TROUBLE DIAGNOSIS
ECM Harness Connector Terminal Layout
ABS0037X
A
EC
C
PBIB1192E
ECM Terminals and Reference Value
ABS00DZ6
PREPARATION
1.
2.
D
E
ECM is located behind the passenger side instrument lower
panel. For this inspection, remove passenger side instrument
lower panel.
Remove ECM harness connector.
F
G
H
PBIB1278E
3.
4.
When disconnecting ECM harness connector, loosen it with
levers as far as they will go as shown in the figure.
Connect a break-out box (SST) and Y-cable adapter (SST)
between the ECM and ECM harness connector.
● Use extreme care not to touch 2 pins at one time.
● Data is for comparison and may not be exact.
I
J
K
SEC406D
L
ECM INSPECTION TABLE
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
TERMINAL
NO.
1
WIRE
COLOR
B
ITEM
ECM ground
CONDITION
[Engine is running]
●
Idle speed
DATA (DC Voltage)
Body ground
Approximately 5V
[Engine is running]
2
OR
A/F sensor 1 heater
(bank 1)
●
Warm-up condition
●
Idle speed
PBIB1584E
Edition: 2004 September
EC-115
2005 G35 Coupe
M
TROUBLE DIAGNOSIS
TERMINAL
NO.
3
WIRE
COLOR
W/R
ITEM
Throttle control motor relay
power supply
CONDITION
[Ignition switch: ON]
DATA (DC Voltage)
BATTERY VOLTAGE
(11 - 14V)
0 - 14V
[Ignition switch: ON]
4
BR
Throttle control motor
(Close)
●
Engine stopped
●
Shift lever: D (A/T) or 1st (M/T)
●
Accelerator pedal: Fully released
PBIB1104E
0 - 14V
[Ignition switch: ON]
5
G
Throttle control motor
(Open)
●
Engine stopped
●
Shift lever: D (A/T) or 1st (M/T)
●
Accelerator pedal: Fully depressed
PBIB1105E
[Engine is running]
6
BR/W
●
Engine speed is below 3,600 rpm after the
following conditions are met.
–
Engine: after warming up
–
Keeping the engine speed between 3,500
and 4,000 rpm for 1 minute and at idle for 1
minute under no load.
Heated oxygen sensor 2
heater (bank 2)
0 - 1.0V
[Ignition switch: ON]
●
Engine stopped
[Engine is running]
●
BATTERY VOLTAGE
(11 - 14V)
Engine speed: Above 3,600 rpm.
[Engine is running]
●
Warm-up condition
●
Idle speed
BATTERY VOLTAGE
(11 - 14V)
7 - 12V
10
W/G
Intake valve timing control
solenoid valve (bank 2)
[Engine is running]
●
Warm-up condition
●
When revving engine up to 2,000 rpm
quickly
PBIB1790E
[Engine is running]
●
Warm-up condition
●
Idle speed
BATTERY VOLTAGE
(11 - 14V)
7 - 12V
11
R/W
Intake valve timing control
solenoid valve (bank 1)
[Engine is running]
●
Warm-up condition
●
When revving engine up to 2,000 rpm
quickly
PBIB1790E
Edition: 2004 September
EC-116
2005 G35 Coupe
TROUBLE DIAGNOSIS
TERMINAL
NO.
WIRE
COLOR
ITEM
CONDITION
[Engine is running]
12
L/W
Power steering pressure
sensor
●
Steering wheel: Being turned.
[Engine is running]
●
Steering wheel: Not being turned.
[Engine is running]
●
Warm-up condition
●
Idle speed
DATA (DC Voltage)
0.5 - 4.5V
EC
0.4 - 0.8V
C
Approximately 1.6V
D
NOTE:
The pulse cycle changes depending on rpm at
idle.
13
BR
Crankshaft position sensor
(POS)
A
E
PBIB1041E
Approximately 1.4V
F
[Engine is running]
●
Engine speed: 2,000 rpm.
G
PBIB1042E
[Engine is running]
●
Warm-up condition
●
Idle speed
H
1.0 - 4.0V
I
NOTE:
The pulse cycle changes depending on rpm at
idle.
