2009 AUDI S3 check engine light

Driver inf ormati on displ ay
trical components should be checked, repaired or replaced, as
necessary:
• Brake light bulbs
• All wiring connections
• Brake light switch
Contact your authorized Audi dealer for assistance if necessary.
[ i ] Tip s
The brake light switch is only inspected as part of the functional
check after the engine is started .•
A pplies to v ehicles : with automat ic headlights
Light /rain sensor defective .,
The indicator light indicates a defect in the automatic
headlights/automatic wiper system.
If the symbol illuminates, the light sensor has failed . For safety
reasons , the low beams are turned on permanently with the switch
in
AUTO . However, you can continue to turn the lights on and off
using the light switch . In the case of a defect in the rain sensor, the
windshield wiper lever functions are still availab le . H ave the
light/ra in sensor checked as soon as possib le at an authorized Audi
dea ler. •
Ap plies to vehicles: with Adapt ive Light
Adaptive Light defective -)
D Adaptiv e lig ht de fectiv e
When this symbol illuminates, it means that Adaptive Light is
defective. Go to a qua lified workshop to have the headligh ts or the
control unit for the Adaptive Light repaired. •
Applies to vehic les: wit h tire pressure monito ring sy stem
Tire pressure monitoring system J.)
Tire pressure that is too low must be corrected as soon as
possible .
If the I symbol flashes for about one min ute after the igni­
tion is switched on and then remains on, t here is a malfunc ­
tion in the system. Consu lt the nearest authorized Audi
dealer as soon as possible .
Additional information about the tir e p ress ure m onit or in g sy stem
can be found:=> page 264. •

Anti-theft alarm system
The anti-theft alarm triggers an alarm if anyone attempts
to break into the vehicle.
F ig . 3 6 D iod e posi tion
in th e instrum ent p an el
T he anti-theft alarm system triggers an audible alarm and turns on
the emergency flasher if an unau thorized interference with the
vehicle is sensed by the system .
How is the anti -theft alarm sy ste m switched on ?
The anti -theft alarm system is switched on when you lock the
driver's door manually using the fold -out key, or when you use the
remote control. The system is activated approximate ly 30 seconds
after the vehicle is locked. The indicator light~ fig. 36 starts
flashing rapid ly for 30 seconds and then b links slowly .
How i s the anti -theft alarm s yste m switch ed off?
The anti-theft alarm system is switched off when you use the remote
co ntrol to un lock your vehicle. I f you do not open a d oor within 30
seconds after you have unlocked with the remote control, the
vehicle will lock itself again automatically.
I f you lock just the driver's door using your key, the front
passenger's door and the rear lid remain locked.
Con tro ls and eq uip­
ment
Op ening and clo sing
When will th e anti th eft alarm sy ste m b e trigg ere d ?
When the vehic le is locked, the a larm system monitors a nd protects
the following parts of the vehic le:
• engine compartment
• luggage compartment
• doors
• ignition
When the system is ac tivated, the alarm will be trigge red if one of
the doors, the engine hood or the rear lid are opened, or if the igni ­
t ion is turned on or the radio removed.
The anti-theft alarm sys tem will also go off when the battery is
disconnected .
You can also trigger the alarm by pressing the PA NIC button on your
remote-contro l key. This will alert other people in case of emer­
gency. Press the
PANIC button again to turn off the alarm.
How is th e anti-th eft alarm sw itched off when
triggered ?
The alarm system is switched off when you unlock the vehic le using
the remote -cont rol key or when the ignition is switched on . The
alarm wi ll also switch itself off when it comes to the end of its cycle .
Emergency flasher
The emergency flasher will blink briefly when the doors, engine
h o od and rear lid are properly closed.
If the emergency flashers do not blink, check the doors, engine hood
and rear lid to make sure they are properly closed. If you close a
door, the hood or the rear lid with the anti -theft alarm switched on,
the emergency flashers will blink only after you have closed the
door or lid.
[ i ] Tips
For the anti -theft a larm sys tem to func tion properly, make su re all
vehicle doors and windows are closed before leaving the vehicle . •
Vehicle care I I irechnical data

