Seat Temperature Sensor: Testing and Inspection

HEATED SEAT SENSOR - 2ND ROW SEATS

For complete circuit diagrams, refer to Diagrams/Electrical.

1. Locate the 2nd row Heated Seat Module (HSM). Memory/Heated Seat Adjustable Pedal Module - Description Description for information.
2. Back-probe the HSM wire harness connector, do not disconnect. With the heated seat system on, check the heated seat temperature sensor input cavity for a range in voltage from approx. 1.72 - 3.0 volts. It should be within this range, If OK go to STEP 3. If NOT OK, check for the proper 5 volt supply to the heated seat sensor, from the HSM. Refer to Diagrams/Electrical for specific information. If the HSM has the proper 12v and ground supply and 5 volts is not being supplied to the sensor from the module, replace the HSM.
3. Test the seat wire harness between the HSM connector and the heated seat element wire harness connector for shorted or open circuits. If OK, Heated Seat Element - Diagnosis and Testing, for the proper heated seat element diagnosis and testing procedures. If not OK, repair the shorted or open heated seat wire harness as required.