2019-2022 Audi e-tron Battery Module Software Update TSB 93N6

Why This Update Matters

Audi has issued Technical Service Bulletin 93N6 to proactively prevent potential issues with the high-voltage battery system in certain 2019-2022 Audi e-tron vehicles. The battery system in electric vehicles comprises numerous individual battery cells. These cells naturally have slightly different capacities and voltages.

Without an effective balancing function, the overall capacity of the battery system would be limited by the weakest cell. This can lead to individual cells becoming overloaded and aging more rapidly. The efficiency of the balancing function can also be affected by potential errors in cell voltage measurement.

This proactive software update for the Battery Modules Control Unit aims to optimize the battery's balancing function and stabilize cell voltage measurements. This ensures the battery operates efficiently, maintains its capacity, and extends its lifespan, preventing conditions that could otherwise lead to reduced performance or premature wear of battery components. This Audi e-tron battery software update is crucial for maintaining the high-voltage battery warranty parameters.

Revision History

This Technical Service Bulletin has undergone several revisions:

• Revision 4 (09/25/2024): Updated work procedure information.
• Revision 3 (05/30/2024): Updated warranty parameters.
• Revision 2 (02/14/2024): Updated work procedure information.
• Revision 1 (04/26/2022): Original publication.

Important Warnings and Prerequisites

This Audi e-tron battery software update, identified as campaign 93N6, comes with several critical instructions and warnings that technicians must follow precisely. Owners should be aware of these to understand the complexity and importance of proper service:

• Campaign Eligibility: The procedure is only valid for vehicles displaying the 93N6 code in the Elsa Campaign/Action Information screen on the day of repair.
• Pre-existing Recalls: If safety recalls 93V2 or 93U9 are open for your vehicle, their evaluation steps must be completed before the 93N6 update. The 93N6 software update will erase historical high-voltage battery data, which could lead to inaccurate evaluations for 93V2 or 93U9 if performed out of sequence. The 93N6 update must be completed before the software update in 93U9.
• Safety Recalls: All Safety Recalls must be completed prior to completing this campaign.
• Diagnostic Tool Usage: Technicians are explicitly instructed DO NOT USE Guided Fault Finding (GFF) to perform this flash. Using GFF will prolong the process, and requests for additional time will not be considered for warranty claims. The update must be performed using the "Audi Flashing" process.
• Connection Method: Performing a software update using a Bluetooth or WiFi connection increases the risk of losing connection during the update, which could result in damage to the control module. It also greatly increases the time required. Requests for additional time or parts will be denied if the GFF log shows the update was performed using Bluetooth or WiFi. The VAS Diagnostics Interface MUST ONLY be connected to the tester with a USB cable. Using Bluetooth or WiFi for this action is PROHIBITED.
• Battery Connection: When connecting the charger directly to the battery, connect the positive cable to the positive terminal of the battery and connect the negative cable to the grounding lug on the chassis. DO NOT connect the ground cable directly to negative terminal of the battery.
• Hazard Lights: The procedure may cancel itself if the hazard warning lights are not switched on. Hazard warning lights prevent the system from switching to bus sleep mode during the update.
• Radiator Fan Warning: Radiator Fan(s) may cycle ON high speed during the Update Process! There is a serious risk that personal injury may result if contact is made with spinning fan blades. Keep hands and all objects away from Radiator Fan(s) during Update Process!

Required Tools and Equipment

Performing the Audi e-tron battery software update requires specific diagnostic equipment:

• Battery Tester/Charger: A GRX3000VAS (or equivalent) is needed to maintain battery voltage during the update.
• Diagnostic Tester: A VAS6150X/VAS6160X (or equivalent) is required to perform the software flash.

Detailed Repair Procedure for Audi e-tron Battery Software Update

The repair process for the 93N6 campaign involves a series of precise steps to ensure the successful software update of the Battery Modules Control Unit:

1. Preparation: Ensure the ODIS software is completely up to date. Refer to the "Alerts" section on the ServiceNet home page for the current ODIS version.
2. Power Supply: Connect a battery charger, such as the GRX3000VAS Tester/Charger, to the vehicle battery or underhood charging posts. The battery voltage must remain above 12.5 volts throughout the update. Failure to do so could damage the control module, and such damage will not be covered by warranty. Connect the positive cable to the positive terminal and the negative cable to the grounding lug on the chassis; DO NOT connect the negative cable directly to the negative terminal of the battery.
3. Vehicle Settings: Turn off the screen saver and power saving settings on the diagnostic tester to prevent it from entering power save mode during the update. Ensure the VAS Diagnostic Tester is plugged in using its supplied power adapters, not running on battery power alone.
4. Vehicle Access: Open the hood and the battery cover.
5. Hazard Lights: Switch on the hazard warning lights. This prevents the system from entering bus sleep mode during the update, which could otherwise cause the procedure to cancel.
6. Connect Diagnostic Tester: Connect the VAS6150X/VAS6160X Diagnostic Tester to the vehicle using a USB cable. Verify that the scan tool is communicating via USB. If Bluetooth or WiFi symbols are displayed, disconnect the diagnostic head and reconnect it with the USB cable.
7. Start ODIS Program: Launch the ODIS program on the diagnostic tester.
8. Initiate Flash: From the home screen of the scan tool, highlight and select "Flash". Follow the on-screen prompts.
9. Flash Mode: Ensure operating mode "Flash" is used. Performing this software update using "Diagnosis" (Guided Fault Finding) could result in non-payment of the claim.
10. Starting Flashing: Select "Starting Flashing" and continue to follow the on-screen prompts.
11. No Repair Order: Select "No RO" when prompted.
12. SVM Code Input: Highlight "SVM – Code Input". Select "Perform test". Enter the corrective action code 93N6A268. Select "Accept" and follow any remaining on-screen prompts.
13. Send Diagnostic Protocol: After the flash is successfully completed, select "Send" to transmit the diagnostic protocol online.
14. Exit Flash Session: Click "Flash" to exit the flash session.
15. Bus Sleep Mode: To clear any event memory entries generated during the flashing procedure, put the vehicle into bus sleep mode. This is achieved by disconnecting the diagnostic tester, removing the key from the vehicle, and locking the vehicle with the remote for 6 minutes.

Owner Action and Warranty Information

If your 2019-2022 Audi e-tron or e-tron Sportback is identified as needing the Audi e-tron battery software update under campaign 93N6, you should schedule an appointment with an authorized Audi dealer. This update is performed under the High-Voltage Battery Warranty.

Dealers must verify vehicle eligibility by checking the Elsa Campaign/Action Information screen for the 93N6 code on the day of repair. The Elsa system is the sole binding source for eligibility. If the campaign appears to have been performed but still shows open, the dealer must contact Audi Warranty before proceeding.

For warranty claims, the following details apply:

• Service Number: 93N6
• Damage Code: 0099
• Parts Vendor Code: 002
• Claim Type: Sold vehicle: 710; Unsold vehicle: 790
• Causal Indicator: Mark labor as causal
• Vehicle Wash/Loaner: Do not claim wash/loaner under this action.
• Criteria I.D.: S1

Labor Operations and Time Units:

Labor Op	Time Units	Description
2706 89 50	10	Connect battery charger
9301 25 99	Time stated on diagnostic protocol	Update battery module control module software
9035 33 99	10	Activate bus sleep mode

After the update is completed, the dealer will enter the claim as soon as possible to prevent work from being duplicated. They will also provide written notification on the Repair Order detailing all work performed, including this update.

NHTSA ID: 10255562