2021-2022 Audi e-tron Key Adaptation Error TSB

Symptoms

Owners of 2021-2022 Audi e-tron vehicles may encounter issues when attempting to replace a key or purchase an additional key. During the key adaptation process, the vehicle may display specific error messages indicating a failure to properly program the key.

Fault Codes and Error Messages

When performing the vehicle immobilizer adaptation test plan, technicians may observe the following verbatim error messages:

• "FAZ1552E" Key status not valid
• "FAZ1540E Action not successful"

These messages directly indicate a problem with the key adaptation process, preventing the new key from being recognized by the vehicle's immobilizer system.

Diagnosis and Trigger Conditions

The root cause of the Audi e-tron key adaptation FAZ1552E issue is an unreliable connection between the key and the reader coil within the vehicle during the adaptation procedure. This communication breakdown prevents the successful programming of the key.

This problem typically arises when a customer is replacing an existing key or attempting to add an extra key to their vehicle's system. The error messages are triggered specifically during the vehicle immobilizer adaptation test plan within Guided Fault Finding.

Repair Procedure Summary

To resolve the Audi e-tron key adaptation FAZ1552E and FAZ1540E errors, a specific procedure involving the Electric Drive Control Module J1234 (Diagnostic Address: 0051) must be followed:

1. Fuse Removal: Before initiating the key adaptation process, technicians must remove fuse number SD5 and fuse number SD7. These fuses supply KL 15 power and KL 30 power, respectively, to the Electric Drive Control Module J1234. Diagrams in the technical service bulletin illustrate the precise locations of these fuses within the vehicle's fuse box.
2. Key Adaptation: Proceed with the vehicle immobilizer adaptation test plan in Guided Fault Finding as usual.
3. Fuse Reinstallation: Once the key adaptation process has been successfully completed, the removed fuses, SD5 and SD7, must be reinstalled.

This temporary interruption of power to the J1234 module helps to establish a stable connection for key programming.

Important Warnings

Owners should be aware that this Technical Service Bulletin (TSB) is for informational purposes only and is not applicable to any Audi warranty. This means that while the TSB provides a solution, any associated costs for diagnosis or repair may not be covered under standard warranty terms.

Owner Action

If you own a 2021-2022 Audi e-tron and are experiencing issues with key adaptation, particularly if you've seen error messages like "FAZ1552E" or "FAZ1540E", you should contact an authorized Audi service center. Describe the symptoms and mention the Audi e-tron key adaptation FAZ1552E issue. The dealership technicians are equipped with the necessary diagnostic tools and the specific instructions from TSB 57 22 98 2067882/2 to perform the correct repair procedure.

---

Source: NHTSA ID: 10226885