Infiniti FX35, FX50 (S51). Manual - part 1183

ECM

HAC-129

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

24

(Y)

23

(BR)

Engine coolant temperature 
sensor

Input

[Engine is running]

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

31

(B)

—

Sensor ground
(Heated oxygen sensor 2)

—

—

—

32

(W)

31

(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

34

(V)

—

Sensor ground
(Engine oil temperature sen-
sor)

—

—

—

35

(B/W)

—

Sensor ground
(Knock sensor)

—

—

—

36

(LG)

31

(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

38

(GR)

—

Sensor ground
[Mass air flow sensor (bank 2)]

—

—

—

39

(R)

34

(V)

Engine oil temperature sensor

Input

[Engine is running]

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

40

(W)

35

(B/W)

Knock sensor (bank 1)

Input

[Engine is running]
• Idle speed

2.5 V*

1

42

(B)

—

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

—

—

—

43

(SB)

38

(GR)

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

1.3 - 1.6 V

44

(W)

35

(B/W)

Knock sensor (bank 2)

Input

[Engine is running]
• Idle speed

2.5 V*

1

47

(L)

42

(B)

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

1.3 - 1.6 V

48

(Y)

42

(B)

Intake air temperature sensor

Input

[Engine is running]

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

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

–

Signal name

Input/

Output

HAC-130

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONER]

ECM

49

(V)

128

(B)

Throttle control motor power 
supply (bank 1)

Input

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

50

(G)

128

(B)

Throttle control motor (bank 1) 
(Open)

Output

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

0 - 14 V

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

0 - 14 V

51

(O)

128

(B)

Intake valve timing control so-
lenoid 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

52

(L)

128

(B)

Intake valve timing control so-
lenoid 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 - 12V

53

(BR)

128

(B)

Throttle control motor (bank 1) 
(Close)

Output

[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: In the middle of 

releasing operation

0 - 14 V

54

(B)

—

ECM ground

—

—

—

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

–

Signal name

Input/

Output

JMBIA0031GB

JMBIA0032GB

JMBIA0038GB

JMBIA0038GB

JMBIA0033GB

ECM

HAC-131

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

55

(P)

128

(B)

Heated oxygen sensor 2 heat-
er (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

10 V

[Ignition switch: ON]
• Engine: Stopped
[Engine is running]
• Engine speed: Above 3,600 rpm

BATTERY VOLTAGE
(11 - 14 V)

56

(R)

128

(B)

Heated oxygen sensor 2 heat-
er (bank 1)

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

10 V

[Ignition switch: ON]
• Engine: Stopped
[Engine is running]
• Engine speed: Above 3,600 rpm

BATTERY VOLTAGE
(11 - 14 V)

57

(Y)

128

(B)

Exhaust valve timing control 
solenoid valve (bank 2)

Output

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

BATTERY VOLTAGE
(11 - 14 V)

[Engine is running]
• Warm-up condition
• Around 2,500 rpm while the engine 

speed is rising

7 - 12 V

58

(B)

—

Sensor ground
[Camshaft position sensor 
(bank 1)/ Exhaust valve timing 
control position sensor (bank 
1)]

—

—

—

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

–

Signal name

Input/

Output

JMBIA0037GB

JMBIA0037GB

JMBIA0034GB

HAC-132

< ECU DIAGNOSIS INFORMATION >

[AUTOMATIC AIR CONDITIONER]

ECM

59

(W)

58

(B)

Camshaft position sensor 
(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

(G)

58

(B)

Exhaust valve timing control 
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

61

(G)

128

(B)

Exhaust valve timing control 
solenoid valve (bank 1)

Output

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

BATTERY VOLTAGE
(11 - 14 V)

[Engine is running]
• Warm-up condition
• Around 2,500 rpm while the engine 

speed is rising

7 - 12 V

62

(O)

—

Sensor ground
[Camshaft position sensor 
(bank 2)/ Exhaust valve timing 
control position sensor (bank 
2)]

—

—

—

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

–

Signal name

Input/

Output

JMBIA0045GB

JMBIA0046GB

JMBIA0043GB

JMBIA0044GB

JMBIA0034GB