Diagnosis Procedure

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

CHECK USB CIRCUITS CONTINUITY

Turn ignition switch OFF.
Disconnect TCU connector M193 and AV control unit connector M158.

Check continuity between TCU connector M193 and AV control unit connector M158.

TCU		AV control unit		Continuity
Connector	Terminal	Connector	Terminal
M193	41	M158	82	Yes
	43		84
	44		85
	45		86
	46		87

Check the continuity between TCU connector M193 and ground.

TCU		Ground	Continuity
Connector	Terminal
M193	41	-	No
	44

Is the inspection result normal?

YES

Replace TCU. Refer to Removal and Installation .

Repair or replace harness or connectors.