Automatic windshield wiper
Under normal operating conditions, the windshield wiper operates intermittently, at low or high speed. The wiper mode can be changed using the ring on the wiper lever. The mode can also change automatically, depending on the vehicle speed (except for vehicles equipped with a rain sensor).
If the wiper speed is selected while driving, the wiper will switch to a lower speed when the vehicle is stopped:
- from continuous operation at high speed to continuous operation at low speed;
- from continuous operation at low speed to intermittent operation.
When the vehicle is restarted, the wiper will return to the selected speed.
Note. If the vehicle is equipped with a rain sensor, the wiper speed is independent of vehicle speed.
Note. Any action on the wiper lever takes precedence and overrides the mode set by the UCH.
The automatic mode is not activated if the low or high wiper speed has been selected while the vehicle is stationary.
Too much load on the wiper arms (for example, at high speed, etc.) The UCH automatically switches the wiper to a lower speed.
If the wiper mechanism is blocked (for example, when the brushes freeze to the windshield, etc.) The UCH automatically cuts off the power supply to the electric motor.
Rain sensor
On vehicles equipped with a rain sensor, the UCH does not control the intermittent wiper operation. In this case, the speed of the wiper and the time delay between the movements of the brushes do not depend on the speed of the vehicle.
Attention! The windshield wiper is different on right-hand drive and left-hand drive vehicles.
Functional diagram: 1 - power supply when working at high speed; 2 - power supply when operating at low speed; 3 - power supply during operation in automatic mode; 4 - wiper on / off relay, 5 - low / high speed relay; 6 - electromagnetic reverse braking of the electric motor; 7 - rain sensor; 8 - CEKB; 9 - wiper switch; 10 - windshield wiper motor