Rear Window Defog/Heated Mirror

The rear defroster button, located on the Automatic Temperature Control (ATC), controls the rear window defogger and the heated side view mirrors. After pressing the rear defroster button, the ATC sends a bus message over the PCI Bus to the Integrated Power Module (IPM), which controls the Electronic Back Light (EBL) relay. It also sends a bus message to the Driver Door Module (DDM) and the Passenger Door Module (PDM), which the control the heated mirror function. The defroster LED will illuminate when the defroster function is on. The defroster will function for 10 minutes unless cycled off sooner by pressing the defroster button again.