Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK RECLINING SWITCH SIGNAL 
   1. Turn ignition switch OFF.
   2. Check voltage between driver seat control unit harness connector and ground.

      Driver seat control unit connector	Terminals		Condition		Voltage (V) (Approx.)
      	(+)	(-)
      B202	12	Ground	Reclining switch	Operate (backward)	0
      				Release	Battery voltage
      	27			Operate (forward)	0
      				Release	Battery voltage

      Fig 1: Checking Reclining Switch Signal Voltage

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO  5

      NO: GO TO 2

2. CHECK RECLINING SWITCH CIRCUIT 
   1. Disconnect driver seat control unit and power seat switch LH.
   2. Check continuity between driver seat control unit harness connector and power seat switch LH harness connector.

      Driver seat control unit connector	Terminal	Power seat switch LH connector	Terminal	Continuity
      B202 (A)	12	B208 (B)	3	Yes
      	27		4

   3. Check continuity between driver seat control unit harness connector and ground.
      Fig 2: Checking Reclining Switch Circuit Continuity

      Courtesy of NISSAN NORTH AMERICA, INC.

      Driver seat control unit connector	Terminal	Ground	Continuity
      B202 (A)	12		No
      	27

      Is the inspection result normal? 

      YES: GO TO 3

      NO: Repair or replace harness.

3. CHECK DRIVER SEAT CONTROL UNIT OUTPUT 
   1. Connect the driver seat control unit.
   2. Turn ignition switch OFF.
   3. Check voltage between driver seat control unit harness connector and ground.

      Driver seat control unit connector	Terminals		Voltage (V) (Approx.)
      	(+)	(-)
      B202	12	Ground	Battery voltage
      	27

      Fig 3: Checking Driver Seat Control Unit Output Voltage

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 4

      NO: Replace driver seat control unit. Refer to "REMOVAL AND INSTALLATION ".

4. CHECK RECLINING SWITCH 

   Refer to "COMPONENT INSPECTION ".

   Is the inspection result normal? 

   YES: GO TO 5

   NO: Replace power seat switch LH. Refer to "DISASSEMBLY AND ASSEMBLY ".

5. CHECK INTERMITTENT INCIDENT 

   Refer to "INTERMITTENT INCIDENT ".

   Is the inspection result normal? 

   YES: Replace driver seat control unit. Refer to "REMOVAL AND INSTALLATION ".

   NO: Repair or replace the malfunctioning part.