Infiniti EX35. Manual - part 686

EC-486

< ECU DIAGNOSIS >

[VQ35HR]

ECM

50

(V)

128

(B)

Throttle control motor 
(Open) (bank 2)

Output

[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully depressed

0 - 14 V

[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully released

0 - 14 V

52

(R)

128

(B)

Throttle control motor relay 
power supply (bank 2)

Input

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

53

(P)

128

(B)

Ignition switch

Input

[Ignition switch: OFF]

0V

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

57

(L)

128

(B)

A/F sensor 1 (bank 1)

Input

[Ignition switch: ON]

2.2 V

58

(GR)

88

(LG)

Exhaust valve timing con-
trol position sensor (bank 
1)

Input

[Engine is running]
• Warm-up condition
• Idle speed

NOTE:
The pulse cycle changes depending 
on rpm at idle

4.0 - 5.0 V

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

4.0 - 5.0 V

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

JMBIA0031GB

JMBIA0032GB

JMBIA0043GB

JMBIA0044GB

ECM

EC-487

< ECU DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

59

(O)

96

(B)

Camshaft position sensor 
(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 V

[Engine is running]
• Engine speed: 2,000 rpm

3.0 - 5.0 V

60

(R)

96

(B)

Sensor power supply
[Camshaft position sensor 
(PHASE) (bank 1), Exhaust 
valve timing control posi-
tion sensor (bank 1), Power 
steering pressure sensor]

—

[Ignition switch: ON]

5 V

61

(R)

128

(B)

A/F sensor 1 (bank 1)

Input

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

1.8 V
Output voltage varies with air fuel 
ratio.

62

(G)

88

(LG)

Exhaust valve timing con-
trol position sensor (bank 
2)

Input

[Engine is running]
• Warm-up condition
• Idle speed

NOTE:
The pulse cycle changes depending 
on rpm at idle

4.0 - 5.0 V

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

4.0 - 5.0 V

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

JMBIA0045GB

JMBIA0046GB

JMBIA0043GB

JMBIA0044GB

EC-488

< ECU DIAGNOSIS >

[VQ35HR]

ECM

63

(SB)

92

(P)

Camshaft position sensor 
(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 V

[Engine is running]
• Engine speed: 2,000 rpm

3.0 - 5.0 V

64

(W)

92

(P)

Sensor power supply
[Camshaft position sensor 
(PHASE) (bank 2), Exhaust 
valve timing control posi-
tion sensor (bank 2), Bat-
tery current sensor]

—

[Ignition switch: ON]

5 V

65

(V)

128

(B)

A/F sensor 1 (bank 2)

Input

[Ignition switch: ON]

2.2 V

66

(LG)

128

(B)

A/F sensor 1 (bank 2)

Input

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

1.8 V
Output voltage varies with air fuel 
ratio.

67

(P)

68

(LG)

Intake air temperature sen-
sor (bank 1)

Input

[Engine is running]

0 - 4.8 V
Output voltage varies with intake 
air temperature.

68

(LG)

—

Sensor ground
[Mass air flow sensor (bank 
1), Intake air temperature 
sensor (bank 1)]

—

—

—

69

(W)

72

(—)

Knock sensor (bank 2)

Input

[Engine is running]
• Idle speed

2.5 V*

1

71

(Y)

84

(B)

Engine coolant tempera-
ture sensor

Input

[Engine is running]

0 - 4.8 V
Output voltage varies with engine 
coolant temperature.

72

(—)

—

Sensor ground
(Knock sensor)

—

—

—

73

(W)

72

(—)

Knock sensor (bank 1)

Input

[Engine is running]
• Idle speed

2.5 V*

1

76

(W)

84

(B)

Heated oxygen sensor 2 
(bank 1)

Input

[Engine is running]
• Revving engine from idle to 3,000 

rpm quickly after the following condi-
tions 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

0 - 1.0 V

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

JMBIA0045GB

JMBIA0046GB

ECM

EC-489

< ECU DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

77

(SB)

68

(LG)

Mass air flow sensor (bank 
1)

Input

[Engine is running]
• Warm-up condition
• Idle speed

0.8 - 1.1 V

[Engine is running]
• Warm-up condition
• Engine speed: 2,500 rpm

1.4 - 1.7  V

78

(G)

84

(B)

Engine oil temperature 
sensor

Input

[Engine is running]

0 - 4.8 V
Output voltage varies with engine 
oil temperature.

79

(GR)

94

(LG)

Mass air flow sensor (bank 
2)

Input

[Engine is running]
• Warm-up condition
• Idle speed

0.8 - 1.1 V

[Engine is running]
• Warm-up condition
• Engine speed: 2,500 rpm

1.4 - 1.7 V

80

(O)

84

(B)

Heated oxygen sensor 2 
(bank 2)

Input

[Engine is running]
• Revving engine from idle to 3,000 

rpm quickly after the following condi-
tions 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

0 - 1.0 V

81

(R)

128

(B)

Fuel injector No. 3

Output

[Engine is running]
• Warm-up condition
• Idle speed

NOTE:
The pulse cycle changes depending 
on rpm at idle

BATTERY VOLTAGE

(11 - 14 V)

82

(V)

Fuel injector No. 6

85

(BR)

Fuel injector No. 2

86

(W)

Fuel injector No. 5

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

BATTERY VOLTAGE

(11 - 14 V)

89

(GR)

Fuel injector No. 1

90

(O)

Fuel injector No. 4

83

(G)

94

(LG)

Intake air temperature sen-
sor (bank 2)

Input

[Engine is running]

0 - 4.8 V
Output voltage varies with intake 
air temperature.

84

(B)

—

Sensor ground
(Heated oxygen sensor 2, 
Engine coolant tempera-
ture sensor, Engine oil tem-
perature sensor)

—

—

—

87

(Y)

96

(B)

Power steering pressure 
sensor

Output

[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

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

JMBIA0047GB

JMBIA0048GB