2012 AUDI S3 sensor

134 Airbag sys te m
Advanced Airbag System in your vehicle was
certified.
I f the front passenger seat is not occ upied,
the front airbag will not deploy, and the
PAS·
SENGER AIR B AG OFF
light will stay on. Nev ­
er insta ll a rearward-facing child restraint on
the front passenger seat, the safest place for
a child in any kind of child restraint is at one
of the seat ing positions on the rear seat
c:> page 123, Child restraints on the front seat
- some important things to know
and
c:> page 143, Child Safety .
If the PASSENGER AIR BAG OFF light comes
on
when one of the conditions listed above is
met, be sure to check the light regularly to
make certa in that the
PAS SENGER AIR BAG
OFF
light stays on cont inuous ly whenever the
i gnit ion is on.
If the PAS SENGER AIR BAG
OFF
li ght does not appear on and does not
stay on all the time, stop as soon as it is safe
to do so and
- react iva te the system by turning the ignition
off and then turning it on again;
- remove and re insta ll the chi ld restraint.
Make su re that the child res traint is properly
insta lled and that the safety be lt for the
front passenger seat has been correct ly
ro uted throug h the child restraint as descri­
bed in the chi ld restraint man ufacturer's in­
structions;
- make sure that the convertible locking fea ­
ture on the safety be lt for the front passen­
ger 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
t h at the sensor below the safety be lt latch
on the sea t can do its job
¢ page 152.
- make sure that th ings that may increase the
we ight of t he chi ld and child safety seat are
not be ing tra nspo rted on the front passen ­
ger seat;
- make su re that the safety be lt tension sen­
so r is not b locked. Shake t he safety be lt
l atch on the front passenger seatbac k and
forth;
- If a st rap or te ther is being used to tie the
child safety seat to the front passenger seat, make sure that
it is not so tight that it
causes the weight-sensing mat to measure
more weight than is act ually on the seat.
If the PASSENGER AIR BAG OFF light still
does not come on
and does not stay on con ­
tin uous ly (when the ignition is switched on),
- t ake the child res train t off the front passen-
ge r seat and ins tall it properly at one of the
rear seat positions. Have the airbag system
inspected by your authorized Audi dea ler
immed iate ly .
- move the child to a rear seat position and
make sure t hat the c hild is properly restra in­
ed in a ch ild restra int that is appropriate for
its size and age.
The
PASSENGER AIR BAG OFF light should
NOT come on when t he ignit ion is on and an
adult is s itting in a proper seating position on
the front passenger seat. If the
PASSENGER
AIR BAG OFF
light comes on and stays on or
flashes fo r about 5 seconds wh ile driving, un­
der these c ircumstances, make sure that:
- the adult on the front passenger seat is
properly seated on the center of the seat
cushion with his or her back up aga inst the
backrest and the backrest is not recl ined
c:> page 104, Proper seating position for the
driver,
- the adult is not tak ing weight off the seat by
holding on to the passenger assist handle
above the fron t passenger door or s upport­
ing their weight on the armres t,
- t he safety belt is be ing properly wo rn and
t hat the re is not a lot o f slack in the safety
be lt webb ing,
- accessory seat covers or cushions or othe r
t hings tha t may cause an incorrec t reading
or impression on the weight-sensing mat
under the upho lstery of the seat have been
removed from the front passenger seat,
- a safety belt extender has not been left in
the safety belt latch for the front passenger
seat.
In add ition to the
PASSENGER AIR BAG OFF
light in the center of the instrument panel,
the message
PASSENGER AIR BAG OFF or

Other things that can affect Advanced
Airbag performance
Changing the vehicle's suspension system can
change the way that the Advanced Airbag Sys­
tem performs in a crash. For example, us ing
tire-r im combinations not approved by Aud i,
lowering the vehicle, changing the stiffness of
the suspension, including the springs, suspen­ sion struts, shock absorbers etc. can change
the forces that are measured by the a irbag
se nsors and sent to the electron ic control
u ni t. Some suspens ion changes c an, for exam­
p le, increase the force levels measured by the
sensors and make the airbag system deploy in
crashes in w hic h it would not dep loy if the
changes had not been made. Other k inds of
changes may reduce the force levels meas­
ured by the sensors and prevent the airbag
from deploying when it shou ld .
