Infiniti G37 Coupe. Manual — part 780
ECM
HAC-109
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
21
(GR)
128
(B)
EVAP canister purge vol-
ume control solenoid
valve
Output
[Engine is running]
• Idle speed
• Accelerator pedal: Not depressed even
slightly, after engine starting
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Engine speed: About 2,000 rpm (More
than 100 seconds after starting engine)
BATTERY VOLTAGE
(11 - 14V)
22
(R)
128
(B)
Fuel pump relay
Output
[Ignition switch: ON]
• For 1 second after turning ignition switch
ON
[Engine is running]
0 - 1.5V
[Ignition switch: ON]
• More than 1 second after turning ignition
switch ON
BATTERY VOLTAGE
(11 - 14V)
24
(P)
128
(B)
ECM relay
(Self shut-off)
Output
[Engine is running]
[Ignition switch: OFF]
• A few seconds after turning ignition
switch OFF
0 - 1.5V
[Ignition switch: OFF]
• More than a few seconds after turning
ignition switch OFF
BATTERY VOLTAGE
(11 - 14V)
25
(O)
128
(B)
Throttle control motor re-
lay
Output
[Ignition switch: ON
→
OFF]
0 - 1.0V
↓
BATTERY VOLTAGE
(11 - 14V)
↓
0V
[Ignition switch: ON]
0 - 1.0V
28
(BR)
128
(B)
VVEL actuator motor re-
lay abort signal
[VVEL control module]
Output
[Engine is running]
• Warm-up condition
• Idle speed
0V
29
(G)
128
(B)
Intake valve timing con-
trol solenoid valve (bank
2)
Output
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000rpm
7 - 12V
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
JMBIA0039GB
JMBIA0040GB
JMBIA0038GB
HAC-110
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
ECM
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
ECM
HAC-111
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
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
HAC-112
< ECU DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
ECM
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
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