2021-2023 Audi e-tron Battery Charger Diagnostic Address TSB

Symptoms

Owners might not directly observe a symptom related to the diagnostic address. However, if the high-voltage battery charger control module (J1050) has been replaced in your 2021-2023 Audi e-tron, workshop technicians may find that the new unit no longer reports under its correct diagnostic address word 00C6. Instead, it reports under address word 8113 in the diagnostic scan tool.

Technical Background

This issue occurs because the replacement high-voltage battery charger control module (J1050) requires its diagnostic address or address word to be changed after installation. The new module does not automatically assume the correct address, leading to the discrepancy observed by technicians.

Repair Procedure Summary

To correct the diagnostic address for the Audi e-tron high-voltage battery charger, technicians should follow a specific procedure using a diagnostic scan tool's Guided Functions. This ensures the module communicates correctly within the vehicle's system.

1. Select the Module: Using Guided Functions, select "High-Voltage Battery Charger Control Module 2, J1239" which is identified by diagnostic address 8113.
2. Access Functions: Proceed to select the functions available for "8113 - High-Voltage Battery Charger Control Module 2."
3. Change Address: Within these functions, choose the option to "Change diagnostic address from 8113 to 00C6."
4. Run Test Plan: Execute the test plan provided by the scan tool. This action will automatically correct the diagnostic address.
5. Verify Correction: Confirm that the high-voltage battery charger control module, J1050, is now reporting correctly under address word 00C6. Also, verify that "High-Voltage Battery Charger Control Module 2, J1239" is no longer reporting under address word 8113.
6. Complete Replacement Test Plan: Finish the remaining steps of the replacement test plan for the high-voltage battery charger control module, J1050.

This procedure ensures that the Audi e-tron high-voltage battery charger functions as expected and is correctly recognized by the vehicle's diagnostic systems.

Important Notes for Owners

This Technical Service Bulletin (TSB) provides extended repair instructions for technicians. It is not intended for separate billing to customers. Any additional time required for this specific diagnostic address correction should be included within the standard GFF (Guided Fault Finding) time allocated for the original repair of the high-voltage battery charger control module.

Source: NHTSA TSB ID 10233764