2009 AUDI TT COUPE warning light

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When the electronic control unit registers a low severity crash and
th e safety belt is being used, the airbag will not deploy. If the safety
belt is not being used, the first stage deploys, followed by the
second stage after a much later time in the crash sequence.
If the electronic contro l unit registers a crash of medium severity,
the first stage of the airbag deploys followed by the second stage at
a much later time in the crash sequence -regardless of whether the
safety belt is being used or not . In higher severity crashes as regis­
tered by the e lectronic contro l unit, both the first and second stages
deploy almost at the same time.
On the passenger side, regardless of safety belt use, the airbag will
be turned off if the weight on the passenger seat is less than the
amount programmed in the electronic control unit . The front airbag
on the passenger side will also be turned off if one of the child
safety seats that has been certified under Federal Motor Vehicle
Safety Standard 208 has been recognized on the seat. The
PASSENGER AIR BAG OFF light comes on and stays on to tel l you
when the front Advanced Airbag on the passenger side has been
turned off~
page 137, "Child restraints on the front seat -some
important things to know".
& WARNING
To reduce the risk of injury when an airbag inflates, always wear
safety belts properly .
• If you are unrestrained , leaning forward , sitting sideways or out
of position in any way, your risk of injury is much higher .
• You will also receive serious injuries and could even be killed if
you are up against the airbag or too close to it when it inflates -
even with an Advanced Airbag~
page 135 . •
More important things to knovv about front
airbags
Fig . 112 Inflated front
airbags
Safety belts are important to help keep front seat occupants in the
proper seated position so that airbags can unfold properly and
provide supp lemental protection in a fronta l collision.
The front airbags are designed to provide additional protection for
the chest and face of the driver and the front seat passenger when:
• safety be lts are worn properly,
• the seats have been positioned so that the occupant is properly
seated as far as possible from the airbag,
• and the head restraints have been properly adjusted.
Because airbags inflate in the blink of an eye with great force, things
you have on your lap or have placed on the seat cou ld become
dangerous projectiles, and be pushed into you if the airbag inflates .
When an airbag deploys, fine dust is released. This is normal and is
not caused by a fire in the vehic le. This dust is made up most ly of a
powder used to lubricate the airbags as they deploy. It could irritate
skin.
It is important to remember that while the supplemental airbag
system is designed to reduce the likelihood of serious injuries, other
injuries, for example swelling, bruising and minor abrasions, can
also happen when airbags inflate . Airbags do not protect the arms ._,

Airbag system 111111
---------------------------------------------=---='------
or the low er parts of the body. Front airba gs only suppl eme nt the
th ree point safe ty belt s i n so me frontal co lli sio ns in which t he
veh ic le dece lerat ion is h igh enou gh to deploy th e airbags.
Front airbags will not deploy:
• if the ignition is switched off when a crash occurs,
• in s ide collisions ,
• i n rea r- e nd c ollisions ,
• in ro llovers,
• when th e cras h d eceler ation m easured b y th e a irba g sys te m i s
less than the minimum threshold needed for airbag dep loyment as
r egi stere d by the ele ctronic control u nit.
The front passenger airbag will also not deploy :
• when the fron t passenger s eat i s not o ccupied,
• when the weight o n th e front pass enger seat as se nsed by the
Ad vanced Ai rbag S ystem indi cates tha t th e front airba g on the
pas senger side has to be tu rned off b y the e lectronic cont ro l unit
(th e PASSENGER AIR BAG OFF l ig ht co me s on and sta y s on ).
& WARNING
Sitting in the wrong position can increase the risk of ser ious injury
in crashes .
• To reduce the risk of injury when the airbags inflate , the driver
and passengers must always sit in an upright position , must not
lean against or place any part of their body too close to the area
where the airbags are located .
• Occupants who are unbelted , out of position or too close to the
airbag can be seriously injured by an airbag as it unfolds with
great force in the blink of an eye~ page 137.
Controls and equip­ ment Safety first
Vehicle operation
& WARNING
A child in a rearward-facing child safety seat installed on the front
passenger seat will be seriously injured and can be killed if the
front airbag inflates - even w ith an Advanced Airbag System .
• The inflating airbag will hit the child safety seat or infant
carrier with great force and will smash the child safety seat and
child against the backrest , center arm rest , door or roof.
• Always install rear-facing child safety seats on the rear seat .
• 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
Objects between you and the airbag will in crease the risk of injury
in a crash by interfering with the way the airbag unfolds or by
being pushed into you as the airbag inflates .
