TOYOTA AYGO 2011 Repair Manual

OCCUPANT RESTRAINT SYSTEMS51
MS13016a
To release the belt, press the red
buckle release button and allow the belt
to retract.
If the belt does not retract smoothly, pull
it out and check for kinks or twists. Then
make sure it remains untwisted as it re-
tracts.
MS13017a
The driver and front passenger seat
belt pretensioners are designed to be
activated in response to a severe fron-
tal impact.
When the sensor detects a severe frontal
impact, the front seat belts are quickly
drawn back by the retractors so that the
belts snugly restrain the occupants.
The seat belt pretensioners are activated
even with no passenger in the front seat.
The seat belt pretensioners and SRS air-
bags may not operate together in all colli-
sions.
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—Seat belt pretensioners

52OCCUPANT RESTRAINT SYSTEMS
MS13018a
The seat belt pretensionersystem con-
sists mainly of the following components
and their locations are shown in the il-
lustration.
1. SRS warning light
2. Airbag sensor assembly
3. Seat belt pretensioner assemblies
The seat belt pretensioners are controlled
by the airbag sensor assembly. The airbag
sensor assembly consists of a safing sen-
sor and airbag sensor.
When the seat belt pretensioners are acti-
vated, an operating noise may be heard
and a small amount of non−toxic gas may
be released. This does not indicate that
a fire is occurring. This gas is normally
harmless.
Once the seat belt pretensioners have
been activated, the seat belt retractors
remain locked.
If the vehicle is involved in multiple colli-
sions, the pretensioner will activate for the
first collision, but will not activate for the
second or subsequent collisions.
CAUTION
Observe the following precautions to
reduce the risk of injury in the event
of sudden braking or an accident.
Failure to do so may cause death or
severe injury.
DIf the pretensioner has activated,
the SRS warning light will come on.
In that case, the seat belt cannot
be used again and must be re-
placed at any authorized Toyota
dealer or repairer, or another duly
qualified and equipped professional.
DDo not modify, remove, strike or
open the seat belt pretensioner as-
semblies, airbag sensor or sur-
rounding area or wiring. Consult
any authorized Toyota dealer or re-
pairer, or another duly qualified and
equipped professional about any re-
pair and modification.
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OCCUPANT RESTRAINT SYSTEMS53
NOTICE
Do not perform any of the following
changes without consulting any
authorized Toyota dealer or repairer,
or another duly qualified and
equipped professional. Such changes
can interfere with proper operation of
the seat belt pretensioners in some
cases.
zInstallation of electronic devices
such as an RF−transmitter, cassette
tape player or compact disc player
zRepairs on or near the front seat
belt retractor assemblies
zModification of the suspension sys-
tem
zModification of the front end struc-
ture
zAttachment of a grille guard (bull
bar, kangaroo bar, etc.), snowplow,
winches or any other equipment to
the front end
zRepairsmadeonornearthefront
fenders, front end structure or con-
sole
MS13089
This indicator comes on when the en-
gine switch is turned to the “ON” posi-
tion. It goes off after about 6 seconds.
This means the seat belt pretensioners
are operating properly.
This warning light system monitors the
airbag sensor assembly, side airbag
sensors, side and curtain shield airbag
sensors, airbag manual on−off switch, seat
belt pretensioner assemblies, inflators,
warning light, interconnecting wiring and
power sources. (For details, see “Service
reminder indicators and warning buzzers”
on page 127 in Section 1−6.)
If any of the following conditions occurs,
this indicates a malfunction of the airbags
or seat belt pretensioners. Contact any
authorized Toyota dealer or repairer, or
another duly qualified and equipped
professional, as soon as possible.
DIf any front seat belt does not retract
or cannot be pulled out due to a mal-
function or activation of the relevant
seat belt pretensioner.
DThe seat belt pretensioner assembly or
surrounding area has been damaged.
The airbag manual on−offswitchisinthe
“ON” position:
DWhen the engine switch is turned to
the “ON” position, the light comes on
for more than 6 seconds and then
flashes.
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54OCCUPANT RESTRAINT SYSTEMS
DWhen the engine switch is turned to
the “ON” position, the light either re-
mains off or flashes.
DWhile driving the vehicle, the light
flashes.
The airbag manual on−offswitchisinthe
“OFF” position:
DWhen the engine switch is turned to
the “ON” position, the light comes on
for more than 6 seconds and then goes
off or flashes.
DWhen the engine switch is turned to
the “ON” position, the light remains off
or flashes without illuminating for more
than 6 seconds.
DWhile driving the vehicle, the light goes
off or flashes.
