2023 Audi e-tron Vehicle Lighting Warning TSB

Audi has issued Technical Service Bulletin (TSB) 2074438/1 to address a specific concern affecting certain 2023 Audi e-tron vehicles, as well as other e-tron and Q8 e-tron models from 2023-2024. This TSB provides a solution for a persistent warning message related to vehicle lighting appearing in the instrument cluster.

This bulletin, dated July 3, 2024, details a software-related fix for the Audi e-tron vehicle lighting warning issue, ensuring proper functionality and eliminating the nuisance message.

Symptoms

Owners of affected vehicles may observe the following symptom:

• A message appears permanently in the instrument cluster stating: "Vehicle lights: fault. Please contact workshop".

Despite this warning, the vehicle's lights function correctly, and there are no actual operational issues with the lighting system. Workshop findings indicate that no event memory entries related to the vehicle lights are logged in any control units, even though the instrument cluster message remains visible.

Technical Background

The root cause of this persistent Audi e-tron vehicle lighting warning is a software issue within the Comfort System Central Control Module, identified by diagnostic address 0046, also known as -J393-. This software anomaly triggers the erroneous warning message without any underlying hardware fault.

Repair Procedure Summary

The repair involves updating the software of the Comfort System Central Control Module (-J393-) to an optimized version. Technicians will perform the following steps:

1. Software Update: Update the -J393- module (diagnostic address 0046) using the Software Version Management (SVM) action code 46A034. The new software version required is 0630, replacing older versions like 0627 or 0628. The new software part number is 8W1.907.064.*.
2. Module Reset: After the software update is complete, the Comfort System Central Control Module (-J393-) must be reset. This involves pulling the fuses for the -J393- module for at least 10 minutes, following the current wiring diagram instructions found in the ELSA repair manual.

Important Warnings

Owners and technicians should be aware of the following critical information:

• Virtual Pedal Deactivation: "Prior to performing this SVM Update, please inform the customer that if the virtual pedal was deactivated from a prior TSB:2070966, the changes will be lost and must be reperformed. It is not possible to remotely store their settings."
• Key Position During Update: "The Key must be on the emergency reader coil during the update."

Warranty Information

This repair is covered under warranty for vehicles up to 48 months or 50,000 miles. For Certified Pre-Owned (CPO) vehicles, the claim type is G10. If the vehicle is outside of any warranty, this Technical Service Bulletin serves as informational guidance only.

• Service Number: 5789
• Damage Code: 0039
• Labor Operations:
  • Software Update: 0151 0010 (Refer to SRT for associated operations)
  • Reset of the Comfort System Control Module: 5789 0599 (10 Time Units)
  • Software Update: 0151 0060 (Time stated on the diagnostic protocol)

Warranty claims should be submitted as per TSB 2074438/1 and must comply with the Audi Warranty Policies and Procedures Manual.

NHTSA ID: 11005901