2017 AUDI TT ROADSTER Owners Manual

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in fact is not, or that the person on the seat
is heavier than he or she actually is. The
change in electric capacitance because of
such objects can cause the passenger front
airbag to be turned on when it should be
off, or can cause the a irbag to work in a way
that is diffe rent from the way it would have
wor ked witho ut objects on the seat.
- Always make sure that there is nothing on
the front passenger seat that w ill cause the
capacit ive passenger detection system in
the seat to signa l to the Airbag System that
the seat is occupied by a person when it is
not, or to signa l that it is occupied by some­
one who is heavier than the person actua lly
sitting on the seat. The presence of an ob­
ject could cause the passenger front a irbag
to be t urned on when it should be off, or
cou ld cause the ai rbag to work in a way that
is d ifferent from the way it wou ld have
wor ked witho ut the ob je ct on the seat.
A WARNING
The fine dust create d when air bags deploy can
cause breathing problems for peop le w ith a
history of asthma or other breathing condi­
tions .
- T o reduce the risk of breathing problems,
those with asthma or other respiratory con ­
ditions should get fresh air right away by
gett ing out of the veh icle or opening w in­
dows o r doors.
- If you are in a collision in which airbags de­
ploy, wash your hands and face with mild
soap and water before eat ing.
- Be careful not to get the dust into your eyes,
or into any cuts or scratches.
- If the resid ue should get into your eyes,
flush them with water.
Airb ag sys tem
Monitoring the
Advanced Airbag System
Airbag monitoring indicator light
Two separate indicators monitor the function of
the Advanced Airbag System: the
El light and
the
PASSENGER AIR BAG OFF "1; ON @ light.
T he Advanced A irbag System as well as the side
airbags with e jection m itigation features (i nclud­
i ng the e lectron ic cont rol unit, senso rs and sys­
tem wiring) are all monito red contin uous ly to
make sure that they are functioning properly
whenever the ignition is on. Every t ime you turn
on the ignition, the a irbag system indicator light
El w ill come on for a few seconds (function
check).
The system mu st be in spected wh en the
i ndicator light
E,I:
- does not come on when the ignition is switched
on,
- does not go out a few seconds after you have
sw itched on the ignition, or
- comes on while driv ing.
If an airbag system mal func tion is detected, the
indicator light will come on to serve as a constant
reminder to have the system inspected immedi­
ately.
If a ma lfunction occurs that turns the front air ­
bag on the passenger side off, the
PASSENGER
AIR BAG O FF
"1 ; light will come on and stay on
whenever the ignition is on.
A WARNING
An a irbag system that is not functioning prop­
erly cannot prov ide supplemental protect ion
i n a fronta l crash.
- If the airbag ind icator light
~page 14
comes when the veh icle is being used, have
the system inspected immediately by your
author ized Audi dealer.
It is possib le that
the airbag will inflate when i t is not sup­
posed to, or w ill not inf late w hen it should.
207

Airbag system
PASSENGER AIR BAG OFF 1!; ON @ light
F ig. 166 Sect ion from the headl iner: PASSENGER AIR BAG
O FF ~ ON@lig ht
The PASSENGER AIR BAG OFF~; ON @ light is
located in the he adliner
~ fig. 166 .
The PASSENGER AIR BAG OFF~; light w ill come
on and stay on to tell you whe n the front Ad­
vance d Ai rbag on t he passenger side h as been
turned off by the electronic control uni t. If the
bu lb for the
PASSENGER AIR BAG OFF 1i , ON @
light burns out, the airbag indicator light El will
come on to signal a malfunction in the Advanced
Airbag System. A lthough the burned-out bulb
w ill not change t he way the front passenger 's
fron ta l airbag works, it will no lo nger be possible
to use the
PASSENGER AIR BAG OFF~; ON @
light to ma ke sure tha t the ai rbag on/off s tat us is
corre ct for the occup ant on the fron t passe nger
se at. H ave the airbag system inspected immed i­
ately by your a uthorized Audi dea ler.
