1. Some models are equipped with an automatic lock defrost system. The electronic control unit controls the power supply to the switch in the driver's door handle. When the handle is raised, the heating element in the lock cylinder receives power.
2. The only component to be replaced is the electronic control unit. The heating element is built into the lock cylinder, the switch is built into the door handle.
3. To remove the control unit, remove the door upholstery panel as described in chapter 11.
4. Disconnect the wiring connectors from the control unit, unscrew the mounting bolts and remove the door unit (pic. 12.4).
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