light AUDI TT ROADSTER 2018 Repair Manual

Airbag system
The PASSENGER AIR BAG OFF~; light in the
headliner tells you when the front Advanced Air­
bag on the passenger side has been turned off by
the electronic control unit.
E ach time you turn on the ignition, the
PASSEN­
GER AIR BAG OFF
"1; ON@ light will come on
for a few seconds and:
- PASSENGER AIR BAG OFF ~; will come on if
the front passenger seat is not occupied,
-PASSENGER AIR BAG OFF ~; will come on if
t h e e lectrica l capacitance measured by the ca­
pacitive passenger detection system for the
front passenger seat equa ls the combined ca ­
pacitance of an infant up to about one year of
age and one of the rearward-facing or forward­
facing child restraints listed in Federal Motor
Vehicle Safety Standard 208 w ith which the Ad­
vanced Airbag System in your vehicle was certi­
fied. For a listing of the ch ild restraints that
were used to cert ify your vehicle 's compliance
with the U.S. Safety Standard
¢page 218.
- PASSENGER AIR BAG OFF~; will come on if
there is a small child or ch ild rest raint on the
front passenger seat,
-PASSENGER AIR BAG ON @w ill go off if the
front passenger seat is occupied by an adult as
registered by the capacitive passenger detec­
tion system ¢
page 205, Monitoring the Ad­
vanced Airbag System .
The PASSENGER AIR BAG OFF~; light comes on
when electrical capacitance registered on t he
front passenger seat is equa l to or less than the
combined capacitance of a typica l 1 year -o ld in­
fant and one of the rearward-facing or forward ­
facing ch ild restraints listed in Federal Motor Ve­
h icle Safety Standard 208 with wh ich the Ad­
vanced A irbag System in your vehicle was cert i­
f ie d.
If the tota l electrical capac itance registered on
the front passenger seat is more than that of a
typical 1 year-old child but less than the we ight
of a small adult, the front a irbag on the passen­
ge r side ca n deploy (the
PASSENGER AIR BAG
OFF
"1; light does not come on).
If the
PASSENGER AIR BAG OFF "1; light does
not come on, the front a irbag on the passenger
196
side has not been turned off by the electronic
contro l unit and can deploy if the contro l unit
senses an impact that meets the conditions stor­
ed in its memory.
For example , the airbag may deploy
if:
-a small c hild that is heav ier than a typica l 1
year-old child is on the front passenger seat
(regard less of whethe r the child is in one of the
child sa fety seats listed ¢
page 218), or
- a child who has outgrown child restraints is on
the front passenger seat.
If the front passenger a irbag is turned off, the
PASSENGER AIR BAG OFF~; light comes on in
the headliner and stays on.
If the front passenger airbag deploys, the Feder­
al Standard requires the airbag to meet the "low
r isk" dep loyment cr iteria to reduce the r isk of in­
jury through interaction w ith the airbag. "Low
risk" deployment occurs in those crashes that
take place at lower decelerations as defined in
the e lectronic contro l unit ¢
page 206, PASSEN­
GER AIR BAG
OFF~; ON~ light.
A lways remember, a child seat or infant carrier
installed on the front seat may be struck and
knocked out of position by the rapidly inflating
passenger's airbag in a frontal col lision. The air­
bag could great ly reduce the effectiveness of the
c hi ld restraint and even ser iously injure the child
during inflat io n.
A WARNING
A child in a rearward-facing child seat instal­
led on the front passenger seat will be seri­
ously injured and can be killed if the front air­
bag inflates
-even with an Advanced Airbag
System.
- The inflat ing airbag will hit the child seat or
infant carrier with great force and will
smash the child seat and child against the
backrest, center armrest, door or roof.
- Forward-facing child seats installed on the
front passenger's seat may interfere with
the deployment of the airbag and cause se­
r ious personal injury to the ch ild.

