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

Symptoms

Owners of affected 2021-2023 Audi e-tron vehicles might notice several issues related to the high-voltage battery charger control module (J1050) after it has been replaced. The primary symptom is that the module cannot be started or reports under an incorrect diagnostic address.

Specifically, the new charging unit may fail to appear in the diagnostic scan tool under its correct address word 00C6, instead reporting under address word 8113. Another critical symptom is the inability to restart the high-voltage system, which may be accompanied by event memories logged in address 0019.

Fault Codes / Diagnostic Addresses

This Technical Service Bulletin (TSB) primarily refers to diagnostic addresses rather than traditional DTCs. These addresses are crucial for identifying and resolving the issue with the Audi e-tron charger module diagnostic address.

• Address 00C6: This is the expected and correct diagnostic address for the high-voltage battery charger control module, J1050.
• Address 8113: This is the incorrect diagnostic address that the J1050 module may report after being replaced.
• Address 0019: Event memories may be entered in this gateway address if the high-voltage system cannot be restarted.

Diagnosis / Trigger Conditions

The problem with the Audi e-tron charger module diagnostic address typically arises after the high-voltage battery charger control module, J1050, has been replaced due to a prior fault. After replacement, the new unit either fails to report in the diagnostic scan tool under its correct address word 00C6, or it incorrectly reports under address word 8113.

Another key indicator is the inability to restart the high-voltage system, often accompanied by event memories logged in address 0019. Technicians will verify these conditions using diagnostic tools to confirm the incorrect reporting or restart failure.

Repair Procedure Summary

The repair process for the Audi e-tron charger module diagnostic address issue varies slightly depending on the vehicle's software version.

For Software Versions 3112, 3115, or 3119 (UNECE)

1. A new high-voltage battery charging unit must be ordered.
2. Before installing the new unit, technicians must check the resistance of the charging socket(s) using a VAS 1594 tool. This involves measuring specific pins (24-60 and 41-60) on the 60-pin T-60 connector, looking for values around 2.7k Ohm or 4.7k Ohm with a +/- 5% tolerance.
3. Fuses for OBC1 (5) or OBC2 (11) from fuse carrier 1 (SR1) need to be removed before installation.
4. The new battery charger is then installed, following a specific connection sequence: electrical connectors 1 and 2 first, then connector 4 last (as illustrated in Figure 1 of the TSB).
5. The removed fuses are reinserted.
6. After installation, the charger must be activated using the workshop manual's "Guided Functions: Commissioning 00C6 - Replace control module."
7. If the onboard charger (OBC) still logs address 8113 instead of 00C6, or if the high-voltage system cannot be activated, further diagnostic steps involve ending and restarting Guided Fault Finding (GFF) if event memories are static, and working through event memory entries from gateway 0019.
8. The electrical system configuration may need updating via the self-test function, navigating through specific diagnostic addresses (0019, J533) to update technical product information.
9. If commissioning remains unsuccessful, a Technical Assistance Center (TAC) inquiry is required, ensuring a diagnostic log and specific measured values (PRX voltage at charging socket A and B) from addresses 00C6/8113 are available.

For All Other Software Versions

1. If the vehicle has PR number KB4 (onboard charging unit up to 22kW), charging unit 2 (AX5) must be disconnected first.
2. Technicians should use the self-test function to navigate to "High-Voltage Battery Charger Control Module 2, J1239 (Diagnostic address 8113)" and then select the option to change the diagnostic address from 8113 to 00C6.
3. Similar to the other software versions, if the high-voltage system cannot be activated, GFF procedures and electrical system configuration updates (via 0019 and J533) are necessary.

Required Tools or Parts

To perform the repair for the Audi e-tron charger module diagnostic address issue, specific tools are required:

• VAS 1594: This tool is a wire harness repair set, essential for checking and repairing electrical connections.
• VAS 6160/VAS 6150: These are VAS testers that must be equipped with the current version of ODIS diagnostic software.

Warranty Information

This Technical Service Bulletin (TSB 2063427/11) is informational only if the vehicle is outside of its warranty period. Warranty claims, if applicable, must adhere to the Audi Warranty Policies and Procedures Manual. Claims are subject to review and audit by Audi Warranty.

Specific labor operations and their corresponding service numbers are provided for technicians:

• Replace high-voltage charging unit: Service Number 9352 5550.
• Guided Fault Finding (GFF): Service Number 0150 0060.
• Loosen and secure high-voltage charging unit: Service Number 9352 0999.
• GFF for other software versions without charging unit 2 (AX5): Service Number 0150 0010.

Source: NHTSA TSB ID 11017673