Seat Temperature Control Module: Testing and Inspection

Before testing the seat heat interface module, test the heated seat switch, the heated seat elements, and the heated seat sensor as described in Diagnosis and Testing. If testing of the heated seat switch, elements, and sensor reveals no problems, proceed as follows.
1. Replace the seat heat interface module with a known good unit and test the operation of the heated seats. If OK, discard the faulty seat heat interface module. If not OK, go to Step 2.
2. Test each of the circuits from the heated seat switch, heated seat relay, heated seat elements, and heated seat sensor to the seat heat interface module. Repair any short or open circuits as required.