Infiniti QX56 (Z62). Manual - part 893

LAN

AV BRANCH LINE CIRCUIT

LAN-149

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

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AV BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006256292

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).

-

AV control unit

-

Harness connector M222

-

Harness connector M119

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.

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 

AV-161, "AV CONTROL UNIT :

Diagnosis Procedure"

.

Is the inspection result normal?

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

AV-212, "Removal and Installation"

.

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.

M210

90

74

Approx. 54 – 66

LAN-150

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

BCM BRANCH LINE CIRCUIT

BCM BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006256293

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-75, "Diagnosis Procedure"

.

Is the inspection result normal?

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

BCS-81, "Removal and Installation"

.

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.

M68

39

40

Approx. 54 – 66

LAN

CGW BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT 1)

LAN-151

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

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CGW BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT 1)

Diagnosis Procedure

INFOID:0000000006256294

1.

CHECK DTC

Check DTC of the CAN gateway with CONSULT-III.
Is U1010 or B2600 indicated?

YES

>> Perform a diagnosis of the indicated DTC.

NO

>> GO TO 2.

2.

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 CAN gateway for damage, bend and loose connection (unit
side and connector side).

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the terminal and connector.

3.

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of CAN gateway.

2.

Check the resistance between the CAN gateway harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 4.

NO

>> Repair the CAN gateway branch line (CAN communication circuit 1). Refer to 

LAN-57, "System

Diagram"

.

4.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the CAN gateway. Refer to 

LAN-116, "Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the CAN gateway. Refer to 

LAN-117, "Removal and Installation"

.

YES (Past error)>>Error was detected in the CAN gateway branch line (CAN communication circuit 1).
NO

>> Repair the power supply and the ground circuit.

CAN gateway harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M125

1

7

Approx. 54 – 66

LAN-152

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

CGW BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT 2)

CGW BRANCH LINE CIRCUIT (CAN COMMUNICATION CIRCUIT 2)

Diagnosis Procedure

INFOID:0000000006256295

1.

CHECK DTC

Check DTC of the CAN gateway with CONSULT-III.
Is U1010 or B2600 indicated?

YES

>> Perform a diagnosis of the indicated DTC.

NO

>> GO TO 2.

2.

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).

-

CAN gateway

-

Harness connector M19

-

Harness connector B2

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the terminal and connector.

3.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the connector of CAN gateway.

2.

Check the continuity between the CAN gateway harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair the CAN gateway branch line (CAN communication circuit 2). Refer to 

LAN-57, "System

Diagram"

.

4.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the CAN gateway. Refer to 

LAN-116, "Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the CAN gateway. Refer to 

LAN-117, "Removal and Installation"

.

YES (Past error)>>Error was detected in the CAN gateway branch line (CAN communication circuit 2).
NO

>> Repair the power supply and the ground circuit.

CAN gateway harness connector

Continuity

Connector No.

Terminal No.

M125

4

6

Existed

10

12

Existed