Cl 00 .-< N r-­N .-< 0 r-­Vl 00
A WARNING
If, in exceptional circumstances, you must in­
stall a forward-facing child restraint on the
front passenger's seat:
- Always make sure the forward-fac ing seat
has been designed and certified by its man­
ufacturer for use on a front seat with a pas­
senger front and s ide a irbag.
- Never put the forward-facing child restraint
up against or ve ry near the instrument pan­
el.
- Always move the front passenger seat to
the highest position in the up and down ad­
justment range and move it back to the
re ar most position in the se at's fore and aft
adjustment range, as fa r away from the air ­
bag as possib le, before insta lling the for­
ward-facing child restraint .
-Always make sure that the safety belt upper
anchorage is behind the child restraint and
not next to or in front of the chi ld restraint
so that the safety belt will be properly pos i­
t ioned.
- Make sure that the
PASSENGER AIR BAG
OFF ~; light comes on and stays on a ll the
t ime whenever the ignition is switched on.
A WARNING
To red uce the risk of serious in jury, make s ure
that the
PASSENGER AIR BAG OFF ~; light
w ill be displayed whenever a child restra int is
installed on the front passenge r seat and the
ign ition is swi tched on.
-If the PASSENGER AIR BAG OFF ~; light
does not stay on, perfo rm the che cks descri­
bed
¢ page 205, Monitoring the Advanced
Airbag System .
-Have the airbag system inspe cte d by your
Audi dealer imme diately.
- Always caref ully follow instru ctions from
ch ild res tra int m anufa ctu rers when instal­
ling child restraints .
Airbag syste m
A WARNING
--
If, in exceptional c ircumstances, you must in­
stall a forward or rearward-facing child re­
stra int on the fron t passenger 's seat :
- Imp roper installat ion of child restraints can
reduce the ir effectiveness or even prevent
them from providing any pro tect ion .
- An improperly installed child restra int can
interfere wi th the airbag as it deploys and
serio usly injure or even kil l the chi ld -even
wit h an Advanced A irbag System.
- Always carefully follow the manufacturer's
instr uctions provided with the child seat or
earner.
- Always make sure that there is noth ing on
the front passenge r seat tha t will cause the
capacitive p assenge r de te ction system in
the sea t to signal to the Airb ag System th at
the seat is occup ied by a person when i t is
not, or to signal that it is occupied by some­
one who is heavier than the person actually
sitt ing on the seat. The presence of addi­
tional objects could cause the passenger
front ai rbag to be turned on when it should
be off, or cou ld cause the ai rbag to work in a
way that is different from the way it wou ld
h ave wo rked withou t the objec t on the seat.
197

Airbag syste m
airbag on the passenger side may or may not
deploy.
The
PAS SENGER AIR B AG OFF ~; light comes o n
when the e lectron ic control un it detects a total
e lectrica l capacitance on the front passenger seat
that requires the front airbag to be turned
off . If
the
PASSENGER AIR BAG OFF '1; light does not
come on, the front airbag on the passenger side has not been turned
off by the control unit and
can deploy if the control unit senses an impact
that meets the conditions stored in its memory .
If the tota l electrical capac itance registered on
the front passenger seat is more than that of a
typical 1 year -old, but less than the weight of a
small adult , the front airbag on the passenger
side may deploy (the
PASSENGER AIR BAG OFF
~ ; light does not come on).
For exampl e, th e airbag may d eploy if:
- a small child that is heavier than a typical 1
year-old ch ild is on the front passenger seat
(regardless of whether the child is in one of the
ch ild seats listed
r=;,page 218),
- a chi ld who has outgrown child restraints is on
the front passenger seat .
If the front passenger airbag is turned off , the
P ASS ENGER AIR BA G OFF~; light in the head­
liner will come on and stay on .
I f the front passenger airbag dep loys, the Feder ­
a l Standard requires the airbag to meet the "low
risk" deployment criteria to help reduce the risk
of injury through interaction with the airbag.
