Reclining Sensor Circuit Inspection

WARNING: This page is about a different car, the 2007 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUNCTION

With CONSULT-II

Check operation with "RECLN PULSE" on the DATA MONITOR to make sure the pulse changes.

DATA MONITOR REFERENCE

Monitor item [OPERATION or UNIT]		Contents
RECLN PULSE	-	The seat reclining position (pulse) judged from the reclining sensor is displayed

Fig 1: CONSULT II Display - DATA MONITOR

Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II

Turn ignition switch OFF.

Check signal between driver seat control unit connector and ground, with oscilloscope.

TERMINALS SIGNAL REFERENCE

Connector	Terminals		Condition	Signal
Connector	(+)	(-)	Condition	Signal
B401	9	Ground	Reclining motor operation	Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Reclining sensor circuit is OK.

NG: GO TO 2.

Fig 2: Identifying Signal Between Driver Seat Control Unit Connector And Ground, With Oscilloscope

Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK RECLINING SENSOR CIRCUIT HARNESS CONTINUITY
1. Disconnect driver seat control unit and reclining motor LH.
2. Check continuity between driver seat control unit connector B401 terminals 9, 31 and reclining motor LH connector B404 terminals 1, 2.
  9 - 2 : Continuity should exist.
  
  31 - 1 : Continuity should exist.
3. Check continuity between driver seat control unit connector B401 terminals 9, 31 and ground.
  9 - Ground : Continuity should not exist.
  
  31 - Ground : Continuity should not exist.
  
  Fig 3: Checking Continuity Between Driver Seat Control Unit Connector B401 Terminals 9, 31 And Ground, And Between Connector B401 Terminals 9, 31 And Reclining Motor LH Connector B404 Terminals 1, 2
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: Replace reclining motor. Refer to "FRONT SEAT ".

NG: Repair or replace harness.