GF82.30-P-4006RC Wiper System Automatic Speed Reduction, Function

GF82.30-P-4006RC Wiper System Automatic Speed Reduction, Function
- except CODE (494) USA version

Function requirements, general
^ C. 15R On
^ Combination switch (S4) in position "1", "2" or "3"
^ Speed reduction from v > 8 km/h to v < 5 km/h

Automatic wiper speed reduction, general
The automatic speed reduction is activated at a speed reduction from v > 8 km/h to v < 5 km/h, because at this speed the windshield is normally not very wet.

Automatic wiper speed reduction comprises the following subfunctions:
^ Function sequence for automatic wiper speed reduction, general
^ Function sequence for deactivating automatic wiper speed reduction

Function sequence for automatic wiper speed reduction, general
If the driver SAM control unit with fuse and relay module (N10/1) detects a speed reduction from v > 8 km/h to v < 5 km/h, then the driver SAM control unit switches the wiper motor (M6/1) back one stage.

Function sequence for deactivating automatic wiper speed reduction
Actuation of the wiper motor at the speed before automatic speed reduction is accomplished by one of the following events:
- Speed v > 8 km/h
- Changing wiper speed

The vehicle speed is sent by the instrument cluster (A1) to the interior CAN and read in by the driver SAM control unit.
The status of the combination switch is read in by the steering column tube module (N80) and sent over the interior CAN to the driver SAM control unit. This evaluates the signals and actuates the wiper motor accordingly.