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NHTSA ID Number: 10250638

Manufacturer Communication Number: 970143

TSB/Document Date: 2024-02-26


Summary

Modular Infotainment Platform (MIB)


Sound
processor

MOST interface

Schematic diagram of radio tuner for Standard MIB (MMI® radio) for NAR market

618_044

MMI® display/Driver Information System
8

High-spec MIB
The analog radio receiver for the High-spec MIB (MMI®
Navigation plus and MMI® Navigation plus with AudieBay logo
connect) has three separate receivers (tuners) in total. That
means that both the station search and the diversity
antenna function take place simultaneously.

The separate station memory can be used to create a personalized station list. It can store up to 50 stations from any
reception area and lists them in the user-defined order.

During FM reception, the selected station is always simultaneously received by Tuners 1a and 1b. The two signals are
then merged to form a combined signal. As a result, the best
possible reception is obtained.

The radio supports the Radiotext and Radiotext Plus data
services. This enables program related information (for
example, artist, title, current program) to be displayed if
broadcast by the station concerned.

Tuner 2 functions as a separate tuner for AM/FM station
searching and for receiving TMC*data and monitoring voice
traffic reports. It is not used for audio reception of the radio
station currently selected. Because the station search function is constantly active, the main screen of the FM radio
menu always shows all FM radio stations currently receivable. The station list is thus kept permanently up to date and
unavailable stations removed from the list.
AM reception is provided by Tuner 1a. Tuner 2 is an
additional AM tuner which constantly updates the AM
station list in the background.
Display of radio menu during FM reception

Sirius XM tuner

618_045a

Sirius XM decoder
Audio
amplifier

Tuner 1a
AM/FM

FM phase
diversity unit

Tuner 1b
AM/FM

RDS

HD decoder

Tuner 2
AM/FM

RDS decoder
Sound
processor

MOST interface
Navigation

618_047

Schematic diagram of radio tuner for High-spec MIB
MMI® display/Driver Information System

9

Disk drives and storage media
Depending on the MIB version, the following drives and
storage media are incorporated in Information Electronics
Control Module 1 J794:




Optical drive (CD/DVD)
Memory card reader
SSD solid state drive
SIM card reader

In addition, optional features available on the Standard MIB
and High-spec MIB allow various storage media (for
example, USB sticks) to be used via the Audi music interface.

618_007

Front panel of J794 for High-spec MIB without
Audi connect (MMI® navigation plus)

Front panel of J794 for Standard MIB, (AudieBay logo MMI® radio) 618_005

J794

618_008

Media playback
Audio and video files in the most commonly used formats
can be played back via the various drives and the Audi music
interface.

The list below details the properties of the audio and video
files supported.

Audio files
Windows Media
Format

MPEG*-1/-2

Windows Media

Audio 9

AAC-LC, HE-AAC,

Layer-3

Audio 8 and 9

Lossless, WMA 9

HE-AACv2

OGG* Vorbis

FLAC*

WAVE*

.ogg

.flac

.wav

pro & WMA 10
File extension
Standard MIB

.mp3

ü
ü

High-spec MIB

.wma

.asf*

ü
ü

.wma

.aac, m4a*, m4b*

ü

ü
ü

ü

ü

ü

ü
ü

Video files

Format

File extension
High-spec MIB

10

MPEG-1*,
MPEG-2*
.mpg, mpeg

ü

MPEG-4 (ISO)

DivX* 4, DivX 5

Xvid*

.mp4, m4v, .avi*

.avi, divx

.avi

ü

ü

ü

MPEG-4*-AVC
(H.264)
.mp4*, .m4v*, .mov

ü

WMV9*

MJPEG

.wmf, .asf

.avi, .mov

ü

ü

Audi music interface
With the Audi music interface, a video source can be connected directly to the Standard MIB or High-spec MIB. That
means that video playback on the MMI® display is also
possible on the Standard MIB. There are two adaptors
available for this purpose:


AV adaptor cable
iPod adapter cable plus

AV adaptor cable 4F0.051.510.N

iPod adaptor cable plus 4F0.051.510.R

618_053

618_085

!

Note
DRM* (Digital Rights Management) protected files cannot be played back.

11

iPod adapter plus
The iPod adapter plus is more than a cable connection
between the AMI and the iPod. Rather it is an active interface with special hardware and software. A special Apple
authentication chip is built into the housing of the iPod
connector plug in the iPod adapter cable plus. This chip
contains the software needed in order to enable additional
functions. The authentication chip is used to check which
functions the device connected to the iPod Information
Electronics Control Module J794 is allowed to use.
The iPod adapter plus can be distinguished from prior versions by a red anti-kink device on the AMI connecting plug as
well as a large housing at the iPod connecting plug.

iPod adapter cable plus

602_085

The iPod adapter plus (4F0.051.510R) is available for 2015
and later vehicles with the following optional equipment:


Radio Media Center with AudieBay logo music interface (AMI)
MMI® 3G Plus with AudieBay logo music interface (AMI)

The iPod adapter plus supports the following functions:



Audio streaming
Cover display
Video streaming

All information embedded in an audio file (for example,
track, album, artist) is displayed. If a cover is available for a
track currently playing on the iPod, this is also displayed.
The video streaming function can be used to play back video
files. Films, broadcasts, music videos, video podcasts and
rented films can be played on an iPod.
As a safety precaution, the video screen is disabled while
driving.

