Diagnosis Procedure

Detects door open/close condition.

1. CHECK DOOR SWITCH INPUT SIGNAL 
   1. Ignition switch OFF.
   2. Check signal between BCM connector and ground with oscilloscope.

      (+)		(-)	Door condition		Voltage (Approx.)
      BCM
      Connector	Terminal
      B71	57	Ground	Front door switch LH	OPEN	0
      				CLOSE	Courtesy of NISSAN NORTH AMERICA, INC.
      	53		Front door switch RH	OPEN	0
      				CLOSE	Courtesy of NISSAN NORTH AMERICA, INC.
      	50		Rear door switch RH	OPEN	0
      				CLOSE	Courtesy of NISSAN NORTH AMERICA, INC.
      	52		Rear door switch LH	OPEN	0
      				CLOSE	Courtesy of NISSAN NORTH AMERICA, INC.

   Is the inspection result normal?

   YES

   GO TO 4.

   NO

   GO TO 2.

2. CHECK DOOR SWITCH CIRCUIT 
   1. Disconnect BCM connector and door switch connector.
   2. Check continuity between BCM connector and door switch connector.

      BCM		Door switch		Continuity
      Connector	Terminal	Connector	Terminal
      B71	57	Front door switch LH	3	Yes
      	53	Front door switch RH
      	50	Rear door switch RH
      	52	Rear door switch LH

   3. Check continuity between BCM connector and ground.

      BCM		Ground	Continuity
      Connector	Terminal
      B71	57		No
      	53
      	50
      	52

   Is the inspection result normal?

   YES

   GO TO 3.

   NO

   Repair or replace harness between BCM and door switch.

3. CHECK DOOR SWITCH 

   Refer to Component Inspection .

   Is the inspection result normal?

   YES

   GO TO 4.

   NO

   Replace malfunctioning door switch. Refer to DOOR SWITCH : Removal & Installation .

4. CHECK INTERMITTENT INCIDENT 

   Refer to Inspection .

   Inspection End.