A9119772054301_2

91 Laser for Audi Cruise Assist is restricted, DTC C12EBF3 stored in distance control module
91 19 77 2054301/2 August 14, 2019. Supersedes Technical Service Bulletin Group 91 number 19-48 dated
March 15, 2019 for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
A6, A7, A8,
Q8, and
Audi e-tron
quattro
2019 - 2020
All
With Audi Cruise Assist
Condition
REVISION HISTORY
Revision
Date
Purpose
2
-
Revised header (Added Audi e-tron quattro and MY2020)
1
03/15/2019
Initial publication
Customer states:
 The driver assistance systems stopped working. A message for sensor blindness is displayed in the instrument
cluster.
Workshop findings:
The following DTC may be stored in the control module for distance control, J428 (address word 0013):
 DTC C12EBF3 (laser for distance control, range recognition restricted) with symptom code 2406.
Page 1 of 4
© 2019 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 Background
The laser for distance control sensor cannot
penetrate a third party “Car-Bra” (Figure 1) or
a protective workshop cover (Figure 2 and 3).
This causes the system to indicate “blindness”.
Note:
A vinyl wrap if covering sensors could have an
effect on the system.
Figure 1. “Car-Bra”.
Figure 2. Protective workshop cover.
Page 2 of 4
© 2019 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.
Figure 3. Protective workshop cover.
Production Solution
Not applicable.
Service
1. Check if the DTC time stamp coincides with the vehicle wearing a third party “Car-Bra” or having a protective
cover on.
2. In these cases, clear the DTC.
3. If it is caused by a “Car-Bra”, instruct the customer that using it can cause the driver assistance systems to
become inoperable.
We suggest only to use Audi Genuine Accessories as they have been tested to work in conjunction with all the
vehicle’s features.
Warranty
This TSB is informational only and not applicable to any Audi Warranty.
Additional Information
All parts and service references provided in this TSB (2054301) 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.
©2019 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
Page 3 of 4
© 2019 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.
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.
Page 4 of 4
© 2019 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.