The sensors in the safety belt buckle for the
driver and front passenger seat tell the elec­
tronic control module if the safety belt is
l atched or not. If the safety belt is being used,
the front airbag will deploy at a slightly high­
e r rate of vehicl e deceleration than if the safe­
ty belt is not being used. Therefore, in a par­
ticular co llision, it is poss ible th at an a irbag
will not deploy at a seating position where the
safety be lt is bei ng used but will inflate at the
position whe re the safety belt is not being
used. It is important that nothing interfere
with the safety belt buckles so t hat the sen­
sors can send the correct information about
safety belt use to the electron ic cont rol unit.
A WARNING
Cha nging the vehicle's s uspension inclu d­
ing use of u napproved t ire-rim comb ina­
ti ons can change Advan ced A irb ag pe r­
formance and incre ase the risk of ser io us
personal in jury in a crash.
- Never ins tall suspe nsion compone nts
t h at d o not h ave the same per forman ce
characteristics as the components origi ­
nally installed on you r vehicle .
- Never use t ire-r im combinat ions that
have not bee n approved by A udi.
A irba g sy stem 13 7
A WARNING
Items stored between the safety be lt
buckle and the center console can cause
the sensors in the b uckle to send the
wrong informa tion to the e lectronic con­
trol module a nd prevent t he A dvan ced Air­
bag System from wo rking properly.
- Always ma ke sure t ha t nothing can inter­
fe re wi th the safety belt buckles and that
t hey are not obs truc te d .
Side airbags
Description of side airbags
The airbag system can provide supplemental
protection to properly restrained occupants.
Fi g. 135 Side a irbag location in t he drive r's seat
The side airbags are located in the sides of the
front seat backrests~
fig. 135 and the rear
back rest* facing the doors . Th ey are id entified
by the wo rd "AIRBAG".
The side airbag sy stem basically consi st s of :
-the electron ic control modu le and external
side impact sensors
- the two side airbags located in the s ides of
the front backrests
- two rear side airbags (as an ordered
option)
- t he airbag warn ing light in the ins trument
cl uste r.
T he airbag system is mo nitored e lec tronically
t o m ake ce rtain tha t it is fu nction ing p ro perl y
at all times . Each time you turn on the ig ni­
tion, the airbag system indicator light will
come on for a few seconds (self diagnostics) . ..,.

138 Airbag sys te m
The side airbag system supplements the safe­
ty belts and can help to reduce the risk of in­
jury to the driver's, front and rear* passeng­
er's upper torso and head on the side of the
vehicle that is struck in a side collision. The
a irbag dep loys only in side impacts and only
when the vehicle acceleration registered by
the contro l unit is high enough. If th is rate is
below the refe rence value p rogrammed into
the contro l unit, the side airbags will not be
tr iggered, 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 will cover every possible angle of impact,
since the c ircumstances will vary considerab ly
between one collision and another. Important
factors include, fo r example, the nature (hard
or soft) of the impacting object, the angle of
impact, veh icle speed, etc.
q page 139, Im­
portant safety instructions on the side airbag
system.
As ide from the ir normal safety function, safe­
ty belts work to he lp keep the driver or front
passenger in position in the event of a side
coll is ion so that the side a irbags can provide
p rotection.
The airbag system is
not a substitute for your
safety belt. Rathe r, it is pa rt of the overall oc­
cupant res traint system in your ve hicle. Al­
ways remember that the side airbag system
can only help to protect you if you are wearing
your safety be lt and wearing it properly. This
is another reason why you sho uld always wear
your safety belts, not just because the law re­
qu ires you to do so
<=')page 113, General
notes.
