2009 AUDI TT COUPE belt

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Whe n a person is detected on the front passenger seat, weighing
more than the to tal weight of a child t hat is about 1 year old
restrained in one of the rear-facing or forward -facing infant
restraints (listed in Federa l Motor Vehicle Safety Standard 208 with
which the Advanced Airbag System in your vehicle was certified), the front airbag on the passenger side may or may not deploy .
The
PA SSENGER AIR BAG OFF light comes on when the e lectronic
control unit detects a total weight on the front passenger seat that
requires the front a irbag to be turned off . If the
PA SSENGER AIR BAG
O FF
light does not come on, the front airbag on the passenger side
has not been tu rned off by the contro l u nit and can dep loy if the
control unit senses an impact that meets the conditions stored in its
memory .
I f the total weight on the front passenger seat is more than that o f
a typical
1 year -old, but less than the we ight of a small adult, the
front airbag on the passenger side may dep loy (the
PA SS ENGER AIR
BAG OFF
l ight does not come on).
For example , the airbag may deploy if :
• a small ch ild that is heavier than a typ ical 1 year-o ld child is on
the front passenger seat (regardless of whether the child is in one
of the child sa fety seats listed ~ page
159),
• a child who has outgrown child res traints is on the front
passenger seat.
I f the front passenger airbag is turned off, the
PASSENGER AIR BAG
O FF
light in the cen ter of the instrument panel wi ll co me on and stay
on .
T he front airbag on the passenge r side may
not deploy (the
PASS ENGER AIR BAG OFF light does not illuminate and stay lit) if:
• a small adult or teenager is on the front passenger seat
• a passenger who is not sitting upright with their back against a
non -reclined backrest with their feet on the vehicle floor in front of
the seat is on the front passenger seat.
I f the front passenger airbag dep loys, the Federal Standard requires
the airbag t o meet the "low risk" deployment criteria to help reduce
Controls and equip­ ment Safety first Vehicle operation the risk of injury through interaction with the airbag
. "Low risk"
dep loyment occurs in those crashes that ta ke place at l ower decel ­
erations as defined in the electronic control unit~ page
146.
Alway s remembe r: Even though your vehicle is equipped with
Advanced Airbags, the safes t place for chi ldren is properly
restrained on the back seat. Please be sure to read the important
informat ion in t he sections tha t follow a nd be sure to heed a ll of the
WARNINGS.
& WARNING
To reduce the risk of injury when an airbag inflates , always wear
s afety belts prope rly.
• If you are unrestrained , leaning forward , sitt ing s ideways or out
of position in any w ay, your risk of injury i s mu ch higher .
• You will al so receive se riou s injurie s and could even be killed if
you are up against the airbag or too clo se t o it when it inflate s -
even with an Advanced Airbag => page 135 .
& WARNING
A child in a rearward -facing child safety seat in stalled on the front
pa ssenge r seat will be ser iou sly injured and can be killed if the
front airb ag inflate s -even with an Advanced Airbag System .
• Although the Advan ced Airbag S ystem in your vehicle is
de signed to turn off the front airbag when a rearward -fa cing child
restraint h as been in stalled on the front pa ssenger seat , nobod y
c an ab solutely guarantee that deployment i s impo ssible in all
c onceivable situations that may happen during the useful life of
your vehicle .
• The inflating airbag will hit the ch ild s afety seat or inf ant
c arrier with great force and will smash the chi ld safety seat and
c hild ag ains t the ba ckre st, door , or roof .
• Always in stall rearward -facing child re straint s in the back seat ....
Vehicle care Do-it-yourself service Technical data

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& 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 ..

