2001 AUDI A4 steering

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The following information and functions
are processed in the central convenience
electronics:
Crash signal
(from airbag control unit J234)
Handbrake switch F9
Tailgate release
– Button for release, tailgate lock
cylinder F248
– 3. Remote control button
– Switch for tailgate to F206
– Switch for central locking, tail-
gate F218
Anti-theft alarm (optional)
– Contact switch for bonnet F266
– Ultrasonic sensor for anti-theft
alarm G209
Aerial for remote control,
Central locking and anti-theft
alarm in multi-communication bar
Reversing lamp M17
When mechanical window lifters
fitted in rear
– Door contact signal
– Locking signal
– Safe signal
for rear doors
Fuel filler flap
– Motor for tank cap locking V155
Tailgate
– Motor for tailgate release V139
Anti-theft alarm (optional)
– Horn for anti-theft alarm H8
(sounder)
– Turn signal lights via data bus to
vehicle electrical system con-
trol unit J519
Interior light control
– Dimming of interior lighting
– Footwell light switching
(optional)
– Luggage compartment lamp
switching
Automatic closing/opening
– Window lifters via door control
units
– Sun roof
When mechanical window lifters
fitted in rear
– Lock rear door lock motors
– Safe rear door lock motors
– Activation of rear entry lights
(optional)
– Activation of rear door warning
lights
Enabling of door control units and
sunroof
Gateway function for diagnosis
– Control unit for vehicle electrical
system J519
– Steering column switch module
J527
Sensors Actuators Central convenience electronics (CCE)

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TS

Electrical system
The Audi A4 convenience system is available
with
– Anti-theft alarm
– Ultrasonic interior monitor
– Shattered glass sensor (Avant)
– Towing protection
as optional extras.
The anti-theft alarm is only activated when
the vehicle is locked via the radio remote con-
trol and by closing the driver's door.Deactivation is performed by
– opening the vehicle via the radio remote
control or
– opening the vehicle via the driver’s door
lock cylinder and switching on the ignition
within 15 seconds. If this time period is not
observed or if the key used is not stored in
the immobiliser, the alarm is triggered.
Data exchange between the immobiliser in
the dash panel insert and the central conven-
ience electronics takes place via the conven-
ience data bus.
Anti-theft alarm with interior monitor
High and low pitched tones
- air horn (sounder) Central control unit for con-
venience system J393Ignition steering
lock D Door lock
Convenience data bus
SSP254_133

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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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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