Heated Rear Window
The rear window defrost switch is integral to the HVAC module (if equipped with EMTC) or the FCIM (if equipped with DATC). The FCIM sends the defrost request message to the HVAC module over the CAN. The HVAC module controls the state of the rear window defrost relay. The HVAC module activates the rear window defrost relay when the rear window defrost switch (integral to the FCIM) is pressed. If equipped, the rear window defrost can also be activated/deactivated by using a touchscreen or voice commands.
If equipped, the customer can select certain climate control modes/preferences when the vehicle is started using the remote start feature. When the rear defrost is set to AUTO mode, the rear window defrost activates when the outside temperature is less than 0° C (32° F). Once the ignition is cycled to the ON position, the climate control system returns to the previous settings (last ignition-ON cycle) and adjustments can be made normally. For additional information on how to set the remote start preferences, refer to the Owner's Literature.