"Low risk" deployment occurs in those crashes
that take place at lower decelerations as def ined
i n the electronic control
un it ¢ page 205 .
Alw ays remember: Please be sure to read the im­
portant information in the sections that follow
and be sure to heed all of the WARNINGS .
A WARNING
To red uce the risk of inju ry when an a irbag in­
flates, a lways wear safety belts p roperly.
- If you are unrestrained, lean ing forward, s it­
t ing s ideways or out of pos ition in any way,
yo ur r isk of i njur y is m uch higher.
200
-You will a lso receive serious injuries and
could even be killed if yo u are up against the
airbag or too close to it when it inflates -
eve n with a n Advanced
Airbag ¢ page 194.
A WARNING
A child in a rearward-facing child seat instal­
led on t he front passenger seat will be seri­
ously injured and ca n be killed if the front air­
bag inflates -even with an Advanced Airbag
Sys tem.
- Altho ugh the Advanced Airbag System in
your veh icle is des igned to tur n
off the front
air bag w hen a rearward -fac ing c hild re ­
s traint has been installed on the front pas­
senger seat, nobody can abso lute ly guaran ­
tee t hat dep loyment is impossib le in all con ­
ceivab le situat ions that may happen d uring
the useful life of your vehicle.
- The inflating airbag will h it the ch ild seat or
infant carrier with great force and will
smash the child seat and child against the backrest, center armrest, door, or roof .
- If you m ust install a rearward facing child
safety seat on the front passenger seat be­
cause of except ional circ umstances and the
PASSENGER AIR BAG OFF ~; light does not
come on and stay on have t he a irbag system
inspected by yo ur Audi dea ler.
A WARNING
I f, in exceptional c ircumstances , you must in ­
s tall a forward -fa cing ch ild res trai nt on the
front passenger's seat:
- Always make sure the forward -fa cing sea t
has bee n des igned and certified by its man ­
ufacturer for use on a front seat with a pas ­
senge r front and side airbag.
- Never put the fo rward -facing chi ld restrain t
up against o r very near the instr ument pan ­
el.
- Always move the front passenger seat to
the highest position in the up and down ad ­
justment range and move it bac k to the
rearmost posit io n in the seat's fo re and aft

Cl 00 .-< N r--­N .-< 0 r--­Vl 00
adjustment range, as far away from the air­
bag as possib le, before insta lling the for­
ward-facing child restra int.
- Always make sure that the safety belt upper
anchorage is beh ind the child restraint and
not next to or in front of the chi ld restraint
so that the safety belt will be properly pos i­
t ioned.
- 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 w hen it is
not, or to sign al that it is occ upied by some­
one who is heavier than t he pe rson actua lly
sitting on the seat . The presence of addi­
tiona l objects could ca use the passenge r
front airbag to be turned on when it shou ld
be off, or could cause the airbag to work in a
way that is different from the way it would
have worked wi tho ut the object on t he seat .
- Make sure that the
PASSENGER AIR BAG
OFF ~; light comes on and stays on all the
t ime w henever the ignition is sw itc hed on.
Advanced Airbag System components
The front passenger seat in you r vehicle has a lot
of very impo rtant parts of the Advanced Airbag
Sys tem in it. These pa rts in cl ude the capaci tive
passenger detection system, w iring, brac kets,
and more. The control unit monitors the system
on the front passenger seat when the ignition is
switched on and turns the airbag indicator light
on when a malfunct ion in the one of the system
components is detected
¢ page 206. Because
the front passenger seat contains important
pa rts of the Advanced Airbag System, you must
take ca re to prevent it from be ing damaged .
D amage to the seat may p reve nt the Advanced
A irbag System fo r the fron t passenger seat from
doi ng its job in a crash.
The front Advanced Airbag System consists
of the following :
-Cr ash sensors in the front of the vehicle t hat
measure vehicle accelerat ion/dece lerat ion to
Airbag syste m
prov ide information to the Advanced A irbag
System about the severity of the cras h.
