Infiniti QX56 (Z62). Manual - part 877

LAN

PSB BRANCH LINE CIRCUIT

LAN-85

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

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PSB BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006220561

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).

-

Pre-crash seat belt control unit (driver side)

-

CAN gateway

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

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 3.

NO

>> Check the harness and repair the root cause (CAN communication circuit 2). Refer to 

LAN-57,

"System Diagram"

.

3.

CHECK HARNESS FOR OPEN CIRCUIT

1.

Connect the connector of CAN gateway.

2.

Disconnect the connector of pre-crash seat belt control unit (driver side).

3.

Check the resistance between the pre-crash seat belt control unit (driver side) harness connector termi-
nals.

Is the measurement value within the specification?

YES

>> GO TO 4.

NO

>> Repair the pre-crash seat belt control unit (driver side) branch line.

4.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the pre-crash seat belt control unit (driver side). Refer to

SBC-52, "Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the seat belt pre-tensioner retractor (LH side). Refer to 

SB-6, "SEAT BELT

RETRACTOR : Removal and Installation"

.

YES (Past error)>>Error was detected in the pre-crash seat belt control unit (driver side) branch line.
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

Pre-crash seat belt control unit (driver side) harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

B9

14

4

Approx. 54 – 66

LAN-86

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

E-SUS BRANCH LINE CIRCUIT

E-SUS BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006220562

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).

-

Air levelizer control module

-

CAN gateway (With ICC system)

Is the inspection result normal?

YES (With ICC system)>>GO TO 2.
YES (Without ICC system)>>GO TO 3.
NO

>> Repair the terminal and connector.

2.

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 3.

NO

>> Check the harness and repair the root cause (CAN communication circuit 2). Refer to 

LAN-57,

"System Diagram"

.

3.

CHECK HARNESS FOR OPEN CIRCUIT

1.

Connect the connector of CAN gateway. (With ICC system)

2.

Disconnect the connector of air levelizer control module.

3.

Check the resistance between the air levelizer control module harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 4.

NO

>> Repair the air levelizer control module branch line.

4.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the air levelizer control module. Refer to 

SCS-89,

"Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the air levelizer control module. Refer to 

SCS-94, "Removal and Installation"

.

YES (Past error)>>Error was detected in the air levelizer control module branch line.
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

Air levelizer control module harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

B84

16

7

Approx. 54 – 66

LAN

ICC BRANCH LINE CIRCUIT

LAN-87

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

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ICC BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006220563

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).

-

ADAS control unit

-

CAN gateway

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

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 3.

NO

>> Check the harness and repair the root cause (CAN communication circuit 2). Refer to 

LAN-57,

"System Diagram"

.

3.

CHECK HARNESS FOR OPEN CIRCUIT

1.

Connect the connector of CAN gateway.

2.

Disconnect the connector of ADAS control unit.

3.

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

Is the measurement value within the specification?

YES

>> GO TO 4.

NO

>> Repair the ADAS control unit branch line.

4.

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

DAS-62, "Diagnosis Proce-

dure"

.

Is the inspection result normal?

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

DAS-63, "Removal and Installation"

.

YES (Past error)>>Error was detected in the ADAS control unit branch line.
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

ADAS control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

B61

14

15

Approx. 54 – 66

LAN-88

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

PWBD BRANCH LINE CIRCUIT

PWBD BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006220564

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).

-

Automatic back door control module

-

CAN gateway (With ICC system)

Is the inspection result normal?

YES (With ICC system)>>GO TO 2.
YES (Without ICC system)>>GO TO 3.
NO

>> Repair the terminal and connector.

2.

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 3.

NO

>> Check the harness and repair the root cause (CAN communication circuit 2). Refer to 

LAN-57,

"System Diagram"

.

3.

CHECK HARNESS FOR OPEN CIRCUIT

1.

Connect the connector of CAN gateway. (With ICC system)

2.

Disconnect the connector of automatic back door control module.

3.

Check the resistance between the automatic back door control module harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 4.

NO

>> Repair the automatic back door control module branch line.

4.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the automatic back door control module. Refer to 

DLK-116,

"AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure"

. 

Is the inspection result normal?

YES (Present error)>>Replace the automatic back door control module. Refer to 

DLK-262, "Removal and

Installation"

.

YES (Past error)>>Error was detected in the automatic back door control module branch line.
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

Automatic back door control module harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

B26

7

6

Approx. 54 – 66