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 door switch LH	B21	3	Ground	Courtesy of NISSAN NORTH AMERICA, INC. 7.0 - 8.0 V
      Front door switch RH	B28	3
      Rear door switch LH	B26	3
      Rear door switch RH	B41	3

   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 door switch LH	B21	3	B24	98	Yes
      Front door switch RH	B28			100
      Rear door switch LH	B26			97
      Rear door switch RH	B41			99

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

      Door switch			Ground	Continuity
      Connector		Terminal
      Front door switch LH	B21	3		No
      Front door switch RH	B28
      Rear door switch LH	B26
      Rear door switch RH	B41

   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.

4. CHECK INTERMITTENT INCIDENT
   
   

   Refer to INTERMITTENT INCIDENT .

   Inspection End.