Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CHECK DOOR SWITCH INPUT SIGNAL
   
   
   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 value)
      Door switch
      Connector		Terminal
      Front LH	B71	3	Ground	Courtesy of NISSAN NORTH AMERICA, INC. 7.0 - 8.0 V
      Front RH	B141
      Rear LH	B70
      Rear RH	B142

   Is the inspection result normal?

   YES 

   GO TO STEP 3  .

   NO 

   GO TO STEP 2  .

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

      Door switch			BCM		Continuity
      Connector		Terminal	Connector	Terminal
      Front LH	B71	3	B16	57	Yes
      Front RH	B141			53
      Rear LH	B70			52
      Rear RH	B142			50

   3. Check continuity between door switch harness connector and ground.

      Door switch			Ground	Continuity
      Connector		Terminal
      Front LH	B71	3		No
      Front RH	B141
      Rear LH	B70
      Rear RH	B142

   Is the inspection result normal?

   YES 

   Replace BCM. Refer to REMOVAL AND INSTALLATION .

   NO 

   Repair or replace harness.

3. CHECK DOOR SWITCH
   
   

   Refer to COMPONENT INSPECTION .

   Is the inspection result normal?

   YES 

   GO TO STEP 4  .

   NO 

   Replace malfunctioning door switch. Refer to REMOVAL AND INSTALLATION .

4. CHECK INTERMITTENT INCIDENT
   
   

   Refer to INTERMITTENT INCIDENT .

   Inspection End.