2022-2024 Audi e-tron GT Lane Departure Warning Fault TSB

Owners of 2022-2024 Audi e-tron GT and RS e-tron GT vehicles may encounter a "Lane departure warning fault" message appearing in the instrument cluster upon vehicle startup. This issue is linked to specific diagnostic trouble codes (DTCs) stored in the steering control unit, J500.

This Technical Service Bulletin (TSB) 48 23 52 2071085/1 outlines a software-related problem within the J500 control unit that causes this warning. Fortunately, an improved software version is available to address this concern.

Symptoms

If your 2022-2024 Audi e-tron GT or RS e-tron GT is affected, you will typically observe the following:

• A message stating "Lane departure warning fault" appears in the vehicle's cluster when the vehicle is started.

Fault Codes / DTCs

When diagnosing the "Audi e-tron GT lane departure warning fault", technicians will find the following DTCs logged in the steering control unit (J500), address word 0044:

Code	Description	Module
U13D500	Function restriction, directional stabilization assistance	J500 steering control unit
C135DF1	Power steering control module does not implement request	J500 steering control unit

Technical Background

The root cause of the "Audi e-tron GT lane departure warning fault" and the associated DTCs U13D500 and C135DF1 is a software issue within the J500 control unit. Audi has identified this internal software problem and developed a solution.

Repair Procedure Summary

The repair for this issue involves updating the software of the J500 control unit. This is performed using the Software Version Management (SVM) system.

1. Review SVM Instructions: Technicians must first follow all instructions detailed in TSB 2011732, which covers general SVM operating procedures.
2. Software Update: The J500 control unit (address 0044) needs to be updated using the SVM action code 44A039. The new software version is 0450 or higher, replacing the old software version 0430, for part number 9J1907445.

Improved software has been integrated into production vehicles since June 27, 2022.

Warranty Information

This TSB 48 23 52 2071085/1 outlines specific warranty claim types and conditions:

• Standard Warranty: Applicable for vehicles up to 48 months or 50,000 miles.
• CPO Vehicles: For Certified Pre-Owned (CPO) vehicles, use claim type G10 and verify owner eligibility.
• Service Number: 4835
• Damage Code: 0040
• Diagnostic Time: GFF 0150 0000, with time stated on the diagnostic protocol (maximum 50 TU).
• Road Test: No allowance for road tests before or after the service procedure (0 TU).
• Claim Comment: As per TSB 2071085/1.

All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to audit.

Important Warnings

• If your vehicle is outside of its warranty period, this Technical Service Bulletin is provided for informational purposes only. Owners of vehicles outside warranty should consult with their dealer regarding potential costs for this software update.

NHTSA ID: 10240146