Check Front Lifting Sensor Circuit

With CONSULT-II 

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

Fig 1: CONSULT II Display - Data Monitor

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

Without CONSULT-II 

1. Turn ignition switch OFF.
2. Check signal between driver seat control unit connector and ground, with oscilloscope.
   TERMINAL SIGNAL CHART
   
   

   Connector	Terminals (Wire color)		Condition	Signal (Reference value)
   	(+)	(-)
   B152	19 (G/R)	Ground	Front lifting motor operation

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

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

OK or NG 

OK : Front lifting sensor circuit is OK.

NG : GO TO 2.

1. Disconnect driver seat control unit connector and front lifting motor connector.
2. Check continuity between driver seat control unit connector B152 terminals 19, 28C and front lifting motor connector B164 terminals 19, 28A.

   19 (G/R) - 19 (G/R) : Continuity should exist. 

   28C (B/W) - 28A (B/W) : Continuity should exist. 

3. Check continuity between driver seat control unit connector B152 terminals 19, 28C and ground.

   19 (G/R) - Ground : Continuity should not exist. 

   28C (B/W) - Ground : Continuity should not exist. 

   Fig 3: Identifying Continuity Between Driver Seat Control Unit Connector B152 Terminals 19, 28C And Ground

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

OK or NG 

OK : Replace front lifting motor.

NG : Repair or replace harness between driver seat control unit and front lifting motor.