Rain Sensor Operation

Rain Sensor Operation

The Rain/Light Sensor controls the interval duration and the wiper speed after pushing the contact button on the side of the wiper lever.

The aim of rain sensor operation is to relieve the strain on the driver by automatically controlling the wipers. Even in very different rain situations, manual intervention is no longer necessary.

The wiper motor speed is controlled steplessly by means of a PWM signal. The Rain/Light Sensor sets the wiper motor speed depending on the degree of rain/snow on the windshield.

A defined minimum speed is maintained in order to avoid skipping of the wiper blades. This minimum speed is 35 wipe strokes per minute.

Wiper speed control is performed in addition to the interval duration. As of a certain rain intensity, adjustments are made to the wiper speed control only.

After every wiping cycle, the wiper motor moves into the reversing position. if the wiper motor is not triggered again by the Rain/Light Sensor within a period of 3 minutes, the wiper motor moves into the park position.

Sensitivity can be adjusted manually in 4 stages with the thumbwheel on the wiper switch.

After KL R is switched off, if the rain sensor is required the button must be pressed again.