Rear Defogger Switch - Description

DESCRIPTION

NOTE: ATC control shown. MTC control similar.





The switch for the rear window defogger (EBL) system is integral to the mode control knob (4) located in the A/C-heater control (1). When the rear window defogger switch is pressed on, the amber indicator in the control knob illuminates and a request signal is sent to the Totally Integrated Power Module (TIPM) to operate the EBL system.

When the EBL high side driver in the TIPM is energized, current is directed to the rear defogger grid lines to heat the glass to help clear the surface of fog or frost.