NHTSA ID Number: 11007369
Manufacturer Communication Number: Circular 91FN_REV2
TSB/Document Date: 2024-09-06
Summary
91FN Dealer Communication - Revision. Affected vehicles will receive the latest software version via a software update. This software contains an optimized self-diagnosis function for the high-voltage battery
. In addition to the software update, the high-voltage battery
cells may experience an increased self-discharge. The high-voltage battery
will be evaluated, and any affected high-voltage cell modules will be replaced.
-VAS5908-
-VAS6154A(or newer equivalent)
Diagnostic Tester
-VAS6150D(or higher)
USB Module
-VAS6154/4A(included with -VAS6154A-)
(or newer equivalent)
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi
dealer. 2024 Audi
of America, Inc. and Audi
Canada. All Rights Reserved.
91FN Page 13 of 48
Required Tools (if HV battery
cell module requires replacement)
Engine Support Set
-10-222B-
Adapter
-10-222A/14Qty. = 2
Module Lifting Aid
Lifting Tackle
-T10619-
-3033-
Shock-Proof Protection
(30 Pcs)
Shock-Proof Protection
-T10608-
Qty. = 3
Removal Wedge Set
Engine Support - Bracket
w/Spindle and hook
-VAS895015-
Shop Crane
-VAS6100(or equivalent)
-T10628-
-10-222A/10-
Insulating Mat
-VAS6762/44-
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi
dealer. 2024 Audi
of America, Inc. and Audi
Canada. All Rights Reserved.
91FN Page 14 of 48
Scissor Lift Table
Engine Bung Set
-VAS6131B-
-VAS6122-
(or equivalent)
(or equivalent)
Leak-tight Connector
Pressure and Vacuum
Pump
-T10607-
Digital Pressure Sensor
-VAG1397B-
Cooling System Tester Directional Valve
-VAS691005/1(component of
-VAS691005-)
High Voltage Tool Set Voltage Tester
-VAS671005-
High Voltage Tool Set –
Screwdriver
-VAS6762/34-
High Voltage Tool Set Torque Wrench
-VAS6883/1A-
Cooling System Tester Directional Valve
-VAS691005/5-
-VAS6762/45-
(component of
-VAS691005-)
Template
Cooling System Charge Kit
-T10606-
-VAS6096-
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi
dealer. 2024 Audi
of America, Inc. and Audi
Canada. All Rights Reserved.
91FN Page 15 of 48
Cooling System Tester
Hose Clamps - Up To
25mm
-VAG1274B-
-3094(or equivalent)
Module Balancer
-VAS6910-
Padlock
-T40262/1-
MEB Modules Expansion
Set
-VAS6910/21-
Vehicle Diagnosis System Connection Lead
-VAS5051/66-
(from Service Disconnect
Lock -T40262-)
Pressure Sensor
-VAS611013-
(MRT)
Insulated Torx Wrench Set
- 3/8
-VAS691003A-
*Extension Cables for
High-Voltage Battery![]()
*High Voltage Diagnostics
Box
-VAS671007-
-VAS5581A-
*NOTE: Either -VAS671007- or -VAS5581A- may be used for this repair.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi
dealer. 2024 Audi
of America, Inc. and Audi
Canada. All Rights Reserved.
91FN Page 16 of 48
Cooling System Service
Machine – TEXA
High Voltage Tool Set –
Reversible Ratchet 3/8"
-VAS531011KIT-
-VAS6762/29-
High Voltage Tool Set –
Extension 140mm
-VAS6762/31-
Diagnostic Tester
-VAS6150X/6160X(or equivalent)
Double Cartridge
Adhesive Gun
-VAS5237-
Shackle (Equivalent to
VAS691009A)
-VAS691009USQty. = 8
Battery Tester/Charger
capable of minimum 90
Amp continuous supply
Female adapter for the
-VAS5237(based on shops preferred
adapter style)
(locally sourced)
Pipe Brush
-VAS294029-
Test Adapter - Hybrid![]()
Module
(or equivalent)
-VAS6558A-
Double Suction Lifter
Qty. = 2
High Voltage Tool Set –
Screwdriver Insert XZN
M10
-VAG1344-
-VAS6762/27-
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi
dealer. 2024 Audi
of America, Inc. and Audi
Canada. All Rights Reserved.
91FN Page 17 of 48
Required Shop Materials (if necessary)
Cleaner D -009-401-04
(shop supply)
-OR91% Isopropyl Alcohol
Lint Free Towels
(locally sourced)
(locally sourced)
NOTE: Use only 91% Isopropyl alcohol as a cleaner
(9% water). Do not use Isopropyl with any
additional surfactants (cleaners) or additives
(scents).
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi
dealer. 2024 Audi
of America, Inc. and Audi
Canada. All Rights Reserved.
91FN Page 18 of 48
Repair Instruction
Section A - Check for Previous Repair
•
Enter the VIN in Elsa and proceed to the
“Campaign/Action” screen.
TIP
On the date of repair, print this screen and keep a
copy with the repair order.
•
Confirm the Campaign/Action is open . If the status is closed, no further work is
required.
•
Note the Applicable Criteria ID for use
in determining the correct work to be done and
corresponding parts associated.
CRITICAL REPAIR STEP
STOP!
If multiple software update Campaign/Actions are
open, they must be performed in order of the Start
date . The oldest should be performed
first.
•
All Safety Recalls must be completed prior to
completing this campaign.
•
Proceed to Section B.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi
dealer. 2024 Audi
of America, Inc. and Audi
Canada. All Rights Reserved.