• Never hold things in your hands or on your lap when the vehicle
is in use .
• Never transport items on or in the area of the front passenger
seat. Objects could move into the area of the front airbags during
braking or other sudden maneuver and become dangerous projec­
tiles that can cause serious personal injury if the airbags inflate .
• Never place or attach accessories or other objects (such as cup
holders , telephone brackets , large , heavy or bulky objects ) on the
doors , over or near the area marked "AIRBAG " on the steering
wheel , instrument panel , seat backrests or between those areas
and yourself . These objects could cause injury in a crash , espe ­
cially when the airbags inflate .
• Never recline the front passenger's seat to transport objects.
Items can also move into the area of the side airbag or the front
IIJ,,
Vehicle care Do-it-yourself service Technical data

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& WARN ING (continued )
airbag during br aking or in a sudden m aneuver . Obje cts near the
airbags can become proje ctiles and cause injury , parti cularly when
the seat is re clined .
• Never tilt the front p assenger seat ba ckrest forward when the
vehi cle is moving . An inflating airbag will force the backrest back­
ward and can injure rear seat occupant s.
& WARNING
The fine dust created when airbags deploy can cause breathing
problems for people with a h istory of asthma or other breathing
conditions.
• To reduce the risk of breathing problems , those with asthma or
other respiratory conditions should get fresh air right away by
getting out of the veh icle or opening windows or doors .
• If you are in a collision in which airbags deploy , wash your
hands and face with mild soap and water before eating .
• Be c areful not to get the dust into your eyes , or into any cuts o r
scratches .
• If the residue should get into your eyes , flush them with
water .•
Monitoring the Advanced Airbag
System
Airbag monitoring indicator light :~
Two separ ate indi ca tor s m onitor the functi on of the
A dvance d Airbag Sys tem: th e air bag monitor ing i ndic ator
lig ht and t he
PASSENGER AIR BAG OFF light.
The Advanced Airbag Sys tem ( includ ing t he e lectronic co ntrol unit,
sensor circuits and system wiring ) is monito red continuous ly to ma
ke sure tha t it is functioning properly whenever the ignition is on .
Eac h tim e yo u turn o n the igniti on, the ai rbag m onito ring indica to r
li ght ~ wi ll come on for a few seconds (self diagnost ics).
The system must be inspected when the indicator light
m :
• does not co me o n w hen the igni tion is switche d on,
• does not go out a few seconds after you have switched on the
ig niti on, or
• comes on whi le driving.
If an a irbag sys tem malfu nction i s dete cted, the in dica tor lig ht will
first start f lashing to catch the driver 's attention and then stay on
c o nti nuou sly to serve as a c ons tan t re mind er to have the sys tem
inspected immediately.
I f a malfunction occu rs that turns the front airbag on the passenger
side o ff, the PASSENGER AIR BAG OF F lig ht w ill come on and stay on
whenever the ignition is on.
& WARNING
An airbag system that is not functioning properly cannot provide
supplemental protection in a frontal crash.
• If the airbag indicator light comes on , it means that there may
be something wrong with the Ad vanced Airbag System. It is
possible that the airbag will inflate when it is not supposed to , or
will not inflate when it should .
• Have the airbag system inspected immediately by your Audi
dealer .•

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the weight-sensing mat to measure more weight than is actual ly on
th e seat .
If the PASSENGER AIR BAG OFF light still does not come on and does
not stay on continuous ly (when the ignition is switched on),
• t ake the c hild res traint off t he front passe ng er seat a nd ins tall it
properly at one of the rear seat pos it ions. Have the a irbag system
insp ect ed by y our A udi deal er immedia tely .
• move the chi ld to a rear seat position and make sure that the
c h ild is pro pe rly restrai ned in a c hild restraint that is app ropriat e for
its size and age.
The
PASSENGER AIR BAG OFF l igh t sho uld NOT come on when the
ignition is on and an adult is sitt ing in a proper seating position on
the front passenge r seat . If the
PASSENGER AIR BAG OFF light
comes on a nd s tays o n or fl ashes for about 5 seco nds whi le d riving,
under these ci rcumstances, make sure that:
• the adult on the fron t pass enger sea t is pro perly s eate d on the
cent er of the seat cushion with his or her back up against the back ­
rest and the backrest is not reclined => page 116, "Proper occ upant
seating positions",
• t he ad ult is not ta king w eig ht o ff the sea t by hol ding o n to the
passenger assist hand le above the front passenger door or
su ppo rting their w eigh t on the arm res t,
• the safety be lt is being proper ly worn and that there is not a lot
o f sla c k in the sa fe ty b elt web bin g,
• accessory seat covers or cushions or other things that may cause
an incorrect read ing o r impression on t he w eight -s e nsi ng m at
under the upho lstery of the seat have been removed from the front
pass enger seat,
• a safety be lt extender has not been left in the safety be lt latc h for
th e fro nt passenger sea t.
