The Brake Disc Wiper (BDW) function, designed to improve braking performance in wet conditions, can sometimes contribute to premature brake pad wear. This article explores how to disable the BDW function on a Volkswagen Golf Mk VI using VCDS (Vag-Com Diagnostic System). We’ll walk through the process of accessing the ABS controller module and attempting to modify the adaptation channel responsible for BDW activation.
Understanding the Brake Disc Wiper (BDW)
The BDW function automatically applies light brake pressure when the windshield wipers are activated in the high or continuous setting. This action is intended to clear water and debris from the brake discs, ensuring optimal braking performance. However, in certain climates with frequent rainfall, this constant activation can lead to accelerated brake pad wear.
Disabling BDW with VCDS: A Case Study
A Volkswagen Golf Mk VI owner experiencing unusually rapid front brake pad wear sought to disable the BDW function. After consulting with a fellow enthusiast, they used VCDS to access the ABS controller module.
Accessing the ABS Module:
The user navigated to the following within VCDS:
- Select: ABS Brakes
- Go to: Adaptation
- Choose: BDW from the dropdown menu
The initial value for BDW was “1,” indicating that the function was active.
Attempting to Deactivate BDW:
The user attempted to disable the BDW by changing the value to “0” and saving the change. While VCDS accepted the new value initially, upon re-opening the adaptation channel, the value reverted back to “1.” Various attempts to solidify the change, such as turning the ignition off and on, and even locking the vehicle, proved unsuccessful.
Challenges and Potential Solutions:
The inability to permanently change the BDW adaptation value suggests potential underlying factors. Possibilities include:
- Coding Protection: The ABS module might have coding protection enabled, preventing unauthorized modifications.
- Software Version: The specific VCDS software version or the ABS module’s firmware could be incompatible with the desired modification.
- Alternative Coding Methods: Disabling BDW might require a different approach beyond simply changing the adaptation value, potentially involving long coding modifications within the ABS module.
Further Investigation and Resources
To resolve this issue, further investigation is necessary. Consulting official VW documentation, online forums dedicated to VCDS and VW coding, or contacting a knowledgeable VCDS specialist could provide the necessary information.
Conclusion: The Importance of Proper Coding Procedures
Disabling the Brake Disc Wiper function on a VW Golf Mk VI using VCDS can be more complex than simply changing an adaptation value. Understanding potential coding restrictions and utilizing the correct procedures are crucial for successful modification. This case highlights the need for thorough research and potentially seeking expert advice when dealing with vehicle coding. Always exercise caution when modifying vehicle settings and ensure you have a full understanding of the potential implications.
