Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Disconnect the following harness connectors.
- ECM
- Harness connector B54 and B200
- Automatic back door control module

Check the continuity between the harness connector and the automatic back door control module harness connector.

Harness connector		Automatic back door control module harness connector		Continuity
Connector No.	Terminal No.	Connector No.	Terminal No.
B54	1	B55	24	Existed
	2		12	Existed

Is the inspection result normal?

YES

Check CAN system type decision again.

YES

Error was detected in the main line between the driver seat control unit and the automatic back door control module.

Repair the main line between the driver seat control unit and the automatic back door control module.