Infiniti QX56 (Z62). Manual - part 890

LAN

CAN COMMUNICATION CIRCUIT

LAN-137

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 1)]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

Inspection result

Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is

detected.

6.

CHECK UNIT REPRODUCTION

Perform the reproduction test as per the following procedure for each unit.
1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Disconnect one of the unit connectors of CAN communication circuit.
NOTE:
ECM and IPDM E/R have a termination circuit. Check other units first.

4.

Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom
(Results from interview with customer)” are reproduced. 
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms. 

Inspection result

Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.

LAN-138

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

MAIN LINE BETWEEN ABS AND DLC CIRCUIT

DTC/CIRCUIT DIAGNOSIS

MAIN LINE BETWEEN ABS AND DLC CIRCUIT

Diagnosis Procedure

INFOID:0000000006256279

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 (connector side
and harness side).

-

Harness connector E107

-

Harness connector M82

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the following harness connectors.

-

ABS actuator and electric unit (control unit)

-

Harness connectors E107 and M82

2.

Check the continuity between the ABS actuator and electric unit (control unit) harness connector and the
harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the main line between the ABS actuator and electric unit (control unit) and the harness

connector E107.

3.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Check the continuity between the harness connector and the data link connector.

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the ABS actuator and electric unit (control

unit) and the data link connector. 

NO

>> Repair the main line between the harness connector M82 and the data link connector.

ABS actuator and electric unit (control unit)

harness connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

E36

41

E107

1

Existed

27

6

Existed

Harness connector

Data link connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M82

1

M4

6

Existed

6

14

Existed

LAN

MAIN LINE BETWEEN ADP AND PWBD CIRCUIT

LAN-139

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

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MAIN LINE BETWEEN ADP AND PWBD CIRCUIT

Diagnosis Procedure

INFOID:0000000006256282

1.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Disconnect the following harness connectors.

-

CAN gateway

-

Harness connectors B460 and B24

-

Automatic back door control module

4.

Check the continuity between the harness connector and the automatic back door control module harness
connector.

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the driver seat control unit and the automatic

back door control module. 

NO

>> Repair the main line between the harness connector B24 and the automatic back door control

module.

Harness connector

Automatic back door control module

harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

B24

13

B26

7

Existed

12

6

Existed

LAN-140

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 2)]

MAIN LINE BETWEEN RDR-R AND RDR-L CIRCUIT

MAIN LINE BETWEEN RDR-R AND RDR-L CIRCUIT

Diagnosis Procedure

INFOID:0000000006256283

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 (connector side
and harness side).

-

Harness connector B239

-

Harness connector B63

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the following harness connectors.

-

Side radar RH

-

Harness connectors B239 and B63

2.

Check the continuity between the side radar RH harness connector and the harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the main line between the side radar RH and the harness connector B239.

3.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the connector of side radar LH.

2.

Check the continuity between the harness connector and the side radar LH harness connector.

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the side radar RH and the side radar LH. 
NO

>> Repair the main line between the harness connector B63 and the side radar LH.

Side radar RH harness connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

B243

4

B239

7

Existed

3

3

Existed

Harness connector

Side radar LH harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

B63

7

B74

4

Existed

3

3

Existed