2021 Audi A4/A5/S5 MIB3 Wireless ASI/ITM Fix

Owners of certain 2021 Audi A4, A5, S5, and RS 5 vehicles may encounter problems with their MIB3 infotainment system, specifically concerning the integrated toll module and the Audi Smartphone Interface. This Technical Service Bulletin, identified as 91 23 00 2070573/1, outlines the symptoms and the necessary software update to resolve these concerns. The issue often arises after the completion of campaign 91DZ.

Symptoms

Owners of affected vehicles may observe one or both of the following conditions:

• "The integrated toll module settings can no longer be accessed via the MMI."
• "The Audi smartphone interface can only be used wired (wireless ASI is inoperable)."

It's important to note that when these symptoms occur, workshops have reported that "No relevant DTCs are stored" in the vehicle's diagnostic system. The previous campaign 91DZ would have already been performed, and the information electronics (address word 005F) are found to have the target data container 8W1909545VJ logged in the GFF system.

Diagnosis / Trigger Conditions

The root cause of these issues, including the inoperable 2021 Audi A5 MIB3 wireless ASI, stems from a system limitation encountered during the campaign 91DZ. During this campaign, if the "Replace control module" routine was performed for DA0019 or DA0075, an older target data container was inadvertently assigned to the vehicle's information electronics -J794- (address word 005F). This incorrect assignment prevents proper functionality of the integrated toll module and the wireless Audi Smartphone Interface.

Repair Procedure Summary

The resolution for these MIB3 system issues, including the 2021 Audi A5 MIB3 wireless ASI problem, involves a software update. Technicians are instructed to follow a two-step process to address the problem described in Technical Service Bulletin 91 23 00 2070573/1.

1. Consult SVM Operating Instructions: The first step requires following all instructions detailed in TSB 2011732, titled "00 Software Version Management (SVM), operating instructions." This document provides the foundational procedures for performing software updates on Audi vehicles.
2. Update Information Electronics -J794-: Subsequently, technicians must update the Information electronics -J794- control unit, which is located at address word 005F. This update is performed using the specific SVM action code EGDCL35A001MLBNAR. This action code ensures that the correct, revised target data container is assigned to the vehicle, replacing the older 8W1909545VJ container that caused the malfunction.

Warranty Information

Audi provides specific guidelines for warranty claims related to this service bulletin:

• Claim Type: The repair is covered under claim type 110 for vehicles up to 48 months or 50,000 miles. For Certified Pre-Owned (CPO) vehicles, the claim type is G10, requiring verification of owner eligibility.
• Service Number: The designated service number for this procedure is 9196.
• Damage Code: The associated damage code is AD39.
• Labor Operations: The labor operation for the "Software Update (Includes checking for DTCs)" is 0151 0000. The time allocated for this procedure is based on the diagnostic protocol, with a maximum of 50 Time Units (TU).
• Diagnostic Time: No allowance is provided for GFF diagnostic time (0 TU), road test prior to the service procedure (0 TU), or road test after the service procedure (0 TU).
• Claim Comment: All warranty claims must include the comment "As per TSB 2070573/1" and adhere to the Audi Warranty Policies and Procedures Manual. Claims are subject to review or audit by Audi Warranty.

Important Notes for Owners

• Out-of-Warranty Vehicles: If your vehicle is outside of its warranty period, this Technical Service Bulletin is informational only. The cost of the repair may be your responsibility.
• Required Reference: The successful completion of this procedure relies on following the instructions in TSB 2011732: 00 Software Version Management (SVM), operating instructions.

Source

NHTSA ID: 10238184