Reclining Sensor Circuit Inspection

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUNCTION

With CONSULT-III

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

RECLN PULSE MONITOR ITEM CHART

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

Without CONSULT-III

Turn ignition switch OFF.

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

DRIVER SEAT CONTROL UNIT CONNECTOR AND GROUND

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

Fig 1: Checking Signal Between Driver Seat Control Unit Connector And Ground

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

OK or NG

OK: Reclining sensor circuit is OK.

NG: GO TO 2.

CHECK RECLINING SENSOR HARNESS CONTINUITY 1
1. Disconnect driver seat control unit and reclining motor LH.
2. Check continuity between driver seat control unit connector B401 (A) terminal 31 and reclining motor LH connector B405 (B) terminal 2.
  31 - 2: Continuity should exist.
3. Check continuity between driver seat control unit connector B401 (A) terminal 31 and ground.
  31 - Ground: Continuity should not exist.
Fig 2: Checking Reclining Sensor Harness Continuity 1
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 3.

NG: Repair or replace harness.
CHECK RECLINING SENSOR HARNESS CONTINUITY 2
1. Check continuity between driver seat control unit connector B401 (A) terminal 9 and reclining motor LH connector B405 terminal 1.
  9 - 1: Continuity should exist.
2. Check continuity between driver seat control unit connector B401 (A) terminal 9 and ground.
  9 - Ground: Continuity should not exist.
Fig 3: Checking Reclining Sensor Harness Continuity 2
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

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

NG: Repair or replace harness.