2021 Audi e-tron Battery Charger Diagnostic Address TSB

Owners of certain Audi e-tron models may encounter a specific issue after the high-voltage battery charger control module, known as J1050, has been replaced. This technical service bulletin (TSB) from Audi, identified as 93 21 52 2063427/1 and issued on June 3, 2021, addresses a condition where the new module reports under an incorrect diagnostic address, hindering proper vehicle communication.

This TSB is crucial for ensuring that the Audi e-tron battery charger address is correctly configured after a component replacement, preventing potential diagnostic and operational discrepancies. The bulletin applies to 2020-2021 Audi e-tron quattro and Audi e-tron Sportback vehicles.

Symptoms

If the high-voltage battery charger control module (J1050) in your Audi e-tron has recently been replaced due to a fault, you might experience an unusual diagnostic behavior. The primary symptom is observed during workshop diagnostics:

• The newly installed high-voltage battery charger control module, J1050, no longer appears in the diagnostic scan tool under its correct address word, 00C6.
• Instead, the module reports under an incorrect diagnostic address, 8113.

This discrepancy in the Audi e-tron battery charger address indicates a communication issue that needs to be resolved for the vehicle's electrical system to function as intended.

Fault Codes / Diagnostic Addresses

While this TSB does not list traditional DTCs (Diagnostic Trouble Codes), it highlights specific diagnostic address words that are central to the problem:

• 00C6: This is the correct and expected diagnostic address for the high-voltage battery charger control module, J1050.
• 8113: This is the incorrect diagnostic address under which the replacement module may report.

The issue stems from the replacement part needing its diagnostic address changed to properly integrate with the vehicle's system.

Diagnosis / Trigger Conditions

This condition specifically arises after the high-voltage battery charger control module, J1050, has been replaced. The vehicle's diagnostic system expects the J1050 module to communicate via address 00C6. When a new module is installed and defaults to address 8113, it creates a conflict that technicians will identify during a scan.

Repair Procedure Summary

Audi has outlined a specific service procedure to correct the Audi e-tron battery charger address issue using a diagnostic scan tool and Guided Functions. The steps involve reconfiguring the diagnostic address of the replacement module:

1. Select the Module: Technicians must first select the "High-Voltage Battery Charger Control Module 2, J1239" which is reporting under diagnostic address 8113 within the diagnostic scan tool's Guided Functions.
2. Access Functions: Navigate to the specific functions available for the 8113 - High-Voltage Battery Charger Control Module 2.
3. Change Diagnostic Address: Execute the function to change the diagnostic address from 8113 to 00C6.
4. Run Test Plan: After initiating the change, run the test plan. The scan tool 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, and that the high-voltage battery charger control module 2, J1239, is no longer reporting under address word 8113.
6. Complete Replacement Test Plan: Finish any remaining steps in the replacement test plan for the high-voltage battery charger control module, J1050.

Important Warranty Information

Audi specifies that this Technical Service Bulletin provides extended repair instructions and should not be used for separate billing. Any extra time required to perform this diagnostic address correction should be included within the standard GFF (Guided Fault Finding) time allocated for the original repair that necessitated the high-voltage battery charger control module replacement.

Additional Information

All part and service references, including the TSB number 2063427, are subject to change. Technicians are advised to consult their Parts Department and/or ETKA for the latest information and parts bulletins. It is also recommended to check the Repair Manual for specific fasteners, bolts, nuts, and screws that may require replacement during the repair process.

NHTSA ID: 10197966