2021 Audi A4 & A5 Suspension Warning Light TSB 2059665/1

Symptoms

Owners of affected 2021 Audi A4 and A5 vehicles may observe a specific warning light in the instrument cluster. The primary symptom is: "The warning light for the suspension comes on in the instrument cluster."

During workshop diagnosis, technicians performing a "Check control unit configuration" procedure may find that the software version management (SVM) system registers an unknown event. This prevents the J775 suspension control module (address word 0074) from being automatically parameterized, leading to the Audi A5 suspension warning light.

Repair Procedure Summary

Audi Technical Service Bulletin (TSB) 2059665/1 outlines a software update process to address the suspension warning light. The repair involves three main steps:

1. Preparation: Technicians must first follow all instructions detailed in TSB 2011732, which covers the 00 Software Version Management (SVM) operating instructions. This ensures the SVM system is correctly prepared for the update.
2. Software Update: The J775 suspension control module (address word 0074) needs to be updated. This is performed using the specific SVM action code 74A005.
3. Adaptation: After the software update is successfully completed, a new adaptation process for the suspension control module must be carried out. This step ensures the module is correctly configured and parameterized for the vehicle.

Required Software Versions and Codes

This TSB specifies various software part numbers and ZDC versions involved in the update. The old software part numbers include 8W0907777R and 8W0907777T, with an old software version of 1215. The update targets new software part numbers 8W0907777R or 8W0907777T (or higher), also with version 1215 (or higher).

Specific new ZDC versions are required depending on the model:

• For A4/allroad models, the new ZDC version is 8W0909576VC.
• For A5 Coupe / Sportback models, the new ZDC version is 8W2909576VC.
• For A5 Cabriolet models, the new ZDC version is 8W5909576VC.

The SVM Code Input for this procedure is 74A005.

Warranty Information

For vehicles still under warranty, applicable claim types should be used. If the vehicle is outside its warranty period, this Technical Service Bulletin serves as informational guidance. The service number for this procedure is 4316, with a damage code of 0010. Labor operations for the software update, including checking for DTCs, are coded as 0151 0000, with a maximum of 40 time units (TU) for diagnostic protocol time.

Diagnostic time (GFF) and road tests before the service procedure have no allowance (0 TU). A road test after the service procedure is allocated 0121 0004 with 10 TU. All warranty claims must comply with the Audi Warranty Policies and Procedures Manual and are subject to review.

Source: NHTSA ID 10176416