A9421322055123_4

94 Rear lighting warning displayed in the instrument cluster, various DTCs stored in the comfort system
control module
94 21 32 2055123/4 January 7, 2021. Supersedes Technical Service Bulletin Group 94 number 20-30 dated
December 17, 2020 for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
Q5, SQ5
2018 - 2020
All
Not Applicable
A6, A7, A8,
and S8
2019 - 2020
All
Not Applicable
A6 allroad,
S6, and S7
2020
All
Not Applicable
Condition
REVISION HISTORY
Revision
Date
Purpose
4
-
Revised Warranty (Updated Labor Operation)
3
12/17/2020
Revised title
Revised header (Updated Elsa display)
Revised Warranty (Added GFF)
2
10/22/2019
Revised header (Added MY2020)
Revised Technical Background (Added information)
Revised Production Solution (Added information)
Revised Service (Changed to SVM update)
Revised Warranty (Changed to SVM update)
Customer states:
 There is a warning message regarding a failure of the rear lighting displayed in the instrument cluster.
A6, A7, and A8:
 The rear lighting operates properly.
Q5:
 The rear lighting function is switched to the lower bumper as if the trunk is open.
Workshop findings:
Page 1 of 4
© 2021 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.
One or more of the following DTCs are stored as static or sporadic in the comfort system central control module,
J393 (address word 0046):
 DTC B12C315 (Right brake light bulb, interruption/short circuit to positive).
 DTC B12C215 (Left brake light bulb, interruption/short circuit to positive).
 DTC B133A15 (Bulb for left brake and tail light, interruption/short circuit to positive).
 DTC B133C15 (Bulb for right brake and tail light, interruption/short circuit to positive).
 DTC B12BE15 (Left tail light bulb, interruption/short circuit to positive).
 DTC B12BF15 (Right tail light bulb, interruption/short circuit to positive).
 DTC B12C615 (Bulb for high-level brake light, interruption/short circuit to positive).
Technical Background
A loss of communication between the internal components of the comfort system central control module, J393
(address word 0046) can result in the warning and faults displayed.
Production Solution
Optimized software is now available for the comfort system central control module, J393 (address word 0046).
Service
SVM Update Instructions
1. Follow all instructions in TSB 2011732: 00 Software Version Management (SVM), operating instructions.
2. Update the comfort system central control module, J393 (address word 0046) using the SVM action code as
listed in the table below, if necessary:
Model
A6, A7, A8,
and Q5
Old Software
Part Number
4N0907064*
Old
Software
Version
*
New Software
Part Number
New Software SVM Code
Version
Input
(or higher)
4N0907064*
0183
46A029
Tip: Keep the key placed against the reader coil for the duration of the flash.
Page 2 of 4
© 2021 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.
Warranty
Claim Type:
 110 up to 48 Months/50,000 Miles.
 G10 for CPO Covered Vehicles – Verify Owner.
 If the vehicle is outside any warranty, this Technical Service Bulletin is informational
only.
Service Number:
5789
Damage Code:
0039
Labor Operations: Software Update
Diagnostic Time:
Claim Comment:
0151 0000
Time stated on
the diagnostic
protocol (Max 25
TU)
GFF (Checking fault codes)
0150 0000
Time stated on
the diagnostic
protocol (Max 50
TU)
Road test prior to the service procedure
No allowance
0 TU
Road test after the service procedure
No allowance
0 TU
As per TSB #2055123/4
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.
Required Parts and Tools
Tool Number
Tool Description
VAS 6160/VAS 6150
VAS tester with current version of
ODIS (Windows 10)
Additional Information
All part and service references provided in this TSB (2055123) 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.
Page 3 of 4
© 2021 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.
©2021 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.
Page 4 of 4
© 2021 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.