The PASSENGER AIR BAG OFF~; ON @ light
will blink for about 5 seconds when:
- the capacitive passenger de tect ion sys tem,
which sw itches the front seat passenge r's fron·
tal Adv anced Ai rb ag on and off, detect s a
c h ange in t he sta tus of the front passenge r
sea t.
As soo n as the
PASSENGER AIR BAG OFF ~; ON
@ ligh t stop s blinking, always ma ke sure tha t the
air bag statu s (on or off) as shown by t he light is
p roper for the age, s ize and ele ct ric al c ap acitance
of the person occupy ing the front passe nger
seat . A lways make s ure that the safety belt for
the front passenge r seat is prope rly fasten ed.
The PASSENGER AIR BAG OFF ~; / PASSENGER
AIR BAG ON@ light will show the status of the
208
front seat passenger's frontal Advanced Airbag.
The PASSENGER AIR BAG OFF~; light:
- will c om e o n if the fr ont pas senge r seat is not
o ccupi ed;
- will c ome o n if the ele ctric al c apac itance meas·
ured by the capaci tive pas senger detectio n sys·
t ern for the fron t passenge r se at equ als the
combined capacitance of an infant up to about
one year of age and one of the rea rwa rd-faci ng
or forward -fac ing c hild rest raints listed in Fed­
eral Motor Vehicle Safety Standard 208 with
which the Advanced A irbag System in your vehi·
cle was cert ified; For a listing of the ch ild re·
strai nts that we re us ed to certify yo ur vehicle's
complia nce w it h t he U.S . Safe ty S tanda rd
¢ page 220 .
-will go out if the front p assenge r seat is occu­
pie d by an adu lt as regis te re d by the capac itive
passe nger detect io n sys tem.
- The
PASSENGER AIR BAG OFF~; light mus t
come on and sta y on if the ig nition i s on a nd ...
- a ca r bed has been ins talled o n the front pas·
senge r sea t, or
- a rea rwa rd -facing child restrain t has been in·
s talled on the front passenger s eat, or
- a forward -fac ing ch ild restraint has been insta l·
led on the fro nt passenger sea t,
- and if the electrical capacitance registe red on
the front passenge r seat is equal to or less than
t he co mbine d capacitance of a typical 1 y ear·
old inf ant and o ne of th e rea rw ar d-facing or
forw ard-fa cing c hild r estra in ts l iste d in Fe deral
Moto r Vehicle S afety S tandar d 208 with which
the Adva nced Airbag System in your veh icle was
certif ied.
If t he fron t passenger se at i s not occup ied, the
fr ont airba g will not deploy, a nd the
PASSENGER
AIR BAG OFF~;
light w ill stay on .
Neve r ins tall a rea rw ar d-f a cing child res tra int on
th e fr on t passenger sea t
¢ page 19 7, C hild re­
s traints on the front seat -some importan t
things to know
and ¢ page 21 8, Child safety .
If the PASSENGER AIR BAG OFF ~; light
comes on ...
If th e PASSENGER AIR BAG OFF~; ligh t comes
o n when one of the condit ions listed above is
Ill-

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met, be sure to check the light regularly to make
certain that the
P A SSENGER AIR BAG OFF '-1;
light stays on continuously whenever the ignition
is on. If the
PAS SENGER AIR BAG OFF '-1; light
does not appear on and does not stay on all the
time, stop as soon as it is safe to do so and
- reactivate the system by turning the ign ition
off for more than 4 seconds and then turning it
on again;
- remove and reinstall the child restraint. Make sure that the child restraint is properly instal­led and that the safety belt for the front pas­
senger seat has been correctly routed through
the child restraint as descr ibed in the child re­
straint manufacturer's i nstructions;
- make sure that the convertible locki ng retrac­
tor on the safety be lt for the front passenger
seat has bee n activated and that the safety belt
has been pulled tight.
