Infiniti QX56 (Z62). Manual - part 910

LAN

IPDM-E BRANCH LINE CIRCUIT

LAN-217

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

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IPDM-E BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006256388

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).

-

IPDM E/R

-

Harness connector E105

-

Harness connector M77

-

Harness connector M19 (Without ICC system)

-

Harness connector B2 (Without ICC system)

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 IPDM E/R.

2.

Check the resistance between the IPDM E/R harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the IPDM E/R branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the IPDM E/R. Refer to 

PCS-31, "Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the IPDM E/R. Refer to 

PCS-32, "Removal and Installation"

.

YES (Past error)>>Error was detected in the IPDM E/R branch line.
NO

>> Repair the power supply and the ground circuit.

IPDM E/R harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

E13

27

26

Approx. 108 – 132

LAN-218

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

ADP BRANCH LINE CIRCUIT

ADP BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006256389

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).

-

Driver seat control unit

-

Harness connector B460

-

Harness connector B24

-

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 driver seat control unit.

3.

Check the resistance between the driver seat control unit harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 4.

NO

>> Repair the driver seat control unit branch line.

4.

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

ADP-67, "DRIVER SEAT

CONTROL UNIT : Diagnosis Procedure"

.

Is the inspection result normal?

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

ADP-135, "Removal and Installation"

.

YES (Past error)>>Error was detected in the driver seat 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

Driver seat control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

B451

1

17

Approx. 54 – 66

LAN

PSB BRANCH LINE CIRCUIT

LAN-219

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

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PSB BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006256390

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-220

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

E-SUS BRANCH LINE CIRCUIT

E-SUS BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006256391

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