Clear vision
Igniti on ON , light swit ch at ::oo: or fD .
With the lights switched on, the brightness of instrument cluster
!i.e . needles, gauges and displays) and center console il lumination
can be adjusted.
0 Note
The instrument cluster and cent er console illumina tion (gauges and
needles) comes on when you swi tch on the igni tion and the
vehi cle
h eadlights are off .
Be aware of the following difference between
models built to US or Cana dian speci fica tions :
• USA model s: illumination of the in strument clu ster (gauges and
needle s), dash and center con sole around the gear shift lever i s
c o ntrolled by a light sensor lo cated in the instrument panel. The
i n strument panel ill umination will automatically become dimmer
a s th e daylight fades awa y and eventu ally w ill go out completel y
when outside l ight i s very low . Thi s is to remind you , the driver , to
swi tch on the headlight s befo re it get s to o dar k.
• Canada models: in strument panel illumination will stay bright
re gardle ss of the i ntens ity of ambient light . Al wa ys be aware of
change s in out sid e light conditi ons while you are d riving. Re spond
i n time t o fading daylight by turn ing the light swit ch to posit ion
fD
(or "AUTO" if your car is equipped with this feature) to turn on your
headlights . •
Ap plies to vehi cles: with b i-xeno n headli ghts
Bi-Xenon headlights*
After starting the engine, the bi -xenon headlights are automatica lly
adjus ted to the load and angle of the vehic le (for example , during
acce lerat ion and brak ing) . This prevents oncoming traffic fro m
experiencing unnecessary headlight g lare from your bi-xenon head ­
lights .
If the system is not operating properly, a warning symbol in the
Auto -Check Control is displayed ::::;,
page 33. •
Emergency flasher ~
The emergency flasher mak es othe r moto rists aware that
you or your vehicle are in an emergency situation.
1 1 Q
-
II D ll1
[ Ii J
a
l 'l
"' " "'
J
Fi g. 5 4 Cen ter
co nso le : em erge ncy
fl as her swi tc h
Press the sw itch ~==>fig. 54, to sw itch the emergency
flas her on or off.
When the emergency flasher is on, al l four turn signal blink at the
same time. The turn signal indicator lights¢ Q in the inst rument
cluster, as we ll as the light in the emergency flasher switch~ blink
l ikew ise.
The emergency flasher will automatically switch on if you are in an accident where the airbag has deployed .
[ i ] Tips
You should switch on the emergency flasher when :
• you are the last vehicle standing in a traffic jam so that any other
veh ic les coming can see you, or when
• your vehic le has broken down or you are in an emergency situa ­
tion, or when
• your vehicle is being towed by a tow truck or if you are towing
another vehicle behind you. •

• Before you take your vehicle to an automatic car wash , make sure
you have the windshield wiper system switched off !lever in position
Ol, otherwise the windshield wiper system could get damaged in the
car wash if it should suddenly come on.
[ i] Tips
• The rain sensor is part of the interval wiping system. Turning off
the ignition will also deactivate the rain sensor . To reactivate the
sensor, switch off the interval wiping function, then switch it back
on again.
• Worn or dirty windshield wiper blades cause smearing, which
can affect the operation of the light/rain sensor*. Check the condi­
tion of your windshield wiper blades regularly .
• Applies to vehicles with light/rain sensor : When the wipers are
switched on manually and in rain conditions, the automatic head ­
lights* turn on~
page 53, "Sensor activated head- and tail light
control" or off during the day when the wipers are no longer oper ­
ating . The automatic headlights* function is available in this case
only when the light switch is in the "AUTO" position~
page 53,
fig. 48.
• Make sure the washer fluid reservoir in the engine compartment
is topped off before going on a long trip. Look up~
page 241 for
checking and filling the washer container .
• The wipers only operate with the hood complete ly c losed .•
Con tro ls and eq uip­
ment
Clear vision
Rear window wiper
(Q
The wiper lever is also used to operate the rear window
wiper and the automatic wiper/washer function.
Fig. 65 Wiper leve r:
activating the rear
wi ndo w wipe r and
washer
The rear window wiper and the automatic wiper/washer
functions are activated as follows:
Intermittent wiping
Push the wiper lever forward towards the dashboard and
to the
first position ©=> fig. 65. The rear window wiper
will wipe the window approx. every four seconds.
Automatic wiper/washer function
Push the wiper lever forward to the second stop, position
0, and hold it there for as long as you want the rear
wiper/washer to operate.
Re lease the lever again. The wiper will keep running for
approx . four seconds.
Switching intermittent wiper action off
-Pull the lever all the way back to the original position.
Vehicle care I I irechnical data

