Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

CHECK INTERIOR ROOM LAMP CONTROL OUTPUT

WITH CONSULT

Turn ignition switch ON.
Select "INT LAMP" of BCM (INT LAMP) active test item.

While operating the test item, check voltage between BCM harness connector M20 terminal 63 and ground.

(+)		(-)	INT LAMP	Voltage
Connector	Terminal	(-)	INT LAMP	Voltage
M20	63	Ground	ON	0V
M20	63	Ground	OFF	Battery voltage

Fig 1: Checking Voltage Between BCM Connector M20 Terminal 63 And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES: Interior room lamp control circuit is operating normally.

Fixed ON>>GO TO 3

Fixed OFF>> GO TO 2

CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT

Turn ignition switch OFF.
Disconnect BCM connector M20, personal lamp 2nd row connector (with personal lamp 2nd row) or room lamp 2nd row connector (without personal lamp 2nd row) and front room/map lamp connector.

Check continuity between BCM connector M20 (A) terminal 63 and interior room lamp connectors.

BCM		Interior room lamp			Continuity
connector	Terminal	Component	Connector	Terminal	Continuity
M20 (A)	63	Room lamp 2nd row (without personal lamp 2nd row)	R12 (B)	1	YES
		Personal lamp 2nd row (with personal lamp 2nd row)	R10 (C)	2
		Front room/map lamp	R9 (D)	2

Fig 2: Checking Continuity Between BCM Connector M20 Terminal 63 And Interior Room Lamp Connectors R12, R10, R9 Terminals

Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES: Check interior room lamps for an open. If OK, replace BCM. Refer to "REMOVAL AND INSTALLATION ". If NG, replace interior room lamp. Refer to "REMOVAL AND INSTALLATION ".

NO: Repair the harness or connectors.

CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT

Turn ignition switch OFF.
Disconnect BCM connector M20, personal lamps 2nd row connector (with personal lamp 2nd row) or room lamp 2nd row connector (without personal lamp 2nd row).

Check continuity between BCM connector M20 terminal 63 and ground.

Connector	Terminal	-	Continuity
M20	63	Ground	No

Fig 3: Checking Continuity Between BCM Connector M20 Terminal 63 And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES: Check interior room lamps for a short circuit. If OK, replace BCM. Refer to "REMOVAL AND INSTALLATION ". If NG, replace interior room lamp. Refer to "REMOVAL AND INSTALLATION ".

NO: Repair the harness or connectors.