2012 AUDI A3 ignition

124 Airbag system
Even though your vehicle is equipped with an
Advanced Airbag System, make certain that
all chi ldren, especially those 12 years and
younger, a lways ride in the back seat properly
restrained for their age and size. The airbag
on the passenger side makes the front seat a potentially dangerous place for a ch ild to ride.
The front seat is not the safest place for a
child in a forward-facing child safety seat. It
can be a very dangerous place for an infant or
a child in a rearward-facing seat.
The Advanced Airbag System in your veh icle
has been certified to comply with the require­
ments of United States Federal Motor Vehicle
Safety Standard 208 as applicable at the time
your vehicle was manufactured.
The Standard requires the front a irbag on the
passenger side to be turned off ("sup­
pressed") if a child up to about one year of
age restrained in one of the rear-facing or for­
ward -facing infant restraints listed in Federal
Motor Vehicle Safety Standard 208 with which
the Advanced Airbag System in your vehicle
was certified has been installed on the front passenger seat . For a listing of the child re ­
strai nts that we re used to certify compliance
with the US Safety Standard
r=v page 145.
The PASSENGER AIR BAG OFF light in the in­
strument panel te lls you when the front Ad­
vanced A irbag on the passenger side has been
turned off by the e lectronic control unit.
Each t ime you turn on the ignition, the
PAS ­
SENGER AIR BAG OFF
light will come on 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 child restraint on the front passenger seat,
- wi ll go off if the front passenger seat is oc ­
cupied by an adult as registered by the
weight-sensing mat
r=v page 133, Monitor­
ing the Advanced Airbag System .
The PASSENGER AIR BAG OFF light comes on
when the control un it detects a total weight
on the front passenger seat that requires the
front airbag to be turned off.
If the total weight on the front passenge r
seat is more than that of a typica l 1 year -old
chi ld but less than the weight of a small
adult, the front airbag on the passenger side
can deploy (the
PASSENGER AIR BAG OFF
light does not come on). If the PASSENGER
AIR BAG OFF
light does not come on, the
front airbag on the passenger side has not
been turned off by the electronic con trol unit
and can deploy if the control unit senses an
impact that meets the cond itions stored in its
memory .
For example, the airbag may deploy if:
-a small ch ild that is heav ier than a typical 1
year-old ch ild is on the front passenger seat
( re gard less of whether the child is in one of
the child safety seats listed
r=v page 145), or
- a child who has outgrown ch ild restraints is
on the front passenger seat.
If the front passenger airbag is turned off, the
PASSENGER AIR BAG OFF light comes on in
the instrument cluster and stays on.
The front airbag on the passenger s ide may
not deploy (the PASSENGER AIR BAG OFF
light does not illum inate and stay lit) even if a
small adult or teenager, or 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
r=v page 104, Proper seating
position for the driver.
If the front passenger airbag deploys, the
Federal Standard requires the airbag to meet
the "low risk" deployment criteria to reduce
the risk of injury t hroug h interaction with the
airbag. "Low risk" deployment occurs in those
crashes that take place at lower dece lerat ions
as defined in the electronic control unit
r=v page 133, PASSENGER AIR BAG OFF light .
Always remember, a child safety seat or infant
carr ier installed on the front seat may be
struck and knocked out of posit ion by the rap­
idly inflat ing passenger's airbag in a frontal
collision . The air bag could greatly reduce the
effectiveness of the ch ild restraint and even
seriously injure the child during inflation .

For this reason, and because the back seat is
the safest place for children - when properly restrained according to their age and size - we
strongly recommend that children always sit in the back seat
Q page 143, Child Safety.
A WARNING
-
A child in a rearward-facing child safety seat installed on the front passenger seat
w ill be seriously injured and can be k illed if
the front a irbag inflates - even with an Ad­
vanced Airbag System.
- T he inflating a irbag w ill hit the child
safety seat or infant carrier with great
force and w ill smash the ch ild safety sea t
and child against the backrest, cente r
armrest, 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 circumstan­
ces and the
PASSENGER AIR BAG OFF
light does not come on and stay on , im­
med iately install the rear-facing child
safety seat in a rear seating posit ion and
have the a irbag system inspected by your
authorized Aud i dealer .
- Forward-fac ing ch ild safety seats instal­
led on the front passenger's seat may in­
terfe re with the deployment of the air­
bag and cause se rious personal injury to
the ch ild.
A WARNING
If, in exceptional c irc umstances, you mus t
install a forwa rd-facing child restra int on
the front passenger's seat:
- Alw ays make sure the forw ard-fac ing
seat has been des igned and certified by
its manufacturer for use on a front seat
with a passenger front and side airbag.
- Never put the forward -facing child re ­
straint up aga inst or very near the instru­
ment pane l.
- Always move the passenger seat into its
rearmost position in the seat's fore and
A irbag system 12 5
aft adjustment range, as far away from
the airbag as possible before installing
the forward-fac ing ch ild restraint. The
backrest must be adj usted to an upright
position .
- Make sure that the
PASSENGER AIR BAG
OFF
li ght comes on and stays on all the
time wheneve r the ignit ion is switched
on.
A WARNING
To reduce the risk of ser ious injury, make
su re that the
PASSENGER AIR BAG OFF
light w ill be displayed whenever a child re­
straint is installed on the front passenger
seat and the ignition is switched on.
- If the
PASSENGER AIR BAG OFF light
does not s tay on, per form the checks de ­
scribed
Q page 133, Monitoring the Ad ­
vanced Airbag System.
- Take the chi ld restraint off the front pas­
senger seat and install it properly at one
of the rear seat positions if the
PASSEN ­
GER AIR BAG Off light does not stay on.
- Have the airbag system inspected by
your author ized Audi dealer immed iate­
ly .
-Always carefu lly follow instr uctions from
child restraint manufacturers when in­
stall ing ch ild restra ints .
A WARNING
If, in except iona l circumstances, you must
install a forward or rearward-facing child
restra int on the front passenger's seat :
- Improper instal lation of ch ild restraints
can reduce their effect iveness o r even
prevent them from providing any protec­
tion.
- An improper ly installed ch ild restra int
can interfere with the a irbag as it de­
ploys and seriously i njure o r even kill the
child -even with an Adv ance d Airbag
System.
- Always carefu lly follow the manu factur­
er 's ins truc tions p rov ided with the ch ild
safety seat or car rier . •
•

