Matching keys to your Volkswagen can be frustrating, especially when encountering issues with saving adjuster values in VCDS. This guide provides a corrected procedure for a 2002 A4 B6, using VCDS version 409.1, and addresses inaccuracies found in the Ross-Tech documentation.
Correcting the Ross-Tech Key Matching Procedure
The Ross-Tech guide for remote matching may be inaccurate for certain VCDS versions and car models. The following steps outline the correct procedure for a 2002 A4 B6 using VCDS 409.1:
Locating the Adaptation Channel
First, locate the correct adaptation channel for key matching. For the 2002 A4 B6, it’s found under 46 – Central Conv. / Adaptation / Channel 21. Other models may have this function under 35 – Centr. Locking / Adaptation / Channel 1. It’s crucial to verify the correct channel for your specific vehicle.
Initial Setup and Key Learning
Contrary to the Ross-Tech instructions, you should not save the adjuster value after adding each key. Instead, follow these steps:
- Clear Existing Entries: If necessary, delete all existing key entries by setting Channel 21 to “0” and saving.
- Increment Key Count: Increase the value in Channel 21 to “1” using the up arrow. The “Test” button will gray out as the value is automatically tested. The status should change to “Adjusting” or a similar indication.
- Learn First Key: Press and hold the unlock button on your first remote for approximately one second. The status should change to “Learned” or “Registered.” Do not save yet.
- Learn Subsequent Keys: Increment the value in Channel 21 for each additional key (e.g., “2” for the second key, “3” for the third). Press and hold the unlock button on each corresponding remote until the status changes to “Learned” or “Registered.”
Saving the Adjuster Value
Only after all keys have been learned, press the “Save” button in VCDS. This ensures all keys are properly matched to the vehicle.
Testing and Verification
After saving, test all keys to confirm they function correctly. They should lock and unlock the vehicle without issue. If problems persist, double-check the adaptation channel and repeat the procedure carefully.
Conclusion
By following this corrected procedure, you can successfully match remote keys to your Volkswagen using VCDS, even if you’ve encountered problems with saving the adjuster value. Remember to always verify the correct adaptation channel for your specific car model and VCDS version. This revised method ensures a more accurate and reliable key matching process.
