2022-2024 Audi MIB3 Volume Control Not Working TSB

Introduction to Audi MIB3 Volume Control Issues

Audi has issued Technical Service Bulletin (TSB) 91 24 61 2072873/1, dated January 30, 2024, to address concerns regarding the MIB3 infotainment system's volume control. This bulletin specifically targets scenarios where the touch-operated volume control in the center console, along with the skip buttons, becomes inoperable. Owners of various 2022-2024 Audi models may experience this problem, which can be accompanied by specific diagnostic trouble codes.

This TSB provides a clear diagnostic and repair path for technicians to resolve the Audi MIB3 volume control not working issue, ensuring proper functionality of the infotainment system.

Symptoms of Inoperable Volume Control

Owners may notice the following symptoms if their vehicle is affected by this condition:

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

These issues directly impact the user's ability to adjust audio levels and navigate media, leading to a frustrating driving experience.

Fault Codes / DTCs

When the Audi MIB3 volume control not working condition is present, technicians may find specific Diagnostic Trouble Codes (DTCs) stored in the Information Electronics control unit, identified as J794 (address word 005F). The primary DTC associated with this issue is:

Code	Description	Module / Status
U11B900	Volume control no communication	Active/Static (J794)

This DTC indicates a communication failure with the volume control component.

Diagnosis and Trigger Conditions

The workshop findings confirm that the issue stems from a communication problem with the volume control, specifically within the J794 Information Electronics module. This suggests an electrical or component-level fault rather than a software glitch. The TSB does not specify particular trigger conditions beyond the general failure of the volume control and skip buttons.

Repair Procedure Summary

To address the Audi MIB3 volume control not working issue, Audi TSB 91 24 61 2072873/1 outlines a two-step service procedure:

1. Terminal 30 Reset for Volume Regulator E67: Technicians are instructed to perform a terminal 30 reset for the volume regulator E67. This involves removing the relevant fuse for at least 10 seconds and then reinstalling it. This action can often resolve minor electronic glitches by power cycling the component.
2. Functionality Check: After the fuse reset, the volume control's functionality must be checked. If the volume control begins working correctly, no further repairs are necessary.
3. Volume Regulator Replacement (if needed): If the volume control remains inoperable after the terminal 30 reset, the volume regulator E67 must be replaced.

Required Parts

Should replacement of the volume regulator be necessary, the following part is specified:

• Driver Volume Control (E67): Quantity 01 (Part number to be sourced via ETKA).

Additionally, fasteners, bolts, nuts, and screws may be required as per the Repair Manual and should be sourced via ETKA/ELSA.

Warranty Information

This service bulletin applies to vehicles covered under Audi's 110 Up to 48 Months/50,000 Miles warranty. For Certified Pre-Owned (CPO) vehicles, the G10 claim type applies, requiring owner verification. If a vehicle falls outside of any applicable warranty, this Technical Service Bulletin is provided for informational purposes only. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

Important Warnings

NOTICE: When performing the terminal 30 reset or any related electrical work, technicians must "Refer to the current wiring diagram in ELSA for the relevant fuse." This ensures the correct fuse is identified and handled, preventing potential damage or incorrect repairs.

NHTSA ID: 10249582