the forward-facing child restraint. The backrest must be adjusted to an upr ight
posit ion.
- Make sure that the
PASSENG ER AI R BA G
OFF
light comes on and stays on all the
t ime whenever the ignition is switched
on.
Advanced Airbag System components
The front passenger seat in your vehicle has a
l ot of very important parts of the Advanced
Airbag System in it. These parts include the
weight-sens ing ma t, sensors, wiring, brack­
ets, and mo re. The function of the system in
the front passenger seat is checked by the
e lectronic control unit when the ignition is on .
The control unit monitors the Advanced Air­ bag System and turns the airbag indicator
light on when a malfunction in the system
components is detected. The function of the
airbag ind icator light is described in greater
deta il below. Because the front passenger
seat contains impo rtant parts of the Ad­
vanced A irbag System, you m ust take care to
p revent 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 Advanc ed Airbag Syst em
con sis ts o f th e following :
-Crash sensors in the front of the vehicle that
measure vehicle acceleration/deceleration
to provide information to the Advanced Air­ bag System about the severity of the crash.
-An electronic control unit, with integrated
crash sensors for front and side impacts .
The cont ro l unit "decides" whether to fire
the front airbags based on the information r eceived from the c rash sensors. The control
unit a lso "dec ides" whet her the safety be lt
pretensione rs should be activated.
- An Advanced Airbag with gas generator for
the d river ins ide the steer ing whee l hub.
- An Advanced Airbag with gas generator in­
s ide t he instr ument pane l for the front pas­
senger.
A irbag system 129
- A weight-sensing mat under the upho lstery
padding of the front passenger seat cushion
that measures the total weight on the seat .
The informat ion reg istered is sent continu­
ously to the electron ic control unit to regu­
late deployment of the front Advanced Air­
bag on the passenger side.
- An airbag monitoring system and ind icator
light in the instrument cluster
¢page 133.
-The PASSENGER AIR BAG OFF light comes
on and stays on in the center of the instru­
ment panel
c:::> page 133, fig . 134 and tells
you when the front Advanced Airbag on the passe nger side has been tu rned off.
- A senso r below the safety belt latch fo r the
front seat passenger to measure the tension
on the safety be lt. T he ten sion on the safety
be lt and the weight regis tered by the
weight -sensing mat he lp the control unit
"decide" whether the front airbag fo r the
front passenger seat should be turned off or not
¢ page 123, Child restraints on the
front seat -some important things to
know.
-A sensor in the safety belt latch for the driv­
er and for the front seat passenger that
senses whether that safety belt is latched or
not and transmits this information to the
electronic contro l un it .
A WARNING
D amage to the front passenger seat can
p revent the front airbag from wor king
properly.
- Imp roper repai r or d isassembly of the
fr on t passenge r and dr iver seat will pre­
vent the Advanced Airbag System from
functioning p roperly.
- Repairs to the front passenger seat must
be pe rformed by qualified and p roperly
trained workshop personne l.
- Never remove the front passenger or driver seat from the vehicle .
- Never remove the upho lstery from the
front passenger seat .
- Never disassemble or remove p arts from
-
the sea t or disconnect wires from it. ..,.
•
•

