Infiniti QX56 (Z62). Manual — part 526
EC-82
< ECU DIAGNOSIS INFORMATION >
[VK56VD]
ECM
37
(V)
175
(B)
Cooling fan speed
Input
[Ignition switch: ON]
• Engine stopped
5 V
[Engine is running]
• Idle speed
• After warm-up condition
BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Idle speed
• Before warm-up condition
BATTERY VOLTAGE
(11 - 14 V)
39
(P/B)
45
(L/O)
Power steering pressure sensor
Input
[Engine is running]
• Steering wheel: Being turned
0.5 - 4.5 V
[Engine is running]
• Steering wheel: Not being turned
0.4 - 0.8 V
40
(W/L)
—
Sensor ground
(Fuel rail pressure sensor/En-
gine coolant temperature sen-
sor/Engine oil temperature
sensor)
—
—
—
42
(L/Y)
40
(W/L)
Engine oil temperature sensor
Input
[Engine is running]
0 - 4.8 V
Output voltage varies with engine
oil temperature.
45
(L/O)
—
Sensor ground
(Power steering pressure sen-
sor/ Low fuel pressure sensor/
Electrically-controlled cooling
fan coupling)
—
—
—
46
(SB)
175
(B)
Fuel injector driver power supply
Input
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14 V)
[Ignition switch: OFF]
1.5 V
47
(G)
175
(B)
Heated oxygen sensor 2 heater
(bank 1)
Input
[Engine is running]
• Engine speed: Below 3,600 rpm af-
ter 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
10 V
[Ignition switch: ON]
• Engine: Stopped
[Engine is running]
• Engine speed: Above 3,600 rpm
BATTERY VOLTAGE
(11 - 14 V)
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
–
Signal name
Input/
Output
JPBIA3332ZZ
JPBIA3733ZZ
JMBIA0037GB
ECM
EC-83
< ECU DIAGNOSIS INFORMATION >
[VK56VD]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
48
(L/W)
175
(B)
A/F sensor 1 heater (bank 1)
Input
[Engine is running]
• Warm-up condition
• Idle speed
(More than 140 seconds after start-
ing engine)
2.9 - 8.8 V
49
(LG/
B)
175
(B)
Intake valve timing control sole-
noid valve (bank 1)
Output
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000rpm
7 - 12 V
51
(R)
175
(B)
Fuel injector driver power supply
Output
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14 V)
[Ignition switch: OFF]
1.5 V
52
(L/R)
175
(B)
Heated oxygen sensor 2 heater
(bank 2)
Output
[Engine is running]
• Engine speed: Below 3,600 rpm af-
ter 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
10 V
[Ignition switch: ON]
• Engine: Stopped
[Engine is running]
• Engine speed: Above 3,600 rpm
BATTERY VOLTAGE
(11 - 14 V)
53
(SB)
175
(B)
A/F sensor 1 heater (bank 2)
Output
[Engine is running]
• Warm-up condition
• Idle speed
(More than 140 seconds after start-
ing engine)
2.9 - 8.8 V
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
–
Signal name
Input/
Output
JPBIA3361ZZ
JMBIA0038GB
JMBIA0037GB
JPBIA3361ZZ
EC-84
< ECU DIAGNOSIS INFORMATION >
[VK56VD]
ECM
54
(G/R)
175
(B)
Intake valve timing control sole-
noid valve (bank 2)
Output
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000rpm
7 - 12 V
57
(W)
175
(B)
Throttle control motor (Open)
Output
[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D
• Accelerator pedal: Fully depressed
0 - 14 V
[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: Fully released
0 - 14 V
60
(B)
—
Shield
—
—
—
63
(R)
175
(B)
Throttle control motor (Close)
Output
[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: In the middle of
releasing operation
0 - 14 V
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
–
Signal name
Input/
Output
JMBIA0038GB
JMBIA0031GB
JMBIA0032GB
JMBIA0031GB
ECM
EC-85
< ECU DIAGNOSIS INFORMATION >
[VK56VD]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
64
(V/W)
175
(B)
EVAP canister purge volume
control solenoid valve
Output
[Engine is running]
• Idle speed
• Accelerator pedal: Not depressed
even slightly, after engine starting
BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Engine speed: About 2,000 rpm
(More than 100 seconds after start-
ing engine)
BATTERY VOLTAGE
(11 - 14 V)
67
(V)
175
(B)
Manifold absolute pressure sen-
sor
Input
[Engine is running]
• Warm-up condition
• Idle speed
1.2 V
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
1.5 V
68
(BR/
W)
—
Sensor ground
[Camshaft position sensor (bank
1)]
—
—
—
70
(W/L)
—
Sensor ground
(Manifold absolute pressure
sensor)
—
—
—
73
(P)
99
(LG/
B)
Camshaft position sensor (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 V
[Engine is running]
• Engine speed: 2,000 rpm
3.0 - 5.0 V
74
(L)
175
(B)
A/F sensor 1 (bank 2)
Input
[Ignition switch: ON]
2.5 V
76
(W/
G)
98
(G/
W)
Sensor power supply
(Crankshaft position sensor)
—
[Ignition switch: ON]
5 V
77
(Y/R)
68
(BR/
W)
Sensor power supply
[Camshaft position sensor (bank
1)]
—
[Ignition switch: ON]
5 V
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
–
Signal name
Input/
Output
JMBIA0039GB
JMBIA0040GB
JMBIA0045GB
JMBIA0046GB
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