYSTEM (3MZ-FE)
05EXE-05
DTC
P0351
IGNITION COIL ”A” PRIMARY/SECONDARY
CIRCUIT
DTC
P0352
IGNITION COIL ”B” PRIMARY/SECONDARY
CIRCUIT
DTC
P0353
IGNITION COIL ”C” PRIMARY/SECONDARY
CIRCUIT
DTC
P0354
IGNITION COIL ”D” PRIMARY/SECONDARY
CIRCUIT
DTC
P0355
IGNITION COIL ”E” PRIMARY/SECONDARY
CIRCUIT
DTC
P0356
IGNITION COIL ”F” PRIMARY/SECONDARY
CIRCUIT
HINT:
These DTCs indicate a malfunction related to primary circuit.
If DTC P0351 is displayed, check No. 1 ignition coil with igniter
If DTC P0352 is displayed, check No. 2 ignition coil with igniter
If DTC P0353 is displayed, check No. 3 ignition coil with igniter
If DTC P0354 is displayed, check No. 4 ignition coil with igniter
If DTC P0355 is displayed, check No. 5 ignition coil with igniter
If DTC P0356 is displayed, check No. 6 ignition coil with igniter
circuit.
circuit.
circuit.
circuit.
circuit.
circuit.
CIRCUIT DESCRIPTION
A Direct Ignition System (DIS) is used on this vehicle.
The DIS is a 1-cylinder ignition system which ignites one cylinder with one ignition coil. In the 1-cylinder
ignition system, the one spark plug is connected to the end of the secondary winding. High voltage generated
in the secondary winding is applied directly to the spark plug. The spark of the spark plug passes from the
center electrode to the ground electrode.
The ECM determines the ignition timing and outputs the ignition signals (IGTs) for each cylinder. Using the
IGT, the ECM turns on and off the power transistor inside the igniter, which switches on and off current to
the primary coil. When current to the primary coil is cut off, high-voltage is generated in the secondary coil
and this voltage is applied to the spark plugs to create sparks inside the cylinders. As the ECM cuts the current to the primary coil, the igniter sends back the ignition confirmation signal (IGF) for each cylinder ignition
to the ECM.
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
Author:
Date:
731
05-542
DIAGNOSTICS
-
SFI SYSTEM (3MZ-FE)
From Battery
ECM
Igniter
No.1 Ignition Coil with Igniter
IGT1
No. 1 Cylinder
IGF1
Crankshaft
Position
Sensor
Ignition Coil
IGT2
No. 2 Ignition
Coil with Igniter
No. 2 Cylinder
IGT3
No. 3 Ignition
Coil with Igniter
No. 3 Cylinder
IGT4
No. 4 Ignition
Coil with Igniter
No. 4 Cylinder
IGT5
No. 5 Ignition
Coil with Igniter
No. 5 Cylinder
IGT6
No. 6 Ignition
Coil with Igniter
No. 6 Cylinder
VVT
Sensor
Other Sensors
ECT Sensor
MAF Meter
Throttle Position Sensor
Others
Spark Plug
TACH
To Tachometer
A82677
DTC No.
P0351
P0352
P0353
P0354
P0355
P0356
DTC Detection Condition
No IGF signal to ECM while engine is running
(1 trip detection logic)
Trouble Area
Ignition system
Open or short in IGF1 and IGT circuits (1 through 6) from
ignition coil assy to ECM
Ignition coil assy (No. 1 through No. 6)
ECM
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
Author:
Date:
732
05-543
DIAGNOSTICS
-
SFI SYSTEM (3MZ-FE)
MONITOR DESCRIPTION
Ignition Coil with Igniter
IGT
ECM
Ignition Coil
Igniter
IGF
Ignition Signal
(IGT)
Ignition
Confirmation
Signal (IGF)
Normal
Malfunction
Circuit Open
time
A82388
If the ECM does not receive the IGF after sending the IGT, it interprets this as a fault in the igniter and sets
a DTC.
