Wiper system (WSA), function - GF82.30-P-0003GZ

MODEL 164.1 /8 

General information 

The wiper system controls the wiping and washing of the windshield and rear window. The wiper system comprises the following subfunctions:

Windshield 

• Windshield wiping
  • Touch wiping
  • Wiping with slow speed (approx. 40 cycles/min)
  • Wiping with fast speed (approx. 60 cycles/min):
  • Wiping at fixed intervals (without code (345) Rain sensor)
  • Automatic actuation (with code (345) Rain sensor)
• Wiper operation suppression
• Wiper system automatic speed reduction
• Washer nozzle-/washer nozzle hose heater
• Windshield washing
  • Windshield washing
  • Automatic actuation of the headlamp cleaning system (with code (600) Headlamp cleaning system)

The antilock device, blockage detection, braking and stopping of the wiper arms in the end position are performed automatically by the wiper motor (M6/1) and front SAM control unit (N10).

Cancellation of front wiper functions:

Wiping is stopped immediately if the engine hood is opened while the vehicle is stationary.

The ATA [ETW] engine hood switch (S62) sends notification of this status to the rear SAM control unit (N10/8). This forwards the data to the front SAM control unit, which then interrupts the actuation process.

The wiper function is continued under the following conditions:

• Engine hood closed
• Vehicle speed v > 8 km/h

Rear window 

• Rear window wiping
  • Manual wiping
    • Automatic wiping when reversing
• Rear window wash

Rear window wash 

The washing function is activated by pressing the combination switch (S4) beyond the catch point. The window washer fluid pump (M5/1) is actuated directly by the front SAM control unit. At the same time the rear SAM control unit actuates the rear door wiper motor (M6/4).