¢ page 123, Child restraints on the front seat
- some important things to know .
A WARNING
To reduce the risk of injury when an airbag
inflates, always wear safety belts properly.
- If you are unrestrained, lean ing forward,
sitting sideways or out of position in any
way, your risk of injury is much higher.
- You w ill also receive serious injuries and
cou ld even be killed if you are up against
the a irbag or too close to it when it in­
flates - even with an Advanced Airbag
~ page 122.
More important things to know about
front airbags
F ig. 133 Inflated front a irbags
Safety belts are important to help keep front
seat occupants in the proper seated pos ition
so that airbags can unfold properly and pro­
vide supp lemental protection in a fronta l co l­
lision .
The front a irbags are designed to provide ad­
d itiona l protection for the chest and face of
the dr iver and the front seat passenger when :
- safety belts are worn properly,
- the seats have been positioned so that the occupant is properly seated as far as possi­
ble from the a irbag,
- and the head restraints have been proper ly
adjusted .
Because airbags i nflate in the blink of an eye
with great force, things you have on your lap or have placed on the seat could become dan­
gerous projectiles, and be pushed into you if
the airbag inflates.
A irba g sy stem 131
When an airbag deploys, fine dust is re leased.
This is norma l and is not caused by a fire in
the vehicle . This dust is made up mostly of a
powder used to lubricate the airbags as they
deploy. It could irritate skin .
It is important to remember that whi le the
supplementa l airbag system is designed to re­
duce the like lihood of serious injuries, other
injur ies, for example swelling, bruising and
minor abras ions, can also happen when air­
bags i nflate. A irbags do not protect the arms
or the lower parts of the body . Front a irbags
supplement the th ree -po in t safety belts only
in some fronta l co llisions in which the vehicle
deceleration is high enough to deploy the air­
bags .
Front airbags will not deploy :
-if the ignition is sw itched off when a crash
o ccu rs,
- in side co llisions,
- in rear-end collisions,
- in rollovers,
- when the crash dece leration measured by
the airbag system is less than the minimum
threshold needed for a irbag deployment as
reg istered by the electron ic contro l unit .
The f ront pa ssen ger airbag als o will no t
deplo y:
- when the front passenger seat is not occu­
pied,
- when the weight on the front passenger
seat as sensed by the Advanced Airbag Sys­
tem ind icates that the front a irbag on the
passenger side has to be tu rned off by the
electronic contro l un it (the
PASSENGER AIR
BA G OFF
light comes on and stays o n).
.&, WARNING
Sitting in t he wrong pos ition can increase
the risk of serious injury in crashes.
- T o reduce the risk of injury when the air­
bags inflate, the driver and passenge rs
m ust always s it in an upright position,
m ust not lean against or place any part

Monitoring the
Advanced Airbag
System
I Airbag monitoring indicator light
Two separate indicators monitor the function
of the Advanced Airbag System: the airbag
monitoring indicator light and the
PAS SEN ­
GER AIR BAG OFF
light.
The Advanced Airbag System (including the
e lectronic control unit, sensor circuits and sys­
tem wiring) is monitored continuously to
make sure that it is functioning properly
whenever the ignit ion is on . Each t ime you
turn on the ignition, the airbag monitor ing in­
d icator light
I will come on for a few seconds
(self diagnostics) .
t!i The syste m mus t be insp ected when the
indicato r light:
- does not come on when the ignit ion is
switched on,
- does not go out a few seconds after yo u
have switched on the ignition, o r
- comes on while d riving .
If an airbag system malfunction is detected,
the
I indicator light will first start flashing to
catch the driver's attention and then stay on
continuously to serve as a constant reminder
to have the system inspected immediately.
If a malfunction occurs that turns the front
a irbag on the passenger side off, the
PASSEN­
GER AIR BA G OFF
light will come on and stay
on whenever the ignition is on.
_& WARNING
An airbag system that is not funct ioning
properly cannot provide supp lemen tal p ro­
tection in a frontal crash.
- If the airbag indicator l igh t comes on, it
means that there may be something
wrong wit h the Advanced Airbag System.
It is possible that the airbag will inflate
when it is not s upposed to, or wi ll not in­
flate when it should.
-
Airba g sy stem 133
-Have the airbag system inspected imme­
diate ly by you r authorized Aud i dea ler.
PASSENGER AIR BAG OFF light
F ig . 1 34 Sect ion from th e ce nter console: PASSENGER
AIR BAG O FF light
The PAS SENGER AIR BAG OFF light is located
in the center console
c::> fig. 134.
The PA SSENGER AIR BAG OFF light will come
on and stay on to tell you when the front Ad­
vanced Airbag on the passenger side has been
turned off by the electron ic control unit. Each
time you turn on the ignit ion, the
PAS SEN­
GER A IR BAG OFF
light will flash for a few
seco nds and:
- will stay on if the front passenger seat is not
occupied,
- will stay on if there is a small ch ild or child
restraint on the front passenger seat,
- will go out if the front passenger seat is oc­
cupied by an adult as registered by the
weight-sensi ng mat.
The
PA SSENGER AIR BAG OFF light must
come on and st ay on
if the ignition is on and
- a car bed has been installed on the front
seat, or
- a rearward -facing child restraint has been
installed on the front passenger seat, or
- a forward -facing chi ld restraint has been in­
stalled on the front passenger seat, or
- t he weight reg iste red on the fron t passen-
ger seat is equal to or less than the com -
bined weight of a typical 1 year-old restrain­
ed in one of the rear-facing or forward -fac-
ing infant restraints listed in Federal Motor
Vehicle Safety Standard 208 with which the ..,_

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

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 .,..