Reclining Sensor Circuit Inspection

CHECK RECLINING SENSOR MECHANISM
Check the operation malfunction caused by reclining mechanism deformation or parts are loose.

OK or NG
1. OK: GO TO 2.
2. NG: Repair the malfunctioning part and check again.
CHECK RECLINING SENSOR INPUT/OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Check signal between driver seat control unit connector and ground, with oscilloscope.
  
  Fig 1: Driver Seat Control Unit Connector Terminals Signal Reference Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Reclining Sensor Input/Output Signal
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: System is OK.
2. NG: GO TO 3.
CHECK HARNESS CONTINUITY
1. Disconnect driver seat control unit connector and reclining motor connector.
2. Check continuity between driver seat control unit connector B143 terminals 30 (L), 32 (R/W) and reclining motor connector B147 terminals 30 (L), 32 (R/W).
  1. 30 (L) - 30 (L): Continuity should exist.
  2. 32 (R/W) - 32 (R/W): Continuity should exist.
3. Check continuity between driver seat control unit connector B143 terminals 30 (L), 32 (R/W) and ground.
  1. 30 (L) - Ground: Continuity should not exist.
  2. 32 (R/W) - Ground: Continuity should not exist.
  Fig 3: Checking Harness Continuity
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Replace reclining motor.
2. NG: Repair or replace harness between driver seat control unit and reclining motor.