2005 AUDI A6 radio antenna

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326_027
Display and
operating unit for
front information
J523Te l e p h o n e
transmitter and
for telephone
R36
CD changer
R41
Digital
sound package
J525
Switch for
access and
start authorisation
E415Antenna read-in
unit for keyless access
authorisation
J723
Wiper motor
J400Sensor for rain and
light detection
G397
Passenger
compartment
monitoring
G273Alarm horn
H12
Fresh air fan
J126Refrigerant pressure and
refrigerant temperature
G395
Tr a n s m i t t e r,
front left
G431Tr a n s m i t t e r,
front right
G432Tr a n s m i t t e r,
rear left
G433Transmitter,
rear right
G434Antenna, rear
R96 Te l e p h o n e /
telematics
J526Handset
for telephone
R37
Navigation
with CD drive
J401
TV tuner
R78
Radio module
RVoice input
J507
MOST bus
CAN Instrument cluster
CAN Diagnosis
CAN Drive
CAN Convenience
CAN Distance control
LIN bus
Various sub-bus systems
Wireless transmission
– Bluetooth signal

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Division of functions
System control is broken down into three basic
modules:
– the control unit for access and
start authorisation J518,
– the antenna read-in unit for keyless access
authorisation J723 and
– the switch for access and
start authorisation E415.
All three components communicate with each other
over a local single-wire bus.
The control unit for access and start authorisation is
the master of the system and a participant on
Convenience. The same control unit is installed for
all system versions.
The antenna read-in unit for keyless access
authorisation is only installed with the
Advanced Key option. It serves as the interface
between the antennae, sensors and the control unit
for access and start authorisation.
The switch for access and start authorisation is
installed in various versions, depending on the
transmission, radio frequency of the central locking
system and the Advanced Key option. An evaluation
electronic device is also integrated into the switch.
Convenience electrics
326_064
Access and
start authorisation
J518Antenna read-in
unit for
keyless access
authorisation
J723
Switch for
access and start
authorisation
E415

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Vehicl e ke y
The key has a mechanically coded hinged bit for the
lock cylinder in the driver’s door and the tailgate/
boot lid. The transponder function is integrated into
the electronics and also works without a battery.
An integrated battery powers the electronics for the
radio remote control and Advanced Key functions.
A new feature here is the bi-directional data
exchange between the radio-control key and the
control unit for access and start authorisation via
the antenna for central locking and anti-theft
warning system R47. This is used to transfer the
status of the central locking system into the key.
If a button outside of the function range of the key
is pressed, the LED integrated in the key shows the
lock status of the vehicle. The lock status displayed
is always the status, which was achieved using this
key when central locking was last actuated.
If the vehicle is opened or locked in the interim
period using a second key, this does not change the
lock status in the first key.
Furthermore, the radio frequency is changed from
433 MHz to 868 MHz for the first time in many
countries. This radio frequency is ideal for data
communication between vehicle keys and the
control unit.
Since this frequency can only be used for very short
transmission pulses, any interference from
long-term radio transmitters, such as baby phones,
wireless headsets, etc. is eliminated.
326_138
326_058 Vehicle within key range
Vehicle outside of key range,
last vehicle status is locked Signals from the key LED
Vehicle outside of key range,
last vehicle status is not locked
Approx. 4 seconds on
off
on
off
on
off

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Four transmitting antennae are distributed in the
vehicle and are used by the vehicle for radio
communication with the vehicle key. The antennae
transmit on a frequency of 24.5 kHz. The vehicle key
evaluates all four signals and determines the
position in or on the vehicle based on the field
strength of the individual antennae.
The antennae are located:
–in the rear doors
–in the centre console
–in the rear bumper
The start/stop button works in the same way as the
button module, which was first used in the A8 ‘03.
For safety reasons, the button positions are
evaluated both by the control unit for access and
start authorisation and by the switch for access and
start authorisation signal.
Antennae for access and start authorisation E134 - R138
Button for access and start authorisation E408
326_086 326_098