In addition to the
PASSENGER AIR BAG OFF l ight in the center of the
instrument pane l, the mes sage
PASSENGER AIR BAG OFF o r
PASSENGER AIR BAG ON will br iefly appear in the instrument cluster display. This is to inform the driver of the curren
t front passenger
air bag status .•
Important safety instructions on monitoring
the Advanced Airbag System
& WARNING
An airbag system that is not functioning properly cannot provide
supplemental protect ion in a frontal crash.
• If the airbag indicator light comes on , it means that there may
be something wrong with the Advanced Airbag System . It is
possible that the airbag will inflate when it is not supposed to, or
will not inflate when it should .
• Have the airbag system inspected immediately by your Audi
dealer .
& WARNING
If the front airbag inflates , a child without a child restraint, in a
rear ward-facing child safety seat or
in a forward-facing child
restraint that has not been properly installed will be seriously
injured and can be killed .
• Even though your vehicle is equipped with an Advanced Airbag
System , make certain that all children , espec ially 12 years and
younger, always ride on the back seat properly restrained for their
age and size .
• Always install forward or rear -facing child safety seats on the
rear seat -even with an Advanced Airbag System .
• If you must install a rearward -facing child safety seat on the
front passenger seat be cause of exceptional cir cumstances and
the PASSENGER AIR BAG O FF light does not appear and stay on ,
immediately install the rear -facing child safety seat in a rear
~

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& W ARNING (continued )
seating position and have the airbag system inspected by your
Audi dealer .
• A tight tether or other str ap on a rearward-fac ing child restr aint
attached to the front pas senger seat can put too much pressure
on the weight-sensing mat in the seat and reg ister more weight
than i s actually on the seat. The heavier weight registered can
make the system work as though an adult were on the seat and
deploy the Advanced Airbag when it must be suppressed causing
s erious or even fatal injury to the child .
• If, in exceptional circumstance s, you mu st in stall a forward ­
fac ing child restra int on the front passenger seat , always move the
seat into its rearmost position in the seat 's fore and aft ad just ­
ment range , as far away from the airbag a s possible . The backrest
must be adjusted to an upright position . Make sure that the
PASSENGER AIR BAG OFF light comes on and stay s on all the time
whenever the ignition is switched on .
& WARNING
• If the PASSENGER AIR BAG OFF light does not go out when an
adult is sitting on the front passenger seat after taking the steps
described above, make sure the adult is properly seated and
restrained at one of the rear seating positions .
• Have the airbag system inspected by your Audi dealer before
transporting anyone on the front passenger seat .
[ i ] Tips
If the weight -sensing mat in the front passenger seat detects an
e mp ty seat, the fro nt air b ag on the pa ssenge r sid e will be t urned
off, and PASSENGER AIR BAG OFF will stay on.•
Controls and equip­ ment Safety first
Vehicle operation
Repair, care and disposal of the airbags
Parts of the airbag system are insta lled at many different places on
your Au di. In sta ll in g, re moving, ser vic in g or re pair in g a part in an
area of the vehicle can damage a part of an a irbag system and
pre ven t that system fro m wo rki ng p rope rly in a co llision .
There are some important things you have to know to make sure
that the effectiveness of the system will not be impai red an d that
d iscarded components do not cause inju ry or po llute t he e nv iron ­
ment .
& WARNING
Improper care , servicing and repair procedures can increase the
risk of personal injury and death by preventing an airbag from
deploying when needed or deploying an airbag unexpectedly:
• Never cover , obstruct , or change the steering wheel horn pad
or airbag cover or the instrument panel or modify them in any way .
• Never attach any obje cts su ch as cup holders or telephone
mountings to the surfaces covering the airbag units.
• For cleaning the horn pad or instrument panel, use only a soft ,
dry cloth or one moi stened with plain water . Solvents or cleaners
c ould damage the airbag cover or change the stiffness or strength
of the material so that the airbag cannot deploy and protect prop ­
erly .
