Sunday, January 31, 2021

******** Audi TTS Quattro Roadster (8J9) L4-2.0L Turbo (CDMA) Technical DIAGNOSIS AND REPAIR # 911120 Date: 111021


Audio System - Rattling/Humming Noise From Speakers



91 Sound system: interference



91 11 20



2018187/6



October 21, 2011.



Supersedes Technical Service Bulletin Group 91 number 10 - 55 dated August 20, 2010 for reasons listed below.



Affected Vehicles



Condition



Cracking, grinding, rattling, humming or similar interference from one or more loudspeakers.



Technical Background



Parts of the interior fittings such as door covers, rear shelf, facings or covers can be made to vibrate at certain frequencies and then cause noises. It is



possible that loudspeaker brackets, cables or covers can be made to vibrate.



Production Solution



77



Not Applicable.



Service



1. Verify if interferences come from loose objects (such as keys, CD covers, pens, sunglasses, etc.) in the vehicle. If the interference is not coming



from loose objects, proceed to 2.



2. Verify if interferences disappear when the trim surrounding the speaker is pushed against the speaker or the speaker against its mounting. If the



interference does not disappear with pressure, proceed to 3.



3. Remove loudspeaker from its mounting and listen to the loudspeaker outside of vehicle. If the sound from the speaker does not exhibit the



concern, then do not replace the loudspeaker and proceed to 4.



4. Check if interferences come from parts of the cabin fittings. Loose parts should be fixed, an underlay applied, or, if necessary, replaced.



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.