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passeng er seat shou ld be turn ed off or not~ page 137, "Ch ild
restr aint s o n the fro nt seat - some impor tant thin gs to know".
• A sensor in the safety belt latch fo r the d rive r and for the front
s e at pass enger th at s enses wh ether th at safe ty belt i s la tch ed o r not
and transmits this information to the e lectronic contro l unit.
& WARNING
Damage to the front passenger seat can prevent the front airbag
from working properly .
• Improper repair or disassembly of the front passenger and
driver seat will prevent the Advanced Airbag System from func ­
tioning properly .
• Repairs to the front passenger seat must be performed by qual ­
ified and properly trained workshop personnel .
• Never remove the front passenger or driver seat from the
vehicle.
• Never remove the upholstery from the front passenger seat .
• Never disassemble or remove parts from the seat or disconnect
wires from it.
• Never carry sharp objects in your pockets or place them on the
seat . If the weight-sensing mat in the passenger seat is punctured
it cannot work properly.
• Never carry things on your lap or carry objects on the
passenger seat . Such items can increase the weight registered by
the weight-sensing mat and send the wrong information to the
airbag control unit .
• Never store items under the front passenger seat . Parts of the
Advanced Airbag System under the passenger seat could be damaged , preventing them and the airbag system from working
properly.
• Never place seat covers or replacement upholstery that have
not been specifically approved by Audi on the front seats.
Controls and equip­ ment Safety first
Vehicle operation
& WARNING (continued)
• Seat covers can prevent the Advanced Airbag System from
recognizing child restraints or occupants on the front passenger
seat and prevent the side airbag in the seat backrest from
deploying properly.
• Never use cushions, pillows, blankets or similar items on the
front passenger seat. The additional padding will prevent the
weight-sensing mat in the seat from accurately registering the
child restraint or person on the seat and prevent the Advanced
Airbag System from functioning properly .
• If you must use a child restraint on the front passenger seat
and the child restraint manufa cturer's instructions require the use
of a towel , foam cushion or something else to properly position
the child restraint, make certain that the PASSENGER AIR BAG OFF
light comes on and stays on whenever the child restraint is
installed on the front passenger seat.
• If the PASSENGER AIR BAG OFF light does not come on and stay
on , immediately install child restraint in a rear seating position
and have the airbag system inspected by your Audi dealer. •
How the Advanced Airbag System
components
work together
The front Advanced Airbag System and the side airbags suppl ement
the protection offe red by t he front t hree -point safety bel ts with
pretens ioners and load limiters and the ad justable head restraints
to help reduce the risk of in jury in a wide range of accident and
c ras h situati ons. Be sure to read t he impo rtant inf ormatio n abou t
safety and heed the WARNI NGS in th is chapter.
D ep loym ent of the A dva nce d Ai rbag Sy stem and the activati on of
th e safety be lt pretension ers depend on the decel eration measur ed
b y the c ra s h sens ors and regis te re d by th e electr onic control unit.
C rash severity depends on speed and decel eration as we ll as t he
mass and s tiff ness of the veh ic le or object in vo lved in the crash.
9J.
Vehicle care Do-it-yourself service Technical data

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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