MONITOR STRATEGY
Related DTCs
P0351: Igniter (Cylinder 1) malfunction
P0352: Igniter (Cylinder 2) malfunction
P0353: Igniter (Cylinder 3) malfunction
P0354: Igniter (Cylinder 4) malfunction
P0355: Igniter (Cylinder 5) malfunction
P0356: Igniter (Cylinder 6) malfunction
Required sensors / components (Main)
Igniter
Required sensors / components (Related)
CKP sensor
Frequency of operation
Continuous
Duration
0.256 seconds + 6 sparks
MIL operation
Immediate
Sequence operation
None
TYPICAL ENABLING CONDITIONS
The monitor will run whenever these DTCs are not present
See page 05-377
Either of the following conditions is met:
Condition 1 or 2
1. Engine RPM
1,500 rpm or less
2. Starter
OFF
TYPICAL MALFUNCTION THRESHOLDS
IGF signal
ECM does not detect IGF signal from igniter when ECM sends IGT signal to igniter
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
Author:
Date:
733
05-544
DIAGNOSTICS
-
SFI SYSTEM (3MZ-FE)
COMPONENT OPERATING RANGE
IGF signal
Igniter outputs IGF signal when it receives IGT signal from ECM
WIRING DIAGRAM
ECM
I15
Ignition Switch
I2
Ignition Coil Assy No. 1
7 AM2
R
IG2 6
1
Y
W-B
IC1 1
4
GR
+B
IGT
GND IGF
3
W-R
R
1
W-B
6
1F
4
R
1
W-B
4
R
IGT
GND IGF
R
1 IC3
1
W-B
10
AM2
F7
FL Block
Assy
BR
4
R
IGT2
W-R
2
+B
IGT
GND IGF
+B
IGT
GND IGF
10
E7
Y-B
3
IGT3
W-R
2
W-R
11
E7
L-Y
3
IGT4
W-R
2
Ignition Coil Assy No. 5
R
1
W
W-B
BR
4
R
+B
IGT
GND IGF
FL
Main
W-B
N1
Noise
Filter
R
1
R
+B
IGT
4
W-B
EC
GND IGF
IGT5
W-R
2
W-R
L-R
3
W-B
1
12
E7
3
Ignition Coil Assy No. 6
R
W-R
G-Y
I7
Battery
IGF1
I6
W-B
2 EB1
1
9
E7
3
Ignition Coil Assy No. 4
W-B
IGT1
W-R
P
I5
L-Y
W-R
24
E7
W-R
R
O
4
S29
Ignition Coil Assy No. 3
W-B
1 1G 4 1C
B
+B
I4
IG2
4
S28
Short Connector
Ignition Coil Assy No. 2
1 1C
W-R
2
I3
Instrument
Panel J/B Assy
8
E7
R-L
BR
A
2
13
E7
1 IGT6
E9 E1
J7
J/C
A BR
ED
A88694
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
Author:
Date:
734
05-545
DIAGNOSTICS
-
SFI SYSTEM (3MZ-FE)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand−held tester or the OBD II scan tool. Freeze frame data records the
engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean
or rich, and other data from the time the malfunction occurred.
1
CHECK SPARK PLUG AND SPARK OF MISFIRING CYLINDER (See page 18-9 )
OK: Spark occurs.
NG
Go to step 4
OK
2
CHECK WIRE HARNESS (IGNITION COIL ASSY - ECM (IGF1 TERMINAL)
(a)
Wire Harness Side
(b)
(c)
I2 I3
I4 I5
I6 I7
Ignition Coil
Disconnect the I2, I3, I4, I5, I6 and I7 ignition coil connectors.
Disconnect the E7 ECM connector.
Check the resistance of the wire harness side connectors.