- An electronic contro l uni t, with integrated
cras h sensors for front and side impacts . The
control unit "decides" whether to fire the front
airbags based on the information rece ived from
the crash sensors . The control unit also "de­
cides" whether the safety belt pretensioners
should be activated.
- An Advanced A irbag w it h gas generator for the
driver inside the steering wheel hub .
- An Advanced A irbag w ith gas generator inside
the instrument panel for the front passenger.
- A capacit ive passenger detection system under ­
neat h the front passenger seat cover. This sys­
tem meas ures the e lectr ica l capacitance of the
person in the seat. The informat ion registered
is sent cont inuously to the elect ronic contro l
un it to reg ulate dep loymen t of the front Ad­
vance d Airbag on the p assenger side.
- An airbag monitor ing system and ind icator
ligh t
El in the inst rument cl uste r.
- A sensor in each front seat registe rs the d is­
t ance betwee n the respective seat and the
s teer ing whee l o r i nst rument p anel. The infor­
mation registered is sent con tinuous ly to the
elect ronic contro l unit to regu late dep loyment
of the front Advanced Airbags .
- The
PASSENGER AIR BAG OFF ~; lig ht comes
on and stays on in the
headliner¢ page 206,
fig. 164 and tells you when the front Advanced
Airbag on the passenger side has been turned
off.
- A sensor in the safety be lt latch for the driver
and for the front seat passenger that senses
whether that safety be lt is latched or not and
transmits this information to the e lectronic
control un it .
A WARNING
-
Damage to the front passenge r seat can pre­
vent the front airbag from wo rk ing prope rly.
- Imp roper repair or d isassembly of the front
passenger and driver seat will p reve nt the
Advanced A irbag Sys tem from f unct io ni ng
p roperly .
201

Airbag syste m
-Repairs to the front passenger seat must be
performed by qua lified and properly trained
workshop personnel.
- 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 parts from the
seat or disconnect wires from it.
- Never carry sharp objects in your pockets or
put them on the seat . The capacitive pas­
senger detection mat in the front passenger
seat will not function properly if it is punc­
tured.
- Never carry things on your lap or carry ob­
jects on the front passenger seat. Such ob­
jects can influence the capac itance regis­
tered by the capac itive passenger detection
system, so that incorrect information is p ro­
vided to the airbag control unit.
- Never store items under the front passenger
seat. Parts of the Advanced Airbag System
under the passenger sea t could be dam­
aged, preventing them and the airbag sys­
tem from working properly.
- Never place seat covers o r rep lacemen t up­
holstery that have not been spec ifically ap­
proved by Audi on the front seats.
- Seat covers can prevent the Advanced Air­
bag System from recogn izing child re ­
straints or occupants on the front passenge r
seat and prevent the side airbag in the seat
backrest from dep loying properly.
- If a seat heater has been retrofitted or oth­
erwise added to the front passenge r seat,
never install any ch ild restraint system on
this seat.
- Never use cush ions, pillows, blankets, or
similar items on the front passenger seat.
The add it iona l layers prevent the capacitive
passenger detection system from accurate ly
measuring the capac itance of the ch ild safe­
ty seat and/or the pe rson on the seat and
th us keep the Advanced Airbag System from
wor king p roperly.
- Never place o r use any electrical device
(s uch as a laptop, CD player, elect ronic
games dev ice, power inverter or seat heater
202
for child seats) on the front passenger seat
if the device is connected to the 12-volt
socket or the cigarette lighter socket. Such
dev ices can influence the capac itance regis­
tered by the capacitive passenger detection
system, so that incorrect informat ion is pro­
vided to the airbag cont rol unit.
