Lifting Sensor (Front) Circuit Inspection

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

CHECK FUNCTION

With CONSULT-III

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

DATA MONITOR REFERENCE

Monitor item [OPERATION or UNIT]		Contents
LIFT FR PULSE	-	The front lifting position (pulse) judged from the lifting sensor (front) is displayed

Without CONSULT-III

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	25	Ground	Lifting motor (front) operation	Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Front lifting sensor is OK.

NG: GO TO 2.

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

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

CHECK FRONT LIFTING SENSOR CIRCUIT HARNESS CONTINUITY
1. Disconnect driver seat control unit and lifting motor (front).
2. Check continuity between driver seat control unit connector B401 terminals 16, 25, 31 and lifting motor (front) connector B405 terminals 1, 2, 3.
  16 - 3 : Continuity should exist.
  
  25 - 2 : Continuity should exist.
  
  31 - 1 : Continuity should exist.
3. Check continuity between driver seat control unit connector B401 terminals 16, 25, 31 and ground.
  16 - Ground : Continuity should not exist.
  
  25 - Ground : Continuity should not exist.
  
  31 - Ground : Continuity should not exist.
OK or NG

OK: Replace lifting motor (front). Refer to "FRONT SEAT ".

NG: Repair or replace harness.

Fig 2: Checking Continuity Between Driver Seat Control Unit Connector Terminals And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.