3309416 - E3030 HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - Description

Description

The heated rear windscreen and the demisting resistances for the door mirrors and the windscreen absorb a considerable amount of energy. they must therefore be turned off once they have been working for a certain period of time.The system for demisting the rear window and door mirrors and heating the windscreen is controlled by a timer as follows.

The system is turned on with:

• with the key in the ON position
• activation signal from the relevant button, located on the climate control system control panel.

The coils remain supplied for 20 minutes, then the power supply is cut off.

The power supply is also cut off under the following conditions:

• ignition in OFF position;
• deactivation signal from the relevant button;
• after the first 10 seconds of operation, if engine speed drops below 1000 rpm.

The led stays on as long as the back window heater element is activated.The control software is managed by the services control unit (the climate control system panel houses only the control button and led, but does not affect the activation software in any way).The rearscreen defrosting circuit is protected by a special fuse and controlled by a specific relay located in the luggage compartment junction unit.The resistances for the door mirrors and the windscreen are protected by another specific fuse and controlled by a specific relay, located in the luggage compartment junction unit.The circuit for the integrated services control unit is protected by a special fuse in the junction unit.