Infiniti G37 Coupe. Manual - part 843

LAN

PSB BRANCH LINE CIRCUIT

LAN-45

< COMPONENT DIAGNOSIS >

[CAN]

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PSB BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001666027

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-46

< COMPONENT DIAGNOSIS >

[CAN]

TCM BRANCH LINE CIRCUIT

TCM BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001666031

1.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the following terminals and connectors for damage, bend and loose connection (unit side and con-
nector side).

-

A/T assembly

-

Harness connector F103

-

Harness connector M116

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 A/T assembly.

2.

Check the resistance between the A/T assembly harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the TCM branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

TM-163, "Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the control valve with TCM. Refer to 

TM-232, "Exploded View"

.

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

>> Repair the power supply and the ground circuit.

A/T assembly harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

F51

3

8

Approx. 54 – 66

LAN

AFS BRANCH LINE CIRCUIT

LAN-47

< COMPONENT DIAGNOSIS >

[CAN]

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AFS BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001666032

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-48

< COMPONENT DIAGNOSIS >

[CAN]

DLC BRANCH LINE CIRCUIT

DLC BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000001666033

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