CAN

ITS COMMUNICATION CIRCUIT

Diagnosis Procedure


1. CHECK CAN DIAGNOSIS

Check the CAN diagnosis results from CONSULT to see that the CAN communication circuit 1 and CAN communication circuit 2 have no malfunction.
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 terminals and connectors of the ADAS control unit for damage, bend and loose connection (unit side and connector side).
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 connector.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair the ADAS control unit branch line. (ITS communication circuit side).

4. CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

1.Disconnect the following harness connectors.
-Side radar RH
-Side radar LH
-Around view monitor control unit
-Lane camera unit
-Sonar control 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.

5. CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the ADAS control unit harness connector and the ground.
Revision: March 20122013 Infiniti JX





Is the inspection result normal?
YES- GO TO 6.
NO- Check the harness and repair the root cause.

6. CHECK TERMINATION CIRCUIT

1.Remove the ADAS control unit and the ICC sensor.
2.Check the resistance between the ADAS control unit terminals.





3.Check the resistance between the ICC sensor terminals.





Is the inspection result normal?
YES- GO TO 7.
NO- Replace the ADAS control unit and/or the ICC sensor.

7. 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 8.
Non-reproduced-Start the diagnosis again. Follow the trouble diagnosis procedure when past error is detected.

8. 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 ITS communication circuit.
NOTE:
ADAS control unit and ICC sensor 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.
Revision: March 20122013 Infiniti JX