display AUDI A8 2003 D3 / 2.G Technical Features Manual

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Multifunction steering wheel
A new multifunction steering wheel has been
introduced as standard. This is equipped with
special paddles (as used in formula 1 and for
the Le Mans R8) for manual shifting of the
6-speed Tiptronic
®. The voice control option
for radio, CD changer, telephone, navigation
system and MMI address book can also be
operated by way of the multifunction steering
wheel.
Dash panel insert display
Selection menu for:
– Radio station
– CD track
– Telephone address book
– Navigation system information
display
SSP282_086
Press MODE button:
For telephone, navigation system and
radio/CD menu selection
Turn left function control:
To select menu item
Press left function control:
For selection within chosen menu item
To accept a telephone callPress PTT (push to talk) button:
To activate/deactivate voice control
Turn right function control:
To regulate volume
Press right function control:
To repeat last navigation system message
Volume level/navigation
message repetition
control
Voice control
start/termination
button MODE button Menu selection
controlPaddle –Paddle +

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Electrical System
Both in the modern business world and in the
private domain, mobile information and
entertainment are becoming ever more
important. In other words, vehicle occupants are becoming
increasingly interested in enjoying the benefits of
modern media.
SSP282_090
Infotainment
DVD - Video
TV reception
Minidisc/CD audio Internet
EmailTelephone
Telematics DAB - Digital radio
CD/DVD navigation Central display
and control

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An optional feature for the Audi A8 ´03 is
4-zone climate control, enabling both driver
and all passengers to make individual
settings independently of the climate control
level selected for the other occupants.
Design and operation
The air conditioning system represents a
more advanced version of the concept
employed in the Audi A8 predecessor model
with 2-zone climate control and features fully
automatic regulation.
Heating/Air Conditioner
The following components are new features
as compared to the systems previously fitted
in the Audi A8:
– Humidity sender G355
– Evaporator outflow temperature sender
G263
– Two versions: 2-zone front climate control
with 12 control motors and 4-zone front
and rear climate control with 15 control
motors
– Rear climate control with electric rear
additional heater as additional equipment
("4-zone system") – rear left and rear right
footwell heater element Z42 and Z43
– Second control and display unit with
4-zone climate control, Climatronic control
unit J255, rear Climatronic control and
display unit E265– Climate control menu in MMI (Multimedia
Interface) for display of climate control set
values and basic settings
– Front and rear seat heating and seat
ventilation
– Heated windscreen Z2
– Energy management control unit J644
The interaction of these components in
coordination with the entire air conditioning
system forms a control loop and permits
comfortable front and rear climate control to
suit all requirements.
SSP282_098

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A distinction is made between two air
conditioner unit versions
– 2-zone front and rear climate
control
– 4-zone front and rear climate
control
and three types of control and
display unit
– Air conditioner control panel with
no seat heating/ventilation
– Air conditioner control panel with
seat heating
– Air conditioner control panel with
seat heating and seat ventilation
(identified by part number index).
SSP282_099
Self-diagnosis
Fault diagnosis and measured value blocks
for air conditioner and seat heating system
can be read out by way of address words 08
"Air conditioner/heater electronics" and 28
"Rear climate control". The functions of and
exact procedure for self-diagnosis and
assisted fault-finding with VAS 5051 can be
found in the Heating/Air Conditioner
Workshop Manual for the relevant vehicle
model.
Operating principle
When the ignition is switched on, the
Climatronic control unit J255 starts up with
the same temperature, air distribution and
fresh-air blower speed settings etc. as were
applicable the last time the ignition was
switched off by way of the appropriate key or
using fingerprint recognition.
If fingerprint recognition has been
implemented, this has priority over key
recognition (refer also to SSP 287 – Audi A8 ´03
Electrical Components).
Personalised settings
The following settings can be made for each
climate control zone (front left, right and,
optionally, with 4-zone climate control rear left
and right):
– Left/right temperature
– Air flow
– Left/right air distribution
– Left/right seat heating
– Left/right seat ventilation
– Operating modes (AUTO for driver and front
passenger, temperature-adjustable centre
vents, automatically controlled
recirculated-air mode, ECON)
The heated windscreen can be activated by
way of the air conditioner defrost button or
the air conditioner control unit automatically
switches on the electric heated windscreen if
the appropriate conditions are satisfied
(windscreen defrost or automatic mode on
cold starting).
The Climatronic J255 and heated windscreen
J505 control units communicate by way of the
LIN bus. The Climatronic control unit transmits
the specified windscreen heating power to the
heated windscreen control unit on the LIN bus.
Heating/Air Conditioner
Key recognition takes place in the case of
remote control (radio or key transponder),
with the driver identification control unit
providing the Climatronic control unit J255
with the appropriate information by way of
the CAN bus.
The electrically heated windscreen is only
supplied with the amount of power which can
currently be drawn from the electrical system
without draining the battery. This is
monitored by the energy management
control unit J644.
As is the case with the Audi A4, the
windscreen is heated by applying voltage to a
metallic foil fitted in the glass (refer to
SSP 213).
As in the Audi A4, the air conditioner
compressor is regulated as a function of load
and controlled externally by way of the
compressor regulating valve (refer to
SSP 240). The Climatronic control unit J255 is
connected to the convenience CAN, via
which diagnosis is also performed.
A manual air conditioning system is not
available.

