AUDI A4 CABRIOLET 2009 Service Manual

• For Declarat ion of Compliance to United States FCC and Industry
Canada regulations ~ page
320. •
App lies to ve hicles: w ith tir e p res sure mon it o ring syst em
Significant loss of air pressure
The yellow symbol appears in the event of a significant
Joss of air pressure.
i :c co CD
Fig . 28 Disp lay : ye llow
sy mbo l w ith message
If the warn ing light in the instr ument cl uster comes on
and then the ' symbol appears in the display => fig. 28,
press ure in a t least one t ire is too low .
- Stop driv ing as soon as possible, witho ut endange ring
yo urse lf and o ther motor ists .
- Inspect the tire or t ires .
Change the tire
if necessary =:, page 293.
The J warning light in the instrum ent cluster comes on when the
tire is significantly underinflated .
In addition , the tire symbo l l appears in the display together with
the message Please check tire pre ssur e~ fig . 28.
After a few seconds, the message disappears again . If you would
l i ke to show the message aga in, press the [ CH ECK] button .
Contro ls and eq uip­
ment
Dri ver informa tio n di spl ay
[ i ] Tip s
• In the case of an intentional loss of air pressure, for examp le,
when re -adjusting tire pressure, th is has to be stored again after ­
wards ~ page
43.
• Tire pressure must only be adjusted wh en the temperature of the
tires is about the same as ambient air temperature.
• The yellow symbol disappears, when the tire pressure is
corrected and the new pressure is stored in the system~ page
43.
• After changing a wheel you have to adjust the tire pressures on
a ll whee ls . In addi tion , you must then initialize the new tire pres­
sures in the tire pressure mon itoring system ~ page
45. •
Applie s to veh ic le s: w ith tir e p re ss ure mon ito rin g syste m
Adjusting and storing the tire pressure
(step 1)
Only when the specified pressure is properly entered into
the system, is the tire pressure monit oring system prop­
erly calibrated for accurate indications.
~ehicle care
Fig . 2 9 Wip er arm :
co ntr ols for th e tir e
pr ess ure
Technical data

Driver information display
Fig. 30 Center display :
starting menu
In order fo r the t ire pressure monitoring system to operate
accurately , you have to
re-save the specified pressures
whenever you adjust t ire pressure, for example , when t he
l oad conditio n of you r vehicle changes . Proceed as follows :
Correct the tire pressure
Check the pressure in the t ires (i ncluding the spare tire).
Adjust the air pressure as needed in accordance w ith the
i nformation on the tire pressure label.
Reset the system
- Push the (RESET ] button=> page 43, fig. 29 until Display
Type =>
fig. 30 appears.
- Push in the upper (lower) protrusion on the function
selector switch @to select the
Set option. •
Applies to veh ic les : w it h tir e pressu re mon ito ring sys tem
Storing the adjusted tire pressure (step 2)
Fig. 31 Center display :
tire pressure selected
Fig. 32 Center display:
storing the tire pres ­
sure
- Push the (RESET] @ button=> page 43, fig. 29.
Push in the uppe r (lower) protrusion on the functio n
selector switch @ to select the
Tire pressure option
=> fig. 31.
- Push the
( RESE T] button .
- Push in the upper (lower) protrusion on the function selector switch @ to select the
Store pressures option
=> fig. 32. _.,

Following each intentional change in specified pressures, tire pres­
sures must be resaved .
After the pressures are saved, the tire pressure monitoring system measures the current tire pressures and saves them as the new
specified pressures.
[ i ] Tips
• The tire pressure is shown on the tire pressure label. On USA
vehic les, the tire pressure label is located on the driver 's side 8-
pillar. On Canada vehicles, the tire pressure label is located either on
the driver's side 8 -pi llar or insid e the fuel filler flap . The tire pressure
label lists the recommended cold tire inflation pressures for the
vehicle at its maximum capacity weight and the tires that were on
your vehicle at the time it was manufactured . For recommended tire
pressures for normal load conditions , please see chapter
=> page 271.
• The tire pressure monitoring system he lps the driver to keep an
eye on tire pressures . But the driver st ill has t he responsibi lity for
maintaining the correct tire pressure .•
Contro ls and eq uip­
ment
Dri ver informa tio n di spl ay
Ap plies to veh icles : w it h tir e pr essure mo nito ring syste m
Changing a wheel
When you change a wheel, the new tire must be initial­
ized .
Fig . 33 Ce nter disp lay :
t ir e pr essur e se lecte d
Fi g. 3 4 Center disp lay :
W heel c hang e se lecte d
Activate and proceed through the menu as specified in
step 1 above ~
page 43,
select Wheel change in the Tire pres sure menu.
Programming is necessary:
• after rotating the wheels on the vehicle,
• if wheels with new wheel sensors are used .
~ehicle care Technical data