It is important to remember that while the
supp lemental s ide a irbag system is designed
to reduce the like lihood of serious injur ies,
other i njuries, for example, swell ing, bruising,
and minor abras ions can also be associated
with deployed side a irbags. Remember too,
side a irbags wi ll deploy on ly once and on ly in
cer tain k inds of ac cidents -yo ur sa fety belts
are a lways there to offer protection .
Vehicle damage, repa ir costs or even the lack
of vehicle damage a re not necessar ily an ind i- cation o
f over -sensitive or failed airbag activa­
tion . In
some collisions, both front and side
airbags may inflate . Remember too, that air ­
bags will deploy only once and only in certain
k inds of collisions -your safety belts are al­
ways there to offer protection in those acc i­
dents in which a irbags are not supposed to
deploy or when they have a lready deployed .
The side airbag system will not deploy:
-when the ignit ion is turned off
- in side co llisions when the acceleration
measured by the sensor is too low
- in front -end collisions
- in rear -end co llisions
- in rollove rs.
In some types of accidents the front airbags,
s ide curtain airbags and s ide a irbags may be
t rigge red togethe r.
&, WARNING
- Safety belts and the air bag system will
only provide pro tection when occupants
are in the proper seating posi tion
¢page 139.
- If the airbag ind icator light comes on
when the vehicle is being used, have the
system inspected immediately by you r
author ized Audi dealer. The airbag may
not work properly when the vehicle ac­
celeration in a side coll is ion is high
enough to activate the a irbag.
-

140 Airbag system
-Objects between you and the airbag can
increase the risk of injury in an accident
by interfering with the way the airbag
unfolds or by being pushed into you as
the airbag inflates .
- Never place or attach accessories or
other objects (such as cup holders, tel ­
ephone brackets, or even large, bulky
objects) on the doors, over or near the
area marked "AIRBAG" on the seat backrests.
- Such objects and accessories can be­
come dangerous projectiles and cause
injury when the supplemental side air­
bag deploys.
- Never carry any objects or pets in the
deployment space between them and
the airbags or allow children or other
passengers to travel in this position .
- Always use the built-in coat hooks only
for lightweight clothing . Never leave any
heavy or sharp-edged objects in the
pockets that may interfere with side air­
bag dep loyment and can cause personal
injury in an accident .
- Always prevent the side airbags from be­
ing damaged by heavy objects knocking
against or hitting the sides of the seat ­
backs.
- The airbag system can only be triggered
once. If the airbag has been triggered,
the system must be replaced by an au­
thorized Audi dealership.
- Damage (cracks, deep scratches etc .) to
the original seat covers or to the seam in
the area of the side airbag module must always be repaired immediately by an au­
thorized Audi dealer .
- If children are seated improperly, their
risk of injury increases in the case of an
accident
q page 143, Child Safety .
- Never attempt to modify any compo­
nents of the airbag system in any way .
- In a side collision, side airbags will not
function properly if sensors cannot cor­
rectly measure increasing air pressure in­
side the doors when air escapes through larger, unclosed openings in the door
panel.
- Never drive with interior door trim pan­
els removed.
- Never drive when parts have been re­
moved from the inside door panel and
the openings they leave have not been
properly closed.
- Never drive when loudspeakers in the
doors have been removed unless the
speaker holes have been properly
closed.
- Always make certain that openings are
covered or filled if additiona l speakers
or other equipment is installed in the inside door panels.
- Always have work on the doors done by
an authorized Audi dea ler or qualified
workshop.
Side curtain airbags
Description of curtain airbags
The curtain airbags can provide supplemental
protection to properly restrained occupants .
Fig. 137 Cur tain airbag , drive r's sid e: s ide cu rtain a ir­
bag locat ion
The side curtain airbags are located on both
sides of the interior above the front and rear
side windows
c;, fig. 137 . T hey are identified
by the word "AIRBAG " on the windshield
frame and the center roof pillar .
