Symptoms - Seat Heating and Cooling

Note

The following steps must be completed before using the symptom tables:

1. Perform the Diagnostic System Check - Vehicle before using the Heated or Vented Seat Malfunction procedure in order to verify that all of the following are true: There are no DTCs set. The serial data communications are functioning as designed.
2. Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
3. Review the system operation in order to familiarize yourself with the system functions. Refer to: Heated/Vented Seat Description and Operation Rear Heated Seats Description and Operation Visual/Physical Inspection

Note

The Automatic Step-Down function may cause the heated seats to change modes or turn off based on period of time active or temperature.

Note

Different vehicles can NOT be used as comparison as seat material, element design, etc. all directly affect the output temperature of the heated seats. Inspect for aftermarket devices which may affect the operation of the Heated/ Vented Seat System. Inspect the easily accessible or visible system components for obvious damage or conditions which may cause the symptom. Verify that the customer is using the system correctly and understands the operation. The following conditions may affect heated/ vented seat operation: – Wet Seats – Interior Temperature – Aftermarket Accessories – Battery Load or Condition – Damaged Seats – Objects Placed On Seats Inspect the seats for causes of poor temperature output: – Damaged seat cushions or seat backs – Blocked or damaged air inlet or outlet vents Intermittent Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections. Symptom List Refer to the appropriate diagnostic procedure listed below: Front Heated Seat Malfunction Rear Heated Seat Malfunction Vented Seat Malfunction