14
Y
Camshaft position sensor
(PHASE) (bank 2)
PBIB2493E
J
1.0 - 4.0V
K
[Engine is running]
●
Engine speed: 2,000 rpm.
L
PBIB1040E
15
W
Knock sensor
[Engine is running]
●
16
35
Idle speed
W
R
56
L
75
Y
Approximately 2.5V
Approximately 3.1V
[Engine is running]
A/F sensor 1 (Bank 1)
Edition: 2004 September
●
Warm-up condition
●
Idle speed
Approximately 2.6V
Approximately 2.3V
Approximately 2.3V
EC-117
2005 G35 Coupe
M
TROUBLE DIAGNOSIS
TERMINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
BATTERY VOLTAGE
[Engine is running]
●
Warm-up condition
●
Idle speed
(11 - 14V)
NOTE:
The pulse cycle changes depending on rpm at
idle.
21
22
23
G
R/Y
R/B
Injector No. 5
Injector No. 3
Injector No. 1
SEC984C
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Warm-up condition
●
Engine speed: 2,000 rpm.
SEC985C
Approximately 5V
[Engine is running]
24
OR
A/F sensor 1 heater
(bank 2)
●
Warm-up condition
●
Idle speed
PBIB1584E
[Engine is running]
25
P/B
●
Engine speed is below 3,600 rpm after the
following conditions are met.
–
Engine: after warming up
–
Keeping the engine speed between 3,500
and 4,000 rpm for 1 minute and at idle for 1
minute under no load.
Heated oxygen sensor 2
heater (bank 1)
0 - 1.0V
[Ignition switch: ON]
●
Engine stopped
[Engine is running]
●
32
P
EVAP control system pressure sensor
Edition: 2004 September
BATTERY VOLTAGE
(11 - 14V)
Engine speed: Above 3,600 rpm.
[Ignition switch: ON]
EC-118
Approximately 1.8 - 4.8V
2005 G35 Coupe
TROUBLE DIAGNOSIS
TERMINAL
NO.
WIRE
COLOR
ITEM
CONDITION
[Engine is running]
●
Warm-up condition
●
Idle speed
DATA (DC Voltage)
1.0 - 4.0V
EC
NOTE:
The pulse cycle changes depending on rpm at
idle.
33
OR
A
C
PBIB2493E
Camshaft position sensor
(PHASE) (bank 1)
D
1.0 - 4.0V
E
[Engine is running]
●
Engine speed: 2,000 rpm.
F
PBIB1040E
34
Y/G
Intake air temperature sensor
[Engine is running]
Approximately 0 - 4.8V
Output voltage varies with intake
air temperature.
G
BATTERY VOLTAGE
[Engine is running]
●
Warm-up condition
●
Idle speed
(11 - 14V)
H
NOTE:
The pulse cycle changes depending on rpm at
idle.
40
41
42
P
R/L
R/W
Injector No. 6
Injector No. 4
Injector No. 2
I
SEC984C
J
BATTERY VOLTAGE
(11 - 14V)
K
[Engine is running]
●
Warm-up condition
●
Engine speed: 2,000 rpm
L
SEC985C
BATTERY VOLTAGE
M
(11 - 14V)
[Engine is running]
45
L/Y
●
Idle speed
●
Accelerator pedal is not depressed even
slightly, after engine starting.
SEC990C
EVAP canister purge volume control solenoid valve
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Engine speed is about 2,000 rpm (More
than 100 seconds after starting engine).
SEC991C
Edition: 2004 September
EC-119
2005 G35 Coupe
TROUBLE DIAGNOSIS
TERMINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
47
B
Sensor power supply
(Throttle position sensor)
[Ignition switch: ON]
Approximately 5V
48
B/Y
Sensor power supply
(EVAP control system pressure sensor)
[Ignition switch: ON]
Approximately 5V
49
W/L
Sensor power supply
(Refrigerant pressure sensor)
[Ignition switch: ON]
Approximately 5V
[Ignition switch: ON]
50
W
Throttle position sensor 1
●
Engine stopped
●
Shift lever: D (A/T) or 1st (M/T)
●
Accelerator pedal: Fully released
More than 0.36V
[Ignition switch: ON]
●
Engine stopped
●
Shift lever: D (A/T) or 1st (M/T)
●
Accelerator pedal: Fully depressed
Less than 4.75V
[Engine is running]
51
OR
Mass air flow sensor
●
Warm-up condition
●
Idle speed
0.9 - 1.2V
[Engine is running]
●
Warm-up condition
●
Engine speed: 2,500 rpm.
