A VW Eos owner is experiencing issues with their roof control unit after water damage. Despite replacing the pump motor and a faulty position sensor, the roof operation remains unreliable. A new control unit from the dealer was purchased, but it has a different part number and throws a fault code for a missing roof stowed position sensor. The original unit had 12 position sensors, while models from 2009 onwards have 13. Attempts to change the soft code in the new unit to match the original using VCDS have been unsuccessful. The question remains: can this issue be resolved with VCDS, or is dealer intervention required? The fault code in the new controller persists despite matching the soft code to the original unit. This indicates a potential incompatibility between the replacement controller and the car’s existing wiring or sensor configuration.
Further investigation with VCDS may reveal specific details about the fault code, which could point to a solution. Checking measuring blocks and comparing values between the old and new control units might highlight discrepancies. Additionally, examining the wiring diagrams for both versions of the roof control unit could identify any differences in sensor connections. It’s also worth exploring online forums and resources dedicated to VW Eos and VCDS for similar cases and potential solutions. Users often share their experiences and troubleshooting tips, which could provide valuable insights.
While attempting to modify the soft code with VCDS was a logical step, it’s crucial to ensure the correct coding procedure was followed. Consulting the VCDS documentation or contacting Ross-Tech, the developers of VCDS, for specific guidance on coding the roof control unit is recommended. They may have specific instructions or insights related to this particular issue. If VCDS modifications prove insufficient, dealer intervention may be necessary. They may have access to proprietary diagnostic tools or software updates that can address the incompatibility issue.
