Check Front Lifting Motor Circuit

Check the following.

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

OK or NG 

OK: GO TO 2.

NG: Repair or replace the malfunctioning part and check again.

With CONSULT-II 

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

OK or NG 

OK: Front lifting motor circuit is OK.

NG: GO TO 3.

Fig 1: CONSULT II Display - ACTIVE TEST

1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and front lifting motor connector.
3. Check continuity between driver seat control unit connector and front lifting motor connector.
   CONTINUITY SPECIFICATION
   
   

   A		B		Continuity
   Driver seat control unit connector	Terminal	Front lifting motor connector	Terminal
   B205	37	B209	37	Yes
   	45		45

4. Check continuity between driver seat control unit connector and ground.
   CONTINUITY SPECIFICATION
   
   

   A		Ground	Continuity
   Driver seat control unit connector	Terminal
   B205	37		No
   	45

   Fig 2: Checking Continuity Between Driver Seat Control Unit Connector And Front Lifting Motor Connector

   

OK or NG 

OK: GO TO 4.

NG: Repair or replace harness.

1. Connect the driver seat control unit connector.
2. Check voltage between driver seat control unit connector and ground.
   VOLTAGE SPECIFICATION
   
   

   Driver seat control unit connector	Terminals		Condition	Voltage (V) (Approx)
   	(+)	(-)
   B205	37	Ground	Lifting switch (front) ON (DOWN operation)	Battery voltage
   			Other than above	0
   	45		Lifting switch (front) ON (UP operation)	Battery voltage
   			Other than above	0

   Fig 3: Checking Voltage Between Driver Seat Control Unit Connector And Ground

   

OK or NG 

OK: Replace front lifting motor.

NG: Replace driver seat control unit.