- make sure that no electrical device (such as a
laptop, CD player, electronic games device,
power inverter or seat hea ter for child seats) is
placed or used on the front passenger seat if
the device is connected to the 12•volt socket or
the cigarette lighter socket;
- make sure that no seat heater has been retro ­
fitted or otherwise added to the front passen­
ger seat;
- make sure that nothing can interfere with the
safety belt buckles and that they are not ob­
structed;
- make sure that there are no wet objects (such
as a wet towel) and no water or other liquids on
the front passenger seat cush ion.
If the PASSENGER AIR BAG OFF~; light st ill
doe s not come on ...
If the PAS SENGER AIR BA G OFF '-1; light sti ll
does not come on and does not stay on continu­
ously (when the ignition is sw itched on),
- take the child restraint off t he front passenger
seat and have the airbag system inspected by
your Audi dealer immed iate ly.
Th e PASSENGER AIR BAG OFF~; light
should NOT come on ...
The PA SSENGER AIR BAG OFF ~ ; light should
NOT come on when the ign ition is on and an
Airb ag sys tem
adult is sitting in a proper seating pos ition on the
front passenger seat. If the
PASSENGER AIR
BAG OFF~;
light comes on and stays on whi le
driv ing, under these c ircumstances, make sure
that:
- the adult on the front passenger seat is proper­
ly seated on the center of the seat cushion w ith
his or her back up against the backrest and the backrest is not reclined,
- the adult is not taking we ight off the seat by
holding on to the passenger assist handle
above the front passenger door or support ing
their weight on the armrest,
- the safety belt is being properly worn and that
there is not a lot of slack in the safety belt web­
b ing ,
- there are no aftermarket seat covers or cush­
ions or other things (such as blankets) on the
front passenger seat that might cause the ca­ pacitive passenge r detection system to miscal­
culate e lectr ica l capaci ta nce.
' Important safety instructions on
monitoring the Advanced Airbag System
A WARNING
--- If the stat us of the Advanced Airbag System
has changed while the vehicle is moving, the
PASSENGER AIR BAG OFF '-1; ON @ light
blin ks for about 5 seconds to cat ch the driv­
er 's attent ion . If this happens, a lways stop
as soon as it is sa fe to do so and check the
steps described above .
- If the
PASSENGER AIR BAG OFF~; light
does not go off when an adult who is not
very small is sitting on the front passenger
seat after tak ing the steps described above,
have the airbag system inspected by your
author ized Audi dealer before t ransporting
anyone on the front passenger seat .
A WARNING ....._
An airbag system that is not functioning prop­
e rly cannot prov ide supplemental protect io n
i n a fronta l crash.
- If the ai rbag ind icator light
<=:> page 14
comes when the veh icle is being used, have
209

Airbag syste m
the system inspected immediately by your
authorized Audi dealer. It is possible that
the airbag will inflate when it is not sup­
posed to, or will not inflate when it should.
A WARNING
If the front airbag inflates, a child without a
child restra int, or in a rearward-facing child
safety seat, or in a forward-facing child re­
straint that has not been properly installed
w ill be seriously injured and can be killed.
- If you must install a rearward-fac ing child
seat on the front passenger seat because of
exceptional c ircumstances and the
PA SSEN ­
G ER AIR BAG OFF,;;
light does not appear
and stay on, have the airbag system inspect­
ed by your Audi dealer.
- If, in exceptional circumstances, you must
install a forward-facing chi ld restraint on
the front passenger seat, always move the
seat into its rearmost pos ition in the seat's
fore and aft adjustment range, as far away
from the airbag as possible. The backrest
must be adjusted to an upright posit ion.
Make s ure that the PASSENGER AI R BAG
OFF ,;;
light comes on and stays on a ll the
t ime whenever the ignition is switched on.
A WARNING
If the PAS SENGER AIR BAG OFF~; light does
not go out when an adult is s itting on the
front passenger seat afte r taking the steps
described above, have the airbag system in­
spected by your Audi dealer before transport­
ing anyone on the front passenger seat.
(D Tips
If the capacitive passenger detection system
determines that the front passenger seat is
empty, the frontal airbag on the passenger
side w ill be turned off, and the
PA SSENGER
AIR BA G OFF ~;
light will stay on.
