Diagnosis Procedure

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

1. CHECK RECLINING SWITCH SIGNAL
   1. Turn ignition switch ON.
   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 (forward)	0
      				Release	Battery voltage
      	27			Operate (backward)	0
      				Release	Battery voltage

      Fig 1: Checking Voltage Between Driver Seat Control Unit Harness Connector B202 And Ground

      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. Turn ignition switch OFF.
   2. Disconnect driver seat control unit and power seat switch LH.
   3. 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

   4. Check continuity between driver seat control unit harness connector and ground.

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

      Fig 2: Checking Continuity Between Driver Seat Control Unit Harness Connector B202 And Power Seat Switch LH Harness Connector B208

      Courtesy of NISSAN NORTH AMERICA, INC.

      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 connector.
   2. Turn ignition switch ON.
   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 Voltage Between Driver Seat Control Unit Harness Connector B202 And Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 4

      NO: Replace driver seat control unit. Refer to "EXPLODED VIEW ".

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 "EXPLODED VIEW ".

5. CHECK INTERMITTENT INCIDENT

   Refer to "INTERMITTENT INCIDENT ".

   Is the inspection result normal? 

   YES: Replace driver seat control unit. Refer to "EXPLODED VIEW ".

   NO: Repair or replace the malfunctioning part. Refer to "EXPLODED VIEW ".