The side curtain airbag system supplements
the safety belts and can help to reduce the risk of injury for occupants' heads and upper
torso on the side of the vehicle that is struck
liJI,

in a side collision. The side curtain ai rbag in ­
f lates in side impacts and on ly when the vehi­
cle acce lerat ion reg istered by the contro l unit
is high enough. If th is rate is be low the refer ­
ence value programmed into the control un it,
the side airbags will not be triggered, even
though the car may be badly damaged as a re­ sult of the collision . It is not possible to de­
f ine an a irbag tr igger ing range that will cover
every possible angle of impac t, since the ci r­
cumstances wi ll vary conside rably between
one co llision and another . Important factors
include, for examp le, the nat ure ( hard o r soft)
of the impacting object, the ang le of impact,
veh icle speed, etc.
c:> page 141.
Aside from the ir normal safety function , safe ­
ty belts work to he lp keep the driver or front
passenger in posit ion in the event of a co lli­
sion so that the side curtain airbags can pro­
vide protection.
The airbag system is not a s ubstitute for yo ur
safety belt. Rather, it is part of the overall oc­
cupant restraint system in your vehicle. Al­
ways remember that the airbag system can
only help to protect you if you are wearing
your safety belt and wear ing it prope rly. Thi s
i s another reason why you sho uld always wear
your safety bel ts, not just beca use the law re­
q uir es you to do so
<=:>page 113, General
notes.
It
is important to rememb er that while the
side curta in a irbag sys tem is designed to he lp
r educe the like lihood of se rious injur ies, other
in ju ries, for example, swell ing, bruising, and
minor abrasions can a lso be associated with
these airbags upon deployment. Remember
too, these a irbags w ill dep loy on ly once and
only in certain kinds of accide nts - your safety
be lts are a lways there to offer protection .
The side curtain airbag sy stem ba sically
consi sts of:
- The electronic control mod ule and external
s ide impact sensors
- The side curtain airbags ab ove the front and
rear side w indows
A irba g sy stem 141
- The a irbag indicator light in the instrument
pane l
T he airbag system is mon itored e lec troni cally
to make ce rtain i t is func tioning prope rly at all
times . Each time you turn on the ignit ion, the
airbag system indicator light will come on for
a few seconds (self diagnostics).
The side curtain airbag is not activated :
-if the ignition is turned off ,
- in side co llisions whe n the accele ration
meas ured by the sensor is too low,
- in rea r-end collisions,
- in rollovers.
A WARNING
- Safety belts and the airbag system will
only provide protection w hen occupants
a re in the proper seating posi tion
c:> page 61, General re commendation s.
- If th e air bag ind icator lig ht comes on
when the vehicle is being used, h ave the
sys tem inspected immedi ately by your
author ized A udi dealer. The s ide cur tain
airbag may not wo rk proper ly even w hen
the vehicle acce lerat ion in a side collision
is high enoug h to activate the airbag.
How side curtain airbags work
Side curtain airbags ca n work together with
side airbags to help reduce the risk of head
and upper torso injuries for occupants who
are properly restrained.
Fi g. 13 8 Illust rat io n o f pri nc iple: I nflated s ide c urtai n
a irbags o n the le ft sid e
The side c urtai n airbags inflate betwee n the
occupant and the windows on the s ide of the ..,.

144 Child Safety
-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 in 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 air­
bag system inspected immediately by
your authorized 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.
- Always follow the manufacturer's in­
structions provided with the child safety
seat or carrier.
- 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 child restraint. The backrest must be adjusted to an upright position .
- Always make sure that the
PASSENGER
AIR BAG OFF
light comes on and stays
on all the time whenever the ignition is
switched on.
(D Tips
Always replace child restraints that were
installed in a vehicle during a crash. Dam­
age to a child restraint that is not visible
could cause it to fail in another collision
situation.
Advanced front airbag system and children
Your vehicle is equipped with an "Advanced
Airbag System" in compliance with United
States Federal Motor Vehicle Safety Standard (FMVSS) 208 as applicable at the time your
vehicle was manufactured.
