A9424772073612_1

Technical Service Bulletin
94 PSS Headlight warning in cluster, DTC : B126A29, U110B00 stored in 09 module
94 24 77 2073612/1 April 8, 2024.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
All
Not Applicable
A3, S3, RS 3, Q4
e-tron quattro,
2022 - 2025
and Q4
Sportback e-tron
Q4 e-tron RWD
2023 - 2025
Condition
Customer states:
Intermittently a warning light for the exterior lighting or adaptive light is displayed in the instrument cluster. The
lighting system continues to work as it should.
Workshop findings:
All lighting functions continue to work properly.
The following DTCs are stored in the Onboard supply control unit, -J519- (address word 0009):
• DTC B126A29 Light switch range/performance
• DTC U112100 Databus missing message
• DTC U110B00 Light switch no communication
Technical Background
Diagnostics too sensitive in the J519.
Production Solution
This bulletin will be updated when more information is available. A solution is currently under development.
Service
If only DTC U110B00 “Light switch no communication” is stored, the cause of the fault may be a loose pin or wire.
In this case this TSB does not apply, carry out normal diagnosis.
Proceed with the steps below only if all DTC’s described above are stored.
1. Explain to the customer that a solution is expected to be available by the end of the 4th quarter of 2024
(subject to change) and that no repairs are necessary at this point. Do not replace any components for this
condition since this will not resolve the customer’s concern.
© 2024 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
2. Create a PSS record in the PSS application through the Pending Service Solutions (PSS) link in AccessAudi
(under Related Links >> Service).
The customer can temporarily resolve the concern by pressing the “AUTO” button on the light switch.
This will reset the fault detection and cause the warning lamp to go out.
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:
9405
Damage Code:
0040
Labor Operations:
Service light switch
9405 4199
Max 50 TU
Diagnostic Time:
GFF
0150 0010
See SRT with
associated
operations
GFF
0150 0060
Time stated on
diagnostic protocol
(Max 50 TU)
Claim Comment:
Road test prior to service procedure
No allowance
0 TU
Road test after service procedure
No allowance
0 TU
As per TSB 2073612/1
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.
Additional Information
All part and service references provided in this TSB (2073612) 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.
©2024 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
© 2024 Audi of America, Inc.
Internal
Page 2 of 3
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
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.
© 2024 Audi of America, Inc.
Internal
Page 3 of 3
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.