2020 TOYOTA YARIS belt

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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.

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1-4. SRS Air Bags
SRS Air Bag Deployment Criteria
This chart indicates the applicable SRS equipment that will dep loy
depending on the type of collision.
(The illustrations are the repres entative cases of collisions.)
SRS
equipment
Types of collision
A severe frontal/near
frontal collisionA severe
side colli- sion
*2
A roll-over/near roll- over
*3
A rear colli-
sion
Front seat belt pre-
tensioner
X*1X*1X*1
No air bag and front seat belt
preten-
sioner will
be activated
in a rear
collision.Driver air bagX
Front pas-senger air bag
X*1
Side air bagX*1 (impact
side only)
Curtain air bagX (impact
side only)X (both sides)

YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
791-4. SRS Air Bags
1
Essential Safety Equipment
X: The SRS air bag equipment is designed to deploy in a collision.
*1:The front passenger front and side air bags and the seat belt pretensioner
are designed to deploy when the front passenger occupant classi fication
sensor detects a passenger sitting on the front passenger’s sea t.
*2:In a side collision, the seat belt pretensioners and the side/curtain air bags
deploy.
*3:In a roll-over accident, the seat belt pretensioners and the cu rtain air bags
deploy.
In a frontal offset collision, the equipped air bags and preten sioners may all
deploy depending on the direction, angle, and rate of impact.

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1-4. SRS Air Bags
Front Passenger Occupant Classification
System
Your vehicle is equipped with a f ront passenger occupant classifica-
tion sensor as a part of the supplemental restraint system. Thi s sen-
sor is equipped in the front pas senger’s seat cushion. This sensor
measures the electrostatic capacity of the front passenger’s se at. The
SAS unit is designed to prevent the front passenger front and side air
bags and seat belt pretensioner system from deploying if the front
passenger air bag deactivation indicator light turns on.
To reduce the chance of injuries caused by deployment of the front
passenger air bag, the system deactivates the front passenger f ront
and side air bags and also the seat belt pretensioner system wh en the
front passenger air bag deactivat ion indicator light turns on. Refer to
the following table for the front passenger air bag deactivatio n indica-
tor light illumination conditions.
This system shuts off the front p assenger front and side air bags and
seat belt pretensioner system, s o make sure the front passenger air
bag deactivation indicator light turns on according to the foll owing
table.
The air bag/front seat belt pretensioner system warning light f lashes
and the front passenger air bag deactivation indicator light il luminates
if the sensors have a possible ma lfunction. If this happens, the front
passenger front and side air bags and seat belt pretensioner sy stem
will not deploy.
First, please read “Supplemental Restraint System (SRS) Pre-
cautions” ( P. 66) carefully.
Front Passenger Occupant Classification Sensor

YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
831-4. SRS Air Bags
1
Essential Safety Equipment
■Front passenger air bag deactivation indicator light
This indicator light turns on to
remind you that the front pas-
senger front and side air bags
and seat belt pretensioner will
not deploy duri ng a collision.
If the front passenger occupant cl assification sensor is normal, the
indicator light turns on when the ignition is switched ON. The light
turns off after a few seconds. Then, the indicator light turns on or is
off under the following conditions:
■Front passenger air bag deactivat ion indicator light on/off con-
dition chart
*1: The occupant classification sensor may not detect a child seat ed on the
seat, in a child-restraint system, or a junior seat depending o n the child’s
physical size and seated posture.
*2: If a smaller adult sits on the front passenger seat, the senso rs might detect
the person as being a child depending on the person’s physique.
The curtain air bag is ready for inflating regardless of what t he front
passenger air bag deactivation in dicator light on/off condition chart
indicates.
Condition detected
by the front passen-
ger occupant classi-
fication systemFront passen-ger air bag
deactivation
indicator lightFront passen- ger front and
side air bagsFront passen- ger seat belt
pretensioner
system
Empty (Not occu-
pied)OnDeactivatedDeactivated
A child less than 1
year old is seated in
a child-restraint sys-
tem
OnDeactivatedDeactivated
Child*1On or offDeactivated or readyDeactivated or ready
Adult*2OffReadyReady

