The wiper motor control unit is fitted with the windscreen wiper motor in a single unit. The wiper motor control unit is a slave system to the electrical control unit and, depending on the vehicle model, have several functions, e.g. variable park position and after-wiping. When the wiper motor is replaced, it must be configured with the correct variant code to operate correctly. The existing variant code can be read in the basic data.
At every second wipe, the wiper motor moves to the bottom park position then slightly higher (variable park position). The bottom park position must be used when setting the wiper unit.
When the wiper motor control unit is being encoded, the function for the variable park position is activated and the wiper motor moves automatically to the bottom park position after the next wiper stroke.
The variable park position is activated automatically after 100 wiper strokes.
The control unit must be of the correct type to confirm encoding.
Note:
The bonnet must be closed during activation, otherwise the power supply to the wipers will be cut.
Test conditions:
Battery voltage above 12 V.
Ignition on, engine off
Bonnet closed.
Wiper motor replaced.
Read and note the existing code.
Procedure:
Select the "Encode wiper motor" function.
A dialogue box shows the current code. Press "OK" to change the code.
Enter the desired code in the displayed input field and confirm with "OK".
A dialogue box displays the new code. Confirm with "OK".
If the function fails, check the test conditions and ensure that the code is valid for the current control unit.
Exit the function and switch off the ignition within 60 seconds to store the code.
Switch on the ignition and re-establish dialogue with the vehicle. Check the trouble codes and the "variant code" parameter in the basic data for the wiper motor to ensure that the code is stored correctly.