lock AUDI A4 2001 B5 / 1.G Technical Features Design And Function

Downloaded from www.Manualslib.com manuals search engine
64
Functional mechanism of inclination sender
Towing protection is achieved by means of
the inclination sender installed in the central
convenience electronics.
The functional mechanism of the inclination
sender is based on the determination of
resistance changes relating to the volumetric
fluctuation of a viscous electrically conduc-
tive fluid.
Electrical system
SSP254_110
The resistance is stored at the moment of
activation of the anti-theft alarm.
Changes in the position of the inclination
sensor caused by one-sided lifting of the
vehicle alter the resistance. The alarm is trig-
gered.
The angle of inclination can be displayed in
the measured value blocks.
Sub-com-
partment
Ceramic
housing
Indicator
fluid
Electrodes
Operational
amplifier

Variously arranged electrodes project into
this fluid.
Alternating fields are applied to the elec-
trodes of the sender, which is divided into
sub-compartments.
When a change in position occurs, the distri-
bution of the fluid in the chambers also
changes.
As the level of the liquid in the sub-compart-
ments changes, the resistance determined for
the sub-compartments via the electrodes also
changes.
Electrode
connections
SSP254_111

Downloaded from www.Manualslib.com manuals search engine
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.
AIRBAG
OFFON
Audicd chargerCOMPAKTAKTDIGITAL AUDIOAL AUDIO
LOAD

SSP254_106

Downloaded from www.Manualslib.com manuals search engine
72
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

Downloaded from www.Manualslib.com manuals search engine
73
Television (TV) tuner
The image and sound quality of each individ-
ual tuner is monitored in the TV tuner. The
tuner with the best reception is switched
through to the operating unit.
Thanks to the high speed, switching can be
performed within a single scanning line.
The control signals of the Navigation Plus -
operating unit are transmitted via the data
bus system of the navigation system.
Transfer of the image and sound data takes
place via the conventional wiring.
The TV tuner is not connected to the data bus
information system.
Self-diagnosis
Address word 57
The video standard for the relevant country
can be set via the coding function.
The TV aerials can be activated for reception
consecutively in the final control diagnosis,
enabling the detection of a faulty aerial.
The condition of the connections to the
aerials, navigation system and external video
inputs can be displayed via the measured
value blocks.
SSP254_137

Downloaded from www.Manualslib.com manuals search engine
76
Heater/AC
Operating and display unit E87.
The redesigned system is based on the
performance data for top of the medium
range vehicles, taking account of low system
weight and energy consumption as well as, to
an increasing extent, recycling capability.
The operating and display unit E87 is
connected to the convenience CAN bus.
Diagnosis takes place via the K-wire.
Design and function
The air conditioner represents a further devel-
opment of the two-zone air conditioning
concept previously used in the A6.
Innovations include:
– Individual temperature control for both
driver and front passenger
– Option of synchronising the temperature
zones for driver and front passenger by
pressing the ”Auto” button for approx.
three seconds.
Example:
If the same temperature is desired for the
passenger’s side as for the driver’s side,
the ”Auto” button should be pressed for at
least three seconds.
The same applies the other way round, for
making the driver’s side temperature the
same as that of the passenger’s side.
– The fault diagnosis and measured value
blocks for the seat heating system are read
out via address word 08 for the air condi-
tioner.
– The system is encoded automatically via
the dash panel insert.– Integrated rotary control knob with poten-
tiometer for seat heating.
(this means the potentiometers cannot be
replaced individually)
– Intake blower V42 for passenger compart-
ment temperature sensor G56 is integrated
and cannot be replaced individually.
A distinction is made between eight different
versions, identified by means of the part
number index:
– with or without seat heating
– with or without navigation system,
– at a later date, with or without air quality
sensor.

SSP254_032

Downloaded from www.Manualslib.com manuals search engine
81
Fresh air blower
Control technology has been integrated in the
new fresh air blower.
It includes the following features:
– Integrated control unit with diagnostic
capability via the operating and display
unit E87 (fault memory and measured
value block diagnosis-capable control
unit),
– optimised bearings for smoother running,
– separate solar input.
The required blower speed is calculated in the
operating and display unit E87, and requested
by the control unit for fresh air blower J126
via a PWM signal.In the case of malfunctions, such as e.g. a stiff
or blocked blower, this is signalled to the
operating and display unit E87 by duty cycle
changes based on the altered frequency. The
relevant fault is set.
The blower bearings have been re-engineered
in order to optimise the effectiveness of the
system.
This particularly benefits solar operation.
The energy supplied by the solar roof is
utilised to drive the fresh air blower by means
of special electronics via the separate solar
input in the blower.
SSP254_037