Diagnosis Procedure

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

1. CHECK LIFTING SWITCH (REAR) 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	14	Ground	Lifting switch (rear)	Operate (down)	0
      				Release	Battery voltage
      	29			Operate (up)	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 LIFTING SWITCH (REAR) 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 sear switch LH connector	Terminal	Continuity
      B202 (A)	14	B208 (B)	2	Yes
      	29		6

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

      Driver seat control unit connector	Terminal	Ground	Continuity
      B202 (A)	14		No
      	29

      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.
   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	14	Ground	Battery voltage
      	29

      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 LIFTING SWITCH (REAR)

   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.