2022-2026 Audi MIB3 Volume Control Not Working TSB

Symptoms

Owners of certain 2022-2026 Audi models may experience issues with the MIB3 infotainment system's volume control. The primary symptoms indicating an "Audi MIB3 volume control not working" condition include:

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

Fault Codes / DTCs

When diagnosing the issue, technicians may find a specific Diagnostic Trouble Code (DTC) stored in the Information Electronics control unit, identified as -J794- (address word 005F).

Code	Description	Module
U11B900	Volume control no communication	Information Electronics J794

This DTC U11B900 can be active or static, indicating a communication problem with the volume control.

Diagnosis

If you are experiencing an "Audi MIB3 volume control not working" issue, a diagnostic scan will likely reveal DTC U11B900 stored in the Information Electronics control unit. This code points to a communication fault with the volume control module.

Repair Procedure Summary

Technical Service Bulletin 2072873/4 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 Driver Volume Control (E67). This is done by removing the relevant fuse for at least 30 seconds and then reinstalling it. After the reset, the technician will check if the volume control is functioning correctly. If it is, no further repairs are needed.
2. Volume Regulator Replacement: If the volume control remains non-functional after the terminal 30 reset, the Driver Volume Control (E67) module should be replaced.

Required Tools or Parts

For the repair of the "Audi MIB3 volume control not working" issue, the following parts may be required:

• Driver Volume Control (E67): One unit, if replacement is necessary. Refer to ETKA for the correct part number.
• Fasteners, Bolts, Nuts, and Screws: As needed, per the repair manual. Refer to ETKA/ELSA for specifics.

Important Warnings

Technicians performing this repair must refer to the current wiring diagram in ELSA for the precise location of the relevant fuse required for the terminal 30 reset.

Warranty Information

Warranty claims related to this Technical Service Bulletin 2072873/4 must adhere to the Audi Warranty Policies and Procedures Manual. Claims are subject to review or audit by Audi Warranty. If the vehicle is outside of warranty, this bulletin serves as informational guidance only.

Service Number: 9110 Damage Code: 0010 Labor Operations:

• Check multimedia system operating unit (KL30 reset) (9195 0199): 20 Time Units (TU) without parts replacement, or 5 TU with parts replacement.
• Remove and install multimedia system operating unit (9195 19XX): Refer to the Standard Repair Time (SRT) with associated operations.
• Charge battery (2706 8950): Refer to SRT with associated operations.
• GFF (0150 0060): Time stated on the diagnostic protocol.

Claim Comment: As per TSB 2072873/4.

Revision History

This Technical Service Bulletin (TSB) 2072873/4 supersedes TSB Group 91 number 24-08, dated May 7, 2024. The revisions include:

• Revision 4: Revised header to include MY25.
• Revision 3 (05/07/2024): Revised header (added customer codes), updated service (reset time), and updated warranty (labor operations).
• Revision 2 (02/23/2024): Revised header (updated part number filter) and updated warranty (labor operations).

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Source: NHTSA ID: 11009961