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1-4. SRS Air Bags
If the front passenger air bag deactivation indicator light does not
turn on when the ignition is swi tched ON and does not turn on a s
indicated in the front passenger air bag deactivation indicator light
on/off condition chart, do not allow an occupant to sit in the front
passenger seat and consult your Toyota dealer as soon as possi-
ble. The system may not wor k properly in an accident.
●The system requires about 10 seconds to alternate between turning the
front passenger front and side air bags and seat belt pretensio ner system on
or off.
● The front passenger air bag deactivation indicator light may tu rn on repeat-
edly if luggage or other items are put on the front passenger s eat, or if the
temperature of the vehicle’s interior changes suddenly.
● The front passenger air bag deactivation indicator light may tu rn on for 10
seconds if the electrostatic capacity on the front passenger se at changes.
● The air bag/front seat belt pretensioner system warning light might turn on if
the front passenger seat receives a severe impact.
● If the front passenger air bag deactivation indicator light doe s not turn on
after installing a child-restraint system on the front passenge r seat, first, re-
install your child-restraint system according to the procedure in this owner’s
manual. Then, if the front passenger air bag deactivation indic ator light still
does not turn on, install the child-restraint system on the rea r seat and con-
sult your Toyota dealer as soon as possible.
● If the front passenger air bag deactivation indicator light tur ns on when an
occupant is seated directly in the front passenger seat, have the passenger
re-adjust their posture by sitting with their feet on the floor , and then re-fas-
tening the seat belt. If the front passenger air bag deactivati on indicator light
remains turned on, move the passenger to the rear seat. If sitt ing in the rear
seat is not possible, slide the front passenger seat as far bac k as possible.
Consult your Toyota dealer as soon as possible.

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1-4. SRS Air Bags
WARNING
■Do not allow an occupant in the front passenger’s seat to sit w ith a
posture which makes it difficult for the front passenger occupa nt clas-
sification sensor to detect the occupant correctly
● A seat cover is put on the front passenger’s seat.
● Luggage or other items are placed on the seat with the child in the child-
restraint system.
● A rear passenger or luggage push or pull down on the front pass enger
seatback.
● Luggage or other items are placed on the seatback or hung on the head
restraint.
● The seat is washed.
● Liquids are spilled on the seat.
● The front passenger seat is moved backward, pushing into luggag e or
other items placed behind it.
● The front passenger seatback contacts the rear seat.
● Luggage or other items are placed between the front passenger s eat and
driver seat.
● An electric device is put on the front passenger’s seat.
● An additional electrical device, such as a seat warmer is installed to the
surface of the front passenger seat.
The front passenger front and side air bags and seat belt prete nsioner sys-
tems will deactivate if the front passenger air bag deactivatio n indicator light
turns on.
NOTICE
● To assure proper deployment of the front air bag and to prevent damage to
the sensor in the front seat cushion:
• Do not place sharp objects on the front seat cushion or leave heavy lug-
gage on them.
• Do not spill any liquids on the front seats or under the front seats.
● To allow the sensors to function properly, always perform the f ollowing:
• Adjust the front seats as far back as possible and always sit upright
against the seatbacks with seat belts worn properly.
• If you place your child on the front passenger seat, secure th e child-
restraint system properly and slide the front passenger seat as far back
as possible ( P. 57).

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1-4. SRS Air Bags
1
Essential Safety Equipment
Constant Monitoring
The following components of the air bag systems are monitored by a
diagnostic system: • Crash sensors, and diagnostic module (SAS unit)
• Front air bag sensors
• Air bag modules
• Side crash sensors
• Air bag/Front seat belt pret ensioner system warning light
• Front seat belt pretensioners
• Related wiring
• Front passenger air bag d eactivation indicator light
• Front passenger occupant classification sensor
• Front passenger occupant classification module
The diagnostic module continuously monitors the system’s readin ess.
This begins when the ignition is switched ON and continues whil e the
vehicle is being driven.