2012 AUDI A8 warning light

152 Airbag sys te m
electronic contro l uni t (the PAS SENGER AIR
BAG OFF
light comes on and stays on) .
A WARNING
Sitting in the wrong position can increase
the risk of serious injury in crashes.
- To reduce the risk of injury when the air­
bags inflate, the driver and passengers
must always sit in an upright position,
must not lean against or place any part
of the ir body too close to the area where
the a irbags are located .
- Occupants who are unbelted, out of posi ­
t ion or too close to the airbag can be se­
riously injured by an airbag as it unfolds
with great force in the blink of an eye
<=?page 144.
A WARNING
-
A child in a rearward -facing child sea t in­
stalled on the front passenger seat will be
seriously injured and can be killed if the
front airbag inflates -even with an Ad­
vanced Airbag System.
-The inflating ai rbag will hit the child seat
or infant carrier with great force and will
smash the ch ild seat and child against
the backrest , center armrest, door or
roof .
- Always install rear-facing child seats on
the rear seat.
- If you must install a rearward facing child seat on the front passenger seat
because of except iona l circumstances
and the
PASSENGER AIR BAG OFF light
does not come on and stay on, immedi­
ately i nstall the rea r-facing chi ld seat in a
rear seating position and have the ai rbag
system inspected by your Au di dealer.
A WARNING
Objects be tween you and the a irbag will
increase the risk of in jury in a c rash by in ­
terfering with the way the airbag unfolds
or by being pushed into yo u as the a irbag
inf lates. -
Never hold things in you r hands o r on
your lap when the veh icle is in use.
- Never transpo rt items on or in t he a rea
of the front passenger seat. Objects
could move into the area of the front air­
bags during braking or other sudden ma­
neuvers and become dangero us projec ­
tiles that can cause ser ious personal in­
jury if the a irbags inf late .
- Never p lace or attach accesso ries o r oth ­
er objects (such as cup hold ers, te le­
phone b ra ck ets, large, heavy or bulky ob­
jects) on the doors, ove r o r ne ar the are a
marked "AIRBAG" on the s teer ing whee l,
instr ument panel, sea t bac krests o r be ­
tween those areas and yourself. These
objects could ca use in jury in a crash, es­
pecially when the airbags inflate.
- Never recline the front passenger 's seat
to transport objects. Items can a lso
move into the area of the s ide airbag or
the front a irbag during braki ng or in a
sudden maneuve r. Objects near the air­
bags can become projectiles and cause
in jur y, partic ularly when the seat is re­
clined.
A WARNING
The fine dus t create d when air bags deploy
c a n cause breathing p rob lems fo r people
wi th a history of as thma or other breath ­
i ng cond itions.
- T o reduce the risk of breath ing pro blems,
those with asthma or other respiratory
conditions s hou ld get fresh air right
away by getting o ut o f the veh icle or
open ing windows or doors .
- If you are in a collision in which airbags
deploy, wash your hands and face with
mild soap and water before eating.
- Be careful not to get the dust into your
eyes, or into any c uts or scratches.
- If the res id ue should get into your eyes,
f lush them w ith water.

Monitoring the
Advanced Airbag
System
I ( USA models) /!{ (Canada models )
Airbag monitoring indicator light
Two separate indicators monitor the function
of the Advanced Airbag System: the airbag
monitoring indicator light and the
PASSEN­
GER AIR BAG
OFF light.
The Advanced Airbag System (including the
electronic 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 time you
switch on the ignition, the airbag monitoring
indicator light
m (USA mode ls)/ m (Canada
models) will come on for a few seconds (self
diagnostics).
The system must be inspected when the indicator light
(I (USA models);Ei
(Canada models):
-does not come on when the ignition is
switched on ,
- does not go out a few seconds after you
have switched on the ignition, or
- comes on while driving.
If an airbag system malfun ction is detected,
the 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 mal function occurs that turns the front
airbag on the passenger side
off, the PASSEN­
GER AIR BAG
OFF light will come on and stay
on whenever the ignition is on.
A WARNING
An airbag system that is not funct ioning
properly cannot provide supplemental pro­
tection in a frontal crash.
- If the airbag indicator light comes on, it
means that there may be something
wrong with the Advanced Airbag System .
It is possible that the airbag will inflate
Airbag system 153
when it is not supposed to, or will not in­
flate when it sho uld.