• Never repair , adjust , or change any parts of the airbag system.
• All work on the steering wheel , instrument panel , front seats or
electrical system (including the installation of audio equipment ,
c ellular telephones and CB radios , etc .I must be performed by a
qualified technician who has the training and special equipment
necessary .
• For any work on the airbag system , we strongly recommend
that you see your authorized Audi dealer or qualified workshop .
• Never modify the front bumper or parts of the vehicle body .
Vehicle care Do-it-yourself service Technical data

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& WARN ING (continued )
• Always make sure that the side airbag can inflate without inter­
fe rence :
- Never install seat covers or replacement upholstery over the
front seatback s that have not been spe cifically approved by
Audi.
- Never use additional seat cushions that cover the areas
where the side airbags inflate .
- Damage to the original seat covers or to the seam
in the area
of the side airbag module must always be repaired immedi ­
ately by an authorized Audi dealer .
• The airbag system can be activated only once. After an airbag
ha s inflated , it must be replaced by an authorized Audi de aler or
qualified technician who has the technical information , training
and special equipment necessary .
• The airbag system can be deployed only once. After an airbag
has been deployed , it must be repla ced with new repla cement
parts designed and approved especially for your Audi model
version . Replacement of complete airbag systems or airbag
components must be performed by qualified workshops only .
Make sure that any airbag service action is entered in your Audi
Warranty
& Maintenance booklet under AIRBAG REPLACEMENT
RECORD .
• For safety reasons in severe accidents , the alternator and
starter are separated from the vehicle battery with a pyrotechn ic
circuit interrupter.
-Work on the pyrotechni c circuit interrupter must only be
performed by a qualified dealer -risk of an accident!
- If the vehi cle or the circuit inte rrupter is scrapped , all appli ­
cable safety precautions must be followed. •
Other things that can affect Advanced Airbag
performance
Changing the vehic le 's suspens ion system can change the way that
th e Adva nced Air bag Syste m performs in a c rash. Fo r example,
using tire -ri m co mbinations not approved by Audi, lowering the
veh ic le, c hang in g the st if f ness o f th e suspe nsio n, incl uding th e
spr ings, suspension struts, shock absorbers etc. can change the
f o rces t hat a re m easured by the a irba g se nsors and se nt to the elec ­
tronic control unit. Some suspension changes can, for example,
i ncrease the fo rce level s meas ure d by the senso rs and make the
a irbag system dep loy in crashes in which it wou ld not d ep loy if the
changes ha d no t been made . O th er ki nds of changes may red uce
th e force levels measured by the sensors and preve nt the airbag
fro m deploying w hen it sh ould.
Th e senso rs in th e sa fety belt buc kle fo r the dr iver a nd fro nt
passenger seat te ll the e lectronic control modu le if the safety belt is
l a tc h ed or not. If th e sa fe ty belt is being use d, th e front airbag wi ll
deploy at a slightly higher rate of vehic le dece leration than if the
sa fe ty be lt is n ot b ein g use d. Th ere fore, i n a partic ula r co llisi on, i t is
possible that an airbag wi ll not deploy at a seating position where
th e sa fe ty be lt is bei ng us ed bu t wi ll infl ate at the position w here the
safety be lt is not being used. It is important that nothi ng interfere
with the safety belt buc kles so that the sensors can send the co rrect
i nformatio n about safety belt use to t he electronic control unit.
& WARNING
Changing the vehicle's suspension including use of unapproved
tire -rim combinations can change Advanced Airbag performance
and increase the risk of serious personal injury in a crash.
• Never install suspension components that do not have the
same pe rformance characteristics as the components originally
installed on your vehicle.
• Never use tire -rim combinations that have not been approved
by Audi. ..

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is why you should always wear your safety belt, not just because the
law requires you to do so~
page 125, "General notes".
The safety belt buckle for the driver and front seat passenger have switches that tell the airbag control module if the safety belt is
being used or not . If the safety belt is being used, the knee airbag
will deploy at a slightly higher rate of deceleration than if the belt is
not be ing used. Therefore, in a part icular collision, it is possible that
an airbag will not deploy at a seating position where the safety belt
is being used but will inflate a t the position where the safety belt is
not being used .
Remember too, airbags wi ll deploy only once and only in certain
kinds o f accidents -your safety belts are a lways there to offer
protection in those accidents in which airbags are not supposed to
deploy or when they have already deployed, for example when your
vehic le strikes or is struck by another after the first collision .
