Seat Temperature Control Module: Testing and Inspection

DIAGNOSIS AND TESTING - HEATED SEAT MODULE

CAUTION: When equipped with a leather wrapped heated steering wheel and replacement of a Heated Seat Module (HSM) is required, the new HSM must be manually configured with a scan tool Programming and Relearning . Failure to follow these instruction may result in damage to the heated steering wheel.

NOTE: Vehicles equipped with the heated seat option utilize a low voltage cut-off feature. This feature turns off power to the heated seat system anytime vehicle voltage is below 11.7 volts or above 15.5 volts. Be certain to check the vehicle electrical system for proper voltage anytime the heated seat system appears inoperative.

NOTE: If a Diagnostic Trouble Code (DTC) can not be verified, it is a good indication that an INTERMITTENT fault condition may be present. To help find an intermittent problem, sit in the seat in question and move around the heating elements within the seat while testing continuity. also wiggle the heated seat wire harness and electrical connectors while testing continuity.

NOTE: For complete circuit diagrams, see Wiring Information. Wiring Information includes wiring diagrams, connector pin-out and location views, details of wire harness routing and retention, splice and ground locations and proper wire and connector repair procedures.

1. Check the ignition switch fuse in the Totally Integrated Power Module. Repair as necessary.
2. Check the vehicles battery open-circuit voltage and charging system performance. If the vehicle's electrical system is defective or weak it may not be supplying sufficient energy to operate the heated seat or heated steering wheel system.
3. Using a scan tool, check for any Diagnostic Trouble Codes (DTCs) related to the Heated Seat Module (HSM). If any DTCs are found, repair as necessary Testing and Inspection
4. If there are no DTCs and the heated seat, vented seat or heated steering wheel system does not operate, see wiring information and repair as necessary.
5. If wiring is OK, replace the HSM.
6. When equipped with a leather wrapped heated steering wheel, verify the HSM is configured to the leather steering wheel option with a scan tool Programming and Relearning.