Diagnosis Procedure

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

1. CHECK RECLINING SENSOR 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	4	Ground	Seat reclining	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 RECLINING SENSOR CIRCUIT
   
   
   1. Turn ignition switch OFF.
   2. Disconnect driver seat control unit and reclining motor LH.
   3. Check continuity between driver seat control unit harness connector and reclining motor LH harness connector.

      Driver seat control unit		Reclining motor LH		Continuity
      Connector	Terminal	Connector	Terminal
      B213	4	B217	3	Yes

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

      Driver seat control unit		Ground	Continuity
      Connector	Terminal
      B213	4		No

   Is the inspection result normal?

   YES 

   GO TO STEP 3. 

   NO 

   Repair or replace harness.

3. CHECK RECLINING SENSOR POWER SUPPLY
   
   
   1. Connect driver seat control unit.
   2. Turn ignition switch ON.
   3. Check voltage between reclining motor LH harness connector and ground.

      (+)		(-)	Voltage (V) (Approx.)
      Reclining motor LH
      Connector	Terminals
      B217	4	Ground	Battery voltage

   Is the inspection result normal?

   YES 

   GO TO STEP 5. 

   NO 

   GO TO STEP 4. 

4. CHECK RECLINING SENSOR POWER SUPPLY CIRCUIT
   
   
   1. Turn ignition switch OFF.
   2. Disconnect driver seat control unit.
   3. Check continuity between driver seat control unit harness connector and reclining motor LH harness connector.

      Driver seat control unit		Reclining motor LH		Continuity
      Connector	Terminal	Connector	Terminal
      B213	12	B217	4	Yes

   4. Check 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 RECLINING SENSOR GROUND
   
   
   1. Turn ignition switch OFF.
   2. Check continuity between reclining motor LH harness connector and ground.

      Reclining motor LH		Ground	Continuity
      Connector	Terminal
      B217	2		Yes

   Is the inspection result normal?

   YES 

   Replace reclining motor LH. Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS.

   NO 

   Repair or replace harness.