Infiniti G37 Coupe. Manual — part 585
ECM
EC-521
< ECU DIAGNOSIS >
[VQ37VHR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
30
(Y)
40
(R)
Throttle position sensor
1 (bank 1)
Input
[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully released
More than 0.36V
[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully depressed
Less than 4.75V
31
(R)
48
(B)
Throttle position sensor
1 (bank 2)
Input
[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully released
More than 0.36V
[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully depressed
Less than 4.75V
33
(SB)
128
(B)
Heated oxygen sensor 2
heater (bank 2)
Output
[Engine is running]
• Engine speed: 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
10V
[Ignition switch: ON]
• Engine stopped
[Engine is running]
• Engine speed: Above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
34
(B)
40
(R)
Throttle position sensor
2 (bank 1)
Input
[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully released
Less than 4.75V
[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully depressed
More than 0.36V
35
(W)
48
(B)
Throttle position sensor
2 (bank 2)
Input
[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully released
Less than 4.75V
[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully depressed
More than 0.36V
36
(O)
—
Sensor ground
[Brake booster pressure
sensor]
—
—
—
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
JMBIA0037GB
EC-522
< ECU DIAGNOSIS >
[VQ37VHR]
ECM
37
(W)
128
(B)
Crankshaft position sen-
sor (POS)
Input
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idle
4.0 - 5.0
[Engine is running]
• Engine speed: 2,000 rpm
4.0 - 5.0
38
(O)
96
(P)
Manifold absolute pres-
sure (MAP) sensor
Input
[Engine is running]
• Warm-up condition
• Idle speed
1.2V
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
1.5V
39
(P)
36
(O)
Brake booster pressure
sensor
Input
[Engine is running]
• Warm-up condition
• Idle speed
• Brake pedal: Fully released
1.2V
[Engine is running]
• Warm-up condition
• Idle speed
• Brake pedal: Fully depressed
3.0V
40
(R)
—
Sensor ground
[Throttle position sensor
(bank 1)]
—
—
—
43
(G)
48
(B)
Sensor power supply
[Throttle position sensor
(bank 2)]
—
[Ignition switch: ON]
5V
44
(L)
40
(R)
Sensor power supply
[Throttle position sensor
(bank 1)]
—
[Ignition switch: ON]
5V
45
(LG)
36
(O)
Sensor power supply
[Brake booster pressure
sensor]
—
[Ignition switch: ON]
5V
46
(R)
128
(B)
Sensor power supply
[Crankshaft position
sensor (POS)]
—
[Ignition switch: ON]
5V
47
(Y)
—
Sensor ground
[Crankshaft position
sensor (POS)]
—
—
—
48
(B)
—
Sensor ground
[Throttle position sensor
(bank 2)]
—
—
—
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
JMBIA0041GB
JMBIA0042GB
ECM
EC-523
< ECU DIAGNOSIS >
[VQ37VHR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
49
(GR)
128
(B)
Throttle control motor
(Close) (bank 2)
Output
[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: In the middle of re-
leasing operation
0 - 14V
50
(V)
128
(B)
Throttle control motor
(Open) (bank 2)
Output
[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully depressed
0 - 14V
[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully released
0 - 14V
52
(R)
128
(B)
Throttle control motor re-
lay power supply (bank
2)
Input
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
53
(W)
128
(B)
Ignition switch
Input
[Ignition switch: OFF]
0V
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
54
(Y)
—
CAN communication line
[VVEL control module]
Input/
output
—
—
55
(LG)
—
CAN communication line
[VVEL control module]
Input/
output
—
—
57
(L)
128
(B)
A/F sensor 1 (bank 1)
Input
[Ignition switch: ON]
2.2V
59
(O)
128
(B)
Camshaft position sen-
sor (PHASE) (bank 1)
Input
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idle
3.0 - 5.0
[Engine is running]
• Engine speed: 2,000 rpm
3.0 - 5.0
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
JMBIA0033GB
JMBIA0031GB
JMBIA0032GB
JMBIA0045GB
JMBIA0046GB
EC-524
< ECU DIAGNOSIS >
[VQ37VHR]
ECM
60
(G)
128
(B)
Sensor power supply
[Camshaft position sen-
sor (PHASE) (bank 1),
Manifold absolute pres-
sure (MAP) sensor, Pow-
er steering pressure
sensor]
—
[Ignition switch: ON]
5V
61
(R)
128
(B)
A/F sensor 1 (bank 1)
Input
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
1.8V
Output voltage varies with air fuel
ratio.
63
(L)
128
(B)
Camshaft position sen-
sor (PHASE) (bank 2)
Input
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idle
3.0 - 5.0
[Engine is running]
• Engine speed: 2,000 rpm
3.0 - 5.0
64
(SB)
128
(B)
Sensor power supply
[Camshaft position sen-
sor (PHASE) (bank 2),
Battery current sensor]
—
[Ignition switch: ON]
5V
65
(LG)
128
(B)
A/F sensor 1 (bank 2)
Input
[Ignition switch: ON]
2.2V
66
(V)
128
(B)
A/F sensor 1 (bank 2)
Input
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
1.8V
Output voltage varies with air fuel
ratio.
67
(P)
128
(B)
Intake air temperature
sensor (bank 1)
Input
[Engine is running]
0 - 4.8V
Output voltage varies with intake
air temperature.
68
(LG)
—
Sensor ground
[Mass air flow sensor
(bank 1), Intake air tem-
perature sensor (bank
1)]
—
—
—
69
(W)
128
(B)
Knock sensor (bank 2)
Input
[Engine is running]
• Idle speed
2.5V*
1
71
(Y)
128
(B)
Engine coolant tempera-
ture sensor
Input
[Engine is running]
0 - 4.8V
Output voltage varies with engine
coolant temperature.
72
(—)
—
Sensor ground
(Knock sensor)
—
—
—
73
(W)
128
(B)
Knock sensor (bank 1)
Input
[Engine is running]
• Idle speed
2.5V*
1
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
JMBIA0045GB
JMBIA0046GB
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