Clear vision
& WARNING
Wiper blades are crucial for safe driving! Only in good condition
are they able to clear the windows properly to provide unre­
stricted visibility. Worn or frayed wiper blades are a safety hazard!
=> page 67, "Replacing front wiper blades"
(D Note
In freezing or near freezing conditions:
• Always check that the wiper blades are not frozen to the glass
before you turn the wiper on. Loosen a wiper blade which is frozen
in place before operating the wiper to prevent damage to the wiper
blade or the wiper motor.
• Do not use the wiper to clear a frosted window . Using the wipers
as a convenient ice scraper will destroy the wiper blades.
[ i J Tips
For better rearward vision when parking, the rear window wiper is
automatically activated one time when the windshield wipers are
switched on and reverse gear is engaged. •
Applies to vehic les: w ith head light washer system
Headlight washer system
The headlight washer system cleans the headlights.
-Operate the windshield wiper/washer system=> page 63,
fig. 64 © with the headlights turned on by holding the
lever for longer than one second.
The washer jets extend forward out of the front bumper driven by
water pressure to spray the front headlights with water.
You should inspect the headlights regularly (for example when refu­
eling) and clean off any solid dirt or insects from the lenses. To
ensure the system works properly in winter, keep the washer jets
free of snow and remove any ice using a de -icing spray. •
Service position
Replacing the windshield wiper blades is only possible
when you move the wiper arms into the service position. In
order to use the windshield wipers, the hood must be
completely closed. When there is a risk of frost, make sure
that the wiper blades are not frozen to the windshield.
Switch the ignition on.
Act ivate the service position by way of the driver infor­
mation system =>
page 23.
(D Note
Never drive your vehicle when the windshield wiper arms are in the
service position and pulled away from the windshield. When you
drive faster than 4 mph (6 km/h), the wiper arms automatically
return back to the park position and could cause paint damage to
the engine hood!
[ i] Tips
• You can also turn on the service position, for example, if you
want to protect the windshield from icing by using a cover.
• Th e service position moves to
off automatically when you
operate the windshield wiper lever, or speed exceeds 4 mph
(6 km/h). •

•
the ESP check light comes on, see~ page 13. The message ASR off
appears in the display as well.
The ASR should normally be activated all the time . Only in certain
exceptional situations when some slip is desirable does it make
sense to deactivate the ASR. Examples:
• when driving with tire chains
• when driving in deep snow or on loose ground and
• when rocking the vehicle loose after it has become stuck.
When the abnormal situation is over, you should activate the ASR
again.
& WARNING
The increased safety afforded by ASR does not mean that you can
take safety risks. Always adapt your driving style to the road
conditions and traffic situation.
[ i] Tips
To ensure that the ASR works properly, all four wheels must be fitted
with identical tires. Any differences in rolling radius of the tires can
cause the system to reduce engine power when this is not desired.
See also ~
page 255, "New tires and replacing tires and wheels". •
Braking
General information
What affects braking efficiency?
Operating conditions and driving habits
The brakes on today's automobiles are still subject to wear,
depending largely on operating conditions and driving habits~& .
On vehicles that are either driven mostly in stop-and-go city traffic
or are driven hard, the brake pads should be checked by your autho-
Intelligent technology
rized Audi dealer more often than specified in the Warranty & Main­
tenance booklet.
Failure to have your brake pads inspected can
result in reduced brake performance.
On steep slopes, you should use the braking effect of the engine.
This way, you prevent unnecessary wear on the brake system. If you
must use your brakes, do not hold the brakes down continuously.
Pump the brakes at intervals.
Moisture or road salt
If you are driving faster than 50 mph (80 km/h) and the windshield
wipers are on, the brake pads will briefly touch the brake discs in
regular intervals so as to improve reaction time when braking on
wet surfaces. You, the driver, will not notice anything.
Under certain conditions, for example, when driving through water
or very heavy rain, or even after washing your vehicle, the braking
effect can be reduced due to moisture (or in freezing conditions ice)
on the brake pads. A few cautious brake applications should dry off
the brake pads or remove any ice coatings.
The effectiveness of the brakes can be reduced when the vehicle is
driven on a salt-covered road and the brakes are not used . Likewise,
you clean off accumulated salt coating from brake discs and pads
with a few cautious applications of the brake~&.
Corrosion
There may be a tendency for dirt to build up on the brake pads and
corrosion to form on the discs if the car is not driven regularly or
only for short trips with little use of the brakes .
If the brakes are not used frequently, or if corrosion has formed on
the discs, it is advisable to clean off the pads and discs by braking
firmly a few times from a moderately high speed~& .
Faults in the brake system
If you should notice a sudden increase in brake pedal travel, then
one of the two brake circuits may have failed~&. ..,
I t •

