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

Without CONSULT-II 

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

   Sliding sensor front lifting sensor	Terminals		Condition	Signal (Reference value)
   	(+)	(-)
   B214	25	Ground	Front lifting motor operation

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

   

OK or NG 

OK: Sliding sensor front lifting sensor is OK.

NG: GO TO 2.

1. Disconnect driver seat control unit and sliding sensor front lifting sensor connector.
2. Check continuity between driver seat control unit connector and sliding sensor front lifting sensor connector.
   CONTINUITY SPECIFICATION
   
   

   A		B		Continuity
   Driver seat control unit connector	Terminal	Sliding sensor front lifting sensor connector	Terminal
   B204	25	B214	25	Yes
   	31		31B

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

   A		Ground	Continuity
   Driver seat control unit connector	Terminal
   B204	25		No
   	31

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

   

OK or NG 

OK: GO TO 3.

NG: Repair or replace harness.

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

   Terminals			Voltage (V) (Approx.)
   (+)		(-)
   Driver seat control unit connector	Terminal
   B204	25	Ground	5

OK or NG 

OK: Replace sliding sensor front lifting sensor.

NG: Replace automatic drive positioner control unit.

Fig 4: Checking Voltage Between Driver Seat Control Unit Connector And Ground