Check Front Lifting Motor Circuit

1. CHECK FRONT LIFTING MECHANISM 

   Check the following.

   • Operation malfunction caused by lifter mechanism deformation or pinched harness or other foreign materials
   • Operation malfunction caused by foreign materials adhered to the lifter motor or lead screws
   • Operation malfunction and interference with other parts by installation

   OK or NG 

   OK:

   • GO TO 2 (With CONSULT-II).
   • GO TO  3 (Without CONSULT-II).

   NG: Repair the malfunctioning part and check again.

2. CHECK FUNCTION 

   With CONSULT-II 

   Check operation with "SEAT LIFTER FR" in ACTIVE TEST.

   Fig 1: Identifying CONSULT II Display - ACTIVE TEST

   Courtesy of NISSAN MOTOR CO., U.S.A.
   SEAT LIFTER FUNCTION
   
   

   Test item	Description
   SEAT LIFTER FR	The front end lifter motor is activated by receiving the drive signal.

   OK or NG 

   OK: Front lifting motor circuit is OK.

   NG: GO TO 3.

3. CHECK FRONT LIFTING MOTOR HARNESS CONTINUITY 
   1. Turn ignition switch OFF.
   2. Disconnect driver seat control unit connector and front lifting motor connector.
   3. Check continuity between driver seat control unit connector B153 and terminals 5, 13 and front lifting motor connector B164 terminals 5, 13.

      5 (LG) - 5 (LG) : Continuity should exist. 

      13 (Y) - 13 (Y) : Continuity should exist. 

   4. Check continuity between driver seat control unit connector B153 and terminals 5, 13 and ground.

      5 (LG) - Ground : Continuity should not exist. 

      13 (Y) - Ground : Continuity should not exist. 

      Fig 2: Identifying Continuity Between Driver Seat Control Unit Connector B153 And Terminals 5, 13 And Ground

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

   OK or NG 

   OK: GO TO 4.

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

4. CHECK DRIVER SEAT CONTROL UNIT OUTPUT SIGNAL 

1. Connect the driver seat control unit connector.
2. Front lifting switch operate, check voltage between driver seat control unit connector and ground.
Fig 3: Identifying Voltage Between Driver Seat Control Unit Connector And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

OK: Replace front lifting motor.

NG: Replace driver seat control unit.