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.

CHECK FUSE AND FUSIBLE LINK

Check that the following fuse and fusible link are not blown.

Terminal no.	Signal name	Fuse and fusible link No.
Terminal no.	Signal name	Cummins 5.0L	VK56VD
25	Brake switch fuse	10 (10A)
131	BCM battery fuse	1 (10A)	1 (10A)
138	Rear door battery	4 (15A)
139	Fusible link battery power	R (50A)	N (50A)
142	Front door battery	3 (15A)

Is the fuse or fusible link blown?

YES

Replace the blown fuse or fusible link after repairing the affected circuit.

GO TO 2 .

CHECK POWER SUPPLY CIRCUIT

Disconnect BCM connectors M18 and M81.

Check voltage between BCM connectors and ground.

BCM		Ground	Voltage (Approx.)
Connector	Terminal
M18	25	(-)	Battery voltage
M81	131
	138
	139
	142

Is the inspection result normal?

YES

GO TO 3 .

Repair or replace harness or connectors.

CHECK GROUND CIRCUIT

Check continuity between BCM connector M81 terminals 134, 143 and ground.

BCM		Ground	Continuity
Connector	Terminal
M81	134	-	Yes
	143

Is the inspection result normal?

YES

Inspection End.

Repair or replace harness or connectors.