- If you must use a child restra int on the fron t
passenger seat and the child restraint man­
ufacturer's instructions requ ire the use of a
towel, foam c ushion or someth ing else to
proper ly posit ion the child res tra int, ma ke
certain that the
PASSENGER AIR BAG OFF
~ ; light comes on and stays on whenever
the child restraint is installed on the front
passenger seat.
- If the
PASSENGER AIR BAG OFF ~; light
does not come on and stay on, have the air­ bag system inspected by your Audi dealer.
A WARNING
If the front passenger seat gets wet, dry it im­
mediately .
-If liquid soaks into the front passenger seat,
this can keep the airbag system from work­
ing properly and may, for instance, deacti­
vate the passenger frontal airbag.
If this
happens, the
PASSENGER AIR BAG OFF ~'
light will come on and s tay on together w ith
t he air bag indica to r li gh t
El in the instru­
ment cluster .
- If liqu id is pooled on the sea t, but has not
soaked in, th is may also keep the airbag sys­
tem from wor king p roper ly and cause the
passenger fronta l airbag to be enabled
(turned on), even though there is a properly
installed child restraint system on the seat.
Wet towels or other wet things on the seat
cushion can have the same effect . If the
front passenger fronta l airbag is turned on,
the
PASSENGER AIR BAG OFF ~, light will
turn off.
How the Advanced Airbag System
components work together
The front Advanced Airbag System and the side
airbags supp lement the protection offered by the
.,.

Cl co .... N ,....
N .... 0 ,....
Vl co
front three-point safety belts to help reduce the
risk of injury in a wide range of accident and
crash situations. Be sure to read the important
information about safety and heed the WARN­
INGS in this chapter.
Deployment of the Advanced A irbag System and
the activation of the safety belt pretensioners de­
pend on the deceleration measured by the crash
sensors and registered by the electronic control
unit . Crash severity depends on speed and decel ­
eration as well as the mass and stiffness of the
vehicle or object involved in the crash .
On the passenger side, regardless of safety belt
use, the front passenger frontal airbag will be
turned off if the electrical capacitance measured
by the capacitive passenger detection system on
the front passenger seat is less than the amount
programmed in the electronic control unit. The
front passenger frontal airbag will also be turned
off if the capacitance measured by the system for
the front passenger seat equals that of an infant
of about one year of age in one of the child seats
that was used to certify the Advanced Airbag Sys­
tem under Federal Motor Vehicle Safety Standard
208. The
PASSENGER AIR BAG OFF '1; light
comes on and stays on to tell you when the front
Advanced Airbag System on the passenger side
has been turned off
Q page 206.
A WARNING
To reduce the risk of injury when an airbag in­
flates, always wear safety belts properly.
- If you are unrestrained, leaning forward, sit­
ting sideways or out of position in any way,
your risk of injury is much higher.
- You will also receive serious injuries and
could even be killed if you are up against the
airbag or too close to it when it inflates
-
even with an Advanced Airbag Qpoge 194.
Airbag system
More important things to know about front
airbags
Fig. 163 Inflated front airbags
Safety belts are important to help keep front
seat occupants in the proper seated position so
that airbags can unfold properly and provide sup­
plemental protection in a frontal collision.
The front airbags are designed to provide addi­
tional protection for the chest and face of the
driver and the front seat passenger when:
- safety belts are worn properly,
- the seats have been positioned so tha t the oc-
cupant is properly seated as far as possible
from the airbag.
Because airbags inflate in the blink of an eye with
great force, things you have on your lap or have
placed on the seat could become dangerous pro ­
jectiles, and be pushed into you if the airbag in­
flates.
When an airbag deploys , fine dust is released.
This is normal 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 while the sup ­
plemental airbag system is designed to reduce
the likelihood of serious injuries, other injuries,
for example swelling, bruising and minor abra­
sions, can also happen when airbags inflate. Air­
bags do not protect the arms or the lower parts
of the body. Front airbags supp lement the three
point safety belts only in some frontal collisions
in which the vehicle deceleration is high enough
to deploy the airbags.