- Have the airbag system inspected imme­
diate ly by your Audi dealer.
PASSENGER AIR BAG OFF light
Fig . 148 Sect ion from t he instru ment panel: PASSEN ­
GER AIR BAG OFF light
The PASSENGER AIR BAG OFF light is located
in the center of the instrument panel
<=>fig . 148 .
The PASSENGER AIR BAG OFF light wi ll come
on and stay on to tell you when the front Ad­
vanced Airbag on the passenger s ide has been
turned
off by the electron ic control unit . Each
time you sw itch on the ign ition, the
PASSEN­
GER AIR BAG
OFF light will 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 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-sensing mat.
The
PASSENGER AIR BAG OFF light must
come on and stay 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
- the weight reg istered on the front passen­
ger seat is equal to or less than the com -
bined weight of a typical 1 year-o ld
llJl>

the message PASS ENGER AIR B AG OFF or
PA SSENGER AIR BA G ON will briefly appear
in the instrument cluster display. Th is is to in ­
form the driver of the current front passenger airbag status .
Important safety instructions on
monitoring the Advanced Airbag System
A WARNING
An airbag system that is not functioning
properly cannot provide supplemental pro­
tection in a frontal crash.
- If the airbag indicator light comes on, it
means that there may be someth ing
wrong with the Advanced Airbag System.
It is possible that the airbag will inflate
when it is not supposed to, or w ill not in­
flate when it should.
- Have the airbag system inspected imme ­
diately by your Aud i dealer.
A WARNING
If the front airbag inflates, a ch ild without
a child restra int, or in a rearward-fac ing
child safety seat, or in a forward-facing
child restrain t that has not been properly
installed will be serio usly injured and can
be killed.
- Even though your veh icle is equipped
with an Advanced Airbag System, make
certain that a ll children, especially 12
years and younger, a lways ride on the
back seat properly restrained for their
age and size.
- Always install forward or rear-facing child seats on the rear seat -even w ith
an Advanced Airbag System.
- If you must install a rearward-facing
child seat on the front passenger seat
because of exceptiona l circumstances
and the
PASSENGER AIR BAG OFF light
does not appear and stay on, immediate­
ly i nstall the rea r-facing chi ld seat in a
rear seating position and have the airbag
system inspected by your Aud i dealer.
-
A irbag system 15 5
-A tight tether or other strap on a rea r­
ward-facing child restraint attached to
the front passenger seat can put too much pressure on the weight-sensing
mat in the seat and reg iste r more weight
than is actually on the seat . The heavie r
weight registered can make the system
wo rk as tho ugh an adult were on the seat
and deploy the Advanced Airbag when it
m ust be suppressed causing serious or
even fata l injury to the chi ld .
- If, in exceptiona l c ircumstances, you
m ust install a forward-facing child re­
straint on the front passenger seat, al­
ways move the seat into its rearmost po­ sition in the seat's fore and aft adjust­
ment range, as far away from the a irbag
as poss ible. The backrest must be adjust­
ed to an upright pos ition. Make su re that
the
PASSENGER AIR BAG OFF light
comes on and stays on all the time when­
ever the ignit ion is switched on.
A WARNING
-
- If the PASSENGER AIR BAG OFF light
does not go out when an ad ult is sitting
on the front passenger seat after taking
the steps described above, make sure the
adu lt is properly seated and restra ined at
one of the rear seating pos itions.
- Have the airbag system inspected by
your Aud i dealer before transporting
anyone on the front passenger seat.
(D Tips
If the weight-sensing mat in the front pas­
senger seat detects an empty seat, the
front airbag on the passenger side wi ll be
turned off, and the
PASSENGER AIR BAG
OFF
light will stay on .
Repair, care and disposal of the airbags
Parts of the airbag system are i nstalled at
many diffe rent p laces o n your Aud i. Insta lling,
removing, servicing or repa iring a part in an
area of the veh icle can damage a part of an .,..
•
•

regulations must be observed. Your au­
thorized Audi dealer is familiar with these requirements and we recommend that you
have your dealer perform this service for
you.
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, using
tire-rim combinations not approved by Audi, lower ing 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 airbag
sensors and sent to the electronic control
un it . Some suspension changes can, for exam­
ple, increase the force levels measured by the
sensors and make the airbag system deploy in
crashes in which it would not dep loy if the
changes had not been made. Other kinds of
changes may reduce the force Levels meas­
ured by the sensors and prevent the airbag
from deploying when it should.
