Technical Service Bulletin
94 LED Daytime Running Light Diagnosis Tips
94 12 96 2027773/3 November 1, 2012. Supersedes Technical Service Bulletin Group 94 number 12-69 dated
March 15, 2012 for reasons listed below.
Model(s)

Year

A3

2010-2012

A4

2009-2013

A5

2008-2013

A6

2012-2013

A7

2012-2013

A8

2011-2013

Q5

2009-2013

Q7

2010-2013

R8

2008-2013

TT

2010-2013

VIN Range

Vehicle-Specific Equipment

All

LED Daytime Running lights

Condition
REVISION HISTORY
Revision

Date

Purpose

3

-

Revised Service (Model clarification)

2

3/15/2012

Revised header date (Added model years)
Revised Service (Adjusted diagnosis procedure)

1

10/12/2011

Original publication

Part or all of the daytime running lights do not work on vehicles with LED DRLs.
For vehicles with halogen DRLs, please reference TSB 2017488, 94 Halogen Daytime running lights do not work.

Page 1 of 4
© 2012 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 Service Bulletin
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 a DTC is listed in J519 related to daytime running lights, follow the respective test plan before
proceeding with this bulletin.
2. If both front DRLs are inoperative, verify the DRLs are turned on via the vehicle system option:
 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 DRLs will be off. This functionality cannot be changed.
 A4 (8K), A5, A6, A7, A8, Audi Q7:
In vehicles with MMI, the daytime running lights are switched on via the menu option Exterior light
control or Exterior Lighting.
See also the owner's manual of the respective vehicle types.

Page 2 of 4
© 2012 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 Service Bulletin
3. If one or several LEDs are not
illuminated (Figure 1), the
affected headlight assembly
must be replaced. The LED light
strip is not a serviceable item.
Tip: Only the headlight
assembly needs to be replaced.
Any headlight control modules
can be reused.

Figure 1. An un-illuminated LED in the headlight assembly.
4. If all DRL LEDs in one headlight assembly are inoperative, there are typically two possible causes:
 LED circuit board.
 DRL control unit, located inside the headlight assembly.
Tip: For 2009 – 2010 Audi Q5 vehicles, please follow TSB 2020780, 94 One or more Daytime

Running Light LEDs in one headlight assembly are inoperative.

A3, A5 (2008-2012), and TT vehicles do not have serviceable DRL control units, as these modules are
integrated into the headlight. On these vehicles, the entire headlight assembly must be replaced.
For other vehicles, in order to verify the root cause, swap the DRL control units between the two
headlights.
 If the problem is no longer present, leave the control units on the currently installed side, and release
the vehicle. Manufacturing differences between components can sometimes lead to concerns that
can be remedied simply by exchanging right and left control modules.
 If the problem follows the suspect DRL control unit, replace the DRL control unit.
 If the problem does not follow and remains on the original side, verify all headlight connections, and
replace the headlight with the inoperative LED.

Page 3 of 4
© 2012 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 Service Bulletin
Warranty
This TSB is informational only and not applicable to any Audi warranty.

Additional Information
All parts and service references provided in this TSB 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

Page 4 of 4
© 2012 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.