If your Volkswagen MK5 key fob isn’t working correctly, VCDS (Vag-Com Diagnostic System) can help you reprogram it. This guide will walk you through the process of using VCDS to program a new or replacement key fob for your MK5. A common scenario is accidental water damage to the key fob. After drying and replacing the battery, the car horn might sound continuously when pressing any button. This indicates a need for reprogramming. This guide addresses the specific issue of the “Save” button not enabling in VCDS during the key fob programming process.
Common Key Fob Programming Issues with VCDS
Using VCDS to program a new key fob involves specific steps within module 46 – Convenience. One frequent problem encountered is the inability to save the new coding after entering the required values. The “Test” button becomes active, prompting a 5-minute wait for the “Save” button to enable, but it often remains inactive. This can be frustrating, especially when following the official Ross-Tech guides. This article addresses this specific issue and provides potential solutions.
Troubleshooting the VCDS Save Button Issue
Several factors can contribute to the “Save” button not activating. Here’s a breakdown of common causes and potential solutions:
Software Version and Compatibility
Ensure you’re using the latest version of VCDS. Older versions might have compatibility issues with certain MK5 models. Updating to the newest release often resolves these problems. Check the Ross-Tech website for the most recent version and update instructions.
Correct Procedure
Double-check each step in the Ross-Tech key programming guide for module 46. Even a minor deviation from the procedure can prevent the “Save” button from enabling.
- Ignition ON: Confirm the ignition is in the “ON” position, not just “ACC.”
- Channel Selection: Verify you’ve selected the correct channel (01) for key programming.
- New Value: Ensure you’ve entered the correct “New Value” (2) to learn new keys.
- Timing: After clicking the “Test” button, allow the full 5 minutes for the “Save” button to become active. Don’t interrupt the process.
Controller Communication
Occasionally, communication issues between VCDS and the convenience module can hinder the saving process. Try closing the controller in VCDS and restarting the procedure. Unplugging and reconnecting the VCDS cable can also help establish a stable connection.
Key Placement
Although not directly related to the “Save” button issue, ensure the new key fob battery is properly installed and the key is correctly inserted into the ignition if required by the procedure.
Further Troubleshooting
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If the “Save” button remains inactive after trying these steps, consider:
- Checking for Fault Codes: Scan for fault codes in module 46 using VCDS. Existing errors could interfere with key programming. Address any found codes before attempting to program the key again.
- Consulting Ross-Tech Support: If all else fails, reach out to Ross-Tech directly for expert assistance. They have extensive knowledge of VCDS and can offer specific guidance for your situation.
By systematically troubleshooting these potential issues, you can successfully program your new key fob using VCDS and get back on the road. Remember to always refer to the official Ross-Tech documentation for the most accurate and up-to-date instructions.