The Advanced Airbag system in your vehicle
has been certified to meet the "low-risk" re­
quirements for 3- and 6-year old children on
the passenger side and small adults on the driver side. The low risk deployment criteria
are intended to reduce the risk of injury
through interaction with the airbag that can
occur, for example, by being too close to the
steering wheel and instrument panel when
the airbag inflates . In addition, the system
has been certified to comply with the "sup­
pression" requirements of the Safety Stand­
ard, to turn off the front airbag for infants up
to 12 months who are restrained on the front
passenger seat in child restraints that are list­
ed in the Standard.
Even though your vehicle is equipped with an
Advanced Airbag system , all children, espe­
cially those 12 years and younger, should al­
ways ride in the back seat properly restrained
for their age and size. The airbag on the pas­
senger side makes the front seat a potentially dangerous place for a child to ride . The front
seat is not the safest place for a child in a for­
ward-facing child safety seat. It can be a very
dangerous place for an infant or a larger child
in a rearward-facing seat .
Advanced Airbags and the weight­
sensing mat in the front seat
The Advanced Airbag System in your vehicle
detects the presence of an infant or child in a
child restraint on the front passenger seat us­
ing the weight-sensing mat in the seat cush ­
ion and the sensor below the safety belt latch
on the front passenger seat that measures the
tension on the safety belt.
The weight -sensing mat measures total
weight of the child and the child safety seat
and a child blanket on the front passenger
seat. The weight on the front passenger seat
is related to the design of the child restraint
and its "footprint", the size and shape of the
bottom of the child restraint as it sits on the .,..

seat. The weight of a child restraint and its
"footprint" vary for different kinds of child re­
straints and for the different models of the
same kind of child restraint offered by child restra int manufacturers.
The weight ranges for the individual types, makes and mode ls of ch ild restra ints that the
NHTSA has specified in the Safety Standard
together with the we ight ranges of typical in­
fants and typical 1 year -old child have been
stored in the control unit of the Advanced A ir­
bag System . When a chi ld restraint is being
used on the front passenge r seat with a typi­
cal 1 year -old ch ild, the A dvanced Airbag Sys­
tem compares the we ight measured by the
weight sensing mat with the information stor­
ed in the electronic control unit.
The electron ic contro l unit al so registers the
tension on the front passenger safety be lt.
The tension on the safety be lt for the front
passenger seat will be different for an adult
who is properly using the safety belt as com­
pared to the tension on the be lt when it is
used to attach a child restraint to the seat.
T he sensor below the latch for the safety belt
for the front seat passenger measures the
tension on the belt . T he input from this sen­
sor is t hen used w ith the we ight to "decide",
whether there is a ch ild restraint with a typ ica l
1 year-o ld child on the front passenger seat
and whether or not the airbag must be turned
off .
Child restraints and Advanced Airbags
Regard less of the child restraint that you use,
make sure that it has been certified to meet
United States Federal Motor Vehicle Safety
Standards and has been certified by its manu­
facturer for use with an airbag . Always be sure
that the chi ld restraint is p roperly instal led at
one of the rear seat ing pos itions . If in excep­
tional ci rcumstances you must use it on the
front passenger seat, carefu lly read all of the
information on child safety and Advanced Air­
bags and heed a ll of the app licable WARN­
INGS. Make certain that the child restraint is
correctly recognized by the weight-sensing
Child Sa fet y 145
mat inside the front passenger seat, that the
front passenger airbag is turned off and that
the a irbag status is always correct ly signaled
by the
PAS SENGE R AIR BAG OFF light.
