Removing the speed limiter on a VW T5 Transporter can seem straightforward, but often requires more than just a VCDS cable. This guide explores the challenges and potential solutions for VW T5 speed limiter removal using VCDS.
Understanding the VW T5 Speed Limiter
Many VW T5 Transporters, especially those used commercially, come with factory-installed speed limiters set around 70 mph. While this can promote fuel efficiency and safety, it can be restrictive for some owners. VCDS (Vag-Com Diagnostic System) software, along with a compatible cable, allows access to the vehicle’s control modules, potentially offering a way to modify or remove the limiter.
Common Challenges with VCDS and Speed Limiter Removal
As highlighted in the provided autoscan, accessing and modifying certain modules, especially those related to engine control, can be problematic. The error “controller refused to send a seed, Error 7F service not supported in active session” is a common obstacle. This indicates a security access issue preventing VCDS from communicating with the engine control module (ECM) to make the necessary changes.
Several factors contribute to this:
- Security Access: Modern VW vehicles employ robust security protocols to prevent unauthorized modifications. A simple access code (like the 27971 mentioned) may be insufficient. Higher-level security access or specialized login procedures may be required.
- Software Version: The VCDS software version (21.3.0.0 in the example) might not be fully compatible with the 2018 T5’s ECM. Updating to the latest VCDS version is often recommended.
- Incorrect Procedure: The specific steps to remove the speed limiter vary depending on the engine code and ECM version. Following an incorrect procedure can result in errors or no change at all.
- ECM Coding Protection: Certain ECMs have coding protection that prevents modifications without dealer-level tools or specialized software.
Finding the Power Output
While the autoscan provides valuable information, directly determining the power output solely from the engine code (04L 906 056 KA) in the autoscan is unlikely. However, cross-referencing the engine code with VW’s official documentation or online resources dedicated to VW vehicles can provide details about the engine variant and its corresponding power output.
Potential Solutions for VW T5 Speed Limiter Removal
- Updated VCDS Software: Ensure you are using the latest version of VCDS software with updated data files.
- Advanced Security Access: Explore options for obtaining higher-level security access or login codes specific to the T5’s ECM. This may involve contacting a VW specialist or researching online forums dedicated to VCDS.
- Professional Tuning: Consult with a reputable VW tuning specialist who possesses the necessary tools and expertise to modify the ECM and remove the speed limiter safely. They often have access to dealer-level equipment and specialized software.
Conclusion
Removing the speed limiter on a 2018 VW T5 with VCDS can be challenging due to security access and potential coding complexities. While updating the VCDS software and researching correct procedures are worthwhile initial steps, seeking professional assistance from a VW tuning specialist is often the most reliable solution for safe and successful speed limiter removal. This ensures the modification is performed correctly without risking damage to the vehicle’s electronic systems. Remember to always prioritize safety and compliance with local regulations regarding vehicle modifications.
