Windshield washer, function - GF82.35-P-3002RC

MODEL 171.4 as of model year 09/YoM 08 model refinement package 

General function requirements  C. 15R On

Washing windshield, general  The windshield is kept clean by washing the windshield.

The windshield wiping function comprises the following subfunctions:  Washing function sequence; Afterwiping function sequence.

Washing function sequence  The washing function is activated by pressing the combination switch (S4) down beyond the catch point. The combination switch is read in by the steering column tube module control unit (N80). The steering column tube module transmits the "Wash" request over the interior CAN. The driver SAM control unit with fuse and relay module (N10/1) receives the request and actuates the window washer fluid pump (M5/1). During the wash cycle, wiping takes place at the wiper speed set using the combination switch. At t = 15 s continuous actuation of the window washer fluid pump, a "stuck combination switch" is detected and the window washer fluid pump is switched off. Three after-wipes take place.

Afterwiping function sequence  Afterwiping becomes active as soon as the combination switch is no longer activated. The number of afterwipe cycles is dependent on the operation time of the combination switch.

- Actuation time t < 1 s: A single afterwipe occurs.

- Actuation time t > 1 s: Three afterwipes occur.

Afterwiping is carried out at the wiper speed set at the combination switch.