2020 TOYOTA YARIS HATCHBACK srs sensor

39
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
1-2. Seat Belt Systems
1
Essential Safety Equipment
Seat Belt Pretensioner and Load Limiting
Systems
◆Pretensioners
When a collision is detected, the pretensioners deploy simultan e-
ously with the air bags.
The pretensioners deploy simult aneously with the air bags when a
roll-over is also detected.
For deployment details, refer to the SRS Air Bag Deployment Cri te-
ria ( P. 78).
The front seat belt retractors remove slack quickly as the air bags
are expanding. Any time the air bags and seat belt pretensioners
have fired they must be replaced.
A system malfunction or operation conditions are indicated by a
warning.
Refer to Warning/Indi cator Lights on P. 173.
Refer to Air Bag/Front Seat Belt Pretensioner System Warning
Beep on P. 503.
In addition, the pretensioner system for the front passenger, l ike the
front and side passenger air bag, is designed to only deploy wh en
the front passenger occupant class ification sensor detects a pas-
senger sitting on the front passenger’s seat.
For details, refer to the front passenger occupant classificati on sen-
sor ( P. 8 2 ) .
For optimum protection, the d river and front passenger seat
belts are equipped with pretensi oner and load limiting systems.
For both these systems to work properly you must wear the seat
belt properly.

YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
571-3. Child Restraint
1
Essential Safety Equipment
If you cannot put all children in the rear seat, at least put the smallest
children in the rear and be sure the largest child up front use s a front-
facing child-restraint system.
NEVER put a rear-facing child-restraint system on the front pas senger
seat whether your vehicle is equ ipped with a occupant classification
sensor or not.
This seat is also not set up for tethered child-restraint syste ms, put
them in one of the rear seat posit ions set up with tether anchors.
Likewise the LATCH child-restraint system cannot be secured in the
front passenger’s se at and should be used in the rear seat.
Do not allow anyone to lean over or against the side window sin ce
your vehicle has side and curt ain air bags, it could cause serious inju-
ries to an out of position occup ant. As children more often sleep in
cars, it is better to pu t them in the rear seat.
If installing the child-restraint system on the front seat is u navoidable,
follow these instructions when using a front-facing child-restraint sys-
tem in the front passenger’s seat.
●To check if your front seats have side air bags:
The vehicle equipped with side air bag will have a “SRS AIRBAG” tag on the
outboard shoulder of the front seats.
● To check if your vehicle has curtain air bags:
The vehicle equipped with curtain air bag will have an “SRS AIR BAG” mark-
ing on the window pillars along the roof edge.
WARNING
■ Always attach the tether strap to the correct tether anchor pos ition
Attaching the tether strap to the incorrect tether anchor position is danger-
ous. In a collision, the tether strap could come off and loosen the child-
restraint system. If the child-restraint system moves it could result in death
or injury to the child.
■ Always install the head restraint and adjust it to the appropriate posi-
tion after removing the child-restraint system
Driving with the head restraint removed is dangerous as impact to the occu-
pant’s head cannot be prevented during emergency braking or in a collision,
which could result in a serious accident, injury or death.
Refer to Head Restraints on P. 30.
If You Must Use a Child-Restrai nt System in the Front Seat for
Children

