DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK INPUT 1 - 5 CIRCUIT FOR OPEN

Turn ignition switch OFF.
Disconnect BCM, combination switch, lighting switch and front fog lamps switch connectors.

Check continuity between BCM connector and combination switch connector.

Signal	BCM		Combination switch		Continuity
Signal	Connector	Terminal	Connector	Terminal	Continuity
Input 1	M18	36	M28	11	Yes
Input 2		35		9
Input 3		34		7
Input 4		33		10
Input 5		32		13

Check continuity between BCM connector and lighting switch connector.

Signal	BCM		Lighting switch		Continuity
	Connector	Terminal	Connector	Terminal
Input 2	M18	35	M34	2	Yes
Input 3		34		3
Input 4		33		4

Check continuity between BCM connector and front fog lamps switch connector.

Signal	BCM		Front fog lamps switch		Continuity
Signal	Connector	Terminal	Connector	Terminal	Continuity
Input 5	M18	32	M10	1	Yes

Is the inspection result normal?

YES

GO TO 2.

Repair harnesses or connectors.

CHECK INPUT 1 - 5 CIRCUIT FOR SHORT

Check for continuity between BCM connector and ground.

Signal	BCM		Ground	Continuity
	Connector	Terminal
Input 1	M18	36		No
Input 2		35
Input 3		34
Input 4		33
Input 5		32

Is the inspection result normal?

YES

GO TO 3.

Repair harnesses or connectors.

CHECK BCM OUTPUT VOLTAGE

Connect BCM connector.

Check voltage between BCM connector and ground.

Signal	Terminals			Voltage (Approx.)
	(+)		(-)
	BCM		Ground
	Connector	Terminal
Input 1	M18	36		Refer to Reference Value .
Input 2		35
Input 3		34
Input 4		33
Input 5		32

Is the inspection result normal?

YES

Replace malfunctioning switch.

Replace BCM. Refer to Removal and Installation .