This is just one of the reasons why an airbag is not a substitute for
the safety be lt . The airbag system works most effectively when used
with the safety bel ts. Therefore, always wear your safety belts
correctly .
It is important to remember that while the supplemental airbag
system is des igned to reduce the likelihood of serious injuries, other
injuries, for example, swelling, bruising, and minor abrasions can
a lso be associated with airbags.
Th e kn ee a irbag s ystem b asica lly con sist s of:
• The electronic control module
• Two inflatable airbags (airbag and gas generator!, one for the
driver and one for the front passenger
• The airbag indicator light in the instrument panel
T he kn ee airb ag sys te m will not depl oy:
• when the ignition is turned off
• in front -end col lisions when the deceleration measured by the
control unit is too low
• in side collisions •
in rear-end collisions
• in rollovers
• in the event of a system malfunction (warning/indicator light illu ­
m inated)~
page 18 .
& WARNING
• Safet y belt s a nd th e airbag sy stem can onl y pr ovi de prote ction
when o ccupants are in the prop er seating posit ion ~
pag e 144.
• If the airbag i nd ica to r light com es whe n the vehi cle is being
used , have the sy ste m in spected imm ediat ely by y our authori zed
Audi deale r. The a irbag ma y not work p roperly when the v ehicl e
acceler ation in a sid e co llision i s high enou gh to deploy th e airbag.
S ee als o~
pag e 18. •
How knee airbags work
The risk of injury to the leg area is re duced by fully
deployed knee airbags.
Fig . 115 Inf lat ed
a ir bags pro tec ting in a
fr ontal co llision
The knee airbag system has been designed so that the airbags for
the driver and fron t passenger are deployed in certain but not all
frontal co llisions. .,.

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Side airbags
Description of side airbags
The airbag system can provide supplemental protection
to properly restrained front seat occupants.
Fig. 1 16 S ide a irbag
l oca tion i n the drive r's
seat
The side airbags are located in the sides of the front seat backrests
~ fig. 116 facing the doors. They are identified by the word
"AIRBAG".
Th e s ide a irba g sys te m bas ica lly consis ts o f:
• the e lectronic control module and external side impact sensors
• the two side airbags located in the sides of the front backrests
• the airbag warning light in the instrument cluster .
The airbag system is monitored electronica lly to make certain that
it is functioning properly at all times . Each time you turn on the igni ­
tion, the airbag system indicator light will come on for a few
seconds (self diagnostics).
The side airbag system supplements the safety belts and can help
to reduce the risk of injury to the driver's and front passenger's
upper torso on the side of the vehicle that is struck in a side colli­
sion . The airbag deploys only in side impacts and only when the
vehic le acceleration registered by the control unit is high enough. If
this rate is below the reference value programmed into the control unit, the side airbags will not be
triggered, even though the car may
be badly damaged as a result of the collision. It is not possible to
define an airbag triggering range that wi ll cover every possible
angle of impact, since the circumstances will vary considerab ly
between one collision and another . Important factors include, for
example, the nature (hard or soft) of the impacting object, the angle
of impact, vehicle speed, etc.~
page 155, "Important safety
instructions on the side airbag system" .
Aside from their normal safety function, safety belts work to he lp
keep the driver or front passenger in position in the event of a side
collision so that the side airbags can provide protection.
The airbag system is
not a subs titute for your safety belt. Rather, it
is part of the overall occupant restraint system in your vehicle .
Always remember that the side airbag system can only help to protect you if you are wearing your safety belt and wearing it prop ­
erly. This is another reason why you should always wear your safety
belts, not just because the law requires you to do so~
page 125,
"General notes" .
It is important to remember that while the supplemental side airbag
system is designed to reduce the likelihood of serious injuries, other
injuries, for example, swel ling, bruis ing , and minor abrasions can
also be associated with deployed side airbags . Remember too, side
airbags will deploy only once and only in certain kinds of accidents
- your safety belts are a lways there to offer protection.
Vehicle damage, repair costs or even the lack of vehicle damage are not necessarily an indication of over-sensitive or failed airbag acti­
va tion . In some collisions, both front and side airbags may inflate .
Remember too, that airbags will deploy only once and only in
certain kinds of col lisions -your safety belts are a lways there to
offer protection in those accidents in which airbags are not
supposed to deploy or when they have already deployed .
The s ide a irba g sy stem wi ll not deploy :
• whe n the ignition is turned off
• in side collisions when the acceleration measured by the sensor
is too low
~