2022-2026 Audi Driver Assist System Faults (DTC U111000, U112300)

Audi has issued Technical Service Bulletin (TSB) 90 24 38 2074688/2 to address a software-related issue affecting the driver assist systems in various 2022-2026 Audi models. This TSB supersedes bulletin Group 90 number 24-16, dated July 27, 2024, and provides updated software versions and service measures.

This Audi driver assist fault can lead to malfunctions in the parking aid, maneuver assist, and rear cross-traffic assist features. Owners may notice specific warning messages displayed in the instrument cluster, indicating a problem with these critical safety systems.

Symptoms

Owners of affected Audi vehicles may experience one or more of the following issues, particularly after passing through a toll booth or during heavy traffic:

• The parking aid system is not working, accompanied by the instrument cluster message: "Parking aid: fault. Obstacles cannot be detected".
• The maneuver assist system is not working, with the instrument cluster displaying: "Maneuver assist: fault. Please contact workshop."
• The rear cross-traffic assist system is not working, and the instrument cluster shows: "Rear cross-traffic assist: currently unavailable. See owner's manual."

These symptoms typically occur sporadically and may be difficult for a workshop to reproduce without specific diagnostic steps.

Fault Codes / DTCs

When these driver assist system malfunctions occur, the following Diagnostic Trouble Codes (DTCs) may be stored in various control units, often with almost identical time stamps (within 5 seconds of each other):

Control Unit	DTC Code	Symptom	Description
Information Electronics -J794- (address 005F)	U111000	6922	Function restriction due to communication interruption
Information Electronics -J794- (address 005F)	U111000	7178	Function restriction due to communication interruption
Driver assist systems -J1121- (address 00A5)	U112300	2114053	Data bus error value received
Lane change assist -J769- (address 003C) (PR# 7Y1)	U112300	1191978	Data bus error value received
Lane change assist -J769- (address 003C) (PR# 7Y1)	U112300	452352	Data bus error value received

Diagnosis / Trigger Conditions

The root cause of this Audi driver assist fault is identified as a software issue within the driver assist systems control unit (J1121). The problem manifests as communication interruptions or data bus errors, leading to the observed system failures.

Important Warnings

Repair Procedure Summary

The repair involves updating the software and target data container for the driver assist systems control unit -J1121- (diagnostic address 00A5) using the ODIS tester. The specific steps vary slightly depending on the vehicle's model year and current software version.

For MY 2019/2020 vehicles with software version 0365, an update to the target data container is available. Technicians must perform the "Check Control Module Configuration" test plan for the J1121 control unit using the ODIS tester.

For MY 2021/2022/2023 vehicles with software versions 0364, 0365, 0371, 0381, or 0383, a comprehensive software update is required. This includes updating the target data container for the J1121 control unit. Technicians must first ensure the communication method is set to "DoIP" via the ODIS tester's Admin > General > GFS Process menu, selecting "Only allow DoIP communication." Then, they proceed with a software flash, selecting "SVM code input" and using the SVM code FASISKD6A002. This update can take approximately 15-100 minutes.

For MY 2021/2022/2023 vehicles with software version 0384, an update to the target data container for J1121 is available. The "Check Control Module Configuration" test plan should be performed using the ODIS tester.

For MY 2024 vehicles with software version 0394, the J1121 control unit needs to be updated using SVM in "Flash" mode on the ODIS tester. The SVM code for this update is A5A019.

Finally, for MY 2024/2025 vehicles with software version 0502, an update to the target data container for J1121 is available. Similar to earlier models, the "Check Control Module Configuration" test plan should be performed with the ODIS tester.

Required Tools or Parts

• ODIS Tester: Essential for diagnostic procedures and software updates.
• SVM Codes: FASISKD6A002 (for MY 2021-2023 with specific software versions) and A5A019 (for MY 2024 with software version 0394) are required for software updates.

Owner Action

If you are experiencing an Audi driver assist fault with your 2022-2026 Audi, particularly if you see the warning messages mentioned or have stored DTCs U111000 or U112300, it is recommended to visit an authorized Audi service facility. This TSB provides the necessary instructions for technicians to diagnose and resolve the issue through a software update. Warranty claims for this service are processed under Service Number 9093 and Damage Code 0039, referencing TSB 2074688/2.

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Source: NHTSA ID: 11009954