2019-2021 Audi Models Red Steering Warning Light TSB

Symptoms

Owners of various 2019-2021 Audi models, including the Audi e-tron, may experience specific symptoms related to the power steering system. These include:

• "The red steering warning lamp lights up in the instrument cluster." This visual alert indicates a potential problem with the steering system.
• "Steering is heavy." Drivers may notice increased effort required to turn the steering wheel, making the vehicle harder to maneuver.

These symptoms suggest a malfunction within the power steering system that requires attention, often indicating an issue with the power steering control module.

Fault Codes / DTCs

When these symptoms occur, workshops typically find a specific Diagnostic Trouble Code (DTC) stored in the power steering control module (J500, address word 0044). The relevant code is:

This DTC C10AC07 directly points to an issue with the steering system's functionality, prompting the need for diagnostic and repair procedures.

Diagnosis / Trigger Conditions

Technicians investigating the Audi e-tron red steering warning light and heavy steering will perform specific checks. The concern can often be reproduced, meaning the symptoms can be observed consistently. Before proceeding with any software updates, it's crucial to ensure certain conditions are met:

• A visual inspection of the steering rack and steering boots must be performed to check for any physical damage or obstructions. The steering wheel should also turn freely without binding.
• The "Control module temperature" value in the extended ambient conditions of the J500 control module (address word 0044) must be checked. The temperature should be greater than 10°C (>10°C) before the software update can be performed.

Repair Procedure Summary

The repair for the Audi e-tron red steering warning light and associated heavy steering involves updating the software for the power steering control module, J500. The general steps are as follows:

1. Initial Inspection: Conduct a visual check of the steering rack and steering boots. Confirm that the steering wheel can be turned freely.
2. Temperature Check: Verify the control module temperature is above 10°C. This is a critical prerequisite for the software update.
3. SVM Update: Follow the detailed instructions provided in TSB 2011732, specifically the "00 Software Version Management (SVM), operating instructions." This bulletin guides technicians through the SVM update process.
4. Module Update: Update the power steering control module (J500, address word 0044) using the SVM action code 44A030 for parametrization of the control module.
5. Post-Repair Road Test: A road test after the service procedure is recommended to confirm the issue is resolved.

For Audi e-tron quattro and Audi e-tron Sportback models, additional labor operations may be required, such as removing and installing the front cover or noise insulation, depending on the specific vehicle configuration.

Required Tools or Parts

The primary