Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM - JAPAN PRODUCTION , or WIRING DIAGRAM - USA PRODUCTION .

1. CHECK LIFTING SENSOR (REAR) SIGNAL
   
   
   1. Turn ignition switch ON.
   2. Read voltage signal between driver seat control unit harness connector and ground with oscilloscope.

      (+)		(-)	Condition		Voltage signal
      Driver seat control unit
      Connector	Terminal
      B213	20	Ground	Seat lifting (rear)	Operate	Courtesy of NISSAN NORTH AMERICA, INC.
      				Other than above	0 or 5

   Is the inspection result normal?

   YES 

   Replace driver seat control unit. Refer to REMOVAL AND INSTALLATION .

   NO 

   GO TO STEP 2  .

2. CHECK LIFTING SENSOR (REAR) CIRCUIT
   
   
   1. Turn ignition switch OFF.
   2. Disconnect driver seat control unit and lifting motor LH (rear).
   3. Check the continuity between driver seat control unit harness connector and lifting motor LH (rear) harness connector.

      Driver seat control unit		Lifting motor LH (rear)		Continuity
      Connector	Terminal	Connector	Terminal
      B213	20	B218	2	Yes

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

      Driver seat control unit		Ground	Continuity
      Connector	Terminal
      B213	20		No

   Is the inspection result normal?

   YES 

   GO TO STEP 3. 

   NO 

   Repair or replace harness.

3. CHECK LIFTING SENSOR (REAR) POWER SUPPLY
   
   
   1. Connect driver seat control unit.
   2. Turn ignition switch ON.
   3. Check the voltage between lifting motor LH (rear) harness connector and ground.

      (+)		(-)	Voltage (V) (Approx.)
      Lifting motor LH (rear)
      Connector	Terminals
      B218	1	Ground	Battery voltage

   Is the inspection result normal?

   YES 

   GO TO STEP 5. 

   NO 

   GO TO STEP 4. 

4. CHECK LIFTING SENSOR (REAR) POWER SUPPLY CIRCUIT
   
   
   1. Turn ignition switch OFF.
   2. Disconnect driver seat control unit.
   3. Check the continuity between driver seat control unit harness connector and lifting motor LH (rear) harness connector.

      Driver seat control unit		Lifting motor LH (rear)		Continuity
      Connector	Terminal	Connector	Terminal
      B213	12	B218	1	Yes

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

      Driver seat control unit		Ground	Continuity
      Connector	Terminal
      B213	12		No

   Is the inspection result normal?

   YES 

   Replace driver seat control unit. Refer to REMOVAL AND INSTALLATION .

   NO 

   Repair or replace harness.

5. CHECK LIFTING SENSOR (REAR) GROUND
   
   
   1. Turn ignition switch OFF.
   2. Check the continuity between lifting motor LH (rear) harness connector and ground.

      Lifting motor LH (rear)		Ground	Continuity
      Connector	Terminal
      B218	3		Yes

   Is the inspection result normal?

   YES 

   Replace lifting motor LH (rear). Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS.

   NO 

   Repair or replace harness.