A942020201780613

94 Light malfunction message in instrument cluster, DTC 03280, 01800, B126AF0 or B126AF1 stored in
the vehicle module
94 20 20 2017806/13 March 17, 2020. Supersedes Technical Service Bulletin Group 94 number 19-13 dated
September 17, 2019 for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
A5
2010 - 2020
All
Not Applicable
Q3
2015 - 2020
All
Not Applicable
Q7
2017 - 2020
All
Not Applicable
A4, Q5
2009 - 2020
All
Not Applicable
A8, TT
2011 - 2018
All
Not Applicable
A6, A7
2012 - 2018
All
Not Applicable
Condition
REVISION HISTORY
Revision
Date
Purpose
13
-
Revised header (Added DTC)
Revised Condition (Added DTC)
Revised Technical Background (Updated information)
12
09/18/2019
Revised header (Updated model years for A3, A4, A5, A6, A7, A8 Q5,
and Q7)
Revised Condition (Updated faults for current models)
Revised Technical Background (Added information)
11
03/05/2015
Revised header (Added Q3 and TT)
Customer states:
 The light bulb warning light is displayed in the instrument cluster with the following message: “Vehicle lights:
malfunction”.
Workshop findings:
 Exterior lights are functioning properly.
One or more of the following DTCs is stored in the vehicle electrical system control module, J519 (address word
0009):
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© 2020 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.
 DTC 03280 (Light switch position implausible signal).
 DTC 01800 (Light switch E1, no signal/communication).
 DTC B126AF0 (Light switch implausible switch position).
 DTC B126AF1 (Light switch in intermediate position).
Technical Background
If the headlight switch is moved to an intermediate position and
remains there (Figure 1), the light bulb warning light and the
error message appear after approximately ten seconds (Figure
2).
Figure 1. A headlight switch in an intermediate
position.
Figure 2. The warning light and error message
in the instrument cluster display.
Once displayed, the message turns off after approximately five seconds. The light bulb warning light turns off
only after the headlight switch is turned to a defined position, and the status of DTC 03280 and DTC 01800 or
DTC B126AF0 and DTC B126AF1 are changed to sporadic.
After 40 driving cycles without an implausible signal detected, the DTCs are automatically cleared.
Page 2 of 4
© 2020 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.
It is possible a faulty switch can cause the same faults and
warning. For faults that are static or concerns able to be reproduced, use the MVBs within the 09 module to determine if
the light switch position can be properly detected.
If the MVB does not match the physical position of the headlight
switch, the switch is faulty.
In this example, the intermediate position of the rotary knob
(Figure 3) is correctly detected in the MVBs of the 09 module
(Figure 4). This is normal and does not indicate a faulty
component. In this case, explain the operation to the customer.
Figure 3. Switch in an intermediate position
(2018 A4).
Figure 4. The corresponding MVB showing the implausible switch position (2018 A4).
Production Solution
Not applicable.
Service
Determine if the above situation applies to the vehicle, and explain the Technical Background to the customer.
Replacing parts does not change the behavior.
Warranty
This TSB is informational only and not applicable to any Audi Warranty.
Additional Information
All part and service references provided in this TSB (2017806) 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
© 2020 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.
©2020 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
© 2020 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.