2011 AUDI TT ROADSTER belt

120 Airbag sys te m
Advanced front airbag system
Yo ur veh icle is equippe d with a fro nt Advanced
A ir b ag System in com pliance with Un ited
States Federal Motor Vehicle Safety Standard 208 as applicab le at the time your vehicle was
manufactured.
The front Advanced Airbag Sys tem supp le­
ments the safety belts to provide addit ional
protection for the driver's and front passeng­
er's heads and upper bodies in frontal crashes.
The airbags inflate only in fronta l impacts
when the vehicle dece lerat ion is high enough.
The front Advanced Airbag System for the
front seat occupants is not a substitute for
your safety be lts. Rather, it is part of the over ­
all occupant restraint system in your veh icle.
Always remember that the airbag system can
only help to protect you, if you are s itting up­
right, wear ing you r safety belt and wearing it
properly. This is why you and your passenge rs
must always be properly restra ined, not just
beca use the law requires you to be.
The Advanced Airbag System in your veh icle
has been cert ified to meet the "low risk" re­
qu irements for
3 and 6 year-o ld childre n on
the passenger side and very small adu lts on
the dr iver side. The low risk deployment cri te ­
ria are intended to he lp red uce the risk of in ­
jury through interaction with the front airbag
that can occ ur, for example, by be ing too
close to the steer ing wheel and instrument
panel when the airbag i nflates.
I n addition, the system has been certif ied to
comp ly with the "suppression" requirements
of the Safety Standard, to turn off the front
a irbag for infants
12 months old and younger
who are restra ined on the front passenger
seat in ch ild restra ints that are listed in the
Standard
~ page 138, Child restraints and
Advan ced Airbags.
"Suppression" requires the front airbag on the
passenger side to be tur ned off if:
- a ch ild up to about one year of age is re­
stra ined on the front passenger seat in one
of the rear -facing or forwa rd -facing infant restraints listed in Federal
Motor Vehicle
Safety Standard 208 with which the Ad­
vanced Airbag System in your veh icle was
cert ified. For a listing of the child restraints
that were used to certify your vehicle's com­
pliance w ith the US Safety Standard
~page 138,
-weight less than a threshold level stored in
the control unit is detected on the front pas­ senger seat .
When a person is detected on the front pas­
senger seat, weighing more than the total
we ight of a chi ld that is about
1 year old re ­
stra ined in one of the rear-facing o r forward­
facing infa nt restraints ( listed in Fede ral Mo­
tor Vehicle Safety Standa rd 208 w it h which
t h e Advan ced Airbag Sys tem in yo ur vehicle
was certif ied), the front air bag on the passen­
ger side may or may not deploy .
T he
PASSENGER AIR BAG OFF light comes on
whe n the elec tro nic con tro l unit detects a to­
ta l we ight on the fron t passenger seat that re ­
quires the front airbag to be t urned off . If the
PASSENGER AIR BAG OFF light does not
come on, the front a irbag on the passenger
s ide has not been t urned off by the contro l
unit and ca n dep loy if the control u nit senses
an impact that meets the cond itions stored in
its memory.
If the total weight on the front passenger
seat is more than that of a typical
1 year-old,
but less than the we ight of a small adult, the
front a irbag on the passenger side may dep loy
(the
PASSENG ER AIR BAG OFF light does not
come on).
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
(regard less of whether the child is i n one of
the child safe ty seats listed
~ page 138),
-a child who has outgrown child restraints is
on the front passenger seat .
If the front passenger airbag is turned off, the
PASSENGER AIR BAG OFF light in the center
of the instrument panel will come on and stay o n . ..,.

The front airbag on the passenger side may
not dep loy (the PA SSENGER AIR BAG OFF
light does not illuminate and stay lit) if:
- a small adu lt or teenager is on the fron t pas ­
senger seat
- a passenger who is not sitt ing upright w ith
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 .
