Diagnosis Procedure

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

   (+)			(-)	Signal (Reference value)
   Door switch
   Connector		Terminal
   Driver side	B16	2	Ground	Courtesy of NISSAN MOTOR CO., U.S.A.
   Passenger side	B216	2		Courtesy of NISSAN MOTOR CO., U.S.A.
   Back door	B66	1		Courtesy of NISSAN MOTOR CO., U.S.A.

   Is the inspection result normal? 

   YES-1: Back door: GO TO  3.

   YES-2: Other doors: GO TO  4.

   NO: GO TO 2.

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

   Door switch			BCM		Continuity
   Connector		Terminal	Connector	Terminal
   Driver side	B16	2	M123	150	Existed
   Passenger side	B216			124
   Back door	B66	1	M121	66

3. Check continuity between door switch harness connector and ground.
   CONTINUITY REFERENCE CHART
   
   

   Door switch			Ground	Continuity
   Connector		Terminal
   Driver side	B16	2		Not existed
   Passenger side	B216
   Back door	B66	1

   Is the inspection result normal? 

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

   NO: Repair or replace harness.

Check continuity between back door switch harness connector and ground.

Is the inspection result normal? 

YES: GO TO 4.

NO: Repair or replace harness.

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 5.

NO-1: Replace malfunctioning door switch. Refer to "REMOVAL AND INSTALLATION ".

NO-2: Replace back door switch. Refer to "REMOVAL AND INSTALLATION ".

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END