Downloaded from www.Manualslib.com manuals search engine Climatronic control unit J255
SSP282_100
Rear Climatronic control and display unit E265
Air conditioner basic setting
control
Heated rear window
control Front control panel
activation/
deactivation
Seat ventilation
control
Air distribution control
– Up
– Chest vent/centre
– Down Left rotary control/pushbutton
Rotary control +/- for
– Temperature
– Blower speed
– Air distribution up/down
– Seat heating
– Seat ventilation
– Menu control via MMI
Pushbutton
– Synchronisation of driver's
side, passenger's side and
rear settingsDriver's side
control panelPassenger's side
control panel Seat heating controlReset to basic setting/
automatic mode
Temperature sensor
with blowerAir conditioner defrost
and electrically heated
windscreen
Manual recirculated-air
mode control Blower control
Rear left
control panelCentre console/footwell
air distribution controlReset to basic setting/
automatic mode
Rear right
control panel
Left rotary control/pushbutton
Rotary control +/- for
– Temperature
– Chest vent and footwell air
distribution
– Seat heating
– Seat ventilation
Pushbutton
– Synchronisation of driver's
side and passenger's side
settings
Rear left seat heating
controlRear control panel
activation/
deactivation
Rear right seat
ventilation controlRear right seat heating
control
Rear left seat ventilation
control

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3
36
Auto
21,5° C
63
3
The current air conditioner settings are stored
automatically and assigned to the
appropriate remote control key. On vehicles
with Audi one-touch memory (optional), the
current setting is also assigned to the
corresponding fingerprint. Air conditioning system control via MMI
All air conditioning system set values and
basic settings (setup) can be displayed by
way of the MMI. This applies both to the
Climatronic control unit button functions and
to setup.
If the air conditioning system is activated
with the MMI switched on, the air conditioner
function settings can be called up and altered
by way of the multimedia control panel. The
functions indicated in the corners of the
displayed mask are activated using the
softkeys.
Basic setting (setup)
The basic air conditioner settings can only be
altered when the MMI is active. This involves
pressing the SETUP button on the Climatronic
control unit.
The following functions can be selected:
– ECON ON/OFF
– Automatic air recirculation active/inactive
– Synchronisation active/inactive
– Centre vent (temperature-adjustable)
settings between - 3 and + 3
– Auxiliary heater active/inactive
– Auxiliary ventilation active/inactive
– Auxiliary heater/ventilation operating time
15 min./30 min./45 min./60 min.
– Auxiliary heater/ventilation timer status for
timers T1, T2, T3 ON/OFF
– Solar mode active/inactive (solar cells
C20)
– Rear control ON/OFF
The desired settings can be called up and
altered with the driver's/front passenger's
control knob on the Climatronic control unit.
SSP282_112
SSP282_113
low high
Econ
Distribution Seat ventilation
Blower Seat heatingAC - driver
Blower Seat heatingAC setup
Distribution Seat ventilation
Off
Autom. air recirculationOff
Synchron.Off
Centre vent

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Heating/Air Conditioner
SSP282_103 Fresh-air intake duct
temperature sensor G89
Flap control
motor potentiometers
G92, G113, G135, G136,
G137, G138, G139, G140,
G143, G317, G318, G349,
G350, G351, G352
Air quality sensor G238
Left/right vent temperature
sender G150/G151
Centre vent temperature
sender G191
Evaporator outflow temperature
sender G263
High-pressure sender G65
Sunlight penetration
photosensor G107
Solar cells in sunroof C20
System layoutControl unit with display
in dash panel insert J285
MOST busFront information display and
operating unit control unit J523
Rear right footwell heater
element Z43 Rear left footwell heater
element Z42 Fresh-air blower control unit
J126 with fresh-air blower V2Diagnosis CAN
Data bus diagnostic
interface J533
Sunroof electronics
control unit J528 Humidity
sender G355
Humidity sender
heater N340
Climatronic
control unit J255
Convenience CAN
Additional heater
control unit J364 Rear Climatronic control
and display unit E265Energy management
control unit J644Drive system CANEngine control unit J623Front information and display and
operating unit control unit J685
Radiator fan
control unit J293
Radiator fan V7
Air conditioning system compressor regulating valve N280
Flap control motors
V68, V71, V102, V107, V108, V109,
V110, V111, V113, V199, V200, V220,
V218, V219, V221
Coolant circulation pump V50
Left/right heat regulation valve N175/N176
Heated windscreen control unit J505
Heated windscreen Z2
Driver seat/front passenger seat ventilation control unit
J672/J673
Front left/front right heated seat Z45/Z46
Temperature sender for front left/front right seat
G344/G345

