Vehicles are equipped with a lever switch with a ring to adjust the wiper blade movement frequency in automatic mode, or with a system for automatically changing the wiper blade movement frequency in intermittent mode.
Automatic operation
In both cases, vehicles are equipped with:
- – a sensor sensitivity control on the windshield wiper switch stalk;
- – a system for automatically changing the wiper blade movement frequency in intermittent mode and a light sensor.
To activate the system, set the windshield wiper switch to the position corresponding to the intermittent operating mode.
When turning off the ignition, set the windshield wiper switch to the "stop" position, then back to the "intermittent mode" position.
Fig. Block diagram of windshield wiper and washer operation: 1 - Remote control unit under the steering wheel; 2 - rain and light sensor; 3 - driver control input; 4 - diode block and switch; 5 - UCH (Centralized Switching Unit); 6 - wired connection; 7 - multiplex communication channel; 8 - information about reverse gear engagement and vehicle speed; 9 - protection and switching unit; 10 - windshield and rear window washer pump; 11 - rear window wiper motor; 12 - windshield wiper motor
Operating Features
In the event of increased resistance to the movement of the wiper arms (for example, when driving at high speed), the protection and switching unit automatically switches the wiper to a lower speed operating mode.
In the event of a wiper mechanism jam (for example, if the blades freeze to the windshield), the protection and switching unit automatically cuts off power to the electric motor only when the vehicle is stationary.
If the windshield wiper is activated by the switch or the rain sensor, then when reverse gear is engaged, the rear window wiper is activated.
Commands from the wiper switch have the highest priority and override commands from the UCH and the protection and switching unit.
The movement frequency of the rear window wiper blades depends on the vehicle's speed.
If the UCH does not receive a control signal from the steering column switch, the wiper automatically switches to low speed operation.
The UCH has special configurations to ensure the windshield cleaning and washing functions.
