A2723532069916_1

Technical Service Bulletin
27 Battery: 12V Lead-Acid / AGM battery maintenance requirements
27 23 53 2069916/1 April 17, 2023.
Model(s)
Year
A3 Cabriolet
2018 – 2019
RS 5, and RS 7
2018 – 2019
2021 – 2024
VIN Range
Vehicle-Specific Equipment
All
Not Applicable
A3, S3, RS 3, A4
allroad, A4, S4,
A5, A5 Cabriolet,
A5 Sportback,
S5, S5 Cabriolet,
2018 – 2024
S5 Sportback,
A6, S6, A7, S7,
A8, S8, Q3, Q7,
R8, and R8
Spyder
RS 5 Sportback,
and e-tron
quattro
2019
2021 – 2024
Q8
2019 – 2024
A8 e quattro
2020 – 2021
A6 allroad, e-tron
Sportback
2020 – 2024
quattro, SQ7,
SQ8, and RS Q8
RS 6 Avant, A7 e
2021 – 2024
quattro
Q4 e-tron, and
Q4 e-tron
Sportback
2022 – 2024
Q4 e-tron S
quattro
2023 – 2024
Condition
Workshop findings:
Page 1 of 6
© 2023 Audi of America, Inc.
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
• The vehicle arrives at the dealership with a low state of charge of the 12V battery (A).
• The vehicle is parked for a prolonged period of time at the dealership.
• This applies only to customer vehicles.
Technical Background
12V Lead-acid or AGM battery’s performance can degrade rapidly when not properly maintained, including
permanently damaging the battery when stored for a prolonged period of time below a certain minimum state of
charge (SoC) (<80%).
Therefore, proper battery maintenance is required when the vehicle arrives for service or is parked for a
prolonged period of time in order to prevent unnecessary battery replacement and to not degrade the lifetime or
performance of the battery.
Production Solution
Not Applicable
Service
If a vehicle is expected to be parked at the dealership for a prolonged period of time, the following steps can be
taken to ensure that the 12V battery (A) is not damaged during that time period:
1. Fully charge the 12V battery (A) before the vehicle is parked for a prolonged period of time.
2. Check the battery’s state of charge (SoC) every 30 days. If the SoC is below 80%, charge the 12V battery
fully.
To determine the Battery’s SoC value, either one of the following two procedures can be chosen:
a. Activate transport mode via ODIS special functions before the vehicle is parked, and deactivate it when the
vehicle is returned to service.
To activate/deactivate transport mode, run the test plan 19 – Transport mode activating/deactivating under
special functions in ODIS (see Figure 1).
Page 2 of 6
© 2023 Audi of America, Inc.
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
Figure 1: Activate/Deactivate transport mode with ODIS.
This will cause the vehicle to display the current state of charge of the 12V battery (A) on the instrument
cluster every time the ignition is turned off (see Figure 2).
Figure 2: SoC display in transport mode.
OR
b. The current battery SoC can be read via ODIS:
Page 3 of 6
© 2023 Audi of America, Inc.
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
Under Control Modules, select 0019 – Data Bus OBD Interface > Guided Functions > 19 – Read measuring
values (see Figure 3).
Figure 3: GFF 19 – Read measuring values.
What measuring value do you want to read - select option 2 – Measuring values for battery, generator,
energy management, and others.
IDE01839 – Battery charge level (see Figure 4)
Page 4 of 6
© 2023 Audi of America, Inc.
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
Figure 4: Measured value
Replacing a vehicle battery that has become defective due to insufficient SoC while the vehicle is in the
care of a dealership is not covered under warranty if the aforementioned checks have not been
performed.
Warranty
This TSB is informational only and not applicable to any Audi warranty.
Additional Information
All part and service references provided in this TSB (2069916) 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.
©2023 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
Page 5 of 6
© 2023 Audi of America, Inc.
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
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.
Page 6 of 6
© 2023 Audi of America, Inc.
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.