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 TELEMATICS ANTENNA
Visually check telematics antenna and antenna feeder. Refer to Removal and Installation .

Is the inspection result normal?

YES

GO TO 2 .

NO

Repair malfunctioning parts.

CHECK TCU VOLTAGE

Disconnect TCU harness connector M158.
Turn ignition switch ON.

Check voltage between TCU connector M158 and ground.

TCU

Ground

Voltage

(Approx.)

Connector

Terminal

M158

47

2.8 V

Is the check result normal?

YES

Replace telematics antenna. Refer to Removal and Installation .

NO

Replace TCU. Refer to Removal and Installation .