2009 AUDI TT COUPE sensor

Ignition ON , light swit ch at @ .
With the ignition switched ON, the g low of instrument needles can
be adjusted to appear brighter or dimmer.
Ignition ON , ligh t switch at :oo ; or io.
With the lights switched on , the brightness of instrument cluster
(i .e. needles, gauges and displays) and center conso le i llu m in ation
can be adjusted .
0 Note
The instrument c luster and center console illumination (gauges and
needles) comes on when you switch on the igni tion and the
vehicle
headlights are off .
Be aware of the followin g difference be tween
models built to US o r Canadian specifications :
• USA models : illumination of the in strument cluster (gauges and
needles), dash and center console around the gearshift lever is
controlled by a light sensor located in the instrument panel. The
instrument panel illum ination will automatically become dimmer
as the daylight fades away and eventually will go out completely
when outside light is very low . This is to remind you , the d river , to
s witch on the headlight s before it gets too dark.
• Canada models : instrument panel illum ination will stay br ight
regardle ss of the inten sity of ambient light . Always be aware of
c hanges in outside light conditions while you are driving . Respond
in time to fading dayli ght by turning the light switch to position
iD
(or "AUTO" if your car is equipped with this feature) to turn on your
headlights. •
Bi-Xenon headlights*
Afte r starting the engi ne, the b i- xeno n headlights are au tomatical ly
adjusted to the load and angle of the vehic le (for example, during
acce lera tion and braking). This prevents oncoming traffi c from
experiencing unnecessary headlight g lare from your bi -xenon head ­
lig hts .
Con tro ls and eq uip­
ment
Clear vision
I f the system is not operating properly, a warning symbo l in the
Au to-Check C ontr ol is displayed
=> page 36 . •
Emergency flasher tfft,,.
T he e mergency flasher m akes other motor ists aware that
y o u or yo ur vehicle are i n an e merge ncy si tuation.
Fig . 46 Center
co nsole : emergency
fla sher sw itch
Press the sw itch ~=:,fig. 46, to s witch t he emergency
flasher on or off.
When the emergency flasher is on, all four turn signal blink at the
same time . The tu rn signal indi cato r lights
¢i Q in the instrument
c luster, as well as the light in the emergency flasher switch
J:&. b link
likewise.
The eme rgency flashe r will automat ically switch on i f 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
vehicles coming can see you, or when
• your vehicle has broken down or you are in an emergency s itua -
tion, o r when _,,,
Vehicle care I I irechnical data

Clear vision
ically . It turns off when the lid is closed and the visor is folded up
again .
Between the visors for the driver and the passenger there is a
folding visor which can be used to cover the space above the rear
view mirror .•
Wiper and washer system
Windshield wiper -$
The windshield wiper lever controls bo th the windshield
wipers and the washer system.
Fi g. 50 Wiper l ever:
wind shie ld w iper l eve r
po sit io ns
T he windshield wipe r lever => fig. 50 has the fo llowing posi ­
t io ns:
Intermittent wiping <5;)1 (activating rain sensor)*
Move t he leve r up to pos ition G) .
- Move the in terva l set switch @, to change the in te rvals .
Low wiper speed
-Move the leve r up to pos ition @ .
High wiper sp eed
- Move the lever u p to position ®·
One-touch wiping
- Mov e the lev er t o posi tion 0 , w hen you wa nt to w ipe t he
windshield
briefly.
Automatic wiper /washer
- Pull the lever to position © (toward the steering wheel)
and hold.
- Release t he lever . The was her stops and the wipers keep
going for about four seconds.
Turning off the wipers
- Mov e the lever bac k t o posi tio n ®·
The windshield wipers and washer only work when the ign ition is
turned on. If you switch off the ignition with the windshield wiper
l ever still in the interval wipe p osition and the n come back a while
later and drive off , the rain sensor will reactivate itse lf after the
vehic le speed has exceeded 4 mph (6 km/h) .
The rai n se nsor* is only activa ted wit h the wiper lever set to posi­
tion
G) . When it starts to rain , the rain sensor wil l automatically acti ­
vate the in termittent wipi ng mode .
To reduce the sens itiv ity of the sensor, move switch© down . To
increa se the sensitivity, move the switch up . The h igher you adjust
the sensitivity, the faster the sensor will react when it senses mois ­
ture on the w indshie ld. The pauses between wiper turns depend not
only on the sens itivity setting, but on the vehicle speed as well.
During brief stops, e .g . at a red light, wiper motion will automati ­
cally be reduced to the next lower speed. Wipers a lready turning at
low speed . change to intermittent wiping .
When the ignition is turned on, the washe r jets are heated. ...

