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.

Regarding Wiring Diagram information, refer to the appropriate Wiring Diagram .

CHECK USB CIRCUITS CONTINUITY

Turn ignition switch OFF.
Disconnect TCU connector M156 and AV control unit connector M152.

Check continuity between TCU connector M156 and AV control unit connector M152.

TCU		AV control unit		Continuity
Connector	Terminal	Connector	Terminal
M156	41	M152	68	Yes
	43		70
	44		71
	45		72
	46		73

Check the continuity between TCU connector M156 and ground.

TCU		Ground	Continuity
Connector	Terminal
M156	41	-	No
	44

Is the inspection result normal?

YES

Replace TCU. Refer to Removal and Installation .

Repair or replace harness or connectors.