Audio playback display

602_029a

Video menu display

602_030a

The following Apple products running the following firmware (FW) version or higher are currently supported:


iPod Nano 5G running FW 1.0.2
iPod Nano 6G running FW 1.0.0
(limitation: video is not supported)




iPod Touch 1G running FW 3.0.0
iPod Touch 2G running FW 3.0.0
iPod Touch 3G running FW 3.0.0
iPod Touch 4G running FW 4.0.0




iPhone 1G running FW 3.0.0
iPhone 3G running FW 3.0.0
iPhone 3GS running FW 3.0.0
iPhone 4G running FW 4.0.0

iPad 1G and 2G running FW 4.2.1

Note
Further information about supported iPod versions and in-car functions can be found in the Mobile devices
database at: www.audi.com/bluetooth or www.audi.com/mp3.
12

Optical drive
The optical drive is either a CD drive or a DVD drive, depending on the MIB version.
A CD drive can only play audio files. The CD drives support
both single-session and multi-session rewritable CDs.
A DVD drive can play both audio and video files. They also
support both single-session and multi-session rewritable
CDs. Only single-session recordable DVDs are supported.
The list below details the formats supported.

Audio CD
Supported media
Standard MIB
High-spec MIB

Up to 80 min

ü
ü

Optical drive

618_054

CD-ROM

Audio DVD

CD-R*; CD-RW*

"DVD-Video

DVD±R*;

Up to 700 MB capacity

compatible DVD-Audio"

DVD±RW*

ü
ü

Video DVD

ü

ü

DVD-ROM

ü

SD card reader
The SD card readers support SD*, SDHC* and SDXC* memory
cards depending on the MIB version.
Memory card capacity of up to 64 GB is possible depending
on MIB version.
SD card reader

!

618_055

Note
If using an SDXC memory card, it must be formatted with the exFAT* file system.

13

Solid state drive
The High-spec MIB is equipped with a solid state drive
(SSD*). SSDs are the same type of memory used for example,
in USB sticks.
The solid state drive in the High-spec MIB has a theoretical
capacity of 64 GB.

The data stored on it includes the following:




Music and video files on the Jukebox
Navigation maps
Voice control files
Google EarthTM image data

Jukebox
The Jukebox is provided for storing music and video files. A
maximum of 3,000 files can be stored in the Jukebox. The
actual number of files depends on the compression. The
capacity of the Jukebox on the 2015 Audi A3 is approximately 11 GB.

The files can be read and imported into the Jukebox via the
following interfaces:



DVD drive in J794
SD card reader in J794
Medium connected to USB connection of AudieBay logo music interface
(USB stick, USB external hard drive etc.)

Music on audio CDs and videos on video DVDs cannot be
imported. DRM-protected files cannot be read.

Jukebox menu

618_057a

Album browser

618_031a

SIM card reader

618_059

SIM card reader
The minieBay logo-SIM card reader is only installed on the High-spec
MIB system with the Audi connect option.

14

Front Information Display Control Head J685
On the Modular Infotainment System, an LVDS* signal is
used for video transmission from Information Electronics
Control Module 1 J794 to Front Information Display Control
Head J685.

J794 is connected to Front Information Display Control Head
J685 via a private sub-bus CAN system. This CAN bus has a
data transmission rate of 500 kbit/s. J794 uses it to control
and monitor system statuses on the MMI® display (for
example, On/Off, temperature, error status, etc.)

With the Standard MIB, the video output resolution is 400 x
240 pixels, and on the High-spec MIB 800 x 480 pixels.

5.8" display for Standard MIB

618_019

7.0" display for High-spec MIB

618_036

Front Information Display Control Head J685

Terminal 30
Terminal 31

Shield
Ground

Ground

LVDS +

LVDS -

Private CAN High
Private CAN Low

Information/entertainment
CAN High
Information/entertainment
CAN Low

Information Electronics Control Module 1 J794

Connection concept for MMI® display J685

618_037

15

Video transmissions to J794
Video signals from up to four different sources for can be
viewed on the MMI® display.

Terminal device on Audi music interface
(AMI)



With the AMI, a distinction is made between two possible
video sources. They transmit the video signal by two different routes:

TV tuner R78 (not for the US market)
DVD changer R161 (High-spec MIB only)
A terminal device (for example, iPod) connected to the Audi
music interface (AMI)
Rear View Camera System Control Module J772

The images from the various sources are transmitted to J794
via different routes.

TV Tuner R78 and DVD Changer R161
The TV Tuner R78 and the DVD Changer R161 send the
video signal to J794 via the MOST bus. (TV Tuner R78 is
not available in the North American region.)

1. Video sources that provide finished images as an FBAS*
signal. Example: an image transferred from an iPod using
the iPod adapter plus (red kink preventer) to the J794 via
the FBAS connection on the AMI connector.
2. Video sources that provide a video file. Example: a video
file on a USB stick is transferred to the J794 using the
USB adapter connected to the USB socket on the AMI.
The J794 then converts the file into a video.

Rear View Camera System Control
Module J772
The images from J772 are sent to J794 as finished images
via a dedicated FBAS lead.
FBAS lead (-)
Video input from J772

FBAS lead (+) from
AMI connector
FBAS lead (-) from
AMI connector

Video output for MMI® display

1234

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TSB/Document ID: 970143

Replacement Service Bulletin Number:

MFR Communication Date: 2013-12-01

MFR Internal Campaign ID/Software Version:

Communication Type: Service Bulletin/Repair Instructions

NHTSA Components: EQUIPMENT:ELECTRICAL:INFOTAINMENT

MFR Component System:

MFR Component Subsystem:


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