Seat Temperature Sensor: Testing and Inspection

Fig. 6 Passenger Seat Wire Harness Routing:

HEATED SEAT ELEMENT AND SENSOR
The heated seat module will self-diagnose shorted or open heated seat element circuits and sensor circuits. Refer to Heated Seat System Diagnosis and Testing in this section for additional diagnosis and testing procedures. Testing and Inspection

To manually check the heated seat element and sensor circuits, proceed as follows. The wire harness connectors for the seat cushion and seat back heating elements and sensor are located under the seat, near the rear edge of the seat cushion frame . Refer to Wiring Diagrams for the location of complete heated seat system wiring diagrams.

Heated Seat Sensor

NOTE: ANY RESISTANCE VALUES (OHMS) GIVEN IN THE FOLLOWING TEXT ARE SUPPLIED USING THE AUTOMATIC RANGE GENERATED BY A FLUKE AUTOMOTIVE METER. IF ANOTHER TYPE OF MEASURING DEVICE IS USED THE VALUES GENERATED MAY NOT BE THE SAME AS THE RESULTS SHOWN HERE, OR MAY HAVE TO BE CONVERTED TO THE RANGE USED HERE.

1. Position the appropriate seat in the full forward position.
2. Make certain the ignition switch is in the OFF position.

Fig. 10 Heated Seat Connector:

3. Disconnect the 4-way heated seat wire harness connector from the seat cushion frame. Using an ohmmeter, check the resistance between the heated seat sensor input circuit cavity and the heated seat sensor feed circuit cavity in the 4-way heated seat wire harness connector.
The heated seat sensor resistance should be between 1 kilo ohm and 100 kilo ohms.
If OK, go to Step 4.
If not OK, replace the faulty seat cushion heating element assembly.

4. Test the seat wire harness between the heated seat module connector and the 4-way heated seat wire harness connector for shorted or open circuits.
If OK, refer to Diagnosis and Testing the Heated Seat Module for the proper heated seat module diagnosis and testing procedures Testing and Inspection.
If not OK, repair the shorted or open heated seat wire harness as required.