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
latched or not. If the safety belt is being used,
the front airbag will deploy at a slightly high­
er rate of vehicle deceleration than if the safe­
ty belt is not being used. Therefore, in a par­
ticular collision, it is poss ible that an airbag
will not deploy at a seating position where the
safety belt is being used but will inflate at the
position where the safety belt is not being
used. It is important that nothing interfere
with the safety belt buckles so that the sen­
sors can send the correct information about
safety belt use to the electronic control unit.
A WARNING
Changing the vehicle's suspension includ­
ing use of unapproved tire-rim combina­
tions can change Advanced Airbag per­
formance and increase the risk of serious personal injury in a crash.
Airbag system 157
-Never install suspension components
that do not have the same performance
characteristics as the components origi­
nally installed on your vehicle .
- Never use tire-rim combinations that
have not been approved by Audi.
A 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 con­
trol module and prevent the Advanced Air­
bag System from working properly.
- Always make sure that nothing can inter­
fere with the safety belt buckles and that they are not obstructed.
Knee airbags
Description of knee airbags
The knee airbag system con provide supple­
mental protection to properly restrained
front seat occupants.
Fig. 149 Driver 's airbag
The driver knee airbag is in the instrument
panel underneath the steering wheel
¢ fig . 149, the airbag for the passenger is at
about the same height in the instrument pan­
el underneath the glove compartment.
The knee airbag offers additional protection
to the driver's and passenger's knees and up ­
per and Lower thigh areas and supplements
the protection provided by the safety belts.
If the front airbags deploy, the knee airbags
also deploy in frontal col lisions when the de­
ployment threshold stored in the control unit .,,.

158 Airbag system
is met ¢ page 151, More important things to
know about front airbags.
I n addition to their normal safety function,
safety belts he lp keep t he driver or front pas­
senger in position in a frontal coll is ion so that
the airbags can provide supplemental protec­
tion.
The airbag system is not a s ubst itute for yo ur
safety be lt . Rathe r, 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 properly. This
is why you shou ld always wear your safety
belt, not just because the law requires you to
do so
¢page 134, General notes .
The safety belt buck le for the driver and front
seat passenge r have switches that tell the air­
bag control module if the safety belt is being
used or not . If the safety belt is being used,
the knee airbag will deploy at a sligh tly higher
rate of decelera tion than if the belt is not be­
ing used . Therefore, in a par tic ul ar collision, it
is possible that an airbag will not deploy at a
seating position where the safety belt is being
used but will inflate at the pos ition where the
safety belt is not be ing used.
Remember too, airbags will deploy only once
and on ly in certain kinds of accidents -your
safety be lts are a lways there to offer protec­
tion in those accidents in which airbags are
not supposed to deploy or when they have al­
ready deployed, fo r example whe n your veh i­
cle strikes or is struck by another after the
fi rst coll is ion.
This is just one of the reasons why an a irbag is
not a substitute for the safety belt . The airbag
system works most effective ly when used with
the safety belts. Therefore, always wea r your
safe ty be lts correctly.
It is importan t to remember that while the
supplemental knee a irbag system is designed
to reduce the like lihood of serious injur ies,
o ther inj uries, fo r example, swel ling, bruising,
minor abr asions and fri ction burn s ca n also
occ ur when an a irbag inflates.
The knee airbag system basic ally consists
of:
- The e lectronic control module
- Two inflatable ai rbags (a irbag a nd gas gen -
erator), one for the driver and one for the
front passenger
- The a irbag indicator light in the instr ument
panel
The knee airbag system w ill not deploy:
- when the ig nit ion is switched off
- in frontal collisions when the deceleration
meas ured by the control unit is too low
- in side collisions
- in rear-end collisions
- in rollovers
- in the event of a system malfunction (warn-
ing/ind icator light is on)
¢ page 18.
A WARNING
--
-Safety belts and the airbag system can
only provide protection w hen occupants
are in the proper seating position
¢page 151.
-If the airbag ind icator light comes when
the vehicle is be ing used , have the sys­
tem inspected immediate ly by you r au­
thori zed A udi dealer. The airbag may not
w ork p roperly when the vehicle accele ra­
tion in a side collision is high enough to
de ploy the airbag . See also¢
page 18 .
