Infiniti G37 Coupe. Manual - part 861

LAN

BCM BRANCH LINE CIRCUIT

LAN-117

< COMPONENT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

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BCM BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001679478

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 BCM 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 BCM.

2.

Check the resistance between the BCM harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the BCM branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

BCS-38, "Diagnosis Procedure"

.

Is the inspection result normal?

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

BCS-79, "Exploded View"

.

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

>> Repair the power supply and the ground circuit.

BCM harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M122

91

90

Approx. 54 – 66

LAN-118

< COMPONENT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

PSB BRANCH LINE CIRCUIT

PSB BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001679479

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 pre-crash seat belt 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 pre-crash seat belt control unit.

2.

Check the resistance between the pre-crash seat belt control unit harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the pre-crash seat belt control unit branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the pre-crash seat belt control unit. Refer to the following.
• Power supply circuit: 

SBC-27, "Component Function Check"

• Ground circuit: 

SBC-28, "Component Function Check"

Is the inspection result normal?

YES (Present error)>>Replace the pre-crash seat belt control unit. Refer to 

SBC-40, "Exploded View"

.

YES (Past error)>>Error was detected in the pre-crash seat belt control unit branch line.
NO

>> Repair the power supply and the ground circuit.

Pre-crash seat belt control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M110

24

22

Approx. 54 – 66

LAN

AFS BRANCH LINE CIRCUIT

LAN-119

< COMPONENT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

C

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A

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P

N

AFS BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001679481

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 AFS 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 AFS control unit.

2.

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

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the AFS control unit branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the AFS control unit. Refer to 

EXL-61, "AFS CONTROL

UNIT : Diagnosis Procedure"

.

Is the inspection result normal?

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

EXL-196, "Exploded View"

.

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

>> Repair the power supply and the ground circuit.

AFS control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M16

30

7

Approx. 54 – 66

LAN-120

< COMPONENT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

DLC BRANCH LINE CIRCUIT

DLC BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001679482

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 data link connector for damage, bend and loose connection
(connector side and harness side).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

Check the resistance between the data link connector terminals.

Is the measurement value within the specification?

YES (Present error)>>Check the decision of CAN system type again.
YES (Past error)>>Error was detected in the data link connector branch line circuit.
NO

>> Repair the data link connector branch line.

Data link connector

Resistance (

Ω

)

Connector No.

Terminal No.

M24

6

14

Approx. 54 – 66