A4523362072304_1

Technical Service Bulletin
45 ABS/ESC speed sensor - implausible signal
45 23 36 2072304/1 December 13, 2023.
Model(s)
Year
All Audi Vehicles 2010 – 2024
VIN Range
Vehicle-Specific Equipment
All
Not Applicable
Condition
Customer states:
• TPMS warning appears in the instrument cluster although there is no pressure loss.
OR
• ABS warning message appears in the instrument cluster.
Workshop findings:
A DTC referring to an implausible signal of a rotational speed sender is stored in the ABS control unit J104
(address word 0003), multiple rotational speed senders may be stored.
Technical Background
If dirt, foreign objects, or grease have settled in the area of an ABS speed sensor or on the sensor ring on the
wheel bearing, the signals of the ABS speed sensor are distorted such this signal from the control unit is
recognized as implausible.
Production Solution
Not applicable.
Service
Please check the ABS speed sensors and the sensor rings on the wheel bearing with great care for foreign
objects, grease, and dirt, and clean all dirty components. Then erase the DTCs. If there are no irregularities
detected while checking, work through the DTCs using Guided Fault Finding.
Warranty
This TSB is informational only and not applicable to any Audi Warranty.
Additional Information
© 2023 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.
Technical Service Bulletin
All part and service references provided in this TSB (2072304) 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
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.
© 2023 Audi of America, Inc.
Internal
Page 2 of 2
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.