NHTSA ID Number: 10252010
Manufacturer Communication Number: Bulletin 49A4
TSB/Document Date: 2024-04-05
Summary
The operating noises made by the hydraulic unit may be louder than usual and/or brake pedal travel may be higher at very low speeds.
Release Date
Technical Service Bulletin
03/21/2024
49A4 UPDATE
Brake System Software Update – (NVLW)
Applicable Vehicles
Country
Beginning Model Year
Ending Model Year
Vehicle
Vehicle Count
USA
USA
CAN
CAN
2022
2022
2022
2022
2024
2024
2024
2024
E-TRON GT
RS E-TRON GT
E-TRON GT
RS E-TRON GT
5,278
1,676
501
211
Revision History
Revision
Date
Purpose
1
03/21/2024
Original publication
Condition/Technical Background
This Update has been proactively released to prevent the following condition(s) from occurring in the vehicle:
Criteria
Technical Background
01
The operating noises made by the hydraulic unit may be louder than usual and/or brake pedal travel may
be higher at very low speeds.
Remedy
Criteria
01
Remedy
Update the brake electronics and bleed the brake system.
This Update is in effect until removed.
Vehicle must meet all of the following criteria:
• Procedure is valid only for vehicles that show the 49A4 code in the Elsa Campaign/Action Information screen
on the day of repair.
• Vehicle must be within the New Vehicle Limited Warranty.
• Procedure must be performed within the allotted time frame stated in this Technical Service Bulletin.
• Procedure must be performed on applicable vehicles in dealer inventory prior to sale.
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.
49A4 Page 1 of 12
Release Date
03/21/2024
Technical Service Bulletin
49A4 UPDATE
Brake System Software Update – (NVLW)
Service
NOTE:
•
Elsa is the only valid inquiry/verification source. Check Elsa on the day this vehicle UPDATE will be
performed to verify vehicle eligibility for the UPDATE. Status must show “open”. Attach an Elsa printout
showing the “open” status to the repair order.
•
If this UPDATE appears to have already been performed but the code still shows open in Elsa, contact
Warranty before proceeding further. Another dealer may have recently performed this UPDATE but not
yet entered a claim for it in the system.
•
Elsa may also show additional open action(s); if so, inform your customer - this work can be done while
the vehicle is in for this UPDATE.
•
Contact the Warranty Helpline (U.S.) or the Warranty Campaign Specialist (Canada) if you have any
questions.
•
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 A
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.
49A4 Page 2 of 12
Release Date
03/21/2024
Technical Service Bulletin
49A4 UPDATE
Brake System Software Update – (NVLW)
Section A – Brake Electronics Software Update
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” document in the Service References section of
Elsa2Go.
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.
Flash process through “Audi Flashing” not Guided Fault Finding (GFF).
•
DO NOT USE Guided Fault Finding (GFF) to perform this flash. Using GFF will cause the flash
to take longer. Requests for additional time will not be considered.
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.
TIP
As a best practice, customer presets should be documented prior to performing any update in the event these
settings are lost during the update.
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.
49A4 Page 3 of 12
Release Date
03/21/2024
Technical Service Bulletin
49A4 UPDATE
Brake System Software Update – (NVLW)
NOTE
•
All campaign software updates must be completed during a single, standalone ODIS Diagnostic Session.
You must fully complete this campaign and send all logs before beginning any other campaigns or
operations.
•
If there are any ODIS “Hot-Fix” patches installed, they must be removed from the scan tool before
beginning this operation. ODIS “Hot-Fix” patches may affect the update process.
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!
IMPORTANT
To Update-Programming using SVM, review and follow instructions in Technical Bulletin 2011732: Software
Version Management (SVM) Operating Instructions for the US, or 2037026: Working with the Software Version
Management (SVM) for Canada.
The SVM Process must be completed in its entirety so the database receives the update confirmation response.
A warranty claim may not be reimbursed if there is no confirmation response to support the claim.
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.
49A4 Page 4 of 12
Release Date
03/21/2024
Technical Service Bulletin
49A4 UPDATE
Brake System Software Update – (NVLW)
•
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.
•
Use operating mode, FLASH.
•
Select “SVM – Code Input”.
•
Enter SVM code 49A4A144 and follow the on screen prompts.
•
When exiting the FLASH program, ensure the diagnostic log is sent to GFF
Paperless.
•
If the message pictured is present in the MMI after
completing the SVM, follow the on-screen steps in
the MMI to detect the parking brake position.
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.
49A4 Page 5 of 12
Release Date
03/21/2024
Technical Service Bulletin
49A4 UPDATE
Brake System Software Update – (NVLW)
Section B – Brake System Bleeding
NOTE
After the SVM update, the following fault may have
been logged: C10E1F2 – “Parking brake motor
position not plausible”. This fault must be addressed
before performing the brake system bleeding steps.
•
Scan the vehicle using GFF.
•
If the fault is not present or it is able to be
cleared, continue with the brake bleed
procedure.
•
If fault code C10E1F2 is present and is not
able to be cleared:
o
Perform the test plan “0003 - Brake
Button Initiation” through guided
functions of DA 0003.
•
Select option #1 for “Perform complete basic
setting”.
•
Follow the on screen prompts.
NOTE
The test plan will state a road test is required. A road
test is not required as there were not any parking
brake components replaced.
•
When asked if the rear brake rotors or parking
brake pads were replaced, select the option
for “No”.
•
Complete the remaining test plan steps.
•
After the test plan has completed, cycle the
ignition switch off and back on.
•
Continue with the brake bleed procedure.
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.
49A4 Page 6 of 12
Release Date
03/21/2024
Technical Service Bulletin
49A4 UPDATE
Brake System Software Update – (NVLW)
CAUTION
Risk of fluid overflow and paint damage
Portions of the brake bleeding procedure can use a
significant amount of brake fluid. Make sure to
monitor and empty the recovery container as
required.
•
The brake system will be bled in 3 steps:
o
Conventional brake bleeding.
o
Bleeding of the NX6 Brake booster
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Ideal for hydraulic and disc brakes
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
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TSB/Document ID: Bulletin 49A4
Replacement Service Bulletin Number:
MFR Communication Date: 2024-03-21
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES, HYDRAULIC; AUTOHOLD BRAKE SYSTEM/BRAKE HOLD:SOFTWARE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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