Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect malfunctioning door switch connector.
3. Check signal between malfunctioning door switch harness connector and ground with oscilloscope.
   SIGNAL REFERENCE
   
   

   (+)			(-)	Signal (Reference value)
   Door switch
   Connector		Terminal
   Front LH	B16	2	Ground	Courtesy of NISSAN MOTOR CO., U.S.A.
   Front RH	B216			Courtesy of NISSAN MOTOR CO., U.S.A.
   Rear LH	B23			Courtesy of NISSAN MOTOR CO., U.S.A.
   Rear RH	B223			Courtesy of NISSAN MOTOR CO., U.S.A.

   Is the inspection result normal? 

   YES: GO TO  3.

   NO: GO TO 2.

1. Disconnect BCM connector.
2. Check continuity between BCM harness connector and door switch harness connector.
   CONTINUITY REFERENCE
   
   

   BCM		Door switch		Continuity
   Connector	Terminal	Connector	Terminal
   M121	47	B16 (Front LH)	2	Existed
   	45	B216 (Front RH)
   	48	B23 (Rear LH)
   	46	B223 (Rear RH)

3. Check continuity between BCM harness connector and ground.
   CONTINUITY REFERENCE
   
   

   BCM		Ground	Continuity
   Connector	Terminal
   M121	47		Not existed
   	45
   	48
   	46

   Is the inspection result normal? 

   YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

   NO: Repair or replace harness.

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 4.

NO: Replace malfunctioning door switch.

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END