Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

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 B69
  - Harness connector M40
Is the inspection result normal?

YES

GO TO STEP 2 .

NO

Repair the terminal and connector.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Disconnect the following harness connectors.
- Differential lock control unit
- Harness connector B69 and M40

Check the continuity between the differential lock control unit harness connector and the harness connector.

Differential lock control unit harness connector		Harness connector		Continuity
Connector No.	Terminal No.	Connector No.	Terminal No.
B77	8	B69	42J	Existed
	16		32J	Existed

Is the inspection result normal?

YES

GO TO STEP 3 .

Repair the main line between the differential lock control unit and the harness connector B69.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Disconnect the connector of sonar control unit.

Check the continuity between the harness connector and the sonar control unit harness connector.

Harness connector		Sonar control unit harness connector		Continuity
Connector No.	Terminal No.	Connector No.	Terminal No.
M40	42J	M114	5	Existed
	32J		6	Existed

Is the inspection result normal?

YES

Check CAN system type decision again.

YES

Error was detected in the main line between the differential lock control unit and the sonar control unit.

Repair the main line between the harness connector M40 and the sonar control unit.