Infiniti QX56 (Z62). Manual - part 913

 

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Infiniti QX56 (Z62). Manual - part 913

 

 

LAN

CAN COMMUNICATION CIRCUIT 1

LAN-229

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

5.

CHECK SYMPTOM

Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced. 

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 1.
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-230

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

CAN COMMUNICATION CIRCUIT 2

CAN COMMUNICATION CIRCUIT 2

Diagnosis Procedure

INFOID:0000000006256401

1.

CONNECTOR INSPECTION

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Disconnect all the unit connectors on CAN communication circuit 2.
NOTE:
For identification of CAN communication circuit 1, CAN communication circuit 2, and ITS communication
circuit, refer to 

LAN-57, "System Diagram"

.

4.

Check terminals and connectors for damage, bend and loose connection.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the data link connector terminals.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check the harness and repair the root cause.

3.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Check the harness and repair the root cause.

4.

CHECK CAN GATEWAY TERMINATION CIRCUIT

1.

Remove the CAN gateway.

2.

Check the resistance between the CAN gateway terminals.

Is the measurement value within the specification?

YES

>> GO TO 5.

NO

>> Replace the CAN gateway.

5.

CHECK SYMPTOM

Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced. 

Inspection result

Reproduced>>GO TO 6.

Data link connector

Continuity

Connector No.

Terminal No.

M4

13

12

Not existed

Data link connector

Ground

Continuity

Connector No.

Terminal No.

M4

13

Not existed

12

Not existed

CAN gateway

Resistance (

)

Terminal No.

4

10

Approx. 108 – 132

6

12

Approx. 108 – 132

LAN

CAN COMMUNICATION CIRCUIT 2

LAN-231

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

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 2.
NOTE:
CAN gateway has two termination circuits. 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-232

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

ITS COMMUNICATION CIRCUIT

ITS COMMUNICATION CIRCUIT

Diagnosis Procedure

INFOID:0000000006256402

1.

CHECK CAN DIAGNOSIS

Check the CAN diagnosis results from CONSULT-III to see that the CAN communication circuit 1 and CAN
communication circuit 2 have no malfunction.
NOTE:
For identification of CAN communication circuit 1, CAN communication circuit 2, and ITS communication cir-
cuit, refer to 

LAN-57, "System Diagram"

.

Are the CAN communication 1 and CAN communication 2 circuits normal?

YES

>> GO TO 2.

NO

>> Check and repair CAN communication circuit 1 and/or CAN communication circuit 2.

2.

CONNECTOR INSPECTION

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

-

Harness connector B63

-

Harness connector B239

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the terminal and connector.

3.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the following harness connectors.

-

ADAS control unit

-

ICC sensor

2.

Check the continuity between the ADAS control unit harness connector and the ICC sensor harness con-
nector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair the ADAS control unit branch line. (ITS communication circuit). Refer to 

LAN-57, "System

Diagram"

.

4.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

1.

Disconnect the following harness connectors.

-

Side radar RH

-

Side radar LH

-

Lane camera unit

-

Accelerator pedal actuator

2.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Check the harness and repair the root cause.

ADAS control unit harness connector

ICC sensor harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

B61

7

E65

3

Existed

8

6

Existed

ADAS control unit harness connector

Continuity

Connector No.

Terminal No.

B61

7

8

Not existed

 

 

 

 

 

 

 

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