IJII,-
203

Airbag syste m
Front airbag s will not d eploy:
- i f the ig nition is switched off whe n a cr ash oc-
cu rs,
- i n s ide collisions,
- in rear-end collisions,
- in rollovers,
- when the crash decelerat ion measured by the
airbag system is less than the minimum thresh ­
old needed for airbag deployment as registered
by the electronic contro l unit .
The front p assenger airb ag will also not
deploy:
- when the front passenger seat is not occup ied,
- whe n the electrical capac itance measured by
the capacitive passenger detect ion system for
the front passenger seat indicates that the pas­
senger side frontal airbag must be switched off
by the electronic contro l unit (the
PASSENGER
A IR BAG
OFF ~; ligh t~ page 206 and how
they work comes on and stays on) .
.&_ WARNING
Sitting in the wrong position can increase the
risk of serious injury in crashes.
- To reduce the risk of injury when the airbags inflate, the driver and passengers must al­
ways sit in an upright position, must not
lean against or p lace any part of their body
too close to the area where the airbags are located.
- Occupants who are unbelted, out of position
or too close to the a irbag can be seriously
injured by an airbag as it unfolds with great
force in the b link of an
eye <=;> page 195.
.&_ WARNING
A child in a rearward-facing chi ld seat insta l­
led on the front passenger seat will be ser i­
ously inju red and can be killed if the front air­
bag inflates
-even with an Advanced Airbag
System.
- T he inflating a irbag w ill hit the child seat or
infant carrier with great force and will
smash the chi ld seat and child against the
backrest, center armrest, door or roof.
204
-
- Never install a rearward facing chi ld safety
seat on the front passenger seat unless the
PAS SEN GER AIR B AG OFF ~; light comes
on and stays on . If the
PA SSENGER AIR
BAG
OFF ~; light does not come on and stay
on, the inflat ing airbag will hit the chi ld
safety seat or infant carrie r wi th great force
and will smash the child safety seat and
child against the bac krest, door or roof .
Have the airbag system inspected immedi­
ately by your authorized Audi dealer .
.&_ WARNING
Objects between you and the airbag will in­
crease the r isk of injury in a crash by interfer­
ing with the way the airbag unfolds or by be­
ing pushed into you as the airbag inflates.
- Never hold things in your hands or on your lap when the veh icle is in use.
- Never transport items on or in the area of
the front passenger seat. Objects could
move into the area of the front airbags dur­
ing braking or other sudden maneuver and
become dangerous projectiles that can
cause serious persona l injury if the airbags
inflate.
- Never place or attach accesso ries o r othe r
objects (such as cup holders, telephone brackets, large, heavy or bulky ob jects) on
the doo rs, ove r or near the area ma rked
"AIRBAG" on the steering wheel, instru ­
ment panel, seat backrests or between
those areas and yourself. These objects
could cause injury in a crash, especially
when the a irbags inflate.
- Never recl ine the front passenger's seat to
transport objects. Items can also move into
the area of the side a irbag or the front air­
bag during brak ing or in a sudden maneu­
ver. Objects near the airbags can become projecti les and cause injury, part icularly
when the seat is reclined.
- Never p lace or t ransport objects on the
-
front passenger seat. Objects on the front
passenger seat could ca use the capaci tive
sensor in the seat to signal to airbag system
that the seat is occ upied by a person when it
..,

Cl 00 .-< N r-­N .-< 0 r-­Vl 00
in fact is not, or that the person on the seat
is heavier than he or she actually is. The
c h ange in electric capac itance b ecause o f
such obj ects can caus e the passenger front
airbag to be turned on when it should be
off, or can cause the a irbag to wo rk in a way
that is diffe rent from the way it would have
wor ked witho ut objec ts on the se at.
