Seat Sliding Sensor Circuit Inspection

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

CHECK SLIDING SENSOR INPUT/OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Check signal between driver seat control unit connector and body ground, with oscilloscope.
  
  Fig 1: Checking Sliding Sensor Input/Output Signal (1 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Sliding Sensor Input/Output Signal (2 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: System is OK.
2. NG: GO TO 2.
CHECK SLIDING SENSOR MECHANISM
Check the operation malfunction caused by sliding rail deformation or parts are loose.

OK or NG
1. OK: GO TO 3.
2. NG: Repair the malfunctioning parts.
CHECK HARNESS CONTINUITY
1. Disconnect driver seat control unit connector and sliding motor connector.
2. Check continuity between driver seat control unit connector B143 terminals 20 (G/B), 32 (R/W) and sliding motor B146 terminals 20 (G/B), 32A (R/W).
  20 (G/B) - 20 (G/B): Continuity should exist.
  
  32 (R/W) - 32A (R/W): Continuity should exist.
3. Check continuity between driver seat control unit B143 terminals 20 (G/B), 32 (R/W) and body ground.
  20 (G/B) - Ground: Continuity should not exist.
  
  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 sliding motor.
2. NG: Repair or replace harness driver seat control unit and sliding motor.