91FN Page 19 of 48
Section B – SVM Instructions
NOTE
Prior to launching the VAS Diagnostic Tester and starting an update, ensure the following conditions are met;
The ODIS software is completely up to date.
•
Refer to the “Current ODIS Service Version” circular found in Elsa2Go Service References.
The battery charger is connected to the vehicle battery and remains connected for the duration of the
software update.
•
Battery voltage must remain above 12.5 volts for the duration of the software update. Failure to do
so may cause the update to fail, which could result in damage to the control module. Control modules
damaged by insufficient voltage will not be covered.
The screen saver and power saving settings are off.
•
Failure to do so may result in the tester entering power save mode during the software update, which
could result in damage to the control module.
The VAS Diagnostic Tester is plugged in using the supplied power adapters.
•
Under no circumstances should the tester be used on battery power alone during the software
update. Failure to do so may result in the tester powering off during the update, which could result
in damage to the control module.
The VAS Diagnostics Interface MUST ONLY be connected to the tester with a USB cable.
•
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 to perform the update. Requests for additional time or
parts will be denied if the GFF log shows the update was performed using Bluetooth or WiFi.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi
dealer. 2024 Audi
of America, Inc. and Audi
Canada. All Rights Reserved.
91FN Page 20 of 48
CRITICAL REPAIR STEP
STOP!
•
Check for pre-existing faults.
•
If any of the modules being updated are offline and cannot be identified, the communication issue must be
addressed prior to starting this procedure.
•
Any module with a “Faulty Control Module” fault that cannot be cleared, must be addressed prior to starting
the flash. The flash may fail for the affected control module.
•
Diagnosis and repair of pre-existing conditions are not covered under this action.
•
No additional/other work may be performed on the vehicle for the entire duration of the update.
•
The firewall settings which are listed in the latest release notes of the current ODIS version always apply.
•
It is essential to follow the correct sequence when performing the individual steps, otherwise the flash routine
will be interrupted.
CRITICAL REPAIR STEP
STOP!
Before starting programming, it is essential to perform the following actions
for the -VAS5908- battery charger.
The battery charger’s default setting will switch the charger off automatically after a
period of time. To prevent this, the following must be carried out.
Switch it OFF and then ON again each time the charger is connected.
The battery charger’s display must have switched off before it’s restarted.
The charging time can be changed in the charger’s settings menu (access code =
6161). Refer to the owner’s manual for further information. DO NOT change any
settings that will damage the charger or the vehicle.
CRITICAL REPAIR STEP
STOP!
•
The software update is performed in multiple steps, using a different SVM code for each step.
•
Pay very close attention to the instructions outlined in each repair step.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi
dealer. 2024 Audi
of America, Inc. and Audi
Canada. All Rights Reserved.
91FN Page 21 of 48
CRITICAL REPAIR STEP
STOP!
Perform the following before beginning the software update procedure:
•
Switch off all consumers, air conditioning, heater blower motor, lights, heated seats, etc.
•
Ensure the latest version of ODIS is downloaded.
•
Ensure diagnostic head is connected to ODIS tester via USB cable.
•
Move selector lever to P.
NOTE
Flashing times will vary. The time it takes to complete the software updates is dependent on several factors, including
the workshops internet download speed.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi
dealer. 2024 Audi
of America, Inc. and Audi
Canada. All Rights Reserved.
91FN Page 22 of 48
NOTE
In an effort to keep track of the time units from the multiple SVM codes, the SVM code can be entered in the RO
field in ODIS. This will then be populated in the RO field in GFF Paperless.
•
Instead of selecting “No RO” during the vehicle scan, select “Own order number” .
•
Then enter in the SVM code(s) (or step) that is being used during that session .
•
Once the log is sent to GFF Paperless, the Diagnosis ID from the specific SVM performed can then be easily
identified:
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi
dealer. 2024 Audi
of America, Inc. and Audi
Canada. All Rights Reserved.
91FN Page 23 of 48
Step 1 - Perform “Check Cell Equalization” Test Plan
•
Use operating mode, DIAGNOSIS.
•
Select the Guided Functions test plan list for address 008C.
•
Perform test plan, “AX2 – High-Voltage Battery
1 – Check cell
equalization” and follow the on-screen prompts.
•
If the test plan results indicate the HV battery
is OK:
o
•
Proceed to Step 2
If the test plan results indicate a cell module requires replacement:
o
The cell module(s) must be replaced before performing any
additional software updates.
o
Proceed to Section C.
o
After the cell module(s) have been replaced, proceed to Step 2
of the SVM instructions to begin the software update process.
Step 2 - Perform SVM via DIAGNOSIS + CAN
•
This SVM code will erase some historical data for the HV battery
.
•
Use operating mode, DIAGNOSIS.
•
Select “SVM – Code Input”.
•
Enter SVM code ME321ZDC and follow the on screen prompts.
•
Select communication path CAN when prompted.
IMPORTANT
The vehicle can no longer be driven once the SVM code has been
run.
•
Exit Diagnosis completely and send log to GFF Paperless.
•
Proceed to Step 3 once the SVM is complete.
Step 3 - Perform SVM via FLASH + CAN
•
Use operating mode, FLASH.
•
Select “SVM – Code Input”.
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TSB/Document ID: Circular 91FN_REV2
Replacement Service Bulletin Number:
MFR Communication Date: 2024-08-14
MFR Internal Campaign ID/Software Version: 91FN
Communication Type: Service Campaign
NHTSA Components: UNKNOWN OR OTHER
MFR Component System:
MFR Component Subsystem:
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