Repair, care and disposal of the airbags
Parts of the a irbag system are installed at many
d ifferent places on your Aud i. Instal ling, remov-
210
ing, servicing or repairing a part in an area of the
vehicle can damage a part of an airbag system
and prevent that system from work ing properly
i n a coll is ion.
There are some important things you have to know to make sure that the effectiveness of the
system will not be impaired and that discarded
components do not cause injury or pollute the
environment.
A WARNING
Improper care, servicing and repair proce­
dures can increase the risk of personal injury
and death by preventing an airbag from de­
p loying when needed or deploy ing an a irbag
unexpectedly:
-
- Never cover, obstruct, or change the steer­
ing wheel ho rn pad or airbag cover or the in­
strumen t panel or modify them in any way.
- Never attach any objects such as cup ho lde rs
or telephone mountings to the surfaces cov­
ering the a irbag un its.
- For cleaning the horn pad or instr ument
panel, use only a soft, dry doth or one mois­
tened w ith plain water. Solvents or cleaners
could damage the airbag cover or change
the st iffness or strength of the material so
that the airbag cannot deploy and protect proper ly.
- Never repair, ad just, or change any parts of
the airbag system.
- All work on the steering wheel, inst rument
panel, front seats or e lectr ica l system (in­
cluding the installation of audio equ ipment,
cellular te lephones and CB radios, etc.)
m ust be perfo rmed by a qualified techn ician
who has the training and spec ial equipment
necessary.
- For any work on the airbag system, we
strong ly recommend tha t you see you r au­
thori zed A udi dealer or qualified wo rkshop.
- Never modify the front bumper or pa rts of
the vehicle body.
- Always make sure that the side a irbag can
inflate w ithout interfe rence:

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-Never install seat covers or replacement
upholstery over the front seatbacks that
have not been specifically approved by
Audi.
- Never use additional seat cushions that
cover the areas where the side airbags in­
flate.
- 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 deploy only once. Af­
ter an airbag has been deployed, it must be
replaced with new replacement parts de­
signed and approved especially for your
Audi model version. Replacement of com­ plete airbag systems or airbag components
must be performed by qualified workshops
only. Make sure that any airbag service ac­
tion is entered in your Audi Warranty
&
Maintenance booklet under AIRBAG RE­
PLACEMENT RECORD.
- For safety reasons in severe accidents, the
alternator and starter are separated from
the vehicle battery with a pyrotechnic circuit interrupter.
- Work on the pyrotechnic circuit interrupt­
er must only be performed by a qualified
technicians who have the experience, in­
formation and special tools necessary to
perform the work safely.
- If the vehicle or the circuit interrupter is
scrapped, all applicable safety precautions must be followed.
@ For the sake of the environment
Undeployed airbag modules and pretension­
ers might be classified as Perchlorate Materi­
al -special handling may apply, see
www.dtsc.ca.gov/hazardouswaste/perchlo­
rate. When the vehicle or parts of the re­
straint system including airbag modules and
safety belts with pretensioners are scrapped,
all applicable laws and regulations must be
observed. Your authorized Audi dealer is fa­
miliar with these requirements and we recom­
mend that you have your dealer perform this
service for you.
Airbag system
Other things that can affect Advanced
Airbag performance
Changing the vehicle's suspension system can
change the way that the Advanced Airbag System
performs in a crash. For example, using tire-rim
combinations not approved by Audi, lowering the
vehicle, changing the stiffness of the suspension, including the springs, suspension struts, shock
absorbers etc . can change the forces that are
measured by the airbag sensors and sent to the
electronic control unit. Some suspension changes
can, for example, increase the force levels meas­
ured by the sensors and make the airbag system
deploy in crashes in which it would not deploy if
the changes had not been made. Other kinds of
changes may reduce the force levels measured by
the sensors and prevent the airbag from deploy­ ing when it should.
A WARNING
-Changing the vehicle's suspension including use of unapproved tire-rim combinations can
change Advanced Airbag performance and in­
crease the risk of serious personal injury in a
crash.
- Never install suspension components that
do not have the same performance charac­
teristics as the components originally instal­
led on your vehicle.
