Heated Glass Element: Description and Operation

Heated Windshield Wiper Area Defogger

How the Circuit Works

Battery voltage is supplied at all times through fuse 14 (in the under-hood fuse/relay box) to the heated wiper area relay contacts. With the ignition switch in ON (II), battery voltage is supplied through fuse 30 (in the under-dash fuse/relay box) to the HVAC control unit (RT, RTX, LX) or the climate control unit (RTS, RTL, EX-L).

When the outside air temperature sensor senses cold outside air, a signal for heated wiper area is communicated via a multiplexed signal to the MICU. The MICU provides ground for the heated wiper area relay coil, which energizes the relay. Battery voltage is supplied to the heated wiper area through the energized relay.