Driver inf orma tion d ispl ay
Your tire change is incomplete if you do not access the Driver Infor­
mation System menu, and select and confirm
Wh eel ch ange. You
must do this each time to change a tire . The procedure can take up
to 20 minutes driving time. During this time, the sensors are read ­
justing to the new wheel/tire combination, and the new pressures are stored.
During the learning phase, the tire pressure monitoring system is
not available. •
Applies to vehic les: with tire pressure monitor ing system
Malfunctions
A malfunction can have various causes.
Fig . 35 Dis pl ay:
Syst em m alfu nct ion
If the 'warning light in the instrument cluster flashes for approxi ­
mately one minute and then remains continuously illuminated and
additional ly the --, -=> fig. 35 symbol appears in the display, the
tire pressure monitoring system is not available. This can have
various causes.
• If the message appears a t the end of the learning phase, the
system cannot recognize the wheels installed on the vehicle . This
can be because one or more wheels without a wheel sensor were
installed.
• A wheel sensor or other component may have failed. •
The system has detected more than 4 wheels in the vehicle, for
example while driving beneath another car with tire pressure moni ­
toring system.
• A tire was changed but the=>
page 45, "Changing a wheel"
procedure was not activated =>
page 45.
• Audi replacement parts were not used.
• If snow chains are being used, system function can be compro ­
m ised due to the shielding properties of the chains.
• The tire pressure monitoring system may not be ava ilable
because of a radio malfunction.
• Transmi tters with the same frequency, such as radio head ­
phones in the vehicle or radio equipment, can cause a temporary
disruption of the system through excessive electromagnetic fields.
• Try to find the cause of the interference, and then perform the
=>
page 45 , "Changing a wheel" procedure one more time . If this not
e liminate the prob lem, contact your authorized Audi dealer for
assistance .
• Do not use commercial ly availab le tire sealants . Otherwise, the
e lec trical components of the tire pressure monitoring system will
no longer work properly and the sensor for the tire pressure moni­
toring system wi ll have to be rep laced by a qua lified workshop .•

Opening and closing
Keys
Key set
@ Master key w ith rem ote con tro l
Fig . 3 6 Key set
You can centrally lock and unlock your vehicle and start the engine
with the master key with remo te contro l.
@Val et k ey
The va le t key fits only the driver's door and the ignition lock. If you
have to leave the key with somebody else, you are well-advised to
turn over the valet key only.
Be aware that the rear lid can be opened from inside t he veh ic le with
the remote rear lid release located in the driver's door. Before you
turn ove r the valet key you should therefo re lock the rear lid
mechanica lly with the master key.
Turn t he master key
clo ckwi se to the hor izont al posit ion and pull it
out. This has two effects:
• the
remote rear lid release i s dea ctivated ,
• the lid will rem ain lo cked when the power locking system is actu­
ated .
Controls and equip ­
ment
Op ening and clo sing
In this state the rear lid can be unlocked only with the remote
control unlock button
c::::5 on the master key.
© Em erg en cy key
The emergency key is only for temporary use if the vehicle key
should be lost or misplaced
~ & .
Key r epla cemen t
If you lose a key, contact your authorized Audi dea ler immediately
to have the /ostkey disab led. Be sure to bring all your keys with you.
& WARNING
• Do not leave your vehicle unattended wi th the key in the igni ­
tion lock. Entr y by un auth orized persons could e ndanger you or
re sult in theft or damage the vehi cle . Always lock all door s and
t a ke th e key.
• Do not le ave children unattend ed
in the vehicle , es pecially with
a cce ss to vehic le key s. Unguarded a ccess to the ke ys prov ide s
children th e opportunity to start th e eng ine and /or a ctivate vehicle
s y stem s suc h as the po wer w indo ws. Un sup erv is ed oper atio n of
an y vehi cle sy ste m by children can re sult in seriou s injury .
[ i ] Tips
• If you open the driver's door with the key left in the ignition lock,
a chime will sound . This is your reminder to remove the key and lock
the door .
• For security reasons, replacement keys are only available from
Audi dealers. •

Opening and clos ing
Master key with remote control
The rem ote control allows you to lock or unlock the
vehicle electronically.
F ig . 37 Fo ld- up ma ster
key with re mote
co ntr ol
- To fold the key out and back i n place, press the release
button ::::, fig. 37.
The transmitter and battery are located in the head of the remote
control. The receiver is located inside the vehicle. The maximum
effective range depends on several things. Remember, if the ba ttery
is weak, the effective range decreases.
I f you need to replace the remote cont ro l, or if you need to have it
repaired, you must see your authorized Audi dealer. Only then can
you use the key again .
[ i ] Tips
• If the ignition is switched on, the remote control system is deac ­
tivated.
• The remote control system can be affected by other systems
operating in the same frequency range close to the vehicle, such as
mobile telephones, television broadcasting stations, etc.
• For Declaration of Compliance to United States FCC and Industry
Canada regulations =>
page 320. •
Check light in remote master key
The check light in the rem ote master key indic ates the
state of charge of the battery.
S ta te o f m aste r k ey ba tt e ry
F ig . 3 8 Check lig ht in
th e m as ter key
When a button is pressed, the check light flashes=> fig . 38 (arrow).
If the check light does not come on or flash, the battery is dead and
has to be replaced .
Battery replacement =>
page 49. •