Infiniti QX56 (Z62). Manual - part 526

 

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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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