1.5 - 1.9V
[Engine is running]
55
R/Y
●
Warm-up condition
●
Revving engine from idle to 3,000 rpm
quickly after the following conditions are
met.
Heated oxygen sensor 2
(bank 2)
–
57
58
After keeping the engine speed between
3,500 and 4,000 rpm for 1 minute and at idle
for 1 minute under no load.
Approximately 2.6V
R
L
76
W
77
Y
[Engine is running]
A/F sensor 1
(Bank 2)
●
Warm-up condition
●
Idle speed
PU/W
L/R
Y/R
Approximately 2.3V
Approximately 3.1V
Approximately 2.3V
[Engine is running]
60
61
62
0 - Approximately 1.0V
Ignition signal No. 5
Ignition signal No. 3
Ignition signal No. 1
●
Warm-up condition
●
Idle speed
0 - 0.2V
NOTE:
The pulse cycle changes depending on rpm at
idle.
SEC986C
0.1 - 0.4V
[Engine is running]
●
Warm-up condition
●
Engine speed: 2,500 rpm.
SEC987C
Edition: 2004 September
EC-120
2005 G35 Coupe
TROUBLE DIAGNOSIS
TERMINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
A
[Engine is running]
66
W/R
Sensor ground
(Throttle position sensor)
●
Warm-up condition
●
Idle speed
Approximately 0V
EC
Approximately 0V
C
Approximately 5V
D
[Engine is running]
67
68
B/W
Y
Sensor ground
Sensor power supply
(Power steering pressure
sensor)
●
Warm-up condition
●
Idle speed
[Ignition switch: ON]
[Ignition switch: ON]
●
69
R/L
Throttle position sensor 2
Engine stopped
●
Shift lever: D (A/T) or 1st (M/T)
●
Accelerator pedal: Fully released
E
Less than 4.75V
F
[Ignition switch: ON]
●
Engine stopped
●
Shift lever: D (A/T) or 1st (M/T)
●
Accelerator pedal: Fully depressed
More than 0.36V
G
[Engine is running]
70
73
R/B
Y/B
Refrigerant pressure sensor
Engine coolant temperature
sensor
●
Warm-up condition
●
Both A/C switch and blower switch: ON.
(Compressor operates.)
[Engine is running]
H
1.0 - 4.0V
Approximately 0 - 4.8V
Output voltage varies with
engine coolant temperature.
[Engine is running]
74
L/B
●
Warm-up condition
●
Revving engine from idle to 3,000 rpm
quickly after the following conditions are
met.
Heated oxygen sensor 2
(bank 1)
–
I
J
K
0 - Approximately 1.0V
After keeping the engine speed between
3,500 and 4,000 rpm for 1 minute and at idle
for 1 minute under no load.
L
[Engine is running]
78
B/Y
Sensor ground
(Heated oxygen sensor)
●
Warm-up condition
●
Idle speed
[Engine is running]
79
80
81
GY/R
GY
G/R
Ignition signal No. 6
Ignition signal No. 4
Ignition signal No. 2
●
Warm-up condition
●
Idle speed
Approximately 0V
M
0 - 0.2V
NOTE:
The pulse cycle changes depending on rpm at
idle.
SEC986C
0.1 - 0.4V
[Engine is running]
●
Warm-up condition
●
Engine speed: 2,500 rpm.
SEC987C
Edition: 2004 September
EC-121
2005 G35 Coupe
TROUBLE DIAGNOSIS
TERMINAL
NO.
82
83
85
WIRE
COLOR
GY/L
B/R
PU
ITEM
CONDITION
Sensor ground
(Accelerator pedal position
sensor 1)
[Engine is running]
Sensor ground
(Accelerator pedal position
sensor 2)
[Engine is running]
Data link connector
●
Warm-up condition
●
Idle speed
●
Warm-up condition
●
Idle speed
[Ignition switch: ON]
●
CONSULT-II or GST: Disconnected.
