2022-2024 Audi Virtual Cockpit Fault B174404

Symptoms

Owners of affected 2022-2024 Audi vehicles may experience specific issues related to the virtual cockpit. The primary symptom is the appearance of a warning message on the virtual cockpit display. This message reads: "Instrument cluster: fault. Limited warning messages. Please contact workshop".

In addition to the warning message, customers might also observe the virtual cockpit display unexpectedly rebooting. This indicates an underlying issue with the display's functionality.

Fault Codes / DTCs

When diagnosing this issue, technicians will find a specific Diagnostic Trouble Code (DTC) stored in the virtual cockpit control unit (J285, address word 0017). This DTC points directly to the malfunction:

Code	Description
B174404	Faulty multi-function display

This DTC B174404 confirms the problem lies with the virtual cockpit's display capabilities.

Technical Background

Audi has identified that the root cause of the "Instrument cluster: fault. Limited warning messages. Please contact workshop" warning and DTC B174404 is an intermittent malfunction within the graphics module of the Audi virtual cockpit. This module is responsible for rendering the display content, and its intermittent failure leads to the observed symptoms.

To address this issue in future production, Audi has implemented optimized hardware for the integrated circuit within the graphics module. This change aims to prevent such malfunctions in vehicles manufactured after the solution was introduced.

Repair Procedure Summary

To resolve the virtual cockpit malfunction and clear the DTC B174404, the instrument cluster must be replaced. The repair process involves several key steps for technicians:

1. Document Production Date: Before replacement, the technician must read and document the production date of the existing instrument cluster. This is done using self-diagnosis (OBD) by navigating to Address: 0017 System name: 0017 – Instrument cluster → Identification: → Production date.
2. Instrument Cluster Replacement: The faulty instrument cluster is then removed and a new, optimized instrument cluster is installed.
3. Claim Documentation: For warranty purposes, the TSB number (2071281/1) and the production date of the cluster must be documented in the claim notes.

Required Tools or Parts

While specific part numbers are not listed in this bulletin, technicians are advised to check with their Parts Department and/or ETKA (Electronic Parts Catalog) for the latest information and part bulletins. It is also crucial to consult the Repair Manual for any fasteners, bolts, nuts, and screws that require replacement during the instrument cluster removal and installation process.

Warranty Information

This Technical Service Bulletin outlines the warranty coverage for this repair:

• New Vehicles: The repair is covered under warranty for up to 48 months or 50,000 miles, whichever comes first.
• Certified Pre-Owned (CPO) Vehicles: For CPO vehicles, the claim type G10 applies, and owner verification is required.
• Out-of-Warranty Vehicles: If the vehicle is outside of any applicable warranty coverage, this Technical Service Bulletin serves as informational guidance only. Owners of such vehicles should be aware that repair costs may apply.

Owner Action

If your 2022-2024 Audi vehicle is displaying the warning message "Instrument cluster: fault. Limited warning messages. Please contact workshop" or if your virtual cockpit is unexpectedly rebooting, it is recommended to contact your authorized Audi dealership. They can diagnose the issue, confirm the presence of DTC B174404, and perform the necessary instrument cluster replacement. Ensure to mention the Audi e-tron B174404 issue when scheduling your service.

---

NHTSA ID: 10241438