Standard:
Tester Connection
I2-2
I3-2
I4-2
I5-2
I6-2
I7-2
E7
ECM
I2-2
I3-2
I4-2
I5-2
I6-2
I7-2
or
or
or
or
or
or
-
E7-24
E7-24
E7-24
E7-24
E7-24
E7-24
(IGF1)
(IGF1)
(IGF1)
(IGF1)
(IGF1)
(IGF1)
E7-24
E7-24
E7-24
E7-24
E7-24
E7-24
(IGF1)
(IGF1)
(IGF1)
(IGF1)
(IGF1)
(IGF1)
-
Body
Body
Body
Body
Body
Body
Specified Condition
Below 1 Ω
ground
ground
ground
ground
ground
ground
10 kΩ or higher
IGF1
Y
A54393
A81699
A85848
NG
REPAIR OR
CONNECTOR
REPLACE
HARNESS
AND
OK
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
Author:
Date:
735
05-546
DIAGNOSTICS
3
-
SFI SYSTEM (3MZ-FE)
CHECK ECM (IGF VOLTAGE)
(a)
IGF1 (+)
E1 (-)
(b)
(c)
E7
ECM
E9
ECM
Disconnect the I2, I3, I4, I5, I6 and I7 ignition coil connectors.
Turn the ignition switch ON.
Measure the voltage between the terminals of the ECM
connectors.
Standard:
Tester Connection
Specified Condition
E7-24 (IGF1) - E9-1 (E1)
4.5 to 5.5 V
A76903
HINT:
Reference: Inspection using the oscilloscope.
During cranking or idling, check the waveform of the ECM connectors.
IGF 1
Tester Connection
Specified Condition
E7-24 (IGF1) - E9-1 (E1)
Correct waveform is as shown
E1 (-)
E7
ECM
E9
ECM
IGF Signal Waveform
2 V/
Division
CH2
GND
20 msec./Division
A88572
NG
REPLACE ECM (See page 10-24 )
OK
REPLACE IGNITION COIL ASSY
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
Author:
Date:
736
05-547
DIAGNOSTICS
4
SFI SYSTEM (3MZ-FE)
CHECK WIRE HARNESS (IGNITION COIL ASSY - ECM (IGT TERMINAL))
(a)
Wire Harness Side
(b)
(c)
I2 I3
I4 I5
I6 I7
Ignition Coil
Disconnect the I2, I3, I4, I5, I6 and I7 ignition coil connectors.
Disconnect the E7 ECM connector.
Check the resistance of the wire harness side connectors.
Standard:
E7
ECM
IGT6
IGT5
Y
A54393
A81699
-
IGT1
IGT2
IGT3
IGT4
A85848
NG
Tester Connection
Specified Condition
I2-3 - E7-8 (IGT1)
I3-3 - E7-9 (IGT2)
I4-3 - E7-10 (IGT3)
I5-3 - E7-11 (IGT4)
I6-3 - E7-12 (IGT5)
I7-3 - E7-13 (IGT6)
Below 1 Ω
I2-3 or E7-8 (IGT1) - Body ground
I3-3 or E7-9 (IGT2) - Body ground
I4-3 or E7-10 (IGT3) - Body ground
I5-3 or E7-1 (1IGT4) - Body ground
I6-3 or E7-12 (IGT5) - Body ground
I7-3 or E7-13 (IGT6) - Body ground
10 kΩ or higher
REPAIR OR
CONNECTOR
REPLACE
HARNESS
AND
OK
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
Author:
Date:
737
05-548
DIAGNOSTICS
5
-
SFI SYSTEM (3MZ-FE)
CHECK ECM (IGT1, IGT2, IGT3, IGT4, IGT5 OR IGT6 VOLTAGE)
IGT5 (+)
IGT3 (+)
IGT 6 (+) IGT4 (+)
IGT1 (+)
IGT2 (+)
(a)
Check the voltage of the ECM connectors when the engine is cranked.
Standard:
E1 (-)
E7
ECM
IGT5 (+)
E9
ECM
A76903
(b)
IGT3 (+)
IGT 6 (+) IGT4 (+)
IGT2 (+)
IGT1 (+)
(c)
IGT5 (+)
A76903
IGT3 (+)
IGT 6 (+) IGT4 (+)
IGT2 (+)
IGT1 (+)
More than 0.1 V or
less than 4.5 V
Tester Connection
Specified Condition
E7-8 (IGT1) - E9-1 (E1)
E7-9 (IGT2) - E9-1 (E1)
E7-10 (IGT3) - E9-1 (E1)
E7-1 1 (IGT4) - E9-1 (E1)
E7-12 (IGT5) - E9-1 (E1)
E7-13 (IGT6) - E9-1 (E1)
4.5 V or more
HINT:
Reference: Inspection using the oscilloscope.
