2021-2025 Audi e-tron Wrong Diagnostic Address TSB

Symptoms of an Incorrect Diagnostic Address

Owners may notice an issue after the high-voltage battery charger control module, identified as J1050, has been replaced in their Audi e-tron. The primary symptom is that the newly installed J1050 module, which should report under address word 00C6, instead appears in the diagnostic scan tool under a different address, specifically address word 8113. This indicates an Audi e-tron wrong diagnostic address for the critical charging component.

This discrepancy means the vehicle's diagnostic system is not correctly recognizing the new module. Technicians attempting to diagnose or interact with the J1050 module will find it missing from its expected location (00C6) and instead discover a module, J1239, reporting at address 8113. This can hinder proper vehicle diagnostics and functionality related to the high-voltage battery charging system.

Diagnosis and Trigger Conditions

The condition of an Audi e-tron wrong diagnostic address specifically arises after the high-voltage battery charger control module (J1050) has been replaced due to a prior fault. The new replacement part requires its diagnostic address to be correctly configured. If this configuration is not performed or fails, the module will report under the incorrect address word 8113 (as J1239) instead of the correct 00C6 (as J1050).

This issue is not a malfunction of the replacement module itself, but rather a misconfiguration of its diagnostic address within the vehicle's system. It is crucial for technicians to be aware of this potential address change when performing diagnostics after a J1050 replacement.

Repair Procedure Summary

To resolve the Audi e-tron wrong diagnostic address issue, a specific procedure must be followed using a diagnostic scan tool and its Guided Functions. This process ensures the high-voltage battery charger control module is correctly recognized by the vehicle's system.

1. Access Guided Functions: Using the diagnostic scan tool, navigate to the Guided Functions menu.
2. Select Control Module: Choose the "High-Voltage Battery Charger Control Module 2, J1239" which is currently reporting at Diagnostic address 8113.
3. Change Diagnostic Address: Within the functions for J1239 (address 8113), select the option to change the diagnostic address from 8113 to 00C6.
4. Run Test Plan: Execute the diagnostic test plan. The scan tool will automatically correct the diagnostic address during this step.
5. Verify Correction: After the test plan completes, confirm that the high-voltage battery charger control module, J1050, is now reporting correctly under address word 00C6. Simultaneously, verify that the module J1239 is no longer reporting under address word 8113.
6. Complete Replacement Test Plan: Finish the overall replacement test plan for the high-voltage battery charger control module, J1050.

This procedure effectively re-assigns the correct diagnostic address to the newly installed module, allowing it to function and be recognized as intended.

Important Information for Owners

Owners should be aware that this Technical Service Bulletin (TSB) provides extended repair instructions for a specific diagnostic address issue. It is intended to guide technicians in resolving the problem efficiently. Importantly, this TSB should not be used for separate billing. Any extra time required to perform this diagnostic address correction should be included within the original repair time for the high-voltage battery charger control module replacement. This implies that if your vehicle is still under warranty or if the initial module replacement is covered, this diagnostic address correction should also be covered without additional charges. Always confirm warranty coverage with your authorized Audi service center.

Source: NHTSA ID: 10246205