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MMI Basic
Standard equipment in the new Audi A6 includes
MMI Basic with the MMI operating concept, a
7" monochrome display (J685) in the dash panel
inser t as well as an integrated, analogue radio tuner
and 4x antenna diversity, CD drive and a 2x20-watt
amplifier.
In principle, these drivers are available in all
versions of the control unit for front
information J523.
In the MMI Basic version, the loudspeakers that are
integrated into the front doors are connected
directly to the control unit for front
information J523.
If the Standard Sound System or BOSE option is
installed, this internal amplifier is deactivated via
coding. The loudspeakers are then connected to the
relevant digital sound package control unit J525.Digital tuner technology will be available in the
Audi A6 at a later date. Depending on the market in
question, a satellite radio receiver or a receiver for
terrestrially emitted, but digitally coded
transmissions will then be available.
Legend
The orange symbols represent the possible optional
equipment. If a relevant option is missing, simply
follow the route indicated by arrows to close the
MOST ring.
326_042 Front information
are used
in the tester
J685Multimedia
operating unit
E380Antenna booster
R24Loudspeaker
front
Control unit for front information J523
+ Radio R
+ CD player R89
+ Amplifier R12 (active)Loudspeaker
DSP amplifier
J525
DSP amplifier
BOSE
J525
Loudspeaker
CD changer
R41 Te l e p h o n e
transmitter and
for telephone
R36 Data bus diagnosis
interface
J533Antenna
amplifier 2
R111
Steering column
electronics
J527Multi-function
steering wheel
J453

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MMI Basic Plus
As an option, the MMI Basic system can be
equipped with additional functions in the radio and
sound field in the form of a "Plus" version.
This includes, for example, a TP Memo function,
which enables the recording of traffic
announcements for a duration of eight minutes in
total.
A programmable recording period can be used to
provide up-to-date traffic announcements before
starting a journey. Stored traffic messages are
automatically deleted after six hours to ensure that
they are always up-to -date. Instead of the integrated
amplifier, the standard sound system with its own
digital sound package control unit J525 will be used
as standard as of this MMI version.
The internal amplifier can be deactivated via coding
in this and later MMI versions.
Infotainment
Legend
The orange symbols represent the possible optional
equipment. If a relevant option is missing, simply
follow the route indicated by arrows to close the
MOST ring.
326_043 Front information
are used
in the tester
J685Multimedia
operating unit
E380Antenna booster
R24
Control unit for front information J523
+ Radio R
+ CD player R89Loudspeaker
DSP amplifier
J525
DSP amplifier
BOSE
J525
Loudspeaker
Te l e p h o n e
transmitter and
for telephone
R36 Data bus diagnosis
interface
J533CD changer
R41 Antenna
amplifier 2
R111
Reference
Please refer to the Driver’s Manual for
information on operating the enhanced TP
Memo function!
Steering column
electronics
J527Multi-function
steering wheel
J453

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MMI Basic Navigation
The MMI Basic Plus is available on request with a
basic navigation function. For this purpose, a
navigation module is integrated into the
information control unit J523. Optical route
guidance is provided on the central display in the
dash panel insert. The destination is entered using
the MMI operating system with its central knob/
pushbutton.
Audible directions for route guidance are also
output via the sound system.
The data required for navigation is read in via the
integrated CD drive.
Legend
The orange symbols represent the possible optional
equipment. If a relevant option is missing, simply
follow the route indicated by arrows to close the
MOST ring.
326_041
Front information
are used
in the tester
J685Multimedia
operating unit
E380Antenna booster
R24Antenna
amplifier 2
R111
Control unit for front information J523
+ Radio
+ Navigation with CD drive J401Loudspeaker
DSP amplifier
J525
Loudspeaker DSP amplifier
BOSE
J525
CD changer
R41 Te l e p h o n e
transmitter and
for telephone
R36 Data bus diagnosis
for data bus
J533Antenna for
Navigation
R50
Steering column
electronics
J527Multi-function
steering wheel
J453

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MMI High
The MMI High comes with the 7" colour display.
The standard equipment of the Top system in
Audi A6 ‘05 Infotainment includes an RDS dual-
tuner, the standard sound system and a 6x CD
changer in the glove compartment. As an optional
extra, this MMI version is also available with DVD
navigation, which is already used in the current A8
‘03, as well as the voice operator system with the
voice input control unit J507 as a plug-in module of
the radio module R.
Only in this MMI version can drivers choose
between the fixed telephone module and the mobile
baseplate. The well-known analogue TV tuner R78 is
also available at present as an optional extra.
Infotainment
Legend
The orange symbols represent the possible optional
equipment. If a relevant option is missing, simply
follow the route indicated by arrows to close the
MOST ring.
326_044 Front information
are used
in the tester
J685Multimedia
operating unit
E380
Control unit for front information J523Loudspeaker
DSP amplifier
J525
Loudspeaker DSP amplifier
BOSE
J525
CD changer
R41 Te l e p h o n e
transmitter and
for telephone
R36 TV tuner
R78
Te l e p h o n e /
telematics
J526
Handset
for telephone
R37 Radio
R
Vo ic e i n pu t
J507 Navigation
with CD drive
J401
Reference
Information on the DVD-based navigation
system can be found in the SSP 293,
Audi A8 ´03 – Infotainment.
Antenna booster
R24Antenna
amplifier 2
R111
Data bus diagnosis
interface
J533
Steering column
electronics
J527
Multi-function
steering wheel
J453