2022-2024 Audi MIB3 Volume Control Not Working TSB

Symptoms

Owners of affected 2022-2024 Audi vehicles may experience issues with the MIB3 infotainment system's volume control. The primary complaints include:

• "The touch-operated volume control in the center console is not working."
• "The volume control, as well as the skip buttons are inoperable."

These symptoms indicate a communication problem with the volume control system.

Fault Codes / DTCs

When diagnosing the inoperable volume control, technicians may find a specific Diagnostic Trouble Code (DTC) stored in the Information Electronics control unit (J794, address word 005F). The relevant DTC is:

Code	Description
U11B900	Volume control no communication (active/static)

This DTC confirms a communication failure related to the volume control module.

Diagnosis and Trigger Conditions

The presence of DTC U11B900, coupled with the owner's complaint that the touch-operated volume control and skip buttons are inoperable, points to a fault within the MIB3 system's volume regulation. This Technical Service Bulletin, 91 24 08 2072873/3, specifically addresses this condition.

Repair Procedure Summary

Audi Technical Service Bulletin 91 24 08 2072873/3 outlines a two-step repair process for the Audi MIB3 volume control not working issue:

1. Terminal 30 Reset: The first step involves performing a terminal 30 reset for the volume regulator E67. This is achieved by removing the relevant fuse for at least 30 seconds and then reinstalling it. After the fuse reset, the technician will check if the volume control is functioning correctly.
2. Volume Regulator Replacement: If the terminal 30 reset does not resolve the issue and the Audi MIB3 volume control not working symptom persists, the volume regulator E67 must be replaced. This ensures that the component causing the communication fault is addressed.

Required Tools or Parts

For the repair procedure, specific parts may be required:

• Fasteners, Bolts, Nuts, and Screws: As needed per the repair manual, information available in ETKA.
• Driver Volume Control (E67): If replacement is necessary, one unit is required. Part information can be found in ETKA.

Important Warnings

Technicians are advised to refer to the current wiring diagram available in ELSA for precise identification of the relevant fuse required for the terminal 30 reset procedure. This ensures the correct fuse is removed and replaced, preventing potential electrical issues.

Warranty Information

This repair is covered under Audi's warranty program, specifically:

• Claim Type: 110, applicable for vehicles up to 48 months or 50,000 miles.
• CPO Vehicles: G10 claim type for Certified Pre-Owned (CPO) vehicles, requiring owner verification.
• Out-of-Warranty: If the vehicle is outside of its warranty period, this Technical Service Bulletin serves as informational guidance only.

The Service Number for this procedure is 9110, and the Damage Code is 0010. Labor operations include checking the multimedia system operating unit (KL30 reset) with code 9195 0199 (20 TU without parts replacement, 5 TU with parts replacement), removing and installing the multimedia system operating unit (9195 19XX), and charging the battery (2706 8950). Diagnostic time is GFF, 0150 0060, with a maximum of 75 TU.

All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review by Audi Warranty. This TSB (2072873) supersedes Group 91 number 24-75 dated February 23, 2024.

What Owners Should Know

If you own a 2022-2024 Audi A3, S3, RS 3, e-tron GT, or Q4 e-tron and are experiencing the Audi MIB3 volume control not working issue, especially with inoperable volume and skip buttons, your vehicle may be eligible for this repair under warranty. Contact your authorized Audi dealership to schedule a diagnostic appointment and refer to Technical Service Bulletin 91 24 08 2072873/3.

NHTSA ID: 11002261