Heated Rear Windshield And Door Mirrors
The heated rear windshield and door mirrors are activated by pressing the switch on the climate control module (CCM) (3/112). The climate control module (CCM) transmits information via the controller area network (CAN) indicating the status of the electrical heating to the following:
- central electronic module (CEM) (4/56)
- driver door module (DDM) (3/126)
- passenger door module (PDM) (3/127).
On vehicles with certain diesel engines the rear demist can start without manual activation. This means that the engine sometimes needs to reach a much greater working temperature to burn soot particles that are trapped in the particle filter.
By starting the rear demist, together with other actions, the vehicle's alternator is loaded and the engine coolant temperature rises.
Read more detailed information about this function in Design and Function, Engine control module (ECM).