& WARNING
• Wiper blades are crucial for safe driving! Only when they are in
good condition are they able to clear the windows properly to
provide uncompromising visibility. Worn or damaged wiper blades
are a safety hazard~
page 63, "Replacing front wiper blades"!
• The light/rain sensor* is only designed to assist and support
the driver. It remains entirely the driver's responsibility to monitor outside weather conditions and to manually activate the wipers as
soon as rain or drizzle reduces visibility through the windshield.
• The windshield must not be treated with water-repellent mate­
rials. They can increase glare under poor visibility conditions such
as wetness, darkness, or when the sun is low on the horizon. In
addition, they can cause the windshield wipers to chatter.
0 Note
In freezing or near freezing conditions:
• Always check that the wiper blades are not frozen to the glass
before you turn the wipers on. Loosen a wiper blade which is frozen
in place before operating the wipers to prevent damage to the wiper
blade or the wiper motor.
• Do not use the wipers to clear a frosted window . Using the
wipers as a convenient ice scraper will destroy the wiper blades.
• Before you take your vehicle to an automatic car wash, make sure
you have the windshield wiper system switched off (lever in position
0), 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.
Controls and equip ­
ment
Clear vision
• 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 52, "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 52,
fig. 40.
• Make sure the washer fluid reservoir in the engine compartment
is topped off before going on a long trip. Look up~
page 233 for
checking and filling the washer container .
• The wipers only operate with the hood completely closed. •
Applie s to v ehi cles: with he adli gh t wash er syst em
Headlight washer system
The headlight washer system cleans the headlights.
Operate the windshield wiper/washer system=> page 60,
fig. 50 ® 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. •
I • •

Activating /re ac tiv ating auto dimming
- Press button @
briefly, -the green indicator light ®
goes on.
Aut om ati c dimmin g fun ction
The automatic dimming function is activated every time the ignition
is turned on. The green indicator light is lit to indicate auto dimming
is active .
When dimming is activated, the inside mirror will darken
automati ­
cally
in response to the amount of light striking the mirror (such as
headlights from rearward approaching vehicles). Even in dimming
mode, the mirror surface turns bright when :
• the interior light is switched on
• reverse gear is engaged .
Sensors for automati c headligh ts *
With the help of the sensors in the mirror, when the light switch is
in the
AUTO posi tion, the low beams are switched on and off auto ­
matically depending on the ambient light conditions=>
page 52.
& WARNING
The glass of the inside rearview mirror is l ayered and contain s an
e lectrolyt e to a chieve its pr opert ie s . Be aware of liquid electr olyte
le aki ng fr om a broken mirror glass . This l iquid can cause irritation
to skin , eyes , and r espiratory sy stem .
• If you get ele ctrolyt e in your e yes or on your sk in , immediately
rin se with p lenty of water . If irritation per sists, s eek medical atten ­
tio n.
0 Note
Liquid electrolyte leaked from a broken mirror glass wi ll damage any
p lastic surfaces it comes in contact with. Clean up spilled electrolyte
immediately wi th clear wa ter and a sponge .
Contro ls and eq uip­
ment
Clear vision
[ i ] Tip s
• If you switch off the automatic di mming function on the in side
mirr or, automatic dimming of the outside mirrors w ill like wise be
di sabled .
• Check to make sure there are no objects preventing light from
reaching t he inside mirror.
• Do no t attach any stickers to the windshield in front of the two
light sensors, as this would interfere with both the automatic oper­
ation of the headlights and the automatic dimming of the inside
mirror(sl. •
Outside mirrors
The outside mirrors are electrically adjusted.
Adjusting the outside mirrors
Fig. 5 5 F orw ar d
s e ctio n of dri ver's
arm rest: pow er m irr or
co ntr ols
Tu rn th e adjust ing knob to pos iti on Q => fig . 55 to adjust
t h e outs ide mirror on t he driver's side .
Tu rn the adjusting knob to position @to adjust the
o utside m irror o n the passenger side .
Press the knob in the appropr iate d irection to
move the
m irror surface so that you have a good view to the rear .
1)1,
Vehicle care I I irechnical data