During cranking or idling, check the waveform of the ECM connectors.
E1 (-)
E7
ECM
Specified Condition
Disconnect the I2, I3, I4, I5, I6 and I7 ignition coil connectors.
Check the voltage of the ECM connectors when the engine is cranked.
Standard:
E1 (-)
E9
ECM
E7
ECM
Tester Connection
E7-8 (GT1) - E9-1 (E1)
E7-9 (IGT2) - E9-1 (E1)
E7-10 (IGT3) - E9-1 (E1)
E7-1 1 (IGT4) - E9-1 (E1)
E7-12 (IGT5) - E9-1 (E1)
E7-13 (IGT6) - E9-1 (E1)
E9
ECM
Tester Connection
Specified Condition
E7-8 (GT1) - E9-1 (E1)
E7-9 (IGT2) - E9-1 (E1)
E7-10 (IGT3) - E9-1 (E1)
E7-1 1 (IGT4) - E9-1 (E1)
E7-12 (IGT5) - E9-1 (E1)
E7-13 (IGT6) - E9-1 (E1)
Correct waveform is as shown
IGT Signal Waveform
2 V/
Division
CH1
GND
20 msec./Division
A88572
NG
REPLACE ECM
OK
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
Author:
Date:
738
05-549
DIAGNOSTICS
6
-
SFI SYSTEM (3MZ-FE)
INSPECT IGNITION COIL ASSY (POWER SOURCE)
(a)
Wire Harness Side
(b)
(c)
I2 I3
I4 I5
I6 I7
Ignition Coil
Disconnect the I2, I3, I4, I5, I6 and I7 ignition coil connectors.
Turn the ignition switch ON.
Check the voltage of the wire harness side connector.
Standard:
Tester Connection
I2-1
I3-1
I4-1
I5-1
I6-1
I7-1
A54393
OK
-
Body
Body
Body
Body
Body
Body
Specified Condition
ground
ground
ground
ground
ground
ground
9 to 14 V
REPLACE IGNITION COIL ASSY
NG
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
Author:
Date:
739
05-550
DIAGNOSTICS
7
-
SFI SYSTEM (3MZ-FE)
CHECK WIRE HARNESS (IGNITION COIL ASSY - IGNITION SWITCH)
(a)
Wire Harness Side
Instrument
Panel J/B
Assy
IG2 Fuse
(b)
(c)
(d)
Check the IG2 fuse.
(1) Remove the IG2 fuse from the instrument panel J/B
assy.
(2) Check for resistance of the IG2 fuse.
Standard: Below 1 Ω
Disconnect the I2, I3, I4, I5, I6 and I7 ignition coil connectors.
Disconnect the II5 ignition switch connector.
Check the resistance of the wire harness side connectors.
Standard:
Tester Connection
I2 I3
I4 I5
I6 I7
Ignition Coil
I2-1
I3-1
I4-1
I5-1
I6-1
I7-1
I15
Ignition Switch
1
5
2
6
3
7
or
or
or
or
or
or
I2-1
I3-1
I4-1
I5-1
I6-1
I7-1
-
I15-6
I15-6
I15-6
I15-6
I15-6
I15-6
I15-6
I15-6
I15-6
I15-6
I15-6
I15-6
(IG2)
(IG2)
(IG2)
(IG2)
(IG2)
(IG2)
-
Specified Condition
(IG2)
(IG2)
(IG2)
(IG2)
(IG2)
(IG2)
Body
Body
Body
Body
Body
Body
Below 1 Ω
ground
ground
ground
ground
ground
ground
10 kΩ or higher
4
8
IG2
A92540
NG
REPAIR OR
CONNECTOR
REPLACE
HARNESS
AND
OK
REPLACE IGNITION COIL ASSY
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
Author:
Date:
740