Front Lifting Sensor Circuit Inspection

WARNING: This page is about a different car, the 2003 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUNCTION

With CONSULT-II

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

CHECK FUNCTION CHART

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

Fig 1: Displaying "LIFT FR PULSE" on 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.

Fig 2: Oscilloscope Signal Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Checking Signal Between Driver Seat Control Unit Connector And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK : Front lifting sensor is OK.
NG : GO TO 2.

CHECK FRONT LIFTING SENSOR CIRCUIT HARNESS CONTINUITY
1. Disconnect driver seat control unit connector and front lifting motor connector.
2. Check continuity between driver seat control unit connector B303 terminals 25 (Y/B), 31 (R/W) and front lifting motor connector B309 terminals 25 (Y/B), 31B (R/W).
  1. 25 (Y/B) - 25 (Y/B): Continuity should exist.
  2. 31 (R/W) - 31B (R/W): Continuity should exist.
3. Check continuity between driver seat control unit connector B303 terminals 25 (Y/B), 31 (R/W) and ground.
  1. 25 (Y/B) - Ground: Continuity should not exist.
  2. 31 (R/W) - Ground: Continuity should not exist.
OK or NG
1. OK : Replace front lifting motor.
2. NG : Repair or replace harness between driver seat control unit and front lifting motor.
Fig 4: Checking Continuity Between Driver Seat Control Unit Connector B303 Terminals 25, 31 And Front Lifting Motor Connector B309 Terminals 25, 31B, And Between Connector B303 Terminals 25, 31 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.