2001 AUDI A4 Technical Features Design And Function

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65
Radio chorus II, concert II and symphony II
In the new Audi A4, the new generation of
radios, chorus II, concert II and symphony II
are available as options.
The following functions have been optimised:
– AM has been extended to include long
wave.
– There are now 12 programmable stations
for AM and FM.
All three radio versions are compatible with
the external CD changer (optional).
The optional CD changer is now built into the
glove compartment.
The BOSE sound system can be ordered as an
optional extra for all radio systems of the new
generation.
The connection of the new generation of
radios to the data bus information system
enables the exchange of large volumes of
data with other systems.
This makes new functions such as e.g.
convenience radio coding possible.
Thanks to the convenience radio coding, man-
ual deactivation of the radio anti-theft lock
following a loss of the power supply is no
longer necessary.
A prerequisite is that the radio is built into the
same vehicle.
Sound quality is enhanced by the installation
of a central loudspeaker in the centre of the
dash panel as well as a sub-bass speaker
under the rear shelf.
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SSP254_106

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In order to improve sound quality, acoustic
curves related to vehicle type are stored in the
concert II and symphony II radios.
The acoustic curves are set in the control unit
coding function of the radio systems.
In addition, the sound settings for the FM, AM
and CD modes are stored separately in the
concert II and symphony II radios. Conse-
quently, the various level controls do not
require resetting each time the driver
changes modes.
Radio chorus II
New functions with respect to the predeces-
sor model include:
– Skip title function
– Scan function
– Dolby noise suppression
in the cassette player as well as
– a sorting function within a radio station
family
in the convenience radio tuner search func-
tion.
Radio concert II
A single speed CD player is integrated in the
concert II radio.
The cassette player has been discontinued.
Radio concert II and symphony II
The improved radio traffic news memory in
the Radio concert II and symphony II allows
the driver to program the time for starting the
two-hour recording of traffic news announce-
ments. Two timers are available, which can be
programmed individually.
Example:
The driver can set the starting time for the
recording of radio traffic news announce-
ments for the drive to work in the morning
and for the drive back in the evening sepa-
rately.
Radio reception is improved in the concert II
and symphony II radios by the use of the
M
ulti
C
ommunication
B
ar (MCB) with inte-
grated aerial diversity.
For further information on the aerial module,
please refer to 72.
Electrical system
SSP254_009
SSP254_007

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67
Radio symphony II
A 6x CD changer as well as a cassette player
are integrated in the symphony II radio.
Searching for alternative frequencies is
speeded up by the use of a second tuner. The
second tuner also allows for Traffic Message
Channel (TMC) evaluation in the background.
For further information, please refer to the
relevant operating instructions.
CAN networking in the new generation of
radios
All three radio versions are connected to the
data bus information system.
Important signals via the data bus informa-
tion system:
SSP254_006
– Ignition on/steering column-
electronics
– Ignition key inserted/steering
column electronics
– Switch illumination/dash panel
insert
– Display illumination/dash panel
insert
– Speed/dash panel insert
– Convenience coding/dash panel
insert
– Vehicle identification/dash
panel insert
– Prompt signal/data bus informa-
tion
– Data bus system information/
dash panel insert
– Time/dash panel insert
– Control signals from multi-func-
tion steering wheel/steering
column electronics– Display functions/dash panel
insert
– Sleep signal/data bus informa-
tion
– TMC data for symphony II/
navigation system
– Convenience coding request/
dash panel insert
Inputs/sourceOutputs/receiver

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Example:
If the radio is switched on with the ignition
key (S-contact) this requires the exchange of
data between three control units:
– Steering column electronics,
– dash panel insert (gateway) and
– radio.
If the radio does not switch on,
– the signal input in the steering column
electronics (terminal 86S),
– communication between the steering col-
umn electronics and the dash panel
(convenience data bus) and
– communication between the dash panel
and the radio
(data bus information system)
must be checked.
Diagnostics
For diagnosis of radio systems concert II and
symphony II, current consumption of aerial
diversity is monitored via the intermittent
frequency (IF) wiring.
Test mode
The new radio versions are equipped with a
test mode.
Activating field intensity measurement:
– Radio switched off
– Hold down key 1
– Switch on radio
Activating GALA display volume increase:
– Radio switched off
– Hold down key 2
– Switch on radio
Electrical system
SSP254_119
SSP254_120
Field intensity -
mean value
Increase in dB Button 1
Button 2
For further information on IF wiring,
please refer to SSP 213, Page 54.
FM 1 DOT + 88.9
34300033 TP AF

