2019-2026 Audi Driver Assist System Fault TSB 2074688/1

Symptoms of Driver Assist System Malfunction

Owners of various 2019-2026 Audi models may experience an Audi e-tron driver assist fault, particularly after passing through a toll booth or during heavy traffic. The issue is often sporadic and difficult to reproduce. When this occurs, one or more of the following messages may appear in the instrument cluster:

• "Parking aid: fault. Obstacles cannot be detected"
• "Maneuver assist: fault. Please contact workshop."
• "Rear cross-traffic assist: currently unavailable. See owner's manual."

Fault Codes (DTCs)

When the Audi e-tron driver assist fault occurs, technicians may find specific Diagnostic Trouble Codes (DTCs) stored in various control units, often with almost identical timestamps (differing by up to 5 seconds). These codes indicate a communication or data bus error within the driver assist systems.

DTC	Description	Symptom Number	Control Unit
U111000	Function restriction due to communication interruption	6922, 7178	J794 (Information Electronics control unit)
U112300	Data bus error value received	2114053	J1121 (Driver assist systems control unit)
U112300	Data bus error value received	1191978, 452352	J769 (Lane change assist control unit, with PR# 7Y1)

Technical Background

Audi has identified that the root cause of the Audi e-tron driver assist fault and associated DTCs (U111000, U112300) is a software issue. An optimized target data container for the J1121 driver assist systems control unit, with software version 0510, was implemented in production starting week 48/2024 to address this problem.

Repair Procedure Summary

Technical Service Bulletin (TSB) 2074688/1 outlines a software update procedure to resolve the Audi e-tron driver assist fault. Before proceeding, technicians must check the current software version of the J1121 driver assist systems control unit (diagnostic address 00A5) and the vehicle's model year.

The general software update steps involve using the ODIS tester:

1. Change Communication Method: Set the communication method to "DoIP" (Diagnostic over Internet Protocol) by navigating to Admin > General > GFS Process and selecting "Only allow DoIP communication."
2. Initiate Flash: Select the "flash" function within the ODIS tester.
3. Enter SVM Code: Choose "SVM code input."
4. Perform Software Update: Execute the software update using SVM code FASISKD6A002. This process can take approximately 15 to 100 minutes, depending on the vehicle's equipment.

Specific instructions vary slightly by model year and existing software version:

• MY 2019/2020 with software version 0365: An update of the target data container for the J1121 control unit is available. Technicians should perform the "Check Control Module Configuration" test plan using the ODIS tester.
• MY 2021/2022/2023 with software versions 0364, 0365, 0371, 0381, 0383: A comprehensive software update, including the target data container for the J1121 control unit, is available. The general ODIS tester steps mentioned above should be followed.
• MY 2023 with software version 0384: An update of the target data container for the J1121 control unit is available. Similar to MY 2019/2020, the "Check Control Module Configuration" test plan should be performed.

Important Warnings

• Pre-Service Check: Always verify the software version of the J1121 driver assist systems control unit and the vehicle's model year before attempting any service measures described in TSB 2074688/1.
• DoIP Communication: If the message "Should the entered SVM code be accepted or the vehicle connection be changed?" appears during the update, it is crucial to double-check that vehicle access is set to DoIP. If not, change it to DoIP by selecting "3. Change vehicle access (CAN, DoIP, CANFD)" on the ODIS tester.
• Model Year 2024: For Model Year 2024 vehicles with software versions 0394 or 0502, Audi indicates that a solution is not expected to be available before the end of the first quarter of 2025.

Warranty Information

For vehicles still under warranty, claims for this repair should be submitted in accordance with the Audi Warranty Policies and Procedures Manual. If the vehicle is outside of its warranty period, this Technical Service Bulletin (Service Number 9093) serves as informational guidance only. The damage code for this issue is 0039.

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Source: NHTSA ID: 11005927