2021-2023 Audi e-tron High-Voltage Charger Module Address Issue

Symptoms

Owners might notice that after the high-voltage battery charger control module, identified as J1050 (address word 00C6), has been replaced due to a fault, the new unit no longer reports its diagnostic data under the expected address word 00C6. Instead, it incorrectly reports under address word 8113 in the diagnostic scan tool. This incorrect reporting can lead to the high-voltage system failing to activate properly.

Diagnosis / Trigger Conditions

This issue specifically arises after the J1050 module has been replaced. The core problem is that the replacement part requires its diagnostic address or address word to be changed to function correctly within the vehicle's system. Technicians will use the ODIS diagnostic system to identify the incorrect address reporting and follow specific test plans, particularly if the high-voltage system cannot be activated.

Repair Procedure Summary

Audi Technical Service Bulletin 93 24 54 2063427/6 outlines the steps for technicians to resolve the incorrect diagnostic address reporting for the Audi e-tron charger module address issue. The procedure varies slightly depending on the vehicle's software version.

For vehicles with software versions 3112 or 3115 (=UNECE):

1. A new charging unit for the high-voltage battery must be ordered.
2. Before installing the new battery charger, technicians must check the resistance of the charging socket(s). This involves using a VAS 1594 tool to measure specific pins (24-60 and 4-61) on the 60-pin plug of the battery charger to the electrical system. The expected resistance values are approximately 2.7k Ohm or 4.7k Ohm, with a tolerance of +/- 5%.
3. The battery charger is then installed, ensuring the correct connection sequence is followed. Electrical connectors -1- and -2- must be connected first, with connector -4- connected last.
4. After installation, the battery charger must be activated using the workshop manual's Guided Functions, specifically