How knee airbags work
The risk of injury to the leg area can be re ­
duced by fully inflated knee airbags.
Fi g. 1 50 In flated airbags protect ing in a frontal colli­
s io n
...

160 Airbag system
Side airbags
Description of side airbags
The airbag system can provide supplemental
protection to properly restrained occupants .
---
Fig. 151 Side a irbag locat ion in the dr iver 's seat
The s ide airbags are located in the sides of the
front sea t backrests
c::>fig. 151 and the rear
backrest facing the doors. They are identified
by the word "AIRBAG" .
Th e s ide a irbag syste m basically co nsists of:
- the electronic control module and external
s ide impact sensors
- the two side airbags located in the sides of the front backrests
- two rear side airbags
- the airbag warning light in the instrument
cluster.
The airbag system is monitored electronica lly
to make certain that it is functioning properly
at all times. Each time you switch on the igni­
tion, the airbag system indicator light will
come on for a few seconds (self diagnostics) .
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 passenger's upper torso on the side of the vehicle that is
struck in a side collision . The airbag deploys
only in side impacts and on ly when the veh icle
acceleration registered by the control unit is h igh enough . If this rate is below 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 ­
fine an airbag triggering range that will cover every possible ang
le of impact, since the cir­
cumstances will vary considerably between
one collis ion and another. Important factors
include, for example, the nature (hard or soft)
of the impacting object, the angle of impact,
vehicle speed, etc.
c::> page 161, Important
safety instructions on the side airbag system .
Aside from their normal safety function, safe­
ty belts work to help keep the driver or front
passenger in position in the event of a side
collision so that the side airbags ca n provide
protection .
The airbag system is
not a substitute for your
safety belt . Rather, it is part of the overall oc ­
cupant restra int system in your vehicle. Al­
ways remember that the side airbag system can on ly help to pro tect you if you are wearing
yo ur safety belt and wearing i t properly. This
is another reason why you should always wear
your safety belts, not just because the law re­
quires yo u to do soc::>
page 134, General
notes.
It i s important to remember that wh ile the
supplementa l side airbag system is designed
to reduce the likelihood of serious injuries,
other injuries, for example, swelling, bruis ing,
and minor abrasions can also be associated
with deployed side airbags. Remember too,
s ide airbags will dep loy only once and only in
certain kinds of accidents - your safety belts
are always there to offer protection .
Vehicle damage, repair costs or even the lack of veh icle damage are not necessarily an indi­
cat ion of ove r-sensitive or failed airbag act iva­
t ion. In some coll is ions, both front and side
airbags may inflate. Remembe r too, that air­
bags will deploy only once and on ly in certain
k inds of collisions -your safety belts are al­
ways there to offer protection in those acci­ dents in which airbags are not supposed to
deploy or when they have already deployed .
The s ide airbag sy stem will not d eplo y:
-when the ignit ion is switched off
- in side co llisions when the acceleration
measured by the se nsor is too low
- in front-end collisions

- in rear-end co llisions
- in ro llovers.
In some types of acc idents the front airbags,
side curta in a irbags and side airbags may be
tr iggered toge ther.
& WARNING
- Safe ty belts and the airbag sys tem will
only prov ide protection when occ upants
are in the p roper seating position
¢page 161.
- If the airbag indicator light comes on
when the vehicle is being used, have the
system inspected immediately by your
authorized Audi dealer. T he a irbag may
not work p roperly when the vehicle ac­
cele ration in a side co llision is high
enough to activa te the airbag.
How supplemental side airbags work
-
Side airbags deploy instantly and can help re­
duce the risk of upper torso injuries for occu­
pants who are properly restrained.
Fi g. 152 Inflated side airbags on left side of veh icle,
rear side airbag
When the system is triggered, the airbag is
f ill ed w it h propellant gas and breaks through
a seam in the seat surface area marked "AIR­
BAG" .
It expands between the side trim pa nel
and the passenger . In order to help prov ide
t his additional protection, the side a irbag
must inf late withi n a frac tion of a second at
very high speed and with grea t fo rce . The sup­
p lemental side airbag could i nju re you if your
seating position is not proper or upr ight or if
items are located in the area where the sup­
plemental side a irbag expands . Th is applies
A irba g sy stem 161
especially to children ¢ page 166, Child Safe ­
ty . Supplemental side airbags inflate between
the occ upant and the door panel on the side
of the vehicle that is struck in certain side col­
lis ion ¢ fig. 152 .
