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Home >> Lincoln >> 2018 >> MKZ Select, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1592 (Glass, Frames And Mechanisms (Except Electric)) >> Description And Operation >> Glass, Frames and Mechanisms - Vehicles With: One-Touch Open and Close Front Windows - System Operation and Component Description >> Rear Window Defrost (DATC)

Rear Window Defrost (DATC)

WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.

When the rear window defrost switch (located in the HVAC module) is activated, a message is sent to the BCM through the MS-CAN. When the BCM receives the request, it grounds the control circuit to activate the rear window defrost relay (located in the BJB). When the rear window defrost is activated from the switch, the rear window defrost grid is energized. The rear window defrost system may also be automatically activated as an extra load for accelerated engine warm-up, however the defrost switch status LED will remain off unless the defrost switch is activated.

If equipped, the rear window defrost system can also be commanded on and off using voice commands or by touching the rear window defrost button located on the touchscreen interface (FDIM). For additional information on voice or touchscreen commanded features, refer to the Owner's Literature.

The BCM deactivates the rear window defrost relay when one of these conditions is met:

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