Diagnosis Procedure
- CHECK TELESCOPIC SENSOR SIGNAL
- Turn Ignition Switch ON.
- Check voltage signal between Driver Seat Control Unit connector and ground with oscilloscope.
(+)
(-)
Condition
Voltage (V)
(Approx.)
Driver Seat Control Unit
Connector
Terminals
B514
31
Ground
Steering column
Operate
Other than the above
0 or 5
Is the inspection result normal?
YES
Replace Driver Seat Control Unit. Refer to Removal and Installation .
NO
GO TO 2.
- CHECK TELESCOPIC SENSOR CIRCUIT
- Turn Ignition Switch OFF.
- Disconnect Driver Seat Control Unit connector and telescopic motor connector.
- Check continuity between Driver Seat Control Unit harness connector and telescopic motor harness connector.
Driver Seat Control Unit
Telescopic motor
Continuity
Connector
Terminal
Connector
Terminal
B514
31
M49
5
Existed
- Check continuity between Driver Seat Control Unit harness connector and ground.
Driver Seat Control Unit
Ground
Continuity
Connector
Terminal
B514
31
Not existed
Is the inspection result normal?
YES
GO TO 3.
NO
Repair or replace harness or connector.
- CHECK TELESCOPIC SENSOR POWER SUPPLY
- Connect Driver Seat Control Unit connector.
- Turn Ignition Switch ON.
- Check voltage between telescopic motor harness connector and ground.
(+)
(-)
Voltage (V)
(Approx.)
Telescopic motor
Connector
Terminals
M49
4
Ground
12
Is the inspection result normal?
YES
GO TO 5.
NO
GO TO 4.
- CHECK TELESCOPIC SENSOR POWER SUPPLY CIRCUIT
- Turn Ignition Switch OFF.
- Disconnect Automatic Drive Positioner Control Unit connector.
- Check continuity between Automatic Drive Positioner Control Unit harness connector and telescopic motor harness connector.
Automatic Drive Positioner Control Unit
Telescopic motor
Continuity
Connector
Terminal
Connector
Terminal
M52
27
M49
4
Existed
- Check continuity between Automatic Drive Positioner Control Unit harness connector and ground.
Automatic Drive Positioner Control Unit
Ground
Continuity
Connector
Terminal
M52
27
Not existed
Is the inspection result normal?
YES
Replace Automatic Drive Positioner Control Unit. Refer to Removal and Installation .
NO
Repair or replace harness or connector.
- CHECK TELESCOPIC SENSOR GROUND CIRCUIT
- Turn Ignition Switch OFF.
- Disconnect Automatic Drive Positioner Control Unit connector.
- Check continuity between Automatic Drive Positioner Control Unit harness connector and telescopic motor harness connector.
Automatic Drive Positioner Control Unit
Telescopic motor
Continuity
Connector
Terminal
Connector
Terminal
M51
20
M49
6
Existed
- Check continuity between Automatic Drive Positioner Control Unit harness connector and ground.
Automatic Drive Positioner Control Unit
Ground
Continuity
Connector
Terminal
M51
20
Not existed
Is the inspection result normal?
YES
Replace telescopic motor.
NO
Repair or replace harness or connector.