I f the front passenger airbag deploys, the
F ederal Standard requires the a irbag to meet
the " low risk" deployment criteria to help re­
duce the risk of injury through interaction
with the airbag. "Low risk" deployment occurs in those crashes that take place at lower de­
celerations as defined in the electronic co ntrol
un it
o page 125 .
Alway s rem ember : Please be sure to read the
important information in the sections that
follow and be sure to heed all of the WARN­
INGS.
8, WARNING
To reduce the risk of injury when an airbag
inflates, a lways wear safety belts prope rly.
- 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 serio us injuries and
cou ld even be killed if you are up against
the a irbag or too close to it when it in­
fla tes - even with an Advanced Airbag
opage 115 .
A WARNING ,~
A child in a rearward -facing child sa fety
seat insta lled on the front passenger seat
wi ll be seriously injured and can be ki lled if
the front a irbag inflates - even with an Ad­
vanced Airbag System.
- Although the Advanced Airbag System in
yo ur vehicle is designed to turn
off the
front a irbag when a rearward-fac ing
child restraint has been installed on the
front passenger seat, nobody can abso­ lute ly guarantee that deployment is im-
A irbag system 12 1
possible in all conceivable situations that
may happen dur ing the usefu l life of your
veh icle.
- The inflating airbag will h it the ch ild
safety seat or infant carrier with great
force and will smash the child safety seat and child against the backrest, door, or roof.
- If you must install a rearward fac ing
child safety seat on the front passenger
seat because of exceptional c ircumstan­
ces and t he
PASSENGER AIR BAG OFF
light does not come on and s tay on, im­
media tely ins ta ll the rear-fac ing ch ild
safety seat in a rear seating position and
have the airbag system inspected by your
Aud i dea le r.
A WARNING
If, in except iona l 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 fo r use on a front seat
wit h a passenger front and s ide a irbag.
- Never put the forward-facing child re­
straint up against or very near the instru­
ment panel.
- Always move the passenger seat into its
rearmost pos ition in the seat's fore and
aft ad justment range, as fa r away from
the airbag as possible, before install ing
the forwa rd-fa cing ch ild restra int. The
bac krest mus t be adju sted to a n up right
posi tion.
- Ma ke su re that the
PASSENGER AIR BAG
OFF
li ght comes on and stays on all the
time whenever the ignition is switched on.
Advanced Airbag System components
T he front passenger seat in yo ur vehicle has a
lot of very important parts of the Advanced
Airbag System in it. These parts include the
weight-sensing mat, sensors, w iri ng, brack-
ets, and more . The funct ion of the system in ..,.
•
•

122 Airbag sys te m
the front passenger seat is checked by t he
e lectronic control unit when the i gnition is on .
The control unit mon itors 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
a irbag ind icator light is described in greater
deta il be low. Because the front passenger
seat conta ins impo rtant parts of t he Ad­
v a nce d Airb ag System, you m ust ta ke ca re to
prevent it from be ing damaged. Damage to
the seat may prevent the Advanced Airbag for
the front passenger seat from doing its job in
a crash.
The f ront Advanced Airbag System
consi sts o f th e following :
-Crash sensors in the front of the veh icle that
measure veh icle acceleration/dece leration
to provide information to the Advanced Air­
bag System about the severity of the crash.
- An electronic contro l unit, with integrated
crash sensors for front and side impacts.
The contro l unit "decides" whether to fire
the front airbags based on the information received from the crash sensors. The contro l
unit a lso "dec ides" w hethe r th e safety be lt
pretensioners should be a ctivated.
- An Advanced Airbag with gas generator for
th e d river ins ide the steer ing whee l hub.
- An Advanced Airbag with gas generator in­
s ide the instrument pane l for the front pas­
senger.
- A weig ht-sens ing mat under the upholste ry
padd ing of the front passenger seat cush io n
t h at meas ure s the tot al we igh t on the seat.