DATA (DC Voltage)
Approximately 0V
Approximately 0V
Approximately 5V - Battery voltage (11 - 14V)
86
P
CAN communication line
[Ignition switch: ON]
Approximately 1.1 - 2.3V
Output voltage varies with the
communication status.
90
BR/Y
Sensor power supply
(Accelerator pedal position
sensor 1)
[Ignition switch: ON]
Approximately 5V
91
G
Sensor power supply
(Accelerator pedal position
sensor 2)
[Ignition switch: ON]
Approximately 5V
94
L
CAN communication line
[Ignition switch: ON]
Approximately 2.6 - 3.2V
Output voltage varies with the
communication status.
[Ignition switch: ON]
98
LG/B
Accelerator pedal position
sensor 2
●
Engine stopped
●
Accelerator pedal: Fully released
[Ignition switch: ON]
●
Engine stopped
●
Accelerator pedal: Fully depressed
[Ignition switch: ON]
●
ASCD steering switch: OFF
[Ignition switch: ON]
●
99
G/Y
ASCD steering switch
MAIN switch: Pressed
[Ignition switch: ON]
●
CANCEL switch: Pressed
[Ignition switch: ON]
●
RESUME/ACCELERATE switch: Pressed
[Ignition switch: ON]
●
SET/COAST switch: Pressed
[Ignition switch: OFF]
●
101
P/L
Stop lamp switch
Brake pedal: Fully released
[Ignition switch: OFF]
●
Brake pedal: Slightly depressed
[Ignition switch: ON]
●
102
G/OR
PNP switch
Shift lever: P or N (A/T), Neutral (M/T)
[Ignition switch: ON]
●
104
G/W
Throttle control motor relay
Edition: 2004 September
0.15 - 0.60V
Except above position
1.95 - 2.40V
Approximately 4V
Approximately 0V
Approximately 1V
Approximately 3V
Approximately 2V
Approximately 0V
BATTERY VOLTAGE
(11 - 14V)
Approximately 0V
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
0 - 1.0V
EC-122
2005 G35 Coupe
TROUBLE DIAGNOSIS
TERMINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
A
[Ignition switch: ON]
106
107
BR
L/OR
Accelerator pedal position
sensor 1
Fuel tank temperature sensor
●
Engine stopped
●
Accelerator pedal: Fully released
0.5 - 1.0V
EC
3.9 - 4.7V
C
[Ignition switch: ON]
●
Engine stopped
●
Accelerator pedal: Fully depressed
[Engine is running]
Approximately 0 - 4.8V
Output voltage varies with fuel
tank temperature.
D
[Ignition switch: ON]
108
109
SB
W/L
ASCD brake switch
●
Brake pedal: Slightly depressed (A/T)
●
Brake pedal and/or clutch pedal: Slightly
depressed (M/T)
●
Brake pedal: Fully released (A/T)
●
Brake pedal and clutch pedal: Fully released
(M/T)
BATTERY VOLTAGE
(11 - 14V)
G
[Ignition switch: OFF]
0V
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
H
0 - 1.5V
I
BATTERY VOLTAGE
(11 - 14V)
J
Ignition switch
●
W
F
[Ignition switch: ON]
[Engine is running]
[Ignition switch: OFF]
111
E
Approximately 0V
ECM relay
(Self shut-off)
A few seconds after turning ignition switch
OFF
[Ignition switch: OFF]
●
More than a few seconds after turning ignition switch OFF
[Ignition switch: ON]
●
113
B/OR
Fuel pump relay
For 1 second after turning ignition switch ON
K
0 - 1.5V
[Engine is running]
[Ignition switch: ON]
●
More than 1 second after turning ignition
switch ON.
[Engine is running]
BATTERY VOLTAGE
(11 - 14V)
L
Body ground
M
115
116
B/R
B
ECM ground
117
GY/L
EVAP canister vent control
valve
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
119
120
P
L
Power supply for ECM
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
121
R/W
Power supply for ECM
(Back-up)
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
●
Idle speed
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Edition: 2004 September
EC-123
2005 G35 Coupe