2018 TOYOTA YARIS iA sensor

YARIS iA_OM_OM99Q46z_(U)
671-4. 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 inspect a damaged front door
Modifying a front door or leaving any damage unrepaired is dangerous.
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 side 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 occupants.
■ Do not modify the supplemental restraint system
Modifying the components or wiring of the supplemental restraint system is
dangerous. You could accidentally activate it or make it inoperable. Do not
make any modifications to the supplemental restraint system. This includes
installing trim, badges, or anything else over the air bag modules. It also
includes installing extra electrical equipment on or near system components
or wiring. Your Toyota dealer can provide the special care needed 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 accidentally 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 dangerous. 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 prevent 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 dama ged air bag/seat belt pretensioner
system components
Expended or damaged air bag/seat belt pretensioner system components
must be replaced after any collision which caused them to deploy or dam-
age them. Only a trained Authorized Toyota Dealer can fully evaluate 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 which could
result in serious injury or death.

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YARIS iA_OM_OM99Q46z_(U)
1-4. SRS Air Bags
WARNING
■Do not remove interior air bag parts
Removing any components such as the front seats, front dashboard, the
steering wheel or parts on the front and rear window pillars and along the
roof edge, containing air bag parts or sensors is dangerous. These 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.

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YARIS iA_OM_OM99Q46z_(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 pretensioner system warning light ( →P. 156)
Roll-over sensor, crash sensors, and diagnostic module (SAS unit)
Front passenger air bag deactivation indicator light ( →P. 7 9 )
Front air bag sensors
Seat belt pretensioners ( →P. 3 6 )
Front passenger occupant classification sensor (→ P. 7 8 )
Front passenger occupant classification module1
2
3
4
5
6
7
8
9
10

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YARIS iA_OM_OM99Q46z_(U)
1-4. SRS Air Bags
How the SRS Air Bags Work
◆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 operate when a side collision (only on
the side in which the collision occurs) or a roll-over accident is
detected. The pretensioners operate differently depending on what
types of air bags are equipped. For details on the seat belt preten-
sioner operation, refer to the SRS Air Bag Deployment Criteria
( → P. 74).
◆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 depl oyment, refer to “SRS Air Bag
Deployment Criteria” ( →P. 7 4 ) .
The driver’s dual-stage air bag controls air bag inflation in two
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 air
bags are designed to provide further protection for passengers
in addition to the seat belt functions. Be sure to wear seat belts
properly.

YARIS iA_OM_OM99Q46z_(U)
711-4. SRS Air Bags
1
Essential Safety Equipment
◆Front Passenger Air Bag
The front passenger air bag is mounted in the front passenger
dashboard.
The inflation mechanism for the
front passenger air bag is the
same as the driver’s air bag, as
mentioned above.
For more details about air bag
deployment, refer to “SRS Air
Bag Deployment Criteria”
(→ P. 74).
In addition, the front passenger ai r bag is designed to only deploy in
accordance with the total seated weight on the front passenger
seat. For details, refer to the front passenger occupant classifica-
tion system ( →P. 7 8 ) .
◆Side Air Bags
The side air bags are mounted in the outboard sides of the front
seatbacks.
When the air bag crash sensors
detect a side impact of greater
than moderate force, the sys-
tem inflates the side air bag
only on the side in which the
vehicle was hit. The side air
bag inflates quickly to reduce
injury to the driver or front pas-
senger’s chest caused by
directly hitting interior parts
such as a door or window.
For more details about air bag depl oyment, refer to “SRS Air Bag
Deployment Criteria” ( →P. 7 4 ) .
In addition, the front passenger side air bag is designed to only
deploy in accordance with the total seated weight on the front pas-
senger seat. For details, refer to the front passenger occupant clas-
sification system ( →P. 78).

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YARIS iA_OM_OM99Q46z_(U)
1-4. SRS Air Bags
◆Curtain Air Bags
The curtain air bags are mounted in the front and rear window pil-
lars, and the roof edge along both sides.
When the air bag crash sensors detect a side impact of greater
than moderate force, the curtain ai r bag inflates quickly and helps to
reduce injury mainly to the rear outboard passenger’s head caused
by directly hitting interior pa rts such as a door or window.
For more details about air bag depl oyment, refer to “SRS Air Bag
Deployment Criteria” ( →P. 7 4 ) .
In a side impact
Greater than moderate impact to on e side of the vehicle will cause
the curtain air bag on that side only to inflate.
Only one side curtain air bag
will deploy on the side of the
vehicle that receives the force
of an impact.
In a roll-over
In response to a vehicle roll-over, both curtain air bags inflate.
Both curtain air bags will deploy
after the roll-over accident is
detected.

YARIS iA_OM_OM99Q46z_(U)
751-4. 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 classification
sensor detects a passenger sitting on the front passenger’s seat.
*2:In a side collision, the seat belt pretensioners and the side/curtain air bags
deploy (only on the side in which the collision occurs).
*3:In a roll-over accident, the seat belt pretensioners and the curtain air bags
deploy.
In a frontal offset collision, the equipped air bags and pretensioners may all
deploy depending on the direction, angle, and rate of impact.

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YARIS iA_OM_OM99Q46z_(U)
1-4. SRS Air Bags
Front Passenger Occupant Classification
System
Your vehicle is equipped with a front passenger occupant classifica-
tion sensor as a part of the supple mental restraint system. This sen-
sor is equipped in the front passen ger’s seat cushion. This sensor
measures the electrostatic capacity of the front passenger’s seat. The
SAS unit is designed to prevent th e front passenger front and side air
bags and seat belt pretensioner syst em 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 front
and side air bags and also the seat belt pretensioner system when the
front passenger air bag deactivation indicator light turns on. Refer to
the following table for the front pas senger air bag deactivation indica-
tor light illumination conditions.
This system shuts off the front pa ssenger front and side air bags and
seat belt pretensioner system, so make sure the front passenger air
bag deactivation indicator light turns on according to the following
table.
The air bag/front seat belt pretensioner system warning light flashes
and the front passenger air bag deactivation indicator light illuminates
if the sensors have a possible malfun ction. If this happens, the front
passenger front and side air bags and seat belt pretensioner system
will not deploy.
First, please read “Supplementa l Restraint System (SRS) Pre-
cautions” ( →P. 62) carefully.
Front Passenger Occupant Classification Sensor