MS13001
In the following cases, contact any autho-
rized Toyota dealer or repairer, or another
duly qualified and equipped professional,
as soon as possible:
DThe front of the vehicle (shaded in the
illustration) was involved in an accident
that was not severe enough to cause
the seat belt pretensioners to operate.
DEither seat belt pretensioner assembly
or surrounding area is scratched,
cracked, or otherwise damaged.
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OCCUPANT RESTRAINT SYSTEMS55
MS13024a
The SRS (Supplemental Restraint Sys-
tem) front airbags are designed to pro-
vide further protection for the driver
and front passenger in addition to the
primary safety protection provided by
the seat belts.
In response to a severe frontal impact,
the SRS front airbags work with the seat
belts to help reduce injury by inflating.
The SRS front airbags help reduce injuries
mainly to the driver ’s or front passenger ’s
head or chest caused by hitting the ve-
hicle interior.
The front passenger airbag is activated
even with no passenger in the front seat.
Always wear your seat belt properly.
CAUTION
DThe SRS front airbag system is de-
signed only as a supplement to the
primary protection of the driver and
front passenger seat belt systems.
The driver and front passenger can
be killed or seriously injured by the
inflating airbags if they do not wear
the available seat belts properly.
During sudden braking just before
a collision, an unrestrained driver
or front passenger can move for-
ward into direct contact with or
close proximity to the airbag which
may then deploy during the colli-
sion. To ensure maximum protection
in an accident, the driver and all
passengers in the vehicle must
wear their seat belts properly. Wear-
ing a seat belt properly during an
accident reduces the chances of
death or serious injury or being
thrown out of the vehicle. For
instructions and precautions con-
cerning the seat belt system, see
“Seat belts” on page 48 in this Sec-
tion.
DImproperly seated and/or restrained
infants and children can be killed
or seriously injured by the deploy-
ing airbags. An infant or child who
is too small to use a seat belt
should be properly secured using a
child restraint system. Toyota
strongly recommends that all in-
fants and children be placed in the
rear seat of the vehicle and proper-
ly restrained. The rear seat is the
safest for infants and children. For
instructions concerning the installa-
tion of a child restraint system, see
“Child restraint” on page 80 in this
Section.
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SRS driver airbag and front
passenger airbag

56OCCUPANT RESTRAINT SYSTEMS
The SRS front airbags are designed to
deploy in severe (usually frontal) colli-
sions where the magnitude and duration
of the forward deceleration of the ve-
hicle exceeds the designed threshold
level.
The SRS front airbags will deploy in the
event of an impact that exceeds the set
threshold level (the level of force corre-
sponding to an approximately 20−30
km/h [12−18 mph] frontal collision with
a fixed wall that does not move or de-
form).
However, this threshold velocity will be
considerably higher if the vehicle strikes
an object, such as a parked vehicle or
sign pole, which can move or deform on
impact, or if the vehicle is involved in an
underride collision (e.g. a collision in
which the front of the vehicle “underrides”,
or goes under, the bed of a truck etc.).
It is possible that in some collisions
where the forward deceleration of the ve-
hicle is very close to the designed thresh-
old level, the SRS front airbags and the
seat belt pretensioners may not activate
together.
Always wear your seat belts properly.
MS13091
Collision from the rear
Collision from the sideVehicle rollover
The SRS front airbags are not generally
designed to inflate if the vehicle is in-
volved in a side or rear collision, if it
rolls over, or if it is involved in a low−
speed frontal collision. But, whenever a
collision of any type causes sufficient
forward deceleration of the vehicle, de-
ployment of the SRS front airbags may
occur.
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OCCUPANT RESTRAINT SYSTEMS57
MS13004
Hitting a curb,
edge of pavement
or hard surfaceFalling into or
jumping over a
deep hole
Landing hard or vehicle falling
The SRS front airbags may also deploy
if a serious impact occurs to the under-
side of your vehicle. Some examples
are shown in the illustration.
MS13033c
The SRS front airbag system consists
mainly of the following components, and
their locations are shown in the illustra-
tion.
1. Airbag manual on−off switch
2. SRS warning light
3. Airbag module for front passenger
(airbag and inflator)
4. Airbag sensor assembly
5. Airbag module for driver
(airbag and inflator)
The airbag sensor assembly consists of a
safing sensor and airbag sensor.
The airbag sensor constantly monitors the
forward deceleration of the vehicle. If an
impact results in a forward deceleration
beyond the designed threshold level, the
system triggers the airbag inflators. At this
time a chemical reaction in the inflators
very quickly fills the airbags with non−tox-
ic gas to help restrain the forward motion
of the occupants. The front airbags then
quickly deflate, so that there is no ob-
struction of the driver ’s vision should it be
necessary to continue driving.
