Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Infiniti QX60. 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 M40
  - Harness connector B69
Is the inspection result normal?

YES

GO TO 2.

NO

Repair the terminal and connector.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Disconnect the harness connectors M40 and B69.

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

Data link connector		Harness connector		Continuity
Connector No.	Terminal No.	Connector No.	Terminal No.
M22	13	M40	89A	Existed
	12		90A	Existed

Is the inspection result normal?

YES

GO TO 3.

Repair the main line between the data link connector and the harness connector M40.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Disconnect the harness connectors B54 and B200.

Check the continuity between the harness connectors.

Harness connector		Harness connector		Continuity
Connector No.	Terminal No.	Connector No.	Terminal No.
B69	89A	B54	1	Existed
	90A		2	Existed

Is the inspection result normal?

YES

Check CAN system type decision again.

YES

Error was detected in the main line between the data link connector and the driver seat control unit.

Repair the main line between the harness connectors B69 and driver seat control unit.