Heated Seat System

The heated seat system is capable of performing some self-diagnostics. The following table depicts the various monitored conditions which will be reported to the vehicle operator or technician by flashing the individual heated seat switch Light Emitting Diode (LED) indicator lamps. Refer to the HEATED SEAT SYSTEM SELF-DIAGNOSIS table for condition identification. The driver heated seat switch indicator lamps will flash if a malfunction occurs in the driver heated seat, and the passenger heated seat switch indicator lamps will flash for a passenger heated seat malfunction. If a monitored heated seat system malfunction occurs, the switch indicator lamps will flash at a pulse rate of about one-half second on, followed by about one-half second off for a duration of about one minute after the switch for the inoperative heated seat is depressed in either the Low or High direction. This process will repeat every time the inoperative heated seat switch is actuated until the problem has been corrected.

Heated Seat System Self-diagnosis:

Diagnostic logic is built into the heated seat module to help locate the problem by the most efficient means possible. Anytime a problem is suspected, locate the diagnosis and testing procedure for the component in question and follow the steps until the specific problem is located and resolved. Once the problem is thought to be corrected, verify correct system operation. If the heated seat system is functioning correctly return the vehicle to service.

If a problem could not be verified such as not finding anything wrong when following the diagnostic procedure, this is a good indication that an INTERMITTENT problem may be present. You must then attempt to find the intermittent problem, such as moving the heating element within the seat while testing continuity or wiggling the wire harness's/ electrical connectors under the seat while testing continuity. Always, eliminate all other potential problems before attempting to replace the heated seat module.

PRELIMINARY TEST
Refer to Wiring for the location of complete heated seat system wiring diagrams. Before testing the individual components in the heated seat system, perform the following preliminary checks:

WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

- If the heated seat switch back lighting and the cluster illumination lamps do not illuminate with the headlamps or park lamps turned On, refer to the Instrument Cluster for the location of cluster illumination lamp diagnosis and testing procedures. If the heated seat switch back lighting does not illuminate, but the cluster illumination lamps do illuminate with the headlamps or park lamps turned On.
- If a single LED indicator lamp for one heated seat switch does not operate and the heated seat elements do heat, refer to testing for the heated seat switch diagnosis and testing procedures.
- If both LED indicator lamps for a heated seat switch operate, but the heated seat elements do not heat.
- If the indicator lamp on either heated seat switch remains illuminated after the heated seat has been turned Off.