Many types and models of child restraints
have been available over t he years, new mod­
els are introduced regu larly incorporating new
and improved des igns and o lder models are
taken out of product ion. Ch ild restraints are
not standard ized . Child restraints of the same
type typ ically have d ifferent weights and sizes
and different 'footpr ints,' the size and shape
of the bottom of the ch ild restrai nt that sits
o n the seat, when they a re insta lled on a veh i­
cle seat. These diffe rences make it v irtually
impossible to certify compliance with the re­
quirements for advanced airbags with each
and every ch ild restraint that has ever been
sold in the past or will be sold over the course
of the useful life of your veh icle.
For this reason, the United States National
Highway Traffic Safety Adm inistrat ion has
published a list of spec ific type, makes and
models of child restraints that must be used
to certify comp liance of the Advanced Airbag
System in your veh icle with the suppression
requirements of Federal Motor Vehicle Safety
Standa rd 208. These chi ld restraints are :
Subpart A - Car bed child restraints
Model
Angel Guard Angel Ride AA 2403FOF
Manufactured on or
after
September 25, 2007
Subpart B - Rear-facing child restraints
Model Manufactured on or
after
Century SmartF it December 1, 1999
4543
Cosco Arriva September 25, 2007
22-013PAW and base
22-999WHO
Evenf lo Discovery Ad- December 1, 1999
just Right 212
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Energy management
Starting ability is optimized
Energy management controls the distribution
of electrical energy and thus optimizes the
availability of electrical energy for starting the engine .
If a vehicle with a conventional energy system
is not driven for a long period of time , the bat­
tery is discharged by idling current consumers
(e.g. immobilizer). In ce rtain c ircumstances it
can result in there being insuff icient ene rgy
avai lab le to start the engine .
Intell igent energy management in your vehi­
cle hand les the d istribution of electrical ener­
gy. Starting ab il ity is markedly improved and
the life of the battery is extended.
Basically, energy management consists of
batt ery di agno sis, idlin g current man ag e­
m ent
and dyn ami c en ergy m anage ment .
Batter y diagnosis
Battery diagnosis continuously determines
the state of the battery . Sensors determ ine
battery vo ltage, battery current and battery
temperature. This dete rm ines the current
state of charge and the powe r of the battery.
Idling curr ent man agement
Idling current management reduces ene rgy
consumption while the vehicle is stand ing .
W ith the ignition switched off, it cont ro ls the
energy supply to the va rious electr ical compo ­
nents . Data from battery diagnosis is consid­
ered.
Depending on the battery's state of charge,
i nd ividua l consumers are gradual ly t urned off
to prevent excess ive d ischarge of the bat tery
and thus maintain starting capability .
Dynamic en ergy management
While the vehicle is being driven, dynamic en­
e rgy management dist ributes the energy gen­
e rated according to the needs of the individu­
a l components.
It reg ulates cons umption, so
that more electrical energy is not being used
Int ellig ent technolog y 167
than is being generated and ensures an opti ­
mal state of charge for the battery.
(0 Tips
- But even energy management canno t
negate the limits of physics . Consider
that the power and life of a battery are
limited .
- If starting ability is threatened, you are
informed by a warning
r:!) page 168,
Driver notification in the instrument
cluster display.
What you should know
The highest priority is given to maintaining
starting capability.
The battery is severe ly taxed in short -distance
driving, in city traffic and during the cold time
of year. Abundant electrical energy is re­ quired, but only a little is generated .
It is also
critical if the engine is not running and electri­
cal components are turned on . In this in­
stance energy is be ing consumed but none is
being generated.
It is in precisely these situations that you will
notice energy management actively regulat ­
ing the d istribution of energy .
Vehicle stands for an e xtended peri od
If you do not drive your vehicle over a period
of several days or weeks, e lectr ical compo­
nents are gradually cut back or switched off.
This reduces energy consumption and ma in ­
ta ins start ing capability over a longer period .
Take into considerat ion that when you unlock
your vehicle, some convenience functions, such as the remote key or power seat adjust­
ment, may not be available . The conven ience
funct ions w ill be available again when you
tu rn on the ignition and start the engine .
With the engine turned off
If you listen to the radio, for example, w ith
the engine turned off, the battery is being d is-
charged.
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