Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DOOR SWITCH INPUT SIGNAL

Turn ignition switch OFF.
Check signal between BCM connector and ground with oscilloscope.

Fig 1: Checking Signal Between BCM Connector And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.NISSAN MOTOR CO., U.S.A.NISSAN MOTOR CO., U.S.A.

VOLTAGE SPECIFICATION

Terminals			Door condition		Voltage (V) (Approx.)
(+)		(-)
BCM connector	Terminal	(-)
A: M18	58	Ground	Driver side	OPEN	0
	58		Driver side	CLOSE	Courtesy of NISSAN MOTOR CO., U.S.A.
	32		Passenger side	OPEN	0
	32		Passenger side	CLOSE	Courtesy of NISSAN MOTOR CO., U.S.A.

Is the inspection result normal?

YES: GO TO 4

NO: GO TO 2

CHECK DOOR SWITCH CIRCUIT

Disconnect BCM connector.

Check continuity between BCM connector and door switch connector.

CONTINUITY SPECIFICATION

BCM connector	Terminal	Door switch connector	Terminal	Continuity
M18	58	B8 (Driver side)	2	Yes
M18	32	B108 (Passenger side)	2	Yes

Check continuity between BCM connector and ground.

CONTINUITY SPECIFICATION

BCM connector	Terminal	Ground	Continuity
M18	58		No
	32

Fig 2: Checking Continuity Between BCM Connector And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

Is the inspection result normal?

YES: GO TO 3

NO: Repair or replace harness between BCM and door switch.

CHECK DOOR SWITCH
Refer to "COMPONENT INSPECTION ".

Is the inspection result normal?

YES: GO TO 4

NO: Replace malfunctioning door switch.
CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".

Inspection End.

CHECK DOOR SWITCH INPUT SIGNAL

Turn ignition switch OFF.
Check signal between BCM connector and ground with oscilloscope.

Fig 1: Checking Signal Between BCM Connector And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.NISSAN MOTOR CO., U.S.A.NISSAN MOTOR CO., U.S.A.NISSAN MOTOR CO., U.S.A.NISSAN MOTOR CO., U.S.A.

VOLTAGE SPECIFICATION

Terminals			Door condition		Voltage (V) (Approx.)
(+)		(-)
BCM connector	Terminal	(-)
A: M18	58	Ground	Driver side	OPEN	0
	58		Driver side	CLOSE	Courtesy of NISSAN MOTOR CO., U.S.A.
	32		Passenger side	OPEN	0
	32		Passenger side	CLOSE	Courtesy of NISSAN MOTOR CO., U.S.A.
B: M21	148		Rear RH	OPEN	0
	148		Rear RH	CLOSE	Courtesy of NISSAN MOTOR CO., U.S.A.
	149		Rear LH	OPEN	0
	149		Rear LH	CLOSE	Courtesy of NISSAN MOTOR CO., U.S.A.

Is the inspection result normal?

YES: GO TO 4

NO: GO TO 2

CHECK DOOR SWITCH CIRCUIT

Disconnect BCM connector.

Check continuity between BCM connector and door switch connector.

CONTINUITY SPECIFICATION

BCM connector	Terminal	Door switch connector	Terminal	Continuity
A: M18	58	C: B8 (Driver side)	2	Yes
A: M18	32	C: B108 (Passenger side)
B: M21	148	C: B116 (Rear RH)
B: M21	149	C: B18 (Rear LH)

Check continuity between BCM connector and ground.

Fig 2: Checking Continuity Between BCM Connector And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

CONTINUITY SPECIFICATION

BCM connector	Terminal	Ground	Continuity
A: M18	58		No
	32
B: M21	148
	149

Is the inspection result normal?

YES: GO TO 3

NO: Repair or replace harness between BCM and door switch.

CHECK DOOR SWITCH
Refer to "COMPONENT INSPECTION ".

Is the inspection result normal?

YES: GO TO 4

NO: Replace malfunctioning door switch.
CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".

Inspection End.