Technical Service Bulletin
93 Service info: lithium-ion high-voltage batteries - determining energy content, additional information for
dealerships
93 24 04 2074808/1 August 27, 2024.
Model(s)

Year

All Audi Vehicles 2013 – 2024

VIN Range

Vehicle-Specific Equipment

All

Lithium Ion high-voltage battery

Condition

This technical service bulletin (TSB) only applies to vehicles with an electric drive motor / highvoltage lithium-ion battery (fully electric vehicles and hybrid vehicles).

Customer states:
•

The electrical range has decreased.

•

The vehicle’s petrol consumption (hybrid) has increased.

or
•

I require reliable information about the current status of my vehicle’s high-voltage battery so that I can
sell the vehicle (for example).

Workshop findings:
•

The customer statement can be reproduced.

•

No relevant event memory entries (active/static) indicating an issue with the high-voltage battery are
logged in the control unit for hybrid battery management (diagnostic address 008C).

Technical Background 1
The high-voltage batteries in electric vehicles are subject to various ageing effects which could lead to the
energy content (energy density) being reduced. This reduction in the energy content, which is due to factors
such as ageing, is normal.

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intellectual property rights of Audi of America, Inc., its affiliated companies, and its licensors. All rights are reserved to make changes at any time without notice. No part of this
document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may
these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.

Technical Service Bulletin
In this connection, please also observe the model year-specific warranty conditions for hybrid
vehicles.

Production Solution
Not applicable.

Service
Check energy content of high-voltage battery:

There are various options in Guided Fault Finding for determining the energy content.

The main differences in the test plans are explained in the following table:

Duration

Battery Health Status

Battery Health

Battery Health Quick

(BHS)

Certificate (BHC)

Test (BHQ)

Approx. 25 to 50 time

Approx. 50 time units

Approx. 25 to 50 time

units (TU)

(TU) of productive

units (TU)

tester time. Total
duration up to 750 time
units (TU)
Output

General indication, no

Numerical value in %

Numerical value in %

numerical value in %
Measurement

+/- 10 percentage

+/- 1-2 percentage

+/- 10 percentage

tolerance

points

points

points (without
qualified measurement)

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All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other
intellectual property rights of Audi of America, Inc., its affiliated companies, and its licensors. All rights are reserved to make changes at any time without notice. No part of this
document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may
these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.

Technical Service Bulletin
+/- 5 percentage points
(with qualified
measurement)
Please refer to the

note under “Regarding

2.:”
Billing options

Warranty if customer

Warranty if customer

complaint is justified

complaint is justified.

Only in customer order

or
In customer order

The test plans can be found in Guided Fault Finding under the following path:
• 008C - Hybrid Battery Energy Management
• 008C - Battery management, functions
• 008C - Detect battery capacity status

1. The following test plans must be used to check the energy content of the high-voltage battery under
warranty:
•

Battery Health Status

•

Battery Health Certificate

If checking the energy content does not reveal any faults covered by the warranty, it is not possible to
bill the manufacturer.

© 2024 Audi of America, Inc.
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All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other
intellectual property rights of Audi of America, Inc., its affiliated companies, and its licensors. All rights are reserved to make changes at any time without notice. No part of this
document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may
these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.

Technical Service Bulletin
If checking the energy content reveals a fault covered by the warranty, this check must be billed in
the claim for the repair required to remedy the fault; it must not be billed separately.

2. The following test plans can be used to determine the energy content of the high-voltage battery if
requested by the customer.
•

Battery Health Quick Test

•

Battery Health Certificate

If the energy content is checked at the customer’s request, it is not possible to bill a warranty claim
to the manufacturer.

Regarding 1:
•

First perform "Battery Health Status” test plan in Guided Fault Finding.

•

If the test result shows a battery capacity of 70 % or above, this is indicated within the test plan by an X.
No numerical value is indicated.

•

If Guided Fault Finding does not recommend a long measurement (indicated by -), the test work ends
here.

•

If the energy content of the high-voltage battery is 70 % or above, there is no fault covered under
warranty.

•

If Guided Fault Finding recommends a long measurement (indicated by an X), the “Battery Health
Certificate” test plan must be performed in Guided Fault Finding.

•

The battery capacity is indicated as a percentage value. If the test result shows a battery capacity of 70
% or above, the test work ends here. This is not a fault which is covered under warranty.

•

If the test result shows a battery capacity below 70 %, check the warranty conditions applying to the
vehicle to find out whether this is covered by warranty. Before replacing the high-voltage battery, contact
your importer.

Regarding 2:
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All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other
intellectual property rights of Audi of America, Inc., its affiliated companies, and its licensors. All rights are reserved to make changes at any time without notice. No part of this
document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may
these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.

Technical Service Bulletin
•

Perform the “Battery Health Quick Test” or “Battery Health Certificate” test plan in Guided Fault

Finding.

The customer can positively influence the test result in the measurement tolerance by
preconditioning the high-voltage battery. Preconditioning the high-voltage battery can generate a
qualified measurement value for all vehicle types. The qualified measurement value can improve the
measurement tolerance from +/- 10 percentage points to +/- 5 percentage points. In addition to this,
the preconditioning reduces the length of time the vehicle needs to remain in the workshop if the
long measurement (BHC) is performed by avoiding waiting times due to discharging the battery to
reach the starting conditions. Refer to the information in the attachments included with this TSB. You
can supply the customer with the information regarding the test plan in question.

Warranty

Only the “Battery Health Status (BHS)” and “Battery Health Certificate (BHC)” tests can be billed
under warranty if there is a justified customer complaint. If the energy content is checked at the
customer’s request, it is not possible to bill a warranty claim to the manufacturer.
Service number/damage code: not applicable as no separate claim is to be made (refer to information
above)

The following repair operation numbers can be used to bill the test work:

Claim Type:

•

If the vehicle is outside of any warranty, this Technical Service Bulletin is
informational only.

Service Number:
Damage Code:

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All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other
intellectual property rights of Audi of America, Inc., its affiliated companies, and its licensors. All rights are reserved to make changes at any time without notice. No part of this
document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may
these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.

Technical Service Bulletin
Labor Operations:

Check high-voltage battery assembly

9303 0100

See SRT with
associated
operations

Diagnostic Time:

High-voltage battery assembly diagnosis

9303 0599

50 TU

GFF/Guided Functions

0150 0010

See SRT with
associated
operations

Check high-voltage battery assembly

9303 0299

Time stated on the
diagnostic protocol

Claim Comment:

Road test prior to the service procedure

No allowance

0 TU

Road test after the service procedure

No allowance

0 TU

As per TSB 2074808/1

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and

Procedures Manual. Claims are subject to review or audit by Audi Warranty.

Additional Information
All part and service references provided in this TSB (2074808) are subject to change and/or removal. Always
check with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check
the Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.
©2024 Audi of America, Inc. All rights reserved. The information contained in this document is based on the
latest information available at the time of printing and is subject to the copyright and other intellectual
property rights of Audi of America, Inc., its affiliated companies, and its licensors. All rights are reserved to
make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval
system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or
otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed
written permission of the publisher.

© 2024 Audi of America, Inc.
Internal

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All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other
intellectual property rights of Audi of America, Inc., its affiliated companies, and its licensors. All rights are reserved to make changes at any time without notice. No part of this
document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may
these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.