Seatback Thermal Electric Unit Sensor

SEATBACK THERMAL ELECTRIC UNIT SENSOR

Component Function Check


1. CHECK SEATBACK THERMAL ELECTRIC UNIT SENSOR FUNCTION

Check whether or not the temperature of the seatback thermal electric unit changes in accordance with the
HEAT or COOL switch operation of the climate controlled seat control switch.
Is the inspection result normal?
YES- INSPECTION END
NO- Refer to "Diagnosis Procedure" .


Diagnosis Procedure


1. CHECK SEATBACK THERMAL ELECTRIC UNIT SENSOR SIGNAL

1.Turn ignition switch ON.
2.Check voltage between seatback thermal electric unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.

2. CHECK SEATBACK THERMAL ELECTRIC UNIT SENSOR CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect climate controlled seat control unit connector and seatback thermal electric unit connector.
3.Check continuity between climate controlled seat control unit harness connector and seatback thermal electric unit harness connector.





4.Check continuity between climate controlled seat control unit harness connector and ground.





Is the inspection result normal?
YES- Replace climate controlled seat control unit.
NO- Repair or replace harness.

3. CHECK SEATBACK THERMAL ELECTRIC UNIT SENSOR GROUND CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect climate controlled seat control unit connector and seatback thermal electric unit connector.
3.Check continuity between climate controlled seat control unit harness connector and seatback thermal electric unit harness connector.





4.Check continuity between climate controlled seat control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace harness.

4. CHECK SEATBACK THERMAL ELECTRIC UNIT SENSOR

Check seatback thermal electric unit sensor.
Refer to "Component Inspection" .
Is the inspection result normal?
YES- GO TO 5.
NO- Replace seatback thermal electric unit.

5. CHECK INTERMITTENT INCIDENT

Refer to "Intermittent Incident" Intermittent Incident.
- INSPECTION END


Component Inspection


1. CHECK SEATBACK THERMAL ELECTRIC UNIT SENSOR

1.Turn ignition switch OFF.
2.Disconnect seatback thermal electric unit connector.
3.Check resistance between seatback thermal electric unit terminals.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace seatback thermal electric unit. Refer to "CLIMATE CONTROLLED SEAT UNIT : Disassembly and Assembly" Front Seat.