2023-2024 Audi e-tron GT High-Voltage Battery Software Update

Introduction to the 931D Update

Audi has issued Technical Service Bulletin (TSB) 931D to update the high-voltage battery diagnostic software in specific 2023-2024 Audi e-tron GT and RS e-tron GT models. This update, identified as 931D, is part of Audi's quality assurance process to enhance the monitoring and diagnostic capabilities of the high-voltage battery system.

The primary goal of this software revision is to improve the detection of potential irregularities within the high-voltage battery. By updating the diagnostic software, the system can more accurately identify and signal any issues, typically through a "warning lamp in the instrument cluster."

Symptoms

Owners of affected 2023-2024 Audi e-tron GT vehicles may notice a "warning lamp in the instrument cluster" illuminating. This warning indicates that the vehicle's high-voltage battery diagnostic system has detected potential irregularities. The TSB aims to refine the software responsible for detecting and reporting these conditions.

Diagnosis

To determine if your Audi e-tron GT high-voltage battery software requires this update, an authorized Audi dealer will check the ELSA Campaign/Action Information screen. The vehicle must display the 931D code in this system, indicating eligibility for the update. Additionally, the vehicle must be within its New Vehicle Limited Warranty period.

Important Warnings and Owner Information

Owners should be aware of several critical points regarding this update:

• Dealer Verification is Key: The ELSA system is the only valid source for verifying vehicle eligibility for this update. Other systems are not considered valid and may lead to non-payment of a claim.
• No Customer Notification: Audi is NOT notifying consumers directly about this software update. Owners must proactively inquire with their dealer.
• Radiator Fan Safety: During the update process, the "Radiator Fan(s) may cycle ON high speed." There is a serious risk of personal injury if contact is made with spinning fan blades. Technicians are instructed to keep hands and all objects away from the radiator fan(s) during the update.
• Warranty Claim Reimbursement: A warranty claim for this update may not be reimbursed if the Software Version Management (SVM) process is not completed in its entirety, or if the update fails and ODIS feedback is not sent prior to further diagnosis.
• Connectivity Requirements: The VAS Diagnostics Interface MUST ONLY be connected to the tester with a USB cable. Performing a software update using a Bluetooth or Wi-Fi connection significantly increases the risk of losing connection, potentially damaging the control module. It also extends the time required for the update.
• Do Not Use GFF: Technicians are explicitly instructed to "DO NOT USE Guided Fault Finding (GFF)" to perform this flash, as it will take longer and requests for additional time will not be considered.

Repair Procedure Summary

The repair involves updating the high-voltage battery diagnostic software using the Audi diagnostic system. The general procedure is as follows:

1. Preparation: Ensure the ODIS software is up to date. Connect a battery charger capable of maintaining 100 A and ensuring charging voltage above 14V throughout the update. All vehicle consumers (lights, AC, heated seats) must be switched off. The screen saver and power saving settings on the diagnostic tester must be disabled. The VAS Diagnostic Tester must be plugged in via its power adapter and connected to the vehicle via a USB cable.
2. Vehicle Setup: Move the selector lever to 'P' and open the hood. Disconnect the High-Voltage System Maintenance Connector - TW - and ensure the hood remains open during the flash.
3. Software Update: Launch the diagnostic tester in 'FLASH' operating mode. Select "SVM – Code Input" and enter the SVM code 93SWA799. Follow the on-screen prompts to perform the software update.
4. Post-Update: Reconnect the High-Voltage System Maintenance Connector - TW -. Ensure the diagnostic log is sent to GFF Paperless when exiting the FLASH program.

Required Tools or Parts

Authorized Audi service facilities will require specific tools to perform this software update:

• Battery Tester/Charger: -VAS5908- (or an equivalent charger with a current rating of at least 100A).
• Diagnostic Tester: -VAS6150X/VAS6160X- (or an equivalent diagnostic tool).

Warranty Information

This update, identified by Service Number 931D, is covered under the New Vehicle Limited Warranty. Dealers should enter the claim as soon as possible after completion to prevent duplicate work. The Damage Code is 0099, and the Parts Vendor Code is 002. For sold vehicles, the Claim Type is 7 10, and for unsold vehicles, it is 7 90. Labor is marked as causal. The labor operations are 0151 00 10 (Software update - setup + battery charger) and 0151 00 60 (Software update - GFF Operations).

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Source: NHTSA ID: 11021431