2021-2026 Audi Instrument Cluster Warning: Limited Messages

Audi has released Technical Service Bulletin (TSB) 90 24 96 2071281/2 to address an issue where the instrument cluster displays a warning message indicating limited functionality. This TSB, issued on May 31, 2024, supersedes the previous TSB 23-38 dated August 25, 2023, and provides updated service and warranty information.

This bulletin specifically targets a condition affecting the virtual cockpit in various 2021-2026 Audi models, where owners may observe a specific warning message or unexpected reboots of the display. If you are experiencing an Audi e-tron limited warning messages issue, this information is crucial for understanding the problem and its resolution.

Symptoms

Owners of affected Audi vehicles may notice one or both of the following symptoms related to the instrument cluster:

• A message appearing in the virtual cockpit display that states: "Instrument cluster: fault. Limited warning messages. Please contact workshop".
• The virtual cockpit display unexpectedly rebooting without any user input.

Fault Codes / DTCs

When diagnosing this issue, technicians will typically find a specific Diagnostic Trouble Code (DTC) stored in the virtual cockpit control module, also known as J285 (address word 0017).

This DTC B174404 directly points to a malfunction within the multi-function display component of the instrument cluster.

Technical Background

The root cause of the Audi e-tron limited warning messages and associated DTC B174404 is an intermittent malfunction occurring within the graphics module of the Audi virtual cockpit. This graphics module is responsible for rendering the visual information displayed to the driver. When it malfunctions, it can lead to the warning message and unexpected reboots.

Production Solution

Audi has implemented a production solution to address this issue. Vehicles manufactured after a certain point now incorporate optimized hardware for the integrated circuit within the graphics module. This updated hardware aims to prevent the intermittent malfunction seen in earlier versions.

Repair Procedure Summary

The repair for vehicles exhibiting the "Fault: Limited warning messages" and DTC B174404 involves replacing the Audi Virtual Cockpit -J285- unit. Before proceeding with the replacement, technicians are instructed to document the production date of the instrument cluster. This is done through the vehicle's diagnostic system:

1. Access Self Diagnosis and select diagnostic address 17.
2. Use the control module OBD drop-down menu and select "Identification".
3. Click "show expanded identification".
4. Expand the "Fazit identification" and record the "Day of manufacture".

Following the documentation, the Audi Virtual Cockpit -J285- is to be replaced according to the detailed instructions provided in the ELSA repair manual. This ensures the correct installation and calibration of the new unit.

Owner Action

If you own a 2021-2026 Audi model and are experiencing the "Instrument cluster: fault. Limited warning messages" warning or unexpected virtual cockpit reboots, it is recommended to schedule an appointment with an authorized Audi service center. They will be able to diagnose the issue, confirm the presence of DTC B174404, and perform the necessary repair by replacing the virtual cockpit unit as outlined in TSB 90 24 96 2071281/2. This repair is typically covered under warranty.

Source: NHTSA ID 11002158