Service Action
Code: 91FN
Subject

Software Update for High Voltage Battery Control Module - Version 3.2.1

Document History

Affected Vehicles

Date

Summary

08/14/2024

Updated claiming instructions

01/30/2024

Added claiming and repair instructions for resetting high-voltage
battery charger control module (J1050/AX4)

01/19/2024

Original publication

Country

Beginning
Model
Year

Ending
Model
Year

Vehicle

Vehicle Count

USA
USA
CAN
CAN

2022
2022
2022
2022

2023
2023
2023
2023

Q4 E-TRON SPORTBACK
Q4 E-TRON SUV
Q4 E-TRON SPORTBACK
Q4 E-TRON SUV

914
4,321
133
892

Check Campaigns/Actions screen in Elsa on the day of repair to verify that a VIN qualifies for repair under this
action. Elsa is the only valid campaign inquiry & verification source.

About This Service
Action



Campaign status must show “open.”



If Elsa shows other open action(s), inform your customer so that the work can also be completed at
the same time the vehicle is in the workshop for this campaign.

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.

Code Visibility

On or about January 19, 2024, the campaign code was applied to affected vehicles.

Owner Notification

Owner notification will take place in January 2024. Owner letter examples are included in this
bulletin for your reference.

Campaign Expiration
Date

This campaign expires on January 31, 2029. Work must be performed on or before this date
to be eligible for payment. Keep this expiration date in mind when scheduling customers for this
action. If a customer wishes to have this work performed after the expiration date, your normal
costs associated with this work will apply.

Additional Information

Please alert everyone in your dealership about this action, including Sales, Service, Parts
and Accounting personnel. Contact Warranty if you have any questions.
Dealers must ensure that every affected inventory vehicle has this campaign completed before
delivery to consumers.

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 1 of 48

Parts Information (if required)

Criteria

Quantity

Part Number

P.O.C. Part Description

As needed

0Z1-915-599-J

CELL MOD.

Ordering Method
(see description
below)

IMPORTANT INFORMATION FOR PART NUMBER 0Z1-915-599-J (Cell module):
0Z1-915-599-J (Cell Module) will be return blocked. In the chance that a cell module
needs returning, this return will need to be scheduled with your Dealer Support
Specialist (DSS).
For batteries not actively part of the repair process, either new or spent, dealers should
ensure compliance with local fire code battery storage requirements. Dealers who have
the appropriate storage capabilities/facilities that meet local fire code requirements, are
encouraged to order/ stock parts to complete the 91FN Repair.

ALL

4 per cell module

N -912-809-01

SCREW

1 per cell module

D -G00-018-M3

PASTE

1 per cell module

0Z1-998-474

SEP. FILM

1

1HV-915-754-A

VALVE

2

0Z1-915-433-C

GASKET

24

N -909-428-04

BOLT

4

N -912-832-01

BOLT

82

WHT-009-218

BOLT

22

WHT-008-738-A

BOLT

1

D -316-000-A1

UNDER COAT

2

1EA-802-131-A

CONNECTION

2

1EA-802-132-A

CONNECTION

1

D -454-300-H2

SEALANT

1

1EA-998-103

SEP. FILM

4

N -102-252-02

BOLT

1

G -12E-100-1G CON

G12 EVO Coolant Concentrate
(US Dealers)

1

G -12E-100-2G CON

G12 EVO Coolant Concentrate
(Canadian Dealers)

Free Order

The following underbody trim clips are needed ONLY in the event of breakage. They
may not be required for every repair.
Up to 14

WHT-003-491

NUT

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 2 of 48

Parts Control Type:
Free Order

Parts will be managed by Free Order

Initial Allocation:
NO

There will be no parts allocation. Please reference the Repair Projection Tool (below)
to view your potential VIN population.

NOTE
Campaign parts should always be ordered as per the parts information in this circular. The ordering system will
supersede the part, if applicable.
NOTE
Your dealer’s Estimated Remaining Repairs by campaign can be found in Parts on Command.
Click on “View Campaign List” and review the Estimated Remaining Repairs column.

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 3 of 48

Claim Entry Instructions
The labor times listed here may differ from the labor operations and labor times listed in ELSA.
After campaign has been completed, enter claim as soon as possible to help prevent work from being duplicated
elsewhere. Attach the Elsa screen print showing action open on the day of repair to the repair order.
If customer refused campaign work:
 U.S. dealers: Submit the request through Audi Warranty Online under the Campaigns/Update option.
 Canada dealers: Upload the repair order [signed by customer] to Audi WIN/Operations/Campaign Closure.
Service Number

91FN

Damage Code

0099

Parts Vendor Code
Claim Type

002
Sold vehicle: 7 10
Unsold vehicle: 7 90

Causal Indicator

Mark labor as causal if cell module(s) are not replaced
Mark CELL MOD* as causal part if a cell module(s) is replaced

Vehicle Wash
Vehicle Loaner

Do not claim wash under this action
See special claiming instructions for rental/loaner claiming.
NOTE: A 2nd claim must be entered for rental/loaner claiming

Vehicles have more than one criteria.
Complete and claim all applicable criteria on one claim.
Criteria I.D.

01, 02 and 03
Perform check cell equalization test plan and perform software update

LABOR
Labor Op

Time Units

Description

2706 89 50

SEE ELSA

Connect battery charger

0150 98 99

20

Perform cell equalization check via ODIS

0151 00 00

Time stated on
diagnostic protocol

Perform software update

0150 00 99

20

Bus sleep and adaptation test drive

0150 99 99

Time stated on
diagnostic protocol

Additional work if there is evidence that the
flash routine was interrupted

9352 41 99

10

Reset high-voltage charging unit

Continued on next page

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 4 of 48

NOTE: The software update and related GFF work is performed on more than one diagnostic
session. The multiple GFF logs can be added together.
Ensure the GFF logs are added together correctly. For example, two logs from the same
diagnostic session are not allowed.
Claims and GFF logs may be audited to ensure that the actual GFF log time is being claimed.
The technician is instructed to indicate which SVM code correlates with the specific GFF log to
aid in determining which GFF logs are used to calculate the total GFF time claimed.
EXAMPLE:

Continued on next page

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 5 of 48

AND (only if necessary)

Remove high-voltage battery and replace one or more cell modules.

LABOR
Labor Op

Time Units

Description

9301 19 50

SEE ELSA

Battery module remove+reinstall

9301 19 53
(up to 11)

SEE ELSA

Battery module remove+reinstall
(each additional module)

9302 19 82

SEE ELSA

Battery housing remove+reinstall

9303 19 60

SEE ELSA

High voltage battery remove+reinstall

1938 17 50

SEE ELSA

Coolant drain & fill

9303 01 50

SEE ELSA

High voltage battery check

9310 83 50

SEE ELSA

Disable HV system voltage deactivate and
activate

0150 00 00

Time stated on
diagnostic protocol

GFF Operations

9301 01 50

SEE ELSA

Battery module check
(classification)

9302 29 82

SEE ELSA

Battery housing clean
(if upper cover is reused)

9301 00 50

SEE ELSA

Package module
(only needed if removed module requires
special packaging based on classification
results)

9301 89 50
(up to 12)

SEE ELSA

Battery module charge

9303 01 52

SEE ELSA

High voltage battery check
(classification)

PARTS
Quantity

Part Number

Description

As needed
(up to 12)

0Z1915599J

2.00

0Z1915433C

GASKET

1.00/cell module

0Z1998474

SEP. FILM

2.00

1EA802131A

CONNECTION