-Wit h a manual transm issi on, engage 1st gea r, or with a n
a utomatic transmission place the se lector lever in P
=> & .
- Remove the ignition key from the ignit io n lock.
Wha t el se you should do wh en parking yo ur v ehi cle on
a n incli ne or d ecline
Turn the steering whee l so that if the vehicle shou ld start to rol l, it
wi ll roll into the curb.
I f you are park ing on a
decline (the front of you r ve hicle facing
downhill) , turn the front wheels to the right so that they poin t
toward the curb .
If you are park ing on an in cline (the font of your vehicle facing
uphill!, turn the front whe els to the left so that they point
away from
the curb .
& WARNING
This is how you can reduce the ri sk of injury when le avi ng your
vehicle .
• Never p ark the vehi cle w here it can come
in cont act w ith dry
gra ss, s pilled fuel or any other flammable mater ial s.
• Never allow anyone -espe cially small ch ildren -to remain
in the
vehicle when it is locked . Locked doors make it more difficult for
re scu ers to ac ce ss the pa ssenger compartment in the e vent of an
emergency . Danger to life!
• Never lea ve childr en un super vis ed in the vehicle . Children
c ould release the parking brake or move the gearsh ift l ever out of
gear . The vehicle could start to r oll away a nd cau se an a ccident .
• No matter what the season i s, the temperature
in a parked
v ehi cle can reach dangerou s level s. •
Controls and equip ­
ment
On th e road
Acoustic parking system
Applies to veh ic les : wit h 4 -ch anne l a cou stic park ass is t
Rear acoustic park assist
Acoustic park assist gives a warning a bout o bstacles
behind the vehicle.
Description
The rear acoustic park assist (4 -channel acoustic park assist) deter ­
mines the d istance of the vehic le from an obstac le using u ltrasonic
sensors. The sensors are in the rear bumper. The volume and the
pitch of the chimes can be adjusted through the menu display
=> page 27.
The range at which the sensors start to m easure is about :
To the side
Center rear
Acti v atio n
2 feet (0 .60 m)
5 feet (1.60 ml
The pa rking assist is activated when rever se ge ar is engaged . A brief
tone confirms that the system is activated .
Backing up
Distance warning when backing up starts when an obstacle is
detec ted in the range of the park ass ist system . As the distance
decreases, the time interval between the aud ible tones becomes
shorter .
When the distance is less than 1 foot (0.30 m) , the tone becomes
continuous . At this point you should stop backing up.
Please note that low objects a lready signalled by a warning can
disappear from the sys tem's detection range and wil l not continue
t o be signa lled . ..,
I • •

On the ro ad
Pote nt ial malf un cti ons
If a warning buzzer sounds for a few seconds when the ign ition is
switched on, there is a system malfunction with the acoustic park
assist. If the malfunction persists until the ignition is switched off,
there will be no acoustic warning at the next attempt to activate the system. Have the problem corrected.
There is no confirmation tone when reverse gea r is engaged if there
is a system malfunction .
For the parking assist to operate, the sensors must be kept clean
and free of ice.
& WARNING
• Sen sor s hav e blind spots in w hic h obj ec ts can not b e dete cted.
P ay s pecial attenti on to small childr en and anim als . They cannot
al ways be dete cte d b y the sensor s -dan ger of an accident !
• The p arking a ssis t cann ot r eplace th e driver' s attention . The
d rive r alone is re spon sible f or p ark ing an d simil ar d riv ing mane u­
ver s. A lway s wat ch whe re you are driving .
(D Note
Low obstacles a lready signa lled by a warn ing can disappear from
the system's detection range as they are approached and wi ll not
continue to be signalled. Objects such as barrier chains, trailer draw
bars, thin pa inted vertical poles , or fences may not be detected by
the system -risk of damage.
[ i J Tip s
For the parking assist to operate, the sensors must be kept clean
and free of snow and ice. •
Cruise control
Switching the system on
The cruise control system makes it possible t o drive at a
constant speed sta rting at 20 mph (30 km/h) .
Ai------
I
Fig . 8 1 Contr ol l ever
w ith se t butt on
Fig . 8 2 Displ ay:
Se lec te d spee d
Pull the lever to position G) ~ fig. 8 1 to switch the
system on.
Drive at the speed y ou wis h to se t.
Press but ton
@ to set that speed.
The display~ fig. 82 will show the set speed. The display may vary
depending on the type of display in your vehicle . The indicator light
~