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58OCCUPANT RESTRAINT SYSTEMS
When the airbags inflate, they produce a
loud noise and release some smoke and
residue along with non−toxic gas. This
does not indicate a fire. This smoke may
remain inside the vehicle for some time,
and may cause some minor irritation to
the eyes, skin or breathing. Be sure to
wash off any residue as soon as possible
to prevent any potential skin irritation with
soap and water. If you can safely exit
from the vehicle, you should do so imme-
diately.
Deployment of the airbags happens in a
fraction of a second, so the airbags must
inflate with considerable force. While the
system is designed to reduce serious inju-
ries, primarily to the head and chest, it
may also cause other, less severe injuries
to the face, chest, arms and hands. These
are usually in the nature of minor burns
or abrasions and swelling, but the force of
a deploying airbag can cause more seri-
ous injuries, especially if an occupant’s
hands, arms, chest or head is in close
proximity to the airbag module at the time
of deployment. This is why it is important
for the occupant to: avoid placing any
object or part of the body between the
occupant and the airbag module; sit
straight and well back into the seat; wear
the available seat belt properly; and sit as
far as possible from the airbag module,
while still maintaining control of the ve-
hicle.
Parts of the airbag module (steering wheel
hub, airbag cover and inflator) may be hot
for several minutes after deployment, so
do not touch! The airbags inflate only
once. The windshield may be damaged by
absorbing some of the force of the inflat-
ing airbag.
CAUTION
The driver or front passenger who is
too close to the steering wheel or
dashboard during airbag deployment
can be killed or seriously injured.
Toyota strongly recommends that:
DThe driver sit as far back as pos-
sible from the steering wheel while
still maintaining control of the ve-
hicle.
DThe front passenger sit as far back
as possible from the dashboard.
DAll vehicle occupants must be prop-
erly restrained using the available
seat belts.
For instructions and precautions con-
cerning the seating position, see
“—Front seat precautions” on page
42 in this Section.
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OCCUPANT RESTRAINT SYSTEMS59
MS13028
DDo not sit on the edge of the seat
or lean against the dashboard when
the vehicle is in use, since the
front passenger airbag could inflate
with considerable speed and force.
Anyone who is up against, or very
close to, an airbag when it inflates,
can be killed or seriously injured.
Sit up straight and well back in the
seat, and always use your seat belt
properly.
MS13029
DToyota strongly recommends that all
infants and children be placed in
the rear seat of the vehicle and be
properly restrained.
DDo not allow a child to stand up or
kneel on the front passenger seat,
since the front passenger airbag
could inflate with considerable
speed and force. Otherwise, the
child may be killed or seriously in-
jured.
DDo not hold a child on your lap or
in your arms. Use a child restraint
system in the rear seat. For instruc-
tions concerning the installation of
a child restraint system, see “Child
restraint” on page 80 in this Sec-
tion.
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60OCCUPANT RESTRAINT SYSTEMS
MS13030
DDo not put anything or any part of
your body on or in front of the
dashboard or steering wheel pad
that houses the front airbag sys-
tem. They might restrict inflation or
cause death or serious injury as
they are projected rearward by the
force of the deploying airbags. Like-
wise, the driver and front passenger
should not hold objects in their
arms or on their knees.
DDo not modify or remove any wir-
ing. Do not modify, remove, strike
or open any components such as
the steering wheel pad, steering
wheel, column cover, front passen-
ger airbag cover, front passenger
airbag or airbag sensor assembly.
Doing so may prevent the front air-
bag system from activating correct-
ly, cause sudden activation of the
system or disable the system,
which could result in death or seri-
ous injury.
Failure to follow these instructions
can result in death or serious injury.
Consult any authorized Toyota dealer
or repairer, or another duly qualified
and equipped professional, about any
repair and modification.
NOTICE
Do not perform any of the following
changes without consulting any autho-
rized Toyota dealer or repairer, or
another duly qualified and equipped
professional. Such changes can inter-
fere with proper operation of the SRS
front airbag system in some cases.
zInstallation of electronic devices
such as an RF−transmitter, cassette
tape player or compact disc player
zModification of the suspension sys-
tem
zModification of the front end struc-
ture
zAttachment of a grille guard (bull
bar, kangaroo bar, etc.), snowplow,
winches or any other equipment to
the front end
zRepairsmadeonornearthefront
fenders, front end structure, con-
sole, steering column, steering
wheel or dashboard near the front
passenger airbag
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