Infiniti QX56 (Z62). Manual - part 896

LAN

E-SUS BRANCH LINE CIRCUIT

LAN-161

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

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E-SUS BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006256304

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-162

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

ICC BRANCH LINE CIRCUIT

ICC BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006256305

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

PWBD BRANCH LINE CIRCUIT

LAN-163

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

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PWBD BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006256306

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

LAN-164

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

RDR-R BRANCH LINE CIRCUIT

RDR-R BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006256307

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 side radar RH 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 RIGHT/LEFT SWITCHING SIGNAL CIRCUIT

Check the right/left switching signal circuit of the side radar RH. Refer to 

DAS-514, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the root cause.

3.

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of side radar RH.

2.

Check the resistance between the side radar RH harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 4.

NO

>> Repair the side radar RH branch line.

4.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the side radar RH. Refer to 

DAS-513, "SIDE RADAR RH :

Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the side radar RH. Refer to 

DAS-523, "Removal and Installation"

.

YES (Past error)>>Error was detected in the side radar RH branch line.
NO

>> Repair the power supply and the ground circuit.

Side radar RH harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

B243

4

3

Approx. 54 – 66