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 SOS SWITCH LED SIGNAL

Turn ignition switch ACC.

Check the voltage between TCU connector M197 and ground.

TCU

Ground

Voltage

(Approx.)

Connector

Terminal

M197

Battery Voltage

Is the inspection result normal?

YES

GO TO 2 .

Replace TCU. Refer to Removal and Installation .

CHECK SOS SWITCH LED SIGNAL CIRCUIT FOR OPEN

Turn ignition switch OFF.
Disconnect TCU connector M197 and telematics switch connector.

Check the continuity between TCU connector M197 and telematics switch connector R15.

TCU		Telematics switch		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M197	5	R15	1	Yes

Is the inspection result normal?

YES

GO TO 3 .

Repair or replace harness or connectors.

CHECK SOS SWITCH LED SIGNAL CIRCUIT FOR SHORT

Check the continuity between TCU connector M197 and ground.

TCU		Ground	Continuity
Connector	Terminal
M197	5		Yes

Is the inspection result normal?

YES

Replace telematics switch. Refer to Removal and Installation .

Repair or replace harness or connectors.