- Always make sure that the re is nothing on
the fron t passenger sea t that w ill cause the
c apa citi ve passenger dete ction system in
the seat to sign al to the Airbag Sys tem tha t
the seat is occupied by a person when it is not, or to signa l that it is occ upied by some­
one who is heavier than the person actually
sitting on the seat. The presence of an ob­
ject could cause the passenger front a irbag
to be t urned on when it sho uld be off, or
cou ld cause the ai rbag to wo rk 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 cre ate d when air bag s d eploy can
c ause bre athing problems for peop le w ith a
history of asthma or other breathing condi ­
tions .
- T o reduce the risk of brea thing pro blems,
those w ith 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,
o r into any cuts or sc ratches.
- If the resi due should get into your eyes,
flush them with water .
Airbag syste m
Monitoring the
Advanced Airbag System
Airbag monitoring indicator light
T wo separate indi cators monitor the func tion of
t he Advan ced Airbag Sys tem: the
E,I ligh t and
t he
PASSENGER AIR BAG OFF '1,; ; ON @ light.
The Adva nced A irbag System as well as the s ide
airbags with e je ct ion m itigat ion fe atures (i nclud­
i ng the e lectron ic cont ro l un it, senso rs and sys ­
tem wiring) are all monito red contin uous ly to
make su re that they are functioning proper ly
whenever the ignition is on. Eve ry t ime yo u tur n
o n the ignition, the a irbag system indicator light
m w ill come o n for a few seconds (function
check) .
The sy stem mu st be in spected when the
indicator light
E,I:
- does not come on when the ignition is sw itched
on,
- does not go out a few seconds afte r you have
sw itched on the ignition, or
- comes on while driv ing.
If an airbag system mal func tion is detected, t he
indicator light will come on to se rve as a constant
r eminder to have the system inspected immedi ­
ately.
If a ma lfunction occurs tha t turns the front air ­
bag on the passenge r side off , the
PASSENGER
AIR BAG OFF
'1,; ; light will come on and stay on
whenever the ignition is on.
A WARNING "---
An a irbag system that is not functioning prop­
e rly cannot prov ide supplemental protect ion
i n a fronta l crash.
- If the ai rbag ind icator light
<=> page 14
comes when the veh icle is being used, have
the system inspected immedia tely by your
author ized Audi dealer . It is possib le that
the air bag will inflate when i t is not sup­
posed to, or w ill not in flate w hen it should.
205

Airbag system
PASSENGER AIR BAG OFF 1!; ON @ light
Fig. 164 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 head Liner
~ fig. 164 .
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 m will
come on to signal a malfunction in the Advanced
Airbag System. Although the burned-out bulb
w ill not change the way the front passenger 's
fron tal airbag works, it will no longer be possible
to use the
PASSENGER AIR BAG OFF ~; ON@
light to ma ke sure tha t the ai rb ag on/off s tat us is
corre ct for the occup ant on t he fron t passenger
se at. Have the airbag system ins pected immed i­
ately by your a uthor ized Audi dea ler.
The PASSENGER AIR BAG OFF ~; ON@ light
will blink for about S seconds when:
-the capacitive passenger de tect ion sys tem,
which switches the front seat passenge r's fron­
t a l Adv anced Ai rbag on a nd off, detect s a
c h ange in t he sta tus of the front passenge r
sea t.
As soon as the
PASSENGER AIR BAG OFF ~; ON
@ light stop s blinking, always ma ke sure tha t the
air bag s tatus (on or off) as shown by t he light is
proper for the age, s ize and ele ct ric al c apacitance
of the person occupy ing the front passenger
seat . A lways make s ure that the safety belt for
the front passenge r seat is prope rly fastened.
The PASSENGER AIR BAG OFF ~;/ PASSENGER
AIR BAG
ON @ light will show the status of the
206
front seat passenger's frontal Advanced Airbag.
