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 ECALL SW FOR SHORT CIRCUIT

Turn ignition switch OFF.
Disconnect TCU connector M173 and telematics switch connector R21.

Check the continuity between TCU connector M173 and ground.

TCU		Ground	Continuity
Connector	Terminal
M173	37	-	No

Is the inspection result normal?

YES

GO TO 2.

Repair or replace harness or connectors.

CHECK TELEMATICS SWITCH

Check continuity between telematics switch terminals.

Telematics switch connector R21		Condition	Continuity
Terminal	Terminal
3	7	Switch pressed	Yes
		Switch released	No

Is the inspection result normal?

YES

Replace TCU. Refer to Removal and Installation .

Replace telematics switch. Refer to Removal and Installation .