A941567 2027773-

Technical Service Bulletin
94 LED daytime running light diagnosis tips
94 15 67 2027773/4 May 21, 2015. Supersedes Technical Service Bulletin Group 94 number 12-96 dated
November 1, 2012 for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
All
2008 - 2013
All
LED Daytime Running Lights
Condition
REVISION HISTORY
Revision
Date
Purpose
4
-
Revised header data (Removed MY2013 A4, A5, A5 Cabriolet, and Q5)
3
11/1/2012
Revised Service (Model clarification)
2
3/15/2012
Revised header date (Added model years)
Revised Service (Adjusted diagnosis procedure)
Part or all of the daytime running lights do not work on vehicles equipped with LED daytime running lights.
Tip: For vehicles with halogen daytime running lights, refer to TSB 2017488: 94 Halogen Daytime running
lights do not work.
Technical Background
In the past, the daytime running light bulbs were a serviceable part. In this application, the LED strip cannot be
replaced, and may have an associated control module. This TSB is for servicing information only.
Production Solution
Not applicable.
Service
1. If any DTCs related to daytime running lights are stored in the vehicle electrical system control module, J519
(address word 09), perform the appropriate test plan before proceeding.
Confirm that the condition is not related to low battery voltage during vehicle start. It is possible that the control
modules will reset if the battery voltage at the headlight falls below 9V, which can cause intermittent DRL
operation.
© 2015 Audi of America, Inc.
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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. If both front daytime running lights are inoperative, verify that they are turned on in the vehicle system option
before proceeding:
• For A3, TT, R8: The daytime running lights are automatically switched on when the headlight switch is set to
AUTO. If the headlight switch is set to OFF, the daytime running lights will be off. This functionality cannot
be changed.
• For A4, A5, A6, A7, A8, Q7: In vehicles with MMI, the daytime running lights are switched on via the menu
option Exterior light control or Exterior Lighting.
3. • If one or several of the daytime running lights are
inoperative (Figure 1):
Replace the entire affected headlight assembly. The LED
light strip is not a serviceable part.
Tip: Only the headlight assembly needs to be
replaced. Any headlight control modules can be reused.
• If all of the daytime running lights in one headlight
assembly are inoperative: Proceed to step 4.
Figure 1. An inoperative LED light.
4 If all of the daytime running lights in one headlight assembly are inoperative:
• For A3, A5 (2008 - 2012 only), and TT:
Replace the entire headlight assembly, as these vehicles do not have serviceable daytime running light
control modules.
• For all other vehicles:
In order to verify the root cause, swap the daytime running light control modules between the two headlights:
• If the problem is resolved, leave the control modules on the swapped sides and release the vehicle.
Manufacturing differences between components can sometimes be remedied simply by exchanging right
and left control modules.
• If the problem follows the daytime running light control module from the inoperative side, replace the
control module.
• If the problem does not follow the daytime running light control module from the inoperative side, verify all
headlight connections, then replace the entire headlight assembly on the inoperative side.
Tip: For 2009 - 2010 Q5 vehicles, follow TSB 2020780: 94 One or more Daytime Running Light LEDs in
one headlight assembly are inoperative.
Warranty
This TSB is informational only and not applicable to any Audi warranty.
© 2015 Audi of America, Inc.
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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
Additional Information
All parts and service references provided in this TSB (2027773) are subject to change and/or removal. Always
check with your Parts Department and service manuals for the latest information.
More diagnostic assistance on this system can be found in the following resources:
• All Models: TSB 2023322: 94 Different color shades in LED daytime running lights
• 2010 – 2011 Audi Q7: TSB 2022410: 94 Right daytime running light is inoperative in Coming Home mode
(DTC 02746/007)
• 2009 – 2010 A6: TSB 2023287: 94 LED daytime driving light inoperative on one side
© 2015 Audi of America, Inc.
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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.