Infiniti G37 Coupe. Manual - part 781

 

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Infiniti G37 Coupe. Manual - part 781

 

 

ECM

HAC-113

< ECU DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

60

(G)

128

(B)

Sensor power supply
[Camshaft position sen-
sor (PHASE) (bank 1), 
Manifold absolute pres-
sure (MAP) sensor, Pow-
er steering pressure 
sensor]

—

[Ignition switch: ON]

5V

61

(R)

128

(B)

A/F sensor 1 (bank 1)

Input

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

1.8V
Output voltage varies with air fuel 
ratio.

63

(L)

128

(B)

Camshaft position sen-
sor (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

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

3.0 - 5.0

64

(SB)

128

(B)

Sensor power supply
[Camshaft position sen-
sor (PHASE) (bank 2), 
Battery current sensor]

—

[Ignition switch: ON]

5V

65

(LG)

128

(B)

A/F sensor 1 (bank 2)

Input

[Ignition switch: ON]

2.2V

66

(V)

128

(B)

A/F sensor 1 (bank 2)

Input

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

1.8V
Output voltage varies with air fuel 
ratio.

67

(P)

128

(B)

Intake air temperature 
sensor (bank 1)

Input

[Engine is running]

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

68

(LG)

—

Sensor ground
[Mass air flow sensor 
(bank 1), Intake air tem-
perature sensor (bank 
1)]

—

—

—

69

(W)

128

(B)

Knock sensor (bank 2)

Input

[Engine is running]
• Idle speed

2.5V*

1

71

(Y)

128

(B)

Engine coolant tempera-
ture sensor

Input

[Engine is running]

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

72

(—)

—

Sensor ground
(Knock sensor)

—

—

—

73

(W)

128

(B)

Knock sensor (bank 1)

Input

[Engine is running]
• Idle speed

2.5V*

1

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal  name

Input/

Output

JMBIA0045GB

JMBIA0046GB

HAC-114

< ECU DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

ECM

76

(W)

128

(B)

Heated oxygen sensor 2 
(bank 1)

Input

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

quickly 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

0 - 1.0V

77

(SB)

68

(LG)

Mass air flow sensor 
(bank 1)

Input

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

0.7 - 1.2V

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

1.3 - 1.7V

78

(G)

84

(B)

Engine oil temperature 
sensor

Input

[Engine is running]

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

79

(BR)

94

(Y)

Mass air flow sensor 
(bank 2)

Input

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

0.7 - 1.2V

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

1.3 - 1.7V

80

(O)

128

(B)

Heated oxygen sensor 2 
(bank 2)

Input

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

quickly 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

0 - 1.0V

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 - 14V)

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 - 14V)

89

(GR)

Fuel injector No. 1

90

(O)

Fuel injector No. 4

83

(LG)

94

(Y)

Intake air temperature 
sensor (bank 2)

Input

[Engine is running]

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

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

JMBIA0047GB

JMBIA0048GB

ECM

HAC-115

< ECU DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

84

(B)

—

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

—

—

—

87

(Y)

96

(P)

Power steering pressure 
sensor

Output

[Engine is running]
• Steering wheel: Being turned

0.5 - 4.5V

[Engine is running]
• Steering wheel: Not being turned

0.4 - 0.8V

91

(SB)

95

(G)

Battery current sensor

Input

[Engine is running]

• Battery: Fully charged*

2

• Idle speed

2.6 - 3.5V

92

(G)

—

Sensor ground
[Camshaft position sen-
sor (PHASE) (bank 2)]

—

—

—

93

(P)

128

(B)

Power supply for ECM 
(Back-up)

Input

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

94

(Y)

—

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

—

—

—

95

(G)

—

Sensor ground
(Battery current sensor)

—

—

—

96

(P)

—

Sensor ground
[Camshaft position sen-
sor (PHASE) (bank 
1),Manifold absolute 
pressure (MAP) sensor, 
Power steering pressure 
sensor]

—

—

—

97

(R)

100
(W)

Accelerator pedal posi-
tion sensor 1

Input

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

0.45 - 1.00V

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

4.2 - 4.8V

98

(P)

104

(GR)

Accelerator pedal posi-
tion sensor 2

Input

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

0.22 - 0.50V

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

2.1 - 2.5V

99

(L)

100
(W)

Sensor power supply
(Accelerator pedal posi-
tion sensor 1)

—

[Ignition switch: ON]

5V

100
(W)

—

Sensor ground
(Accelerator pedal posi-
tion sensor 1)

—

—

—

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal  name

Input/

Output

HAC-116

< ECU DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

ECM

101

(SB)

108

(Y)

ICC steering switch
(models with ICC sys-
tem)

Input

[Ignition switch: ON]
• ICC steering switch: OFF

4.3V

[Ignition switch: ON]
• MAIN switch: Pressed

0V

[Ignition switch: ON]
• CANCEL switch: Pressed

1.3V

[Ignition switch: ON]
• RESUME/ACCELERATE switch: 

Pressed

3.7V

[Ignition switch: ON]
• SET/COAST switch: Pressed

3V

[Ignition switch: ON]
• DISTANCE switch: Pressed

2.2V

101

(SB)

108

(Y)

ASCD steering switch
(models with ASCD sys-
tem)

Input

[Ignition switch: ON]
• ASCD steering switch: OFF

4V

[Ignition switch: ON]
• MAIN switch: Pressed

0V

[Ignition switch: ON]
• CANCEL switch: Pressed

1V

[Ignition switch: ON]
• RESUME/ACCELERATE switch: 

Pressed

3V

[Ignition switch: ON]
• SET/COAST switch: Pressed

2V

102

(GR)

112

(SB)

EVAP control system 
pressure sensor

Input

[Ignition switch: ON]

1.8 - 4.8V

103

(G)

104

(GR)

Sensor power supply
(Accelerator pedal posi-
tion sensor 2)

—

[Ignition switch: ON]

5V

104

(GR)

—

Sensor ground
(Accelerator pedal posi-
tion sensor 2)

—

—

—

105

(L)

116

(P)

Refrigerant pressure 
sensor

Input

[Engine is running]
• Warm-up condition
• Both A/C switch and blower fan motor 

switch: ON (Compressor operates)

1.0 - 4.0V

106
(W)

128

(B)

Fuel tank temperature 
sensor

Input

[Engine is running]

0 - 4.8V
Output voltage varies with fuel 
tank temperature.

107

(BR)

112

(SB)

Sensor power supply
(EVAP control system 
pressure sensor)

—

[Ignition switch: ON]

5V

108

(Y)

—

Sensor ground
(ASCD/ICC steering 
switch)

—

—

—

109

(G)

128

(B)

PNP switch

Input

[Ignition switch: ON]
• Selector lever: P or N (A/T), Neutral (M/

T)

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch: ON]
• Selector lever: Except above

0V

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

 

 

 

 

 

 

 

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