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Heating/Air Conditioner
SSP282_103 Fresh-air intake duct
temperature sensor G89
Flap control
motor potentiometers
G92, G113, G135, G136,
G137, G138, G139, G140,
G143, G317, G318, G349,
G350, G351, G352
Air quality sensor G238
Left/right vent temperature
sender G150/G151
Centre vent temperature
sender G191
Evaporator outflow temperature
sender G263
High-pressure sender G65
Sunlight penetration
photosensor G107
Solar cells in sunroof C20
System layoutControl unit with display
in dash panel insert J285
MOST busFront information display and
operating unit control unit J523
Rear right footwell heater
element Z43 Rear left footwell heater
element Z42 Fresh-air blower control unit
J126 with fresh-air blower V2Diagnosis CAN
Data bus diagnostic
interface J533
Sunroof electronics
control unit J528 Humidity
sender G355
Humidity sender
heater N340
Climatronic
control unit J255
Convenience CAN
Additional heater
control unit J364 Rear Climatronic control
and display unit E265Energy management
control unit J644Drive system CANEngine control unit J623Front information and display and
operating unit control unit J685
Radiator fan
control unit J293
Radiator fan V7
Air conditioning system compressor regulating valve N280
Flap control motors
V68, V71, V102, V107, V108, V109,
V110, V111, V113, V199, V200, V220,
V218, V219, V221
Coolant circulation pump V50
Left/right heat regulation valve N175/N176
Heated windscreen control unit J505
Heated windscreen Z2
Driver seat/front passenger seat ventilation control unit
J672/J673
Front left/front right heated seat Z45/Z46
Temperature sender for front left/front right seat
G344/G345

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The buttons for the seat heating and
ventilation options are integrated into the
front and rear control and display units
(refer to Page 74). Climate-controlled seats with heating and
ventilation function
The Audi A8 ´03 can be fitted with front and
rear climate-controlled seats as optional
equipment. These seats offer a combination
of seat heating and seat ventilation and can
be regulated individually for each occupant.
Heating/Air Conditioner
The corresponding feedback LED lights after
pushbutton activation of seat heating/seat
ventilation. The selected seat heating/seat
ventilation stage can be called up in the
display segment of the Climatronic control
unit J255 and in the MMI (Multimedia
Interface) climate control menu. Once seat
heating/seat ventilation has been activated, it
remains active even after switching off the air
conditioner by means of the ON/OFF button.The use of seat ventilation leads to lower
occupant skin temperatures. Automatic
additional seat heating operation controlled
as a function of temperature cancels the
cooling effect and the air flow is warmed.
The ventilation function promotes pleasant
conditions in the occupant's back and seat
area and eliminates sweating more quickly.
Under normal circumstances, the seat
ventilation function is deactivated
automatically after approx. 30 minutes.
SSP282_107 Seat heating
button
Seat ventilation
button

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Key
E265 Rear Climatronic control and display
unit
G94 Rear left seat temperature sensor
G95 Rear right seat temperature sensor
G177 Driver side rear seat occupied sensor
G178 Front passenger side rear seat
occupied sensor
G349 Positioning motor potentiometer
for rear left vent
G350 Positioning motor potentiometer
for rear right vent
G426 Driver side rear seat
temperature sensor
G427 Passenger side rear seat
temperature sensor
J533 Data bus diagnostic interface
J674 Driver side rear seat ventilation
control unit
J675 Front passenger side rear seat
ventilation control unit
T16 16-pin connector
(diagnostic connection)
V218 Rear left vent control
motor
V219 Rear right vent control
motor
V270 Rear right seat fan
V271 Rear left seat fan
V272 Rear right seat backrest fan
V273 Rear left seat backrest fan
Z10 Left heated rear seat
Z11 Left heated rear seat backrest
Z12 Right heated rear seat
Z13 Right heated rear seat backrest Colour code
= Input signal
= Output signal
= Positive supply
= Earth
= Convenience CAN High
= Convenience CAN Low
= LIN bus
Z13V272MM
V270
SSP282_115