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speed. This is most noticeable when turning the steering wheel at
low speeds (for example when parking), -more effort will be
required than usual.
• Be aware of the different than usual steering response and
adjust your steering force accordingly.
• Have the problem checked and set right by an authorized Audi
dealer as soon as possible.
• If a steering malfunction occurs, this is signaled with the or.
@ indicator lights and a warning tone, see.
[ i) Tips
• If the power steering system should fail, or if the engine is not
running (for example, while being towed), you will still be able to
steer the vehicle. However, more effort will be required to do so.
• If the power steering system is not functioning properly, contact
your authorized Audi dealer immediately.
Applies to vehicles: with All Wheel Drive
Driving with your quattro®
With All Wheel Drive, all four wheels are driven.
General information
With All Wheel Drive, power is distributed to all four wheels. This
happens automatically depending on your driving style and the
road conditions at the time. See also::::,
page 191, "Electronic differ­
ential lock (EDU".
Winter tires
When driving in the winter, your vehicle with All Wheel Drive has an
advantage, even with regular tires. In winter road conditions it may
be advisable to mount winter tires (or all -season tires) for improved
driveability and braking: these tires must be mounted on
all four
wheels.
See also ::::, page 260, "Winter ti res".
Snow chains
Where snow chains are mandatory on certain roads, this normally
also applies to vehicles with all-wheel drive:::::,
page 261, "Snow
chains".
Replacing wheels/tires
Vehicles with All Wheel Drive must always have tires of the same
size. Also avoid tires with different tread depths. For details see
page ::::,
page 255, "New tires and replacing tires and wheels".
Off-Road driving?
Your Audi does not have enough ground clearance to be used as an
off-road vehicle. It is therefore best to avoid rough tracks and
uneven terrain as much as possible. Also refer to::::,
page 199.
& WARNING
Always adjust your driving to road and traffic conditions. Do not
let the extra safety afforded by the all-wheel drive tempt you into
taking extra risks.
• Although the quattro ®all-wheel drive is very effective, always
remember that braking capacity is limited by tire traction. You
should therefore not drive at excessive speeds on icy or slippery
road surfaces.
• On wet road surfaces, be careful not to drive too fast because
the front wheels could begin to slide on top of the water (hydro­ planing). If this should occur, you will have no warning from a
sudden increase in engine speed as with a front-wheel drive
vehicle. Always drive at speeds which are adjusted to the road
conditions -risk of crash!
n

___ T_ r _a_ il_e _r_ t_ o_ vv_ in__... g,_ __________________________________________________ _
Trailer towing
Driving with a trailer
General information
Your Audi was designed primarily for passenger transpor­
tation.
If you plan to tow a trailer, please remember that the additional load
wi ll affect durability, economy and performance.
Trai ler towing not on ly p laces more stress on the vehicle, it a lso ca lls
for more concentration from the driver.
For this reasons, always fo llow the operating and driving instruc ­
tions provided and use common sense. •
Technical requirements
Traile r hit ch
Use a weight -carrying hitch conforming to the gross trailer weight.
The hitch must be suitab le for your vehicle and tra iler and must be
mounted secure ly on the vehicle's chassis at a
technically sound
location . Use only a trailer hitch w ith removable ball mount. A lways
check with the trai ler hitch manufacturer to make sure that you are
using the correct hitch .
Do not use a bumper hit ch .
The hitch must be installed in such a way that it does not interfere
w ith the impact-absorbing bumper system . No modifications
should be made to the vehicle exhaust and brake systems. From
time to time, check that all hitch mount ing bolts remain securely
fastened.
When you are not towing a trailer, remove the trailer hitch ball
mount. This prevents the hitch from causing damage should your
vehic le be struck from behind
=:> & .
Tire pre ssure
When towing a trailer, inflate the tires of your vehic le to the cold tire
pressure listed under "Full load"on the sticker on the right door­
jamb. Inflate trai ler tires to trai ler and tire manufacturers' specifica ­
tions.
Lights
The head ligh t settings should be checked wit h the trai ler attached
before driving off. Have the head lights adjusted as necessary so
t hat you can see the road ahead but not blind oncoming traffic.
Check to make sure both vehicle and trailer lights are working prop ­
erly.
Engin e cool ing sy stem
Towing a t rai ler makes the engine wo rk ha rder . It is important that
the cooling system's performance stands up to the additiona l
strain. Make sure that the coo ling syste m has enoug h fluid.
Traile r br akes
If your traile r is equipped wi th a braking system, check to be sure
that it conforms to al l regu lations.
T he trailer hydraulic brake system must not be directly connected to
the vehic le's hydrau lic brake sys tem.
Safety chai ns
Be sure trailer safety chains are properly connected from the trailer
to the h itch on the vehicle. Leave enough slack in the chains to
permit turning corners. When you install safety chains, make sure
they will not drag on the road when you are driving.
The chains should cross under the trailer tongue to prevent it from
dropping in case of separation from the hitch. _.