T he information registered is sen t con tinu­
o usly to the electron ic cont ro l u nit to regu­
l ate dep loyment of the front A dvanced Air­
bag on the passenger side.
- An airbag monito ring system and indicator
li ght in the instrument cluster
¢ page 125.
- The PASSENGER AIR BAG OFF light comes
on and stays on in the center of the instru­
ment pane l¢
page 126, fig. 122 and tells
yo u when the front Advanced A irbag on the
passenger s ide has been turned off. -
A sensor below the safety be lt latch for the
front seat passenger to measure the tension on the safety belt . The tension on the safety
be lt and the weight registered by the
weight-sensing mat he lp the control unit
"decide" whether the front airbag for the
front passenge r seat should be turned off or
not
¢ page 116, Child restraints on the
front seat -some important things to
know.
- A senso r in the safety belt latch fo r th e d riv­
er and fo r the fro nt sea t passenger tha t
senses whet her t hat safety bel t is latche d or
not and transmi ts this information to t he
electronic control unit.
A WARNING
Damage to the front passenger seat can
p revent the front airbag from work ing
properly.
- Improper repair or d isassembly of the
front passenge r and dr iver seat will pre­
vent the Advanced Airbag System from
fu nctioning properly.
- Repairs to the front passenge r seat must
be pe rformed by qualified and p roperly
trained workshop personnel.
- Never rem ove t he front passenger or
driver seat from t he vehicle.
- Never
remove th e upho lstery from the
front passenge r seat.
- Never d isassemble or remove parts from
the seat or disconnect wires from it.
- Never carry sharp objects in yo ur poc kets
or place them on the seat. If the weight­
sensing mat in the passenge r seat is
punctured it cannot work properly .
- Never carry things on you r lap or carry
objects on the passenger seat. Such items can increase the weight registered
by the weight-sensing mat and send the
wrong in formation to the airbag co ntrol
un it.
- Never store items under the front pas­
senger sea t. Parts of the Advan ced Air­
b ag Sys tem unde r the p assenger se at
-
could be damaged, p reven ting t hem and ~

the airbag system from working proper­ly.
- Never place seat covers or replacement
upholstery that have not been specifical­
ly approved by Audi on the front seats.
- Seat covers can prevent the Advanced
Airbag System from recognizing child re­
straints or occupants on the front pas­
senger seat and prevent the side airbag
in the seat backrest from deploying prop ­
erly .
- Never use cushions, pillows, blankets or similar items on the front passenger
seat. The additional padding will prevent
the weight-sensing mat in the seat from
accurately registering the child restraint
or person on the seat and prevent the
Advanced Airbag System from function ­
ing properly.
- If you must use a child restraint on the
front passenger seat and the child re­
straint manufacturer's instructions re­
quire the use of a towel, foam cushion or
something else to properly position the
child restraint, make certain that the
PASSENGER AIR BAG OFF light comes
on and stays on whenever the child re­
straint is installed on the front passen­
ger seat .
- If the
PASSENGER AIR BAG OFF light
does not come on and stay on, have the
airbag system inspected by your Audi
dealer.
How the Advanced Airbag System
components work together
The front Advanced Airbag System and the
side airbags supplement the protection of­
fered by the front three-point safety belts
with pretensioners and load limiters and the adjustable head restraints to help reduce the
risk of injury in a wide range of accident and
crash situations . Be sure to read the impor­
tant information about safety and heed the
WARNINGS in this chapter.
Deployment of the Advanced Airbag System
and the activation of the safety belt preten-
Airbag system 123
sioners depend on the deceleration measured
by the crash sensors and registered by the
electronic control unit. Crash severity depends
on speed and deceleration as well as the mass
and stiffness of the vehicle or object involved
in the crash .
When the electronic control unit registers a
low severity crash and the safety belt is being
used, the airbag will not deploy. I f the safety
belt is not being used, the first stage deploys,
followed by the second stage after a much lat­
er time in the crash sequence.
