Check Rear Lifting Sensor Circuit

Check the operation malfunction caused by lifter mechanism deformation or parts are loose.

OK or NG 

• OK : GO TO 2.
• NG : Repair the malfunctioning part and check again.

1. Turn ignition switch OFF.
2. Check signal between driver seat control unit connector ground with oscilloscope.
   CONNECTORS SIGNALS REFERENCE
   
   

   Connector	Terminals (Wire color)		Condition	Signal (Reference value)
   	(+)	(-)
   B143	31 (W/R)	Ground	Rear lifting motor operation

   Fig 1: Identifying Signal Between Driver Seat Control Unit Connector Ground

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

OK or NG 

• OK : System is OK.
• NG : GO TO 3.

1. Disconnect driver seat control unit connector and rear lifting motor connector.
2. Check continuity between driver seat control unit connector B143 terminals 31, 32 and rear lifting motor connector B149 terminals 31, 32C.

   31 (W/R) - 31 (W/R) : Continuity should exist. 

   32 (R/W) - 32C (R/W) : Continuity should exist. 

3. Check continuity between driver seat control unit connector B143 terminals 31, 32 and ground.

   31 (W/R) - Ground : Continuity should not exist. 

   32 (R/W) - Ground : Continuity should not exist. 

   Fig 2: Identifying Continuity Between Driver Seat Control Unit Connector B143 Terminals 31, 32 And Ground

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

OK or NG 

• OK : Replace rear lifting motor.
• NG : Repair or replace harness between driver seat control unit and rear lifting motor.