Technical Service Bulletin
91 MMI: Bluetooth does not work (adaption channel deactivated)
91 24 43 2074929/1 August 29, 2024.
Model(s)

Year

All Audi Vehicles 2009 – 2021

VIN Range

Vehicle-Specific Equipment

All

Audi models prior to MIB3 with hands-free

Condition
Customer states:
•

The customer’s cell phone or the fixed handset (only possible with PR# 9ZW) cannot be connected to the
vehicle via Bluetooth.

And/or
•

After replacing the control unit 1 for information electronics or performing a software update:
o

The vehicle’s Bluetooth function is deactivated and cannot be switched on via the menu. It is not
possible to connect a mobile phone to the vehicle.

o

The Bluetooth settings in the telephone menu are greyed out.

o

The value “1” (Bluetooth is switched off) is logged in diagnostic address 5F – control unit 1 for
information electronics (RMC) in measured value block 96/2 (Bluetooth status).

Technical Background 1
•

Vehicle delivered from factory with incorrect adaption of telephone control unit (diagnostic address 77) /
control unit 1 for information electronics (diagnostic address 5F).

OR
•

The “Replace control module” test plan was not used when the control unit was replaced.

OR
•

The existing activations were not restored after a software update.

Production Solution
•

Continuous process optimization.

OR
•

None, as the part replacement / update procedure wasn’t followed properly.

Service
If a mobile phone which has been tested for compatibility (see www.audi.com/bluetooth for list of phones that
have been tested), or the fixed handset cannot be connected to the vehicle via Bluetooth, the adaption channel
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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
for Bluetooth must be checked. On vehicles with MIB, it must also be checked if the existing activations have
been restored:
Vehicles with hands-free (CAN):
Check adaption channel 133 of telephone control unit (diagnostic address 77). Adaption channel 133 must have
the value “1”.
Adaption channel 133:
Value 0 = Bluetooth OFF
Value 1 = Bluetooth ON
In addition, adaption channel 134 must be checked and set to the desired value (factory setting: value 0).
Adaption channel 134:
Value 0 = Bluetooth is always active
Value 1 = Bluetooth is only active when the mobile phone is in the charging cradle
Vehicles with hands-free (MOST) or rSAP Bluetooth with MMI2G:
Check adaption channel 133 of telephone control unit (diagnostic address 77). Adaption channel 133 must have
the value “1”.
Adaption channel 133:
Value 0 = Bluetooth OFF
Value 1 = Bluetooth ON
In addition, adaption channel 134 must be checked and set to the desired value (factory setting: value 0).
Adaption channel 134:
Value 0 = Bluetooth is always active
Value 1 = Bluetooth is only active when the mobile phone is in the charging cradle
Vehicles with MMI3G or MMI3G+:
Check adaption channel 17 of control unit 1 for information electronics (address word 5F). Adaption channel 17
must have the value “1”.
Adaption channel 17:
Value 0 = Bluetooth OFF
Value 1 = Bluetooth ON
Vehicles with RMC:
Check adaption channel 09 of control unit 1 for information electronics (address word 5F). Adaption channel 09
must have the value “1”. The value “0” (Bluetooth is switched on) is then logged in measured value block 96/2
(Bluetooth status).
Adaption channel 09:

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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
Value 0 = Bluetooth OFF
Value 1 = Bluetooth ON
Vehicles with MIB:
Check adaption channel 51 of control unit 1 for information electronics (address word 5F). Adaption channel 51
must have the value “1”.
Adaption channel 51:
Value 0 = Bluetooth OFF
Value 1 = Bluetooth ON
If Bluetooth still does not work, restore the existing activations using the ODIS tester. Proceed as follows:
“Special Functions” => “SVM Activations” => “Restore already existing activations”

When replacing infotainment control units in future, always use the “Replace control module” test plan,
otherwise the function will not work correctly afterwards. On MIB vehicles, you must also restore the
existing activations after performing a software update.

Warranty
Claim Type:

•

If the vehicle is outside of any warranty, this Technical Service Bulletin is
informational only.

Service Number:

•

9189 for vehicles with hands-free universal preparation for mobile telephone
(address word 0077)

•

9196 for vehicles with control unit 1 for information electronics (address word
005F)

Damage Code:

AB39

Diagnostic Time:

GFF

0150 0010

See SRT with
associated operations

GFF

0150 0060

Time stated on the
diagnostic protocol

Claim Comment:

As per TSB 2074929/1

All warranty 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.

© 2024 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
Required Parts and Tools
Parts replacement not permitted.

Additional Information
All part and service references provided in this TSB (2074929) are subject to change and/or removal. Always
check with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check the
Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.
©2024 Audi of America, Inc. All rights reserved. The 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.

© 2024 Audi of America, Inc.
Internal

Page 4 of 4

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.