2021-2023 Audi Models Active Lane Assist Malfunction TSB

Owners of various 2021-2023 Audi models may encounter warning messages related to the Active Lane Assist or Traffic Jam Assist systems. These messages are typically accompanied by a diagnostic trouble code (DTC) U112300, indicating a communication error within the vehicle's driver assistance systems. This Technical Service Bulletin (TSB 2061932/4) outlines the diagnostic steps and repair procedures for addressing this specific issue.

Symptoms

Owners will observe one of the following malfunction indications displayed in the instrument cluster:

• "Audi Active Lane Assist: malfunction!"
• "Traffic Jam Assist: malfunction!"

These messages suggest that the system responsible for lane keeping or traffic assistance is not functioning correctly, potentially impacting driver comfort and safety features.

Fault Codes / DTCs

When the Audi Active Lane Assist malfunction occurs, technicians may find one or more of the following DTCs stored in the vehicle's control modules:

Code	Description	Module	Symptom Code
U112300	Databus error value received	Front camera, R242 (address word 00A5)	1123220
U112300	Databus error value received	Distance regulation control module, J428 (address word 0013)	2153

These codes specifically point to a communication error related to the capacitive steering wheel, which is crucial for the proper operation of these driver assistance systems.

Technical Background

Many 2021-2023 Audi vehicles are equipped with a "capacitive steering wheel." This advanced steering wheel features capacitive touch sensors designed to detect the driver's hands. Its primary purpose is to ensure the driver is actively engaged and paying attention while using driver assist features like Active Lane Assist and Traffic Jam Assist. A malfunction in this system can trigger the Audi Active Lane Assist malfunction warning.

Important Warnings

This TSB involves working with pyrotechnic components, specifically airbags. It is critical to follow all safety precautions and steps detailed in the ElsaPRO repair manual under "Airbag Unit with Igniter, Removing and Installing" to prevent accidental deployment or injury.

Repair Procedure Summary

The repair procedure focuses on inspecting and potentially replacing the capacitive steering wheel if a malfunction is detected. The general steps are as follows:

1. Inspect Steering Wheel: Carefully examine the steering wheel for any external or mechanical damage, such as deep scratches. Such damage might indicate external influence and may not be covered under warranty.
2. Remove Airbag: Safely remove the airbag from the steering wheel, adhering strictly to the safety guidelines for handling pyrotechnic components.
3. Check Wiring: Verify that all visible wiring on the steering wheel is in good condition and that all connectors are securely fastened.
4. Steering Wheel Replacement: If no obvious external or mechanical damage is found after the initial inspection and wiring check, the steering wheel should be replaced to resolve the underlying issue causing the Audi Active Lane Assist malfunction.

Required Tools or Parts

Technicians will need to consult ETKA (Electronic Parts Catalog) and ELSA (Electronic Service Information System) for the most current information on parts and tools. Specific items that may be required include:

• Fasteners, Bolts, Nuts, and Screws: As needed per the repair manual.
• Steering Wheel: If replacement is necessary, one new steering wheel (part number to be determined via ETKA).

Warranty Information

This repair may be covered under warranty, depending on the vehicle's age and mileage. The following claim types and codes are relevant:

• Claim Type: 110 (up to 48 Months/50,000 Miles) or G10 (for CPO Covered Vehicles – owner verification required).
• Service Number: 4810.
• Damage Code: 0040.
• Labor Operations:
  • Driver airbag unit remove + reinstall (included in labor op 4810 1900 if steering wheel is replaced): 6958 1900.
  • Inspecting steering wheel for damage: 4810 1999 (5 TU).
  • Steering wheel remove + reinstall (if required, do not claim 6958 1900 if this op is claimed): 4810 1900.
• Diagnostic Time: GFF 0150 0000 (Time stated on the diagnostic protocol, Max 15 TU).

If the vehicle is outside of warranty, this Technical Service Bulletin serves as informational guidance only. All warranty claims must comply with the Audi Warranty Policies and Procedures Manual.

Owner Action

If you experience the "Audi Active Lane Assist: malfunction!" or "Traffic Jam Assist: malfunction!" message in your 2021-2023 Audi, it is recommended to schedule an appointment with an authorized Audi service center. They have the specialized tools and training to diagnose the DTC U112300 and perform the necessary repairs, ensuring your driver assistance systems function correctly.