Infiniti QX56 (Z62). Manual - part 906

LAN

MAIN LINE BETWEEN LANE AND APA CIRCUIT

LAN-201

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

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MAIN LINE BETWEEN LANE AND APA CIRCUIT

Diagnosis Procedure

INFOID:0000000006256372

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 R1

-

Harness connector M23

-

Harness connector M77

-

Harness connector E105

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the harness connectors R1 and M23.

2.

Check the continuity between the harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the main line between the lane camera unit and the harness connector R1.

3.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the harness connectors M77 and E105.

2.

Check the continuity between the harness connectors.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair the main line between the harness connectors M23 and M77.

4.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the connector of accelerator pedal actuator.

2.

Check the continuity between the harness connector and the accelerator pedal actuator harness connec-
tor.

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 lane camera unit and the accelerator

pedal actuator. 

NO

>> Repair the main line between the harness connector E105 and the accelerator pedal actuator.

Connector No.

Terminal No.

Continuity

R1

26

29

Existed

23

28

Existed

Harness connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M23

29

M77

22

Existed

28

23

Existed

Harness connector

Accelerator pedal actuator harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

E105

22

E66

5

Existed

23

4

Existed

LAN-202

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

ECM BRANCH LINE CIRCUIT

ECM BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006256373

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 ECM 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 ECM.

2.

Check the resistance between the ECM harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the ECM branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ECM. Refer to 

EC-168, "Diagnosis Procedure"

.

Is the inspection result normal?

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

EC-535, "Removal and Installation"

.

YES (Past error)>>Error was detected in the ECM branch line.
NO

>> Repair the power supply and the ground circuit.

ECM harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

E80

146

151

Approx. 108 – 132

LAN

4WD BRANCH LINE CIRCUIT

LAN-203

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

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4WD BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006256374

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 transfer control unit 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 transfer control unit.

2.

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

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the transfer control unit branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

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

DLN-93, "Diagnosis Proce-

dure"

.

Is the inspection result normal?

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

DLN-107, "Removal and Installation"

.

YES (Past error)>>Error was detected in the transfer control unit branch line.
NO

>> Repair the power supply and the ground circuit.

Transfer control unit harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

E59

12

13

Approx. 54 – 66

LAN-204

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

ABS BRANCH LINE CIRCUIT

ABS BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000006256375

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 ABS actuator and electric unit (control unit) 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 ABS actuator and electric unit (control unit).

2.

Check the resistance between the ABS actuator and electric unit (control unit) harness connector termi-
nals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the ABS actuator and electric unit (control unit) branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to

BRC-113, "Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the ABS actuator and electric unit (control unit). Refer to 

BRC-137, "Removal

and Installation"

.

YES (Past error)>>Error was detected in the ABS actuator and electric unit (control unit) branch line.
NO

>> Repair the power supply and the ground circuit.

ABS actuator and electric unit (control unit) harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

E36

41

27

Approx. 54 – 66