Infiniti G37 Coupe. Manual - part 851

LAN

MAIN LINE BETWEEN ADP AND ABS CIRCUIT

LAN-77

< COMPONENT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

NO

>> Repair the main line between the harness connector E106 and the ABS actuator and electric unit

(control unit).

LAN-78

< COMPONENT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

ECM BRANCH LINE CIRCUIT

ECM BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001679420

1.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the terminals and connectors of the ECM for damage, bend and loose connection (unit side and
connector side).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of ECM.

2.

Check the resistance between the ECM harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the ECM branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ECM. Refer to 

EC-140, "Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the ECM. Refer to 

EC-16, "ADDITIONAL SERVICE WHEN REPLACING

CONTROL UNIT (ECM) : Special Repair Requirement"

.

YES (Past error)>>Error was detected in the ECM branch line.
NO

>> Repair the power supply and the ground circuit.

ECM harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M107

114

113

Approx. 108 – 132

LAN

A-BAG BRANCH LINE CIRCUIT

LAN-79

< COMPONENT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

A-BAG BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001679421

1.

CHECK AIR BAG DIAGNOSIS SENSOR UNIT

Check the air bag diagnosis sensor unit. Refer to 

SRC-5, "Work Flow"

.

Is the inspection result normal?

YES

>> Replace the main harness.

NO

>> Replace parts whose air bag system has a malfunction.

LAN-80

< COMPONENT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

AV BRANCH LINE CIRCUIT

AV BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001679422

1.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the terminals and connectors of the AV control unit for damage, bend and loose connection (unit
side and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of AV control unit.

2.

Check the resistance between the AV control unit harness connector terminals.

-

Models with NAVI

-

Models without NAVI

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the AV control unit branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the AV control unit. Refer to the following.
• Base audio without navigation: 

AV-39, "AV CONTROL UNIT : Diagnosis Procedure"

• BOSE audio without navigation: 

AV-160, "AV CONTROL UNIT : Diagnosis Procedure"

• BOSE audio with navigation: 

AV-433, "AV CONTROL UNIT : Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the AV control unit. Refer to the following.

• Base audio without navigation: 

AV-109, "Exploded View"

• BOSE audio without navigation: 

AV-343, "Exploded View"

• BOSE audio with navigation: 

AV-608, "Exploded View"

YES (Past error)>>Error was detected in the AV control unit branch line.
NO

>> Repair the power supply and the ground circuit.

AV control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M87

52

53

Approx. 54 – 66

AV control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M85

86

87

Approx. 54 – 66