2427970 - E3030 HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - Description (Low setup)
Description
In the case of poor visibility, it is possible to activate demisting of the rear windscreen and the door mirrors.The heating resistances for these components absorb a considerable amount of energy and they are therefore checked and deactivated after a certain period: the defrosting is timed, according to the following logic, managed by the Body Computer:
- ignition ON (INT/A);
- activation signal from the relevant button, located on the climate control system control panel.
The power supply is also cut off under the following conditions:
- ignition in OFF position
- deactivation signal from the relevant button;
- battery voltage below 8.5 V
- after the first 10 minutes operation, if the engine speed is below 1000 rpm.
Description
The climate control system ECU strategy is also operational in the following situations:
- 'MAX-DEF' command from the climate control: the defrosting function is activated using the logic described previously (deactivating the MAX-DEF control only causes the heated rear windscreen to be switched off if the command to turn it on came from the MAX-DEF; if, on the other hand, the command came from the heated rear windscreen button, it remains on;
- automatic defrosting at low outside temperatures: the heated rear windscreen is switched on automatically if the outside temperature, detected by the climate control system control unit via the special sensor, is below 3 °C.