The PASSENGER AIR BAG
OFF "; light:
-will c om e o n if the fr ont p assenge r seat is not
o ccupi ed;
- will c om e o n if the ele ct ric al capac itance meas­
ured by the cap aci tive pa ssenger detectio n sys­
t em for the front passenge r seat equ als the
combined capac itance of an infant up to about
one year of age and one of the rea rwa rd-faci ng
or forward-fac ing chil d rest raints listed in Fed­
eral Motor Vehicle Safety Standard 208 with
which the Advanced A irbag System in your vehi­
cle was c ert ified; For a listing of the ch ild re­
strai nts that we re used to certify yo ur vehicle's
complia nce w it h t he U.S . Safe ty S tand ard
¢page 218 .
-w ill go out if the front passenger sea t is occu­
pie d by an adu lt as regis te red by the capac itive
passe nger detect io n sys tem.
- The
PASSENGER AIR BAG OFF "; light mus t
c ome on and st ay on if the ig nition is o n and ...
- a ca r bed has been ins talled o n the front pas­
senge r sea t, or
- a rea rwa rd -facing child restra in t has been in­
s talled on the front passenger s eat, o r
- a forward -fac ing ch ild res traint has been insta l­
led on the front passenger sea t,
- and if the electrical capacitance registe red on
the front passenge r seat is equal to or less t han
t he co mbine d cap acitance of a typical 1 year­
old inf ant and o ne of the rea rwa rd -f a cing or
forw ard-fa cing chi ld r estra in ts liste d in Fe deral
M oto r Vehicle S afety Standar d 208 with which
the Advanced Airbag System in your ve hicle was
certif ied.
If the fron t pa ssenger se at i s not o ccup ie d , the
fr ont airba g will not deploy, a nd the
PASSENGER
AIR BAG
OFF "; light will stay on .
Neve r ins tall a re ar war d-f acing child restr aint on
th e fr on t p assenger
sea t~ page 19 5, Child re­
s traints on the front seat
-some important
things to know
and ¢ page 21 6, Child safety .
If the PASSENGER AIR BAG OFF "; light
comes on ...
If th e PASSENGER AIR BAG OFF ~; light comes
o n when one of the condit io ns listed a bove is
llll-

Cl 00 .-< N r-­N .-< 0 r-­Vl 00
met, be sure to check the light regularly to make
certain that the
PASSENGER AIR BAG OFF "1;
light stays on continuously whenever the ignition
is on. If the
PASSENGER 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 instal­ led 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 nstr uctions;
- make sure that the convertible locking 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, elect ronic games dev ice,
power inverter or seat heater for child seats) is
placed or used on the front passenger seat if
the device is connected to the 12 ·vo lt 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 still
does not come on ...
If the PASSENGER AIR BAG OFF "1; light still
does not come on and does not stay on continu­
ously (when the ignition is sw itched on),
- take the child restraint off the front passenger
seat and have the airbag system inspected by
your Audi dealer immed iate ly.
The PASSENGER AIR BAG OFF ~; light
should NOT come on ...
The PASSENGER AIR BAG OFF ~; light should
NOT come on when the ign ition is on and an
Airbag system
adult is sitting in a proper seating position 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 weight 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 capacitance.
Important safety instructions on
monitoring the Advanced Airbag System
A WARNING
-
-If the status of the Advanced Airbag System
has changed while the vehicle is moving, the
PASSENGER AIR BAG OFF "1; ON@ light
blinks for about 5 seconds to catch the driv­
er 's attention. If this happens, always stop
as soon as it is safe to do so and check the
steps described above .
- If the
PASSENGER AIR BAG OFF "1; light
does not go off when an adult who is not
very small is sitting on the front passenger
seat after taking the steps described above,
have the airbag system inspected by your
author ized Audi dealer before transporting
anyone on the front passenger seat.
A WARNING
-
An air bag system that is not functioning prop­
erly cannot provide supplemental protection
in a fronta l crash.
- If the airbag indicator light <=> page 14
comes when the vehicle is being used, have
207