2021-2022 Audi e-tron Wrong Battery Charger Address TSB

Symptoms

Owners of 2021-2022 Audi e-tron vehicles may encounter an issue after the high-voltage battery charger control module, identified as J1050, has been replaced due to a fault. The primary symptom is that the newly installed J1050 module no longer reports correctly in the diagnostic scan tool. Instead of appearing under its intended address word 00C6, it incorrectly shows up under address word 8113.

This discrepancy in diagnostic addresses can hinder proper vehicle diagnostics and potentially affect the functionality or monitoring of the high-voltage charging system. The Audi e-tron wrong diagnostic address prevents technicians from accurately communicating with the module.

Diagnosis / Trigger Conditions

This specific issue is triggered solely after the high-voltage battery charger control module (J1050) has been replaced. When a technician attempts to perform diagnostic scans or functions on the vehicle subsequent to the replacement, they will find that the J1050 module is not accessible at its standard address (00C6). Instead, the diagnostic tool will indicate its presence at address 8113.

This condition confirms that the replacement part requires a diagnostic address correction. The TSB clarifies that the replacement module itself needs to have its diagnostic address updated to match the vehicle's system expectations.

Repair Procedure Summary

To resolve the Audi e-tron wrong diagnostic address issue, technicians must follow a specific guided function sequence using a diagnostic scan tool. The procedure focuses on re-establishing the correct communication address for the high-voltage battery charger control module, J1050.

Here's a summary of the steps:

1. Select Control Module: Access the diagnostic scan tool and select the "High-Voltage Battery Charger Control Module 2, J1239," which is currently reporting under diagnostic address 8113.
2. Access Functions: Navigate to the functions available for the 8113 - High-Voltage Battery Charger Control Module 2.
3. Change Address: Initiate the function to change the diagnostic address from 8113 to 00C6.
4. Run Test Plan: Execute the diagnostic test plan to apply the address change.
5. Verify Correction: Confirm that the high-voltage battery charger control module, J1050, now reports correctly under address word 00C6. Simultaneously, verify that the High-Voltage Battery Charger Control Module 2, J1239, is no longer reporting under address word 8113.
6. Complete Replacement Test Plan: Finalize the replacement test plan for the high-voltage battery charger control module, J1050.

This process ensures that the module communicates properly with the vehicle's other systems and diagnostic tools.

Important Warnings

This Technical Service Bulletin (TSB 2063427/3) provides extended repair instructions for a specific diagnostic correction. It is not intended for separate billing. Any additional time required to perform this diagnostic address change should be included within the existing GFF (Guided Fault Finding) time allocated for the original repair that necessitated the replacement of the J1050 module.

Owner Action

If you own a 2021-2022 Audi e-tron and have recently had the high-voltage battery charger control module (J1050) replaced, it is advisable to ensure that this diagnostic address correction has been performed. While this issue primarily affects diagnostic communication rather than immediate vehicle operation, proper module addressing is crucial for accurate system monitoring and future serviceability.

Contact your authorized Audi dealership if you suspect your vehicle may be experiencing this Audi e-tron wrong diagnostic address issue or if you have any concerns regarding a recent high-voltage battery charger module replacement. They have the necessary diagnostic tools and expertise to perform the procedure outlined in TSB 2063427/3.

Source: NHTSA ID 10230845