Nissan Murano: Dtc/circuit Diagnosis / Vehicle Can Communication Circuit

Diagnosis Procedure

CONNECTOR INSPECTION

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Disconnect all the unit connectors on Nissan Murano vehicle CAN communication system.

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

Is the inspection result normal?

GO TO 2

Repair the terminal and connector.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Check the continuity between the 3CH CAN gateway harness connector terminals and power steering control module harness connector terminals.

Is the inspection result normal?

GO TO 3

Check the harness and repair the root cause.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the 3CH CAN gateway harness connector terminals.

Is the inspection result normal?

GO TO 4.

Check the harness and repair the root cause.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the 3CH CAN gateway harness connector terminal and the ground.

Is the inspection result normal?

GO TO 5.

Check the harness and repair the root cause.

CHECK ECM AND IPDM E/R TERMINATION CIRCUIT

1. Remove the ECM and the BCM.

2. Check the resistance between the ECM terminals.

   ECM		Resistance (Ω)
   Terminal No.
   124	123	Approx. 108 – 132

3. Check the resistance between the BCM terminals.

   BCM		Resistance (Ω)
   Terminal No.
   60	59	Approx. 108 – 132

Is the measurement value within the specification?

GO TO 6.

Replace the ECM and/or the BCM.

CHECK SYMPTOM

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

Inspection result

GO TO 7.

Start the diagnosis again. Follow the trouble diagnosis procedure when past error is detected.

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 Nissan Murano vehicle CAN communication system.

   NOTE:

   ECM and BCM 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

Connect the connector. Check other units as per the above procedure.

Replace the unit whose connector was disconnected.