SB-2031989/1

Technical Service Bulletin
45 DTC stored after replacing ABS unit (DTC 01044)
45 12 06 2031989/1 December 5, 2012.
Model(s)
Year
A4
2009 – 2010
A5
2008 – 2010
A5 Cab
2010
VIN Range
Vehicle-Specific Equipment
All
Not Applicable
Condition
After replacing the ABS control unit, the new control unit stores DTC 01044 (Control Unit Incorrectly Coded).
No warning light is on and the brake electronics work correctly.
Technical Background
Due to a supersession of parts, only ABS/ESP hydraulic control units prepared for vehicles equipped with the
start-stop feature are supplied as replacement parts.
Once installed, the new unit stores DTC 01044 (Control Unit Incorrectly Coded) because it does not receive a
response on the data bus when checking for the start-stop feature. The missing response results in the DTC
entry.
Within the scenario described in the Condition section of this TSB, the missing start-stop response is the only
reason for this DTC. In all other respects the coding of the ABS/ESP control unit matches the vehicle data. The
entry does not affect the function of the brake electronics and no warning appears in the instrument cluster. There
are no effects on performance or safety.
Production Solution
No change.
Page 1 of 2
© 2012 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
Service
 If DTC 01044 (Control Unit Incorrectly Coded) occurs within the scenario described in the Condition section of
this TSB, it can be ignored.
 If DTC 01044 is stored along with a customer complaint or brake warning in the instrument cluster, proceed
according to Guided Fault Finding.
Warranty
This TSB is informational only and not applicable to any Audi warranty.
Additional Information
All parts and service references provided in this TSB are subject to change and/or removal. Always check with
your Parts Department and service manuals for the latest information.
Page 2 of 2
© 2012 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.