Diagnosis Procedure

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

1. CHECK RECLINING SENSOR SIGNAL 
   1. Turn ignition switch OFF.
   2. Read voltage signal between driver seat control unit harness connector and ground with oscilloscope.

      Terminals			Condition		Voltage signal
      (+)		(-)
      Driver seat control unit	Terminal
      B202	9	Ground	Seat reclining	Operate
      				Other than above	0 or 5

      Fig 1: Checking Reclining Sensor Signal Voltage Using Oscilloscope

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO  4

      NO: GO TO 2

2. CHECK RECLINING SENSOR CIRCUIT 
   1. Disconnect driver seat control unit and reclining motor LH.
   2. Check continuity between driver seat control unit harness connector and reclining motor LH harness connector.

      Driver seat control unit connector	Terminal	Reclining motor connector	Terminal	Continuity
      B202 (A)	9	B205 (B)	1	Yes
      	31		4

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

      Courtesy of NISSAN NORTH AMERICA, INC.

      Driver seat control unit connector	Terminal	Ground	Continuity
      B202 (A)	9		No
      	31

      Is the inspection result normal? 

      YES: GO TO 3

      NO: Repair or replace harness.

3. CHECK SEAT OPERATION 
   1. Connect driver seat control unit and reclining motor LH connector.
   2. Check seat operation (except reclining operation) with memory function.

      Is the operation normal? 

      YES: Replace reclining motor LH. (Built in power seat frame assembly). Refer to "DISASSEMBLY AND ASSEMBLY ".

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

4. 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.