If the electronic control unit registers a crash
of medium severity , the first stage of the air ­
bag deploys followed by the second stage at a
much later time in the crash sequence -re­
gardless of whether the safety belt is being
used or not . In higher severity crashes as reg­
istered by the electronic control unit, both the
first and second stages deploy almost at the
same time.
On the passenger side, regardless of safety
belt use, the airbag will be turned off if the
weight on the passenger seat is less than the
amount programmed in the electronic control
unit. The front airbag on the passenger side
will also be turned off if one of the child safe­
ty seats that has been certified under Federal
Motor Vehicle Safety Standard 208 has been
recognized on the seat. The
PASSENGER AIR
BAG OFF
light comes on and stays on to tell
you when the front Advanced Airbag on the passenger side has been turned off
¢ page 116, Child r estraints on the front s eat
- some important things to know.
_&, WARNING
To reduce the risk of injury when an airbag
inflates, always wear safety belts properly .
- If you are unrestrained , leaning forward,
sitting 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 in­
flates -even with an Advanced Airbag
¢ page 115.
•
•

124 Airbag system
More important things to know about
front airbags
F ig. 121 Inflated fro nt airbags
Safety belts are impo rtant to help keep fro nt
seat occupants in the p roper seated pos it io n
so that airbags can unfo ld prope rly 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 protect ion for the chest a nd 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 inflate in the blink of an eye
with great force, things you have on your lap or have placed on the seat could become dan­
ge rous projectiles, and be pushed into you if
the airbag inflates .
When an a irbag deploys, fine dust is released.
This is normal and is not caused by a fire in
the vehicle . This d ust is made up mostly of a
powder used to lubricate the airbags as they
deploy. It cou ld irritate s kin .
It is important to remember that while the
supp lemental airbag system is designed to re­
d uce the l ikelihood of serious in juries, other
in juries, fo r example swelling, bruisi ng and
m inor abras ions, ca n also happe n when air­
bags in flate. Airbags do not protect the a rms
or the lower pa rts of the body. Front airbags
only s upplement the t hree point safety belts
in some frontal collisions in which the vehicle deceleration
is high eno ugh to deploy the air ­
bags .
Front airbags will not deploy:
- if the ignition is sw itched off when a c rash
occu rs,
- in side co llisions,
- in rear-end co llisions,
- in rollovers,
-when the crash dece leration measured by
the airbag system is less than the min imum
threshold needed for a irbag deployment as
reg istered by the electronic control unit .
The front passenge r airbag will al so not
deploy:
- when the front passenger seat is not occu­
p ied,
- when t he weight on the front passenger
seat as sensed by the Advanced Airbag Sys ­
tem ind icates that the front ai rbag on the
passenger side has to be turned off by the
elec troni c con trol un it (the
PASSENGER AIR
BAG OFF
li ght comes on and st ays on) .
_&. WARNING ~
Sitting in the wrong position can increase
the r isk o f se rious injury i n crashes.
- To reduce the risk of inju ry w he n t he air ­
bags i nflate, the drive r and passengers
m ust always sit in an upr ight position,
m ust not lean aga inst or place any part
of their b ody too close to the area where
the airbags a re located .
- Occupants who are unbelted, out of posi­
tion or too close to the a irbag can be se­
rio usly injured by a n airbag as it unfolds
wit h great force i n the blink of an eye
¢page 116 .
_&. WARNING ~ -
A child in a rearward-fac ing c hild safety
seat in stalle d on the fron t passe nger s eat
will be serio usly inju re d and ca n be killed if
the front air bag in fla tes -even with an Ad­
vanced A irbag Sys tem.

126 Airbag system
con tinuously to serve as a constant remin der
to have the system inspected immed iately.
I f a malfu nction occurs that turns the front
a ir bag on the passenger side off, the
PAS SEN­
GER AIR BAG OFF
li ght will come on and stay
on whenever the ignition is on .
