A941328 2028277-

Service Bulletin Details

Public Details for: A941328 2028277-

Supersedes technical service bulletin group 94 number 13-24 dated july 18, 2013. There is considerable moisture present in the headlamp. The moisture disappears only after extended drives (greater than 10 minutes). There is no external dama


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Technical Service Bulletin
94 Moisture accumulation in headlamps
94 13 28 2028277/9 August 13, 2013. Supersedes Technical Service Bulletin Group 94 number 13-24 dated July
18, 2013 for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
Q7
2010 - 2014
All
Not Applicable
Condition
REVISION HISTORY
Revision
Date
Purpose
9
-
Revised Warranty (Updated Labor Operations)
8
7/18/2013
Revised Required Parts and Tools (Added alternate part numbers)
7
7/3/2013
Revised Service (Added sealing ring instructions; removed butyl cord
instructions)
Revised Required Parts and Tools (Removed butyl cord sealant; added
sealing ring)
6
3/6/2013
Revised Service (Added information on vent tube)
5
1/2/2013
Revised Service (Added air duct install)
Revised Warranty
Revised Required Parts and Tools
• There is considerable moisture present in the headlamp
(Figure 1).
• The moisture disappears only after extended drives (greater
than 10 minutes).
• There is no external damage to the headlamp which could
introduce moisture.
Figure 1. Moisture in headlamp.
© 2013 Audi of America, Inc.
Page 1 of 7
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
Humid air settles on the inside of the glass, causing moisture to appear on the inside of the headlamp lens.
Because of the headlamp circulation system, outside air is allowed to flow through the headlamps. The open,
water-protected ventilation system (needed for pressure compensation) creates different “climate zones” inside
the headlamp, where the lens is either warmed up by the light or cooled down by passing air.
When high air humidity and temperature differences exist between the inside of the headlamps and the outside,
condensation can form on the inside of the lens, especially in cold and wet weather. This moisture buildup can
happen, for example, after a car wash, after steam cleaning of the engine or the front end, or after overnight
temperature changes.
This condition is more easily visible with headlamps made from clear glass. The moisture is an optical condition
which does not affect the headlamp function (light performance) and does not lead to corrosion or damage of the
internal headlamp parts.
This condition is common to all exterior vehicle lights, and can occur on every headlamp, fog lamp, or rear lamp.
Production Solution
• Optimized headlamp ventilation hose placed into production for all xenon headlamps.
• Charge air ducts placed behind intercoolers.
Service
1.
Remove the headlamps and dry the inside using compressed air or a hot air blower. Check for any loose
caps, loose or unsealed control modules, or cracks in the headlamp housing(s) as the culprit of moisture
exposure.
2.
If the vehicle’s build is prior to VIN # *CD004736 and the updated ventilation hoses are not currently installed,
replace the headlamp ventilation hose for each headlamp with the new part number to help reduce any further
humidity ingress into the headlamps (see Required Parts and Tools, below). Proceed to step 3.
Tip: The updated ventilation hose can be recognized
by the integrated filter (Figure 2, arrow).
Figure 2. Updated ventilation hose with
integrated filter.
© 2013 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
Tip: The updated ventilation hose is not connected
directly to the headlamp housing. The house routes
downward from the headlamp carrier and between the
radiator and bumper (Figure 3, arrow).
Figure 3. Mounting of updated ventilation hose.
3.
Each headlamp air ventilation tube must be sealed to
protect against further moisture ingress (Figure 4).
Figure 4. Headlamp ventilation guide tube.
4.
Install ring seal on headlamp air ventilation tube (Figure 5).
The larger diameter of the seal faces the headlamp.
Figure 5. Ring seal installed on headlamp air
tube.
© 2013 Audi of America, Inc.
Page 3 of 7
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
5.
Reinstall headlamps.
Tip: If the headlamps were removed after butyl cord or other rubber type of sealant was already applied
to air tubes from a prior procedure, remove the old sealant before installing headlamps.
6.
Check vehicle for left and right air ducting for exiting air behind charge coolers. Vehicles built from June 2010
will not have these exit air ducts installed. Check vehicle regardless of build date. If air ducts are not installed,
continue with steps 7 – 11. Otherwise, proceed to step 12.
7.
Remove front wheels and wheel housing liners. The rear
of the charge air coolers will be exposed (Figure 6).
Figure 6. View of charge air cooler with wheel well
liner removed.
8.
Locate exit air duct attachment hooks on the left and right
air charge coolers (Figures 7 and 8).
Figure 7. Lower exit air duct attachment point to
charge air cooler.
© 2013 Audi of America, Inc.
Page 4 of 7
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
Figure 8. Upper exit air duct attachment points to
charge a cooler.
9.
Affix left and right exit air ducts over the rear of the charge
air coolers (Figure 9).
Figure 9. Charge air cooler exit air duct installed.
10. Inspect exit air duct attachment points to be sure that
ducts are engaged properly over charge air cooler hooks
(Figure 10).
Figure 10. View of exit air duct affixed to mounting
hook.
© 2013 Audi of America, Inc.
Page 5 of 7
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
11. Reinstall wheel well liners and wheels.
12. Please inform the customer the new ventilation hoses and sealant are only to help reduce the moisture
condition, but will not eliminate the condition completely. Moisture in the headlamp lens is normal and can
occur even with the improved filtration.
Warranty
Claim Type:
Use applicable claim type. If vehicle is outside any warranty, this Technical Service
Bulletin is informational only.
Service Number:
9415
Damage Code:
0010
Labor Operations:
Remove and reinstall both headlamps
9415 2001
50 TU
Modify both headlamps and mounting
9415 5099
40 TU
Installation of left and right air ducts
6616 2000
90 TU
Diagnostic Time:
GFF – Checking and clearing fault codes included No allowance
in existing labor operations
0 TU
Road test prior to service procedure
No allowance
0 TU
Road test after service procedure
No allowance
0 TU
Technical diagnosis at dealer’s discretion
(Refer to Section 2.2.1.2 and Audi Warranty Online for DADP allowance details)
Claim Comment:
As per TSB #2028277/9
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.
© 2013 Audi of America, Inc.
Page 6 of 7
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
Required Parts and Tools
Part Number
Part Description
Quantity
4L0941717A
Left Headlamp Ventilation Hose
1 (if necessary)
4L0941718A
Right Headlamp Ventilation Hose
1 (if necessary)
4L0941123
Sealing Ring
2
7P5117339D (if not available, use 7L0117339)
Left charge air cooler exit duct
1 (if necessary)
7P0117340 (if not available, use 7L0117340)
Right charge air cooler exit duct
1 (if necessary)
Additional Information
The following Technical Service Bulletin(s) will be necessary to complete this procedure:
• TSB 2012749, 94 Exterior lights, moisture accumulation
All parts and service references provided in this TSB (2028277) are subject to change and/or removal. Always
check with your Parts Department and service manuals for the latest information.
© 2013 Audi of America, Inc.
Page 7 of 7
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.


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