2021-2023 Audi e-tron HV Charger Module Diagnostic Address Issue TSB

Owners of 2021-2023 Audi e-tron and e-tron Sportback vehicles may encounter a specific issue related to the high-voltage battery charger control module. This Technical Service Bulletin (TSB 2063427/12) outlines the diagnostic and repair procedures for instances where the charger control module reports an incorrect diagnostic address after being replaced.

Symptoms

Vehicle owners might experience issues indicating a fault with the high-voltage battery charger control module, J1050, requiring its replacement. After the replacement, technicians may observe that the new unit no longer reports under its correct diagnostic address 00C6 in the diagnostic scan tool.

Instead, the module reports under diagnostic address 8113. A critical symptom is that the high-voltage system cannot be restarted, often accompanied by event memories logged in diagnostic address 0019.

Diagnosis / Trigger Conditions

The core of the problem lies in the replacement high-voltage battery charger control module needing its diagnostic address or address word changed. This is a crucial step that, if missed, leads to the module reporting incorrectly and the high-voltage system failing to activate.

This condition is specifically noted after the J1050 module has been replaced due to a prior fault. The Audi e-tron HV charger diagnostic address issue prevents proper communication and functionality of the charging system.

Repair Procedure Summary

Audi has issued TSB 2063427/12 to address the Audi e-tron HV charger diagnostic address problem. The repair procedure involves several steps, varying slightly based on the vehicle's software version (3112, 3115, or 3119) or other software versions.

For vehicles with software versions 3112, 3115, or 3119, the process begins with ordering a new high-voltage battery charging unit. Before installation, technicians must check the charging socket resistances using tool VAS 1594 on specific pins of the T60 connector. Fuses for OBC 1 and OBC 2 must be removed, and the 12V battery disconnected before installing the new charging unit.

After installation, the charging unit must be activated using the Workshop Manual's guided functions for commissioning. If the module still logs diagnostic address 8113 instead of 00C6, further diagnostic steps are required, including working through event memory entries from gateway 0019 and potentially updating the electrical system configuration via J533 technical product information (2063053).

For all other software versions, the procedure involves using ODIS to change the diagnostic address from 8113 to 00C6, specifically targeting the High-Voltage Battery Charger Control Module 2 -J1239-. If the high-voltage system still cannot be activated, similar diagnostic and configuration update steps are followed.

Required Tools or Parts

Technicians will need specific tools to perform the repair outlined in TSB 2063427/12:

• VAS 1594: A wire harness repair set, used for measuring resistances.
• VAS 6160/VAS 6150: A VAS tester equipped with the current version of ODIS (Windows 10) for diagnostics and programming.

Specific part numbers for the high-voltage charging unit are not provided in the TSB but would be obtained through standard Audi parts channels. Labor operations include replacing the high-voltage charging unit (9352 5550) and loosening/securing the earth strap (9785 0950).

Owner Action

If you own a 2021-2023 Audi e-tron or e-tron Sportback and experience issues with your high-voltage charging system, especially after a charger control module replacement, it is recommended to contact your authorized Audi dealership. Inform them about the symptoms you are experiencing, such as the high-voltage system not restarting, and mention TSB 2063427/12. Your dealer can diagnose the Audi e-tron HV charger diagnostic address issue and perform the necessary repairs. Warranty claims for this issue are subject to review by Audi Warranty, and if the vehicle is outside of warranty, this information is for informational purposes only.

Source: NHTSA ID 11025244