Although they are not a soft pi llow, they can
"cushion" the impact and in this way they can
help to reduce the risk of injury to the upper
part of the body.
A fine dust may deve lop when the airbag de­
ploys. T his is normal and does not mean there
is a fire in the vehicle.
Important safety instructions on the
side airbag system
Airbags are only supplemental restraints . Al­
ways properly wear safety belts and ride in a
proper seating position.
There is a lot that you and your passengers must know and act accord ingly to help the
safety belts and airbags do their job to pro ­
vide s upplementa l protect ion .
& WARNING
An in flat ing side a irbag can cause serious
or fata l injury. Impr oper ly weari ng safety
belts and imp roper seat ing pos it ions in­
crease the risk of serious pe rsonal injury
and death whenever a vehicle is bei ng
used .
- In order to reduce the risk of i njur y when
the supplemental side airbag inflates:
-Always sit in an upright posit ion and
nev er lean aga inst th e area whe re the
suppleme nta l side airbag is located.
- Never let a child or anyone e lse res t
their head aga inst the s ide trim pane l
i n the area where t he supplementa l
s ide a irb ag i nflates.
- Always make sure that safety be lts a re
wor n cor rectly,
- Do not let anyone s itting in th e front
seat put the ir hand or any other parts
of thei r body ou t of the window.

Side curtain airbags
Description of side curtain airbags
The side curtain airbag system can provide
supplemental protection to properly restrain ­
ed occupants .
Fig. 1 53 Side cur ta in airbags, d river 's side: side curta in
ai rb ag location
The s ide curtain airbags are located on both
sides of the interior above the front and rear
side w indows
r=:> fig . 153 . They are identified
by the word "AIRBAG " on the windshie ld
frame and the center roof p illar.
The s ide curtain airbag system supp lements
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 struc k
i n a side collision . Th e side curta in a irbag in­
flates in s ide impacts and on ly when the veh i­
cle acce leration reg istered by the cont ro l u nit
is high enough . If th is rate is be low the refer ­
ence va lue programmed into the control unit,
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
fine an a irbag trigger ing range that w ill cover
eve ry possible angle of impact , since the ci r­
cumsta nces wi ll vary conside rably between
one co llision and ano ther. Import ant factors
include, for e xamp le, the nat ure ( hard o r soft)
of the impacting object, the ang le of impact ,
ve hicle speed, etc .
r=:> page 164, How side cur­
tain airbags work.
Aside from the ir normal safety function , safe ­
ty belts work to he lp keep the dr iver or front
passenger in position in the event of a co lli-
A irba g sy stem 163
sion so that the side curtain airbags can pro­
v ide protection.
T he airbag system is no t a subs titu te for your
sa fe ty be lt . Rather, it is part of the overa ll oc­
c u pant restra int system in your vehicle . A l­
ways remember that the airbag system can
only he lp to protect you if you are wearing
yo ur safety be lt and wearing it properly. This
is another reason why you should always wear
your safety be lts, not just because the law re ­
quires you to do so
r=:> page 134, General
notes .
It is important to remember that wh ile the
s ide curtain airbag system is designed to help
reduce the likelihood of ser ious injuries, other
injur ies, for examp le, swelling, bru is ing, and
minor abrasions can also be associa ted wi th
these airb ags upon deployment. Remember
too, these airbags will deploy only once and
only in certain kinds of acc idents -your sa fety
belts are always there to offer protection.
The side curtain airbag system basically
con sists of:
-The e lectronic control module and external
side impact sensors
- The side curtain airbags above the fron t and
rea r side windows
- The airbag i ndicator light in t he instr ument
pane l
T he airbag system is mo nitored e lectronically
to make ce rtain i t is func tioning prope rly at all
t imes. Each t ime you sw itch on the ign ition,
the ai rbag system indicator light will come on
for a few seconds (self diagnostics).
The s ide curtain airbag is not activated :
-if the ignition is sw itched off,
- in side co llisions when the accele ration
measu red by the sensor is too low,
- in rear-end coll is ions,
- in rollovers.
A WARNING
-,
-Safety belts and the airbag system will
only provide protection when occupants