A911448 2036482-

Technical Service Bulletin
91 Volume of MMI system changes when vehicle is restarted
91 14 48 2036482/1 June 30, 2014.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
A6
2005 - 2009
All
Audi MMI navigation
Q7
2007 - 2009
All
Audi MMI navigation
A8
2004 - 2010
All
Audi MMI navigation
Condition
The volume of the radio, navigation announcements, or output of the Bluetooth telephone system changes when:
• The ignition is switched off, then switched back on.
• The volume is muted, then unmuted.
• The MMI is switched off by a long press of the volume knob, then restarted without an ignition cycle.
All vehicles with MMI 2G/3G/3G+/MIB Navigation are affected.
Technical Background
The MMI system adjusts the volume lower when it starts (to prevent startling the driver). Additionally, the MMI
system adjusts the volume higher (if the volume is set too low) so that the user can hear navigation prompts and
Bluetooth callers.
The MMI system uses a volume “range”, and the minimum and maximum volumes cannot be changed (neither by
the customer nor the dealer), as there is no customer-adjustable setting in the radio menu for volume maximum.
After the MMI system is switched off and then back on, a louder or quieter volume adjustment can be made. When
the MMI system is turned on, the currently-set volume is checked against the allowable volume range. If
necessary, the system adjusts the volume as follows:
© 2014 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
• A very low volume will be automatically increased to a
specified value, roughly corresponding to the setting
shown in Figure 1. This ensures that the navigation
prompts and Bluetooth callers can be heard after the
vehicle is restarted or volume is muted.
Figure 1: Minimum volume (approximate setting is
8, but can vary by model and MMI system)
• A very high volume will be automatically reduced to a
specified value, as shown in Figure 2. This ensures that
the customer is not surprised or annoyed by an excessive
startup volume.
Figure 2: Maximum volume (approximate setting
is 20, but can vary by model and MMI system)
• Medium volume settings remain unchanged, which is why the volume never changes for some customers.
Production Solution
Not applicable.
Service
Explain the Technical Background to the customer.
© 2014 Audi of America, Inc.
Page 2 of 3
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 (2036482) are subject to change and/or removal. Always
check with your Parts Department and service manuals for the latest information.
© 2014 Audi of America, Inc.
Page 3 of 3
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.