.&_ 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 the re may be somet hing
wrong with the Advanced Airbag System.
It is possible that the airbag will inflate
when it is not s upposed to, or w ill not in­
flate when it should.
- Have the airbag system inspected imme­
diat ely by your Au di dealer .
PASSENGER AIR BAG OFF light
Fig. 122 Sect ion from the instr um ent pa nel: PASS EN ­
GER AIR BA G OFF light
The PASSENGER AIR BAG OFF Light is Located
in the cen ter of the instr ument panel
~ fig. 122 .
The PAS SENGE R AIR BAG OFF Light will come
on and stay on to tell you when the front Ad·
vanced A irbag on the passenger side has been
turned off by t he e lectronic control unit. Each
time you tu rn on the ig nition, the
PASSEN­
GER AIR BAG OFF
li ght will flash for a few
seconds and:
- wi ll stay on if the fron t passenger seat is not
occupied,
- will stay on if there is a small child or ch ild
rest raint on the front passenger seat, -
will go out i f the front passenge r seat is oc­
cup ied by an adult as registered by the
weight -sensing mat .
T he
PASSENGER AIR BAG OFF light mu st
come on and stay on
if the ignition is on and
- a ca r bed has been installed on the front
seat , or
- a r earward-facing child rest raint has been
installed o n the front passenger seat, or
- a forward-fac ing ch ild restra int has b een in·
stalled on the front passenger seat , o r
- the weight reg iste red on the front passen­
ger seat is equal to o r less than the com·
b in ed weight o f a typical 1 year-old restra in­
ed in one of the rear-facing or forwa rd-fac ­
ing infant restraints Listed in Federal Motor
Ve hicle Safety Standard 208 with which the
Advanced A irbag System in you r vehicle was
certified .
If the front passenger seat is not occupied,
t h e front airbag wi ll not deploy, and the
PAS­
SENGER AIR BAG OFF
Light will stay on . Nev ­
er install a rea rward -facing child restraint on
t h e front passenger seat, the safest p lace for
a chi ld in any kind of ch ild restraint is at one
of the seating posit io ns on t he rear seat
~ page 116, Child restraints on the front seat
- some important things to know
and
~ page 136, Child Safety.
If the PA SSENGER AIR BAG OFF light come s
on
when one of the cond itions Listed above is
met, be sure to check the Light regu larly to
make ce rtain tha t t he
PASSENGER AIR BAG
OFF
Light stays on con tinuously wheneve r th e
ignition is on . If the
PASSENGER AIR BAG
OFF
Light does not appear and not stay on a ll
the time, stop as soon as it is safe to do so a nd
- reactivate the system by t urning the ign ition
off and then turning it on again;
- remove and reins tall the ch ild res tra int.
Make s ure that the ch ild restra int is properly
installed and that the safety belt for the
front passenger seat has been correctly .,.

routed around the child restraint as descri­
bed in the chi ld restraint manufacturer's
instruct ions;
- make sure that the convertible locking fea­
ture on the safety belt 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
that the sensor below the safety belt latch
on the seat can do its job
~ page 144 .
-make sure that th ings that may increase the
weight of the ch ild and child safety seat are
not being transpo rted on the front passen­
ger seat;
- make sure that the safety belt tension sen­
sor is not b locked. Shake the safety belt
latch on the front passenge r sea t back and
forth;
- If a st rap or tether is being used to tie the
child safety seat to the front passenger
seat, ma ke s ure that i t is not so tight tha t it
ca uses the weight -sensing mat to meas ure
more weight than is actually on the seat .
If the PASSENGER AIR BAG OFF light still
d oes not come o n
and does not stay on con­
tinuously (when the ignition is switched on),
- ta ke the ch ild restraint off the front passen-
ger seat and insta ll it p roperly at one of the
rear seat pos itions. Have the a irb ag system
inspected by your A udi dealer immediately.