66
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
1-4. SRS Air Bags
Supplemental Restraint System (SRS) Pre-
cautions
The front and side supplemental r estraint systems (SRS) include dif-
ferent types of air bags. Please verify the different types of air bags
which are equipped on your vehicl e by locating the “SRS AIRBAG”
location indicators. These indicators are visible in the area w here the
air bags are installed.
The air bags are installed in the following locations:
• The steering wheel hub (driver air bag)
• The front passenger dashboard (front passenger air bag)
• The outboard sides of the fron t seatbacks (side air bags)
• The front and rear window pilla rs, and the roof edge along both
sides (curtain air bags)
Vehicles with the Front Passenger Occupant Classification System
have a sensor which detects an impending roll-over accident.
The air bag supplemental restraint systems are designed to provide
supplemental protection in certa in situations so seat belts are always
important in the following ways:
Without seat belt usage, the ai r bags cannot provide adequate p rotec-
tion during an accident. Seat belt usag e is necessary to:
• Keep the occupant from being thr own into an inflating air bag.
• Reduce the possibility of injur ies during an accident that is not
designed for air bag inflati on, such as rear impact.
• Reduce the possibility of injuries in frontal, near frontal or side colli-
sions or roll-over accidents that are not severe enough to acti vate
the air bags.
• Reduce the possibility of being thrown from your vehicle.
• Reduce the possibility of injurie s to lower body and legs duri ng an
accident because the ai r bags provide no protection to these pa rts
of the body.
• Hold the driver in a position wh ich allows better control of the vehi-
cle.

70
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
1-4. SRS Air Bags
WARNING
■Do not touch the components of t he supplemental restraint system
after the air bags have inflated
Touching the components of the supplemental restraint system after the air
bags have inflated is dangerous. Immediately after inflation, t hey are very
hot. You could get burned.
■ Never install any front-end equipment to your vehicle
Installation of front-end equipment, such as frontal protection bar (kangaroo
bar, bull bar, push bar, or other similar devices), snowplow, o r winches, is
dangerous. The air bag crash sensor system could be affected. T his could
cause air bags to inflate unexpectedly, or it could prevent the air bags from
inflating during an accident. Front occupants could be seriously injured.
■ Do not modify the suspension
Modifying the vehicle suspension is dangerous. If the vehicle’s height or the
suspension is modified, the vehicle will be unable to accurately detect a col-
lision or roll-over accident resulting in incorrect or unexpect ed air bag
deployment and the possibility of serious injuries.
■ To prevent false detection by t he air bag sensor system, heed t he fol-
lowing
● Do not use tires or wheels other than those specified for your To y o t a :
Use of any tire or wheel other than those specified for your To yota (P. 553)
is dangerous. Use of such wheels will prevent the vehicle’s acc ident detec-
tions system from accurately detecting a collision or roll-over accident result-
ing in incorrect or unexpected air bag deployment and the possi bility of
serious injuries.
● Do not overload your vehicle:
Overloading your vehicle is dangerous as it could prevent the a ir bag
crash sensor system from accurately detecting a collision or roll-over acci-
dent resulting in incorrect or unexpected air bag deployment an d the pos-
sibility of serious injuries. The gross axle weight rating (GAW R) and the
gross vehicle weight rating (GVWR) for your vehicle are on the Motor
Vehicle Safety Standard Label on the driver’s door frame. Do not exceed
these ratings.
● Do not drive the vehicle off-road:
Driving your Toyota off-road is dangerous because the vehicle h as not
been designed to do so. Driving the vehicle off-road could prevent the air
bag crash sensor system from accurately detecting a collision o r roll-over
accident resulting in incorrect or unexpected air bag deploymen t and the
possibility of serious injuries.

YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
711-4. SRS Air Bags
1
Essential Safety Equipment
WARNING
■Do not modify a front door or l eave any damage unrepaired. Always
have your Toyota dealer ins pect a damaged front door
Modifying a front door or leaving any damage unrepaired is dang erous.
Each front door has a side crash sensor as a component of the supplemen-
tal restraint system. If holes are drilled in a front door, a door speaker is left
removed, or a damaged door is left unrepaired, the sensor could be
adversely affected causing it to not detect the pressure of an impact cor-
rectly during a side collision. If a sensor does not detect a s ide impact cor-
rectly, the side and curtain air bags and the front seat belt pretensioner may
not operate normally which could result in serious injury to oc cupants.
■ Do not modify the supplemental restraint system
Modifying the components or wiring of the supplemental restrain t system is
dangerous. You could accidentally activate it or make it inoper able. Do not
make any modifications to the supplemental restraint system. Th is includes
installing trim, badges, or anything else over the air bag modu les. It also
includes installing extra electrical equipment on or near syste m components
or wiring. Your Toyota dealer can provide the special care need ed in the
removal and installation of front seats. It is important to protect the air bag
wiring and connections to assure that the bags do not accidenta lly deploy,
and that the front passenger occupant classification system and the seats
retain an undamaged air bag connection.
■ Do not place luggage or other objects under the front seats
Placing luggage or other objects under the front seats is dange rous. The
components essential to the supplemental restraint system could be dam-
aged, and in the event of a side collision, the appropriate air bags may not
deploy, which could result in death or serious injury. To preve nt damage to
the components essential to the supplemental restraint system, do not
place luggage or other objects under the front seats.
■ Do not operate a vehicle with damaged air bag/seat belt pretens ioner
system components
Expended or damaged air bag/seat belt pretensioner system components
must be replaced after any collision which caused them to deplo y or dam-
age them. Only a trained Authorized Toyota Dealer can fully eva luate these
systems to see that they will work in any subsequent accident. Driving with
an expended or damaged air bag or pretensioner unit will not afford you the
necessary protection in the event of any subsequent accident wh ich could
result in serious injury or death.

72
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
1-4. SRS Air Bags
WARNING
■Do not remove interior air bag parts
Removing any components such as the front seats, front dashboar d, the
steering wheel or parts on the front and rear window pillars an d along the
roof edge, containing air bag parts or sensors is dangerous. Th ese parts
contain essential air bag components. The air bag could accidentally acti-
vate and cause serious injuries. Always have your Toyota dealer remove
these parts.
■ Properly dispose of the air bag system
Improper disposal of an air bag or a vehicle with live air bags in it can be
extremely dangerous. Unless all safety procedures are followed, injury
could result. Have your Toyota dealer safely dispose of the air bag system
or scrap an air bag equipped vehicle.

73
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
1-4. SRS Air Bags
1
Essential Safety Equipment
Supplemental Restraint System Compo-
nents
Side and curtain inflators and air bags
Side crash sensors
Driver/Front passenger inflators and air bags
Air bag/seat belt pretensi oner system warning light ( P. 173)
Roll-over sensor, crash sensors, and diagnostic module (SAS uni t)
Front passenger air bag deac tivation indicator light (P. 8 3 )
Front air bag sensors
Seat belt pretensioners ( P. 3 9 )
Front passenger occupant c lassification sensor (P. 8 2 )
Front passenger occupant classification module1
2
3
4
5
6
7
8
9
10

74
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
1-4. SRS Air Bags
How the SRS Air Bags Work
◆Front Seat Belt Pretensioners
The front seat belt pretensioners are designed to deploy in moder-
ate or severe frontal, near frontal collisions.
In addition, the pretensioners o perate when a side collision or a roll-
over accident is detected. The p retensioners operate differently
depending on what types of air bags are equipped. For more deta ils
about the seat belt pretensioner operation, refer to the SRS Ai r Bag
Deployment Criteria ( P. 7 8 ) .
◆Driver Air Bag
The driver’s air bag is mounted in the steering wheel.
When air bag crash sensors
detect a frontal impact of
greater than moderate force,
the driver’s air bag inflates
quickly helping to reduce injury
mainly to the driver’s head or
chest caused by directly hitting
the steering wheel.
For more details about air bag deployment, refer to “SRS Air Ba g
Deployment Criteria” ( P. 7 8 ) .
The driver’s dual-stage air bag controls air bag inflation in t wo
energy stages. During an impact of moderate severity, the driver’s
air bag deploys with lesser energy, whereas during more severe
impacts, it deploys with more energy.
Your Toyota is equipped with the following types of SRS air
bags. SRS air bags are designed to work together with the seat
belts to help to reduce injuries during an accident. The SRS ai r
bags are designed to provide further protection for passengers
in addition to the seat belt functions. Be sure to wear seat be lts
properly.