Optional Seat Heating (1999 M.Y.): Diagnosis

The seat heater switches contain a diagnostic mode of operation that provides a self check of the system components when activated. The diagnostic information is provided via flash codes from the LED's.

Diagnostic mode activation:

• Switch ignition OFF
• Press and hold the suspect seat heating switch button
• Switch the ignition ON
• Release the heating switch button
• Both LED's illuminate steady indicating the seat heating system is functioning.
• Within 10 seconds the LED will begin flashing the following codes:
  • Single flash = Switch faulty due to overheating or short
  • Double flash = Short or open in temperature sensor or it's circuit.
  • Triple flash = Heating element shorted

Normal operation of seat heating can only be resumed after cycling the ignition key.