Safety b elts -----------------=-----
Safety belt pretensioners
How safety belt pretensioners work
In front and side collisions above a particular severity,
safety belts in use are tensioned automatically.
T he safety belts for the front seating positions are equipped with
safety belt prete nsioners. The system is activated by sensors in
front and side co llisions of great severity. This tightens the belt and
takes up belt slack~
& in "Se rvice and d isposal of safety belt
pretensioner". Taking up the slack he lps to reduce forward occupant
movement during a co llision .
[ i] Tip s
The safety belt p retensione r can on ly be activated once.
• I n minor frontal and side collis ions, in rear -end collisions, in a
rollover and in accidents involving very litt le impact fo rce, the safety
belt pretensioner are not activated.
• When the safety be lt pretensioner is activated, a f ine dust is
released . This is normal and is not caused by a fire in the vehicle.
• The relevant safety require ments must be observed when the
vehicle or components of the system are scrapped. A qualified deal ­
ership is fami liar with these regulat ions and wil l be p leased to pass
on the information to you.
• Be su re to observe al l safety, env ironmen ta l and othe r regula ­
tions if the vehicle or individual parts of the system, particu larly the
safety belt or airbag, are to be disposed . We recommend you have
your authorized Audi dealer perform this service for you. •
Controls and equip­
ment Safety first Vehicle operation
Service and disposal of safety belt
pretensioner
The safety belt pretensioners a
re parts of the safety belts on your
Audi. Insta lling, removing, servicing or repair ing of belt preten­
sioners can damage the safety belt system and prevent it from
work ing correctly in a collision.
There are some important things you have to know to make sure
that the effect iveness of the sys tem will not be impai red and that
discarded components do not cause injury or pol lute the environ­
ment .
& WARNING
Improper ca re, servicing and repair procedure s can increa se the
ri sk of personal injury and death b y preventing a safety belt
preten sioner from a ctivating when needed or activating it unex ­
pe ctedly :
• The belt preten sioner system can be a ctivated only once.
If belt
preten sioner s ha ve been a ctivated , the syste m mu st be repla ced .
• Never repair , adju st, or change any part s of the safety belt
system.
• Safety belt system s including safety belt preten sioners cannot
be repai red . S peci al pro cedures are required for removal , installa ­
tion and di spo sal of thi s syste m .
• For an y work on the s afety belt system, we strongl y re com­
mend that you see your authorized Audi dealer or qualified techni ­
c ia n who h as an Audi approved repa ir m anual , train ing and spe cia l
equipment nece ssary .
W For the sa ke of the environment
Undeployed airbag modu les and pretensioners might be c lassified
as Perchlorate Material -special handling may apply, see
www .dtsc.ca .gov/hazardouswaste/perchlo rate . When the vehicle or ..,_
Vehicle care Do-it-yourself service Technical data

___ A_ ir_ b_ a-g _ s_y _s_ t_ e_ m _________________________________________________ _
& WARNING (continued)
• If you must install a rearward facing child safety seat on the
front passenger seat because of exceptional circumstances and
the PASSENGER AIR BAG OFF light does not come on and stay on,
immediately install the rear-facing child safety seat in a rear
seating position and have the airbag system inspected by your
Audi dealer.
& WARNING
If, in exceptional circumstances, you must install a forward-facing
child restraint on the front passenger's seat:
• Always make sure the forward -facing seat has been designed
and certified by its manufacturer for use on a front seat with a
passenger front and side airbag.
• Never put the forward-facing child restraint up against or very
near the instrument panel.
• Always move the passenger seat into its rearmost position in
the seat's fore and aft adjustment range, as far away from the
airbag as possible, before installing the forward-facing child
restraint . The backrest must be adjusted to an upright position.
• Make sure that the PASSENGER AIR BAG OFF light comes on
and stays on all the time whenever the ignition is switched on. •
Advanced Airbag System components
The front passenger seat in your vehicle has a lot of very important
parts of the Advanced Airbag System in it. These parts include the
weight-sensing mat, sensors, wiring, brackets, and more. The func­
tion of the system in the front passenger seat is checked by the elec ­
tronic control unit when the ignition is on. The control unit monitors
the Advanced Airbag System and turns the airbag indicator light on
when a malfunction in the system components is detected. The
function of the airbag indicator light is described in greater detail below
. Because the front passenger seat contains important parts
of the Advanced Airbag System, you must take care to prevent it
from being damaged. Damage to the seat may prevent the
Advanced Airbag for the front passenger seat from doing its job in
a crash .
The front Advanced Airbag System consists of the
following:
• Crash sensors in the front of the vehicle that measure vehicle
acceleration/deceleration to provide information to the Advanced
Airbag System about the severity of the crash.
• An electronic control unit, with integrated crash sensors for front
and side impacts. The control unit "decides" whether to fire the
front airbags based on the information received from the crash
sensors. The control unit also "decides" whether the safety belt
pretensioners should be activated.
• An Advanced Airbag with gas generator for the driver inside the
steering wheel hub .
• An Advanced Airbag with gas generator inside the instrument
panel for the front passenger.
• A weight-sensing mat under the upholstery padding of the front
passenger seat cushion that measures the total weight on the seat.
The information registered is sent continuously to the electronic
control unit to regulate deployment of the front Advanced Airbag on
the passenger side.
• An airbag monitoring system and indicator light in the instru ­
ment cluster ~
page 146.
• The PASSENGER AIR BAG OFF light comes on and stays on in the
center of the instrument panel~
page 147, fig. 113 and tells you
when the front Advanced Airbag on the passenger side has been
turned off.
• A sensor below the safety belt latch for the front seat passenger
to measure the tension on the safety belt. The tension on the safety
belt and the weight registered by the weight -sensing mat help the
control unit "decide" whether the front airbag for the front ..