- Never use tire-rim combinations that have
not been approved by Audi.
211

Airbag system
Knee airbags
Description of knee airbags
The knee airbag system can provide supplemen­
tal protection to properly restrained front seat
occupants.
Fig. 167 Driver's knee airbag
The driver knee airbag is in the instrument panel
underneath the steering wheel¢
fig. 167, 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 and supplements the protec­
tion provided by the safety belts.
If the front airbags deploy, the knee airbags also
deploy in frontal collisions when the deployment
threshold stored in the control unit is met
¢ page 205, More important things to know
about front airbags.
In addition to their normal safety function, safe­
ty belts help keep the driver or front passenger in
position in a frontal collision so that the airbags
can prov ide supplemental protection.
The airbag system is not a substitute for your
safety belt. Rather, it is part of the overall occu­
pant restraint system in your vehicle. Always re­
member that the airbag system can only help to
protect you if you are wearing your safety belt
and wearing it properly . This is why you should
always wear your safety belt, not just because
the law requires you to do so ¢
page 189, Gener­
al notes.
212
Remember too, airbags will deploy on ly once and
on ly in certain kinds of accidents -your safety
belts are always 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 vehicle 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 belt . The airbag
system works most effectively when used with
the safety belts. Therefore, always wear your
safety belts correctly.
It is important to remember that while the sup­
plemental knee airbag system is designed to re­
duce the likelihood of serious injuries, other inju­
ries, for example, swelling, bruising and minor
abras ions and friction burns can also occur when
an airbag inflates.
The knee airbag system basically consists of:
-The electronic control module
- Two inflatable airbags (airbag and gas genera-
tor), one for the driver and one for the front
passenger
- The airbag warning light in the instrument clus-
ter
The knee airbag system will not deploy:
-when the ignition is switched off
- in frontal collisions when the decelerat ion
measured by the control unit is too low
- in side collisions
- in rear-end co llisions
- in rollovers
- in the event of a system malfunction (warning/
ind icator light is on) ¢
page 14 .
&_ WARNING
-Safety belts and the airbag system can only
provide protection when occupants are in
the proper seating position ¢
page 205.
-If the airbag ind icator light¢ page 14
comes when the vehicle is being used, have
the system inspected immediately by your
authorized Audi dealer.
It is possible that
the airbag will inflate when it is not sup ­
posed to, or wi ll not inflate when it should.

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How knee airbags work
The risk of injury to the leg area can be reduced
by fully inflated kn ee airbags.
Fig . 168 Inflated airbags protecting in a fronta l collision
The knee airbag system has been designed so
that the airbags for the driver and front passen­ ger deploy in certain but not all frontal collisions .
If the front airbags dep loy, the knee ai rbags also
deploy in fronta l co llisions when the dep loyment
threshold stored in the contro l unit is met.
When the sys tem dep loys, the airbags fill with a
propellan t gas, and inf late between the lowe r
part of the instrument panel and the driver and
the lower pa rt of the instrument panel and the
front passenger ¢
page 205, fig. 165.
Although they are not a soft pi llow, they can
"c ushion" the impact and in this way they can
he lp to reduce the risk of injury to the lower ex­
tremities.
All of this ta kes place in t he b lin k of an eye, so
fast that many people don't even realize that the
airbags have dep loyed . The airbags also inflate
with a great deal of force and it is important for
occupant safety that nothing should be in their
way when they deploy .
F u lly inflated airbags in combination with proper­
ly worn safety belts slow down and limit the oc­
cupant 's forward movement and help to reduce
the r isk of injury.
Airb ag sys tem
Important safety instructions on the knee
airbag system
Airbags are only supplemental restraints . Always
wear safety belts correctly and ride in a proper
seating position .
There is a lot that you and yo ur passenger must
know and do to help the safety belts and ai rbags
to provide supp lemental protect ion.
A WARNING ~
An inflat ing knee a irbag can cause se rious in-
jury. Wearing safety be lts incorrectly and im­
proper seating positions increase the risk of
serious personal injury and death whenever a
vehicle is being used.