PASSENGER AIR BAG OFF light
)
Fig. 113 Sec tion fr om
th e inst rum ent p anel :
PASSE NGER AIR B AG
OFF ligh t
The PASS ENGER AI R BAG OFF light is located in the center of the
instrument pane l
=> fig. 113.
The
PA SSE NGE R AIR BAG O FF light wil l come on and stay on to tell
you when the front Advanced Airbag on the passenger side has
been turned off by the electron ic control unit . Each time you turn on
the ignition, the
PA SS ENGER AIR BAG OFF light wi ll flash for a few
seconds and :
• will stay on if the front passenger seat is not occupied,
• will stay on if there is a small child or chi ld restra int on the front
passenger seat,
• will go out if the front passenger seat is occupied by an adult as
registered by the weight -sensing mat.
The
PAS SENGER AIR BAG OFF light mu st come on and stay on if the
ignition is on and
• a car bed has been instal led on the front seat, o r
• a rearward-facing child restraint has been installed on the front
passenger seat, or
• a forward-facing child restraint has been instal led on the front
passenger sea t, or
• the weight registered on the front passenger seat is equa l to or
less than the combined weigh t of a typica l 1 year-old restra ined in
Safety first
Airb ag sy ste m
one of the rear-facing or forward -facing infant restraints listed in
Federa l Motor Veh icle Safety S tandard 208 with which the Advanced
A irbag System in your vehicle was certified .
I f the front passenger seat is not occupied, the front airbag will not
deploy, and the
PASSEN GER AIR BA G OFF light will stay on . Never
install a rearward -facing child restraint on the front passenger seat,
t he sa fest place for a child in any kind of child restraint is at one of
the seating positions on the rear seat=>
page 137, "Child restraints
on the front seat- so me important things to know" and=>
page 157,
"Child Safety" .
If the PASSENGER AIR BAG OFF light come s on when one of the
conditions listed above is met, be sure to check the light regu lar ly
to make certain that the
PA SS ENGER AIR BAG OFF light stays on
continuously whenever the igni tion is on . If the
PA SS ENGER AIR
BAG OFF
light does not appear and not stay on all the time, stop as
soon as it is safe to do so and
• reactivate the system by turning the ignition off and then turning
it on again;
• remove and reinstall the child restraint. Make sure that the child
restraint is proper ly instal led and that the safety belt for the front
passenger seat has been correctly routed around the child restraint
as described in the child restraint manufacturer's instructions;
• make sure that the convertible locking feature on the safety belt
fo r the front passenger seat has been activated and that the safety
belt has been pulled tight . The belt must not be loose or have loops
of slack so that the sensor below the safety belt latch on the seat can
do its job
=> page 168.
• make sure that things that may increase the weight of the child
and child safety seat are not being transported on the front
passenger seat;
• make sure that the safety belt tension sensor is not blocked.
Shake the safety belt latch on the front passenger seat back and
forth;
• If a strap or te ther is being used to tie the child sa fety seat to the
front passenger seat, make sure that it is not so tight that it causes
~
Vehicle care I I irechnical data

-L~A:::..:,: ir:....: b:!..::: a~g L.:: s:1y :...:s::..: t~ e:.: m:...:...:.. ________________________________________________ _
& 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. ..

& WARNING
Items stored between the safety belt buckle and the center
console can cause the sensors in the buckle to send the wrong
information to the electronic control module and prevent the
Advanced Airbag System from working properly.
• Always make sure that nothing can interfere with the safety
belt buckles and that they are not obstructed.
Undeployed airbag modules and pretensioners might be classified
as Perchlorate Material -special handling may apply, see
www.dtsc.ca.gov/hazardouswaste/perchlorate. When the vehicle or
parts of the restraint system including airbag modules safety belts
with pretensioners are scrapped, all applicable laws and regula­
tions must be observed. Your authorized Audi dealer is familiar with
these requirements and we recommend that you have your dealer
perform this service for you. •
Safety first
Knee airbags
Description of knee airbags
Airbag system
The airbag system can provide supplemental protection
to properly restrained front seat occupants.
Fig. 114 Driver 's
airbag
The airbag for the driver is located in the instrument panel under ­
neath the steering wheel=> fig. 114, the airbag for the passenger is
at about the same height in the instrument panel underneath the
glove compartment.
The knee airbag offers additional protection to the driver's and
passenger's knees and upper and lower thigh areas as a supple­
ment to the safety belts.
If the front airbags deploy, the knee airbags also deploy in frontal
collisions above a certain severity=>
page 144, "More importan t
things to know about front airbags".
Besides their normal safety function, safety belts work to help keep
the driver or front passenger in position in case of a frontal collision
so that the airbags can provide protection.
The airbag system is not a substitute for your safety belt. Rather, it
is part of the overall occupant restraint system in your vehicle.
Always remember that the airbag system can only help to protect
you if you are wearing your safety belt and wearing it properly. This •
Vehicle care I I irechnical data