Wiper Motor: Testing and Inspection

Wiper Motor APP Functions, Deactivating Starting 11.07

Special tools, testers and auxiliary items required

• Vehicle Diagnosis, Testing and Information System (VAS 5051A)

The windshield wiper system has been equipped with Alternating Park Position function ( APP) since 11.07.

The APP function causes the wiper at every second wiper shut off to move upward slightly after reaching the lowest position.

To install the motor crank on the wiper motor and wiper arm, it is necessary to shut off the motor in the lowest park position. To ensure this, APP function must be deactivated.

• An activation of APP function is not possible.

• APP function is automatically activated after 100 wiping cycles. This applies to wiper motors in which the APP function was deactivated as well as for new wiper motors.

- Connect (VAS 5051A).

- In (VAS 5051A) , select operating mode "Guided Fault Finding".

- Using the "Go To" button, select "Functions/Component selection" and the following menu options in sequence:

• Body

• Electrical Equipment

• 01 - On Board Diagnostic (OBD) capable systems

• Vehicle Electrical System Control Module

• Functions of Vehicle Electrical System Control Module

• Coding control module for wiper electronics/deactivating APP

- Read out the current coding and note the value.

- Code the control module with the read-out value.

• The read-out value can vary from the input options for the new code in the number of characters. This is insignificant and has no effect upon the function of the wiper system. The new coding only resets the wipe cycle counter to zero.