- The knee airbag system cannot protect yo u
proper ly if yo u are seated too close to any of
the airbag locations. When adjusting t heir
seat pos itions, it is important that both the
driver and the front passenger keep their
uppe r bodies and knees at the fo llow ing
m inim um safe d istan ces:
- at least 10 in (25 cm) between the chest
and t he steering wheel/instrument panel.
- at least 4 in (10 cm) between the knees
and t he lower part of the instrument pan­
el.
- The risk of personal inj ury increases if you
lean forward or to the side, or if the seat is
improperly positioned and you are not wear­
ing your safety belt. The risk increases even
more should the airbag deploy .
- Always make sure that the knee a irbag can
inflate w ithout interference. Objects be­
tween you and the airbag can increase the risk of injury in an accident by inte rfe ring
wit h the way the airbag deploys or by bei ng
pushed into yo u as the ai rbag deploys.
- Never let anybody, especially children or
anima ls r ide in the footwell in front of the
passenger seat. If the airbag deploys, this
can result in serious or fatal i njuries .
- Never carry objects of any kind in the foot­
well a rea in front of the driver's or pas­
senger's seat. Bulky objects (shopp ing
bags, fo r example) ca n in terfere with or
~
213

Airbag system
prevent proper deployment of the airbag.
Small objects can be thrown through the
vehicle if the airbag deploys and injure you
or your passenger .
- Make sure there are no cracks, deep scratch­
es or other damage in the area of the instru­
ment panel where the knee airbags are lo­
cated.
- If children a re incorrect ly seated, their risk
of injury increases in a collision
c::> page 218, Child safety.
Side airbags
Description of side airbags
The airbag system can provide supplemental
protection to properly restrained occupants.
F ig. 169 Side airbag locat ion in t he drive r's seat
The side airbags are located in the sides of the
front seat backrests
c::> fig. 169 facing the doors .
They are identified by the word "AIRBAG".
The side airbags installed for the front seating
positions have been designed and certified to
help reduce the risk of injury that can be caused
by airbags when they inflate, particularly when
the occupant sitting next to it is not seated prop­
erly. The side airbag for the front passenger seat
can be used with properly installed child re­
straints. Please be sure to read the important in­
formation and warnings whenever using a child
restraint in a vehicle: Safety belts
c::> page 189,
Airbag system c::>page 196, Child safety
c::> page 218 .
The side airbag system basically consists of:
- the electronic control modu le and external side
impact sensors
214
- the two side airbags located in the sides of the
front backrests
- the airbag warning light in the instrument clus-
ter.
The airbag system is mon itored electron ical ly to
make certain that it is functioni ng p roperly at all
times. Each time you turn on the ignition, the air­
bag 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
and head on the side of the vehicle that is struck
in a side collision. The airbag deploys in side im­
pacts and only when the vehicle acceleration reg­
istered by the control unit is high enough. If this
rate is below the reference value programmed in­
to the control unit, the side airbags will not be
trigge red, even though the car may be badly
damaged as a result of the collision .
It is not pos­
sible to define an airbag triggering range that
will cover every possible angle of impact, since
the circumstances will vary conside rably between
one collision and another. Important factors in­
clude, for example, the nature (hard or soft) of
the impacting object, the angle of impact, vehicle
speed, etc.
c::> page 216, Important safety in­
structions on the side airbag system .
Aside from their normal safety function, safety
belts work to help keep the driver or front pas­
senger in position in the event of a side collision
so that the side airbags can provide protect ion.
The airbag system is
not a substitute for your
safety belt. Rather, it is part of the overall occu­
pant restraint system in your vehicle . Always re­
member that the side airbag system can only
help to protect you if you are wear ing your safety
belt and wear ing it properly. This is another rea­
son why you sho uld always wear your safety
belts, not just because the law requires you to do
so
c::> page 189, General notes.
It is impo rtant to remember that while the sup­
plemental side airbag system is desig ned to re­
duce the likelihood of ser ious injuries, other inju­
ries, for example, swelling, bruising , friction
burns and minor abrasions can also be associated ..,.