GALA 0dB

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Navigation IV and Navigation Plus-D
The new Navigation System IV and Navigation
System Plus-D are equipped with the dynamic
routing system.
The following traffic hold-ups are taken into
account during route planning:
– closed roads
– tailbacks and
– slow-moving traffic.
The system’s sources of information are the
traffic information from the radio stations via
the Travel Message Channel and from the
telematics
®

(optional) via the telephone
connection.
Once it is switched on, the navigation system
takes account of the traffic messages within a
radius of approx. 50 km around the vehicle.
If the route planning is activated, any hold-
ups are taken into consideration.
New hold-ups which arise are immediately
accounted for in the routing and the driver is
re-routed.
Data transfer of the traffic data is by
– Travel Message Channel data from the
radio
– Telephone data from the telematics control
unit J526
to the navigation system via the data bus
information system.
Selectivity area for traffic
messages, 50 km
major diversion
Tailback
local diversion
SSP254_129
SSP254_113

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TELE
RETURN
INFO
NAV
Menu

Within the menu structure of the navigation
system, the driver is able to
– switch the dynamic routing on and off,
– select the source of traffic information,
– manually exclude route sections from the
route planning.
For further information, please refer to the
operating instructions.
Travel Message Channel (TMC)
The TMC is a component of the Radio Data
System (RDS), which is transmitted by the
radio stations.
The information in the TMC includes the loca-
tion, type and duration of traffic hold-ups
reported by the police, automobile associa-
tions and government authorities in a coded
form standard throughout Europe.
The TMC data is not currently transmitted by
all radio stations.
This requires the use of a second tuner in the
radio or in the interface of the Navigation
System Plus.
As only the symphony II radio is equipped
with a second tuner, the use of TMC data for
dynamic routing is only possible with this
version.
Dynamic routing in conjunction with the
chorus II and concert II radios is only possible
by means of the traffic messages via tele-
phone with telematics
®

.
Diagnostics
The navigation system diagnostics is interro-
gated via the L-wire.
Electrical system
SSP254_130
1 Traffic information is available.
Source: Radio
Alternative route Traffic information
now automatic
for route section
for route from hereread
interrogate latest
Settings
Tailback function Back with RETURN

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Interface for Navigation Plus (R94)
The interface of the Navigation System Plus
performs the following tasks:
– Exchange of data bus information -
Navigation System Plus internal data bus
– Transfer of TMC data to the Navigation
System Plus for dynamic route planning
In order to receive the TMC data, an interface
connects the aerial and radio.
The following data is exchanged via the
interface:
Display request/instrument cluster
Traffic news/Telematics
Fault messages/card reader
Control signals/multi-function
steering wheel
Terminal 15/steering column
electronicsDisplay/instrument cluster
Control signals data bus/data bus
information system
Vehicle data/card reader Input from data bus
information/senderOutput to data bus
information/receiver
SSP254_122

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TS
TS

Multi-communication bar (MCB)
The Audi A4 Saloon features the multi-com-
munication bar in the top part of the rear win-
dow for the first time.
The
– aerial module,
– aerial for navigation system (GPS),+
– and aerial for telephone (GSM)
are fitted in the MCB.
The
– aerial diversity,
– aerial amplifier for the four radio aerials
(FM1-4, AM),
– 4 aerial amplifiers for the TV aerials 1-4,
– aerial for radio remote control, central lock-
ing (RCL),
– and the aerial for the telestart function (TS)
of the auxiliary heating
are integrated in the aerial module.
The aerial conductor is located in the rear
window. The electrical connection between
the aerial amplifier and the conductor on the
rear window is made by means of spring
contacts.
Both the GPS and the GSM aerials are also
fitted in the top edge of the rear window, but
these are not connected by means of conduc-
tors in the rear window.
Thanks to this compact arrangement, no
aerials are visible from outside.
The emergency aerial for the telematics is
located at the rear bumper.
Electrical system
SSP254_109
SSP254_013
GSMGPS
Aerial module
Normal glazing
Insulating glazing