2021-2023 Audi Active Lane Assist Malfunction TSB U112300

Symptoms

Owners of 2021-2023 Audi vehicles may observe one of the following malfunction indications displayed in the instrument cluster:

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

These messages indicate a potential issue with the vehicle's driver assistance systems, specifically related to the capacitive steering wheel.

Fault Codes / DTCs

When these symptoms occur, diagnostic scans may reveal one or more of the following Diagnostic Trouble Codes (DTCs) stored in the vehicle's control modules:

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

The DTC U112300 in the front camera module is associated with symptom code 1123220, while the same DTC in the distance regulation control module is associated with symptom code 2153.

Technical Background

Many 2021-2023 Audi vehicles are equipped with a "capacitive steering wheel." This steering wheel incorporates capacitive touch sensors designed to detect the driver's hands on the wheel. This system is crucial for ensuring the driver is paying attention when using various driver assist features like Active Lane Assist and Traffic Jam Assist. A malfunction in this system can lead to the "Audi e-tron Active Lane Assist malfunction" message.

Diagnosis and Repair Procedure

If your 2021-2023 Audi displays the "Audi Active Lane Assist: malfunction!" message or stores DTC U112300, technicians should follow a specific diagnostic and repair process. The procedure focuses on identifying and rectifying issues with the capacitive steering wheel:

1. Inspect Steering Wheel: The technician will first visually inspect the steering wheel for any exterior or mechanical damage, such as deep scratches. Such damage might indicate external influence and may not be covered under warranty.
2. Airbag Removal: If no obvious damage is found, the airbag from the steering wheel must be carefully removed. This step requires strict adherence to safety precautions.
3. Wiring Inspection: All visible wiring on the steering wheel will be checked to ensure it is in good condition and that all connectors are properly secured.
4. Steering Wheel Replacement: If, after completing the inspections and checks, no obvious damage is found, the steering wheel should be replaced to resolve the underlying issue causing the Audi e-tron Active Lane Assist malfunction.

Required Tools or Parts

Technicians will need to consult ETKA (Audi's electronic parts catalog) and the repair manual for the latest information on required fasteners, bolts, nuts, and screws. If the steering wheel is determined to be faulty, a new steering wheel will be required for replacement.

Warranty Information

This repair may be covered under warranty, depending on the vehicle's status:

• New Vehicle Limited Warranty: Coverage applies for up to 48 months or 50,000 miles, whichever comes first.
• Certified Pre-Owned (CPO) Vehicles: For CPO vehicles, the repair may be covered under the G10 claim type, but ownership must be verified.
• Out of Warranty: If the vehicle is outside any applicable warranty, this Technical Service Bulletin serves as informational guidance only, and repair costs will be the owner's responsibility.

Important Warnings

Technicians must be aware of critical safety precautions during this repair:

• Airbag Handling: This TSB involves handling pyrotechnic components, specifically airbags. It is imperative to follow all safety precautions and steps detailed in the ElsaPRO repair manual, titled "Airbag Unit with Igniter, Removing and Installing," to prevent injury.
• Warranty Limitations: Owners should understand that if mechanical damage to the steering wheel is found, it may be attributed to external influence and might not be covered under warranty.

Revision History

This Technical Service Bulletin, 96 22 79 2061932/5, dated September 28, 2022, supersedes Technical Service Bulletin Group 96 number 22-78, dated September 16, 2022. Previous revisions include:

• Revision 5 (September 28, 2022): Revised header (Updated PR Code filter).
• Revision 4 (September 14, 2022): Revised Service (Added warning to follow all procedures in the appropriate repair manual when removing the airbag).
• Revision 3 (July 26, 2021): Revised header (Added new Model Years).

Labor Operations

Specific labor operations and codes are provided for warranty claims:

Labor Operation	Code	Time Unit	Notes
Driver airbag unit remove + reinstall (included in labor op 4810 1900 if steering wheel is replaced)	6958 1900	See SRT	With associated operations
Inspecting steering wheel for damage	4810 1999	5 TU
Steering wheel remove + reinstall (if required. Do not claim labor op 6958 1900 if this labor op is claimed)	4810 1900	See SRT	With associated operations
Diagnostic Time (GFF)	0150 0000	Time stated	On the diagnostic protocol (Max 15 TU)

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Source: NHTSA ID 10222137