- move the chi ld to a rea r seat posi tion and
make su re that the ch ild is p roperly res train ­
ed in a child restraint that is appropriate for
its size and age .
The
PASSENGER AIR BAG OFF light shou ld
NO T come on when the ign ition is on and an
ad ult is sitting in a proper seating position on
the front passenger seat.
If the PASSENGER
AIR B AG O FF
light comes on and stays on or
flashes for about 5 seconds while dr iv ing, un­
der these circumstances, make sure that:
- the ad ult on the front passenger seat is
properly seated on the center of the seat
c u shi on with h is or her back up against the
backrest and the backrest is not reclined
A irbag system 127
~ page 99, Proper occupant seating posi ­
tions,
- the adult is not tak ing we ight off the seat by
holding on to the passenger assist handle
above the front passenger door or support­
ing their weight on the armrest,
- the safety be lt is being properly worn and
that there is not a lot of s lack in the safety
be lt webbing,
- accessory seat covers or cushions or other
things that may cause an incorrect 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
PA SSEN GER AIR BAG O FF
light in the center of the instrument panel,
the message
PASS ENGE R AIR BAG O FF or
PASSENGER AIR BAG ON w ill briefly appear
i n the instrument cluster d isp lay . This is to in­
form the dr iver of the current front passenge r
a irbag sta tus.
Important safety instructions on
monitoring the Advanced Airbag System
A WARNING
An ai rbag system that is not functioning
p roperly cannot provide supplemental pro­
tection in a frontal crash.
- If the airbag ind icator light comes on, it
means that there may be something
wrong wi th the Advanced Airbag Sys tem.
It is poss ible that the ai rbag w ill inflate
when it is not supposed to, or will not in ­
f late when it sho uld .
- Have the airbag system inspected imme­
diate ly by yo ur Audi dealer.
A WARNING
If the front airbag inflates, a child without
a child restraint, in a rearward -facing child
safety seat or in a forward-facing child re­
straint that has not been proper ly installed
-
will be ser ious ly injured and can be killed. ~
•
•

equipment, cellular telephones and CB
radios, etc.) must be performed by a
qualified technician who has the training
and special equipment necessary.
- For any work on the airbag system, we
strongly recommend that you see your authorized Audi dealer or qualified work­
shop.
- Never modify the front bumper or parts
of the vehicle body .
- Always make sure that the side airbag
can inflate without interference:
- Never install seat covers or replace­
ment upholstery over the front seat­
backs that have not been specifically
approved by Audi.
- Never use additional seat cushions that cover the areas where the side airbags inflate.
- Damage to the original seat covers or
to the seam in the area of the side air­
bag module must always be repaired
immediately by an authorized Audi
dealer.
- The airbag system can be activated only once. After an airbag has inflated, it
must be replaced by an authorized Audi
dealer or qualified technician who has
the technical information, training and special equipment necessary.
- The airbag system can be deployed only
once. After an airbag has been deployed,
it must be replaced with new replace­
ment parts designed and approved espe­
cially for your Audi model version. Re­
placement of complete airbag systems
or airbag components must be per­
formed by qualified workshops only .
Make sure that any airbag service action
is entered in your Audi Warranty
& Main­
tenance booklet under
AIRBAG REPLACE ­
MENT RECORD.
-For safety reasons in severe accidents,
the alternator and starter are separated
from the vehicle battery with a pyrotech­ nic circuit interrupter.
Airbag system 129
-Work on the pyrotechnic circuit inter­
rupter must only be performed by a
qualified dealer - risk of an accident!
- If the vehicle or the circuit interrupter
is scrapped, all applicable safety pre­
cautions must be followed.
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,
lowering the vehicle, changing the stiffness of
the suspension, including the springs, suspen­
sion struts, shock absorbers etc. can change
the forces that are measu red by the airbag
sensors and sent to the electronic control unit. 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 deploy 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 possible 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. ..,.
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