Get EssentialSafetyEquipment -> Front Passenger Occupant Classification System Guide for Toyota Yaris 4 Door Fourth Generation (2021-2026)

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1-4. SRS Air Bags

Front Passenger Occupant Classification

System

First, please read “Supplemental Restraint System (SRS) Pre-

cautions” (P. 66) carefully.

Front Passenger Occupant Classification Sensor

Your vehicle is equipped with a front passenger occupant classifica-

tion sensor as a part of the supplemental restraint system. This sen-

sor is equipped in the front passenger’s seat cushion. This sensor

measures the electrostatic capacity of the front passenger’s seat. 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 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 passenger air bag deactivation indica-

tor light illumination conditions.

This system shuts off the front passenger 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 malfunction. If this happens, the front

passenger front and side air bags and seat belt pretensioner system

will not deploy.

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1-4. SRS Air Bags

■ 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 during a collision.

1

If the front passenger occupant classification 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 deactivation indicator light on/off con-

dition chart

Condition detected

by the front passen-

ger occupant classi-

fication system

Front passen-

ger air bag

deactivation

indicator light

Front passen-

ger seat belt

pretensioner

system

Front passen-

ger front and

side air bags

Empty (Not occu-

pied)

On

Deactivated

A child less than 1

year old is seated in

a child-restraint sys-

tem

On

Deactivated

Deactivated or

ready

Deactivated or

ready

Child*¹

Adult*²

On or off

Off

Ready

*¹: The occupant classification sensor may not detect a child seated on the

seat, in a child-restraint system, or a junior seat depending on the child’s

physical size and seated posture.

*²: If a smaller adult sits on the front passenger seat, the sensors 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 the front

passenger air bag deactivation indicator light on/off condition chart

indicates.

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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 switched ON and does not turn on as

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 work 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 pretensioner system on

or off.

●The front passenger air bag deactivation indicator light may turn on repeat-

edly if luggage or other items are put on the front passenger seat, or if the

temperature of the vehicle’s interior changes suddenly.

●The front passenger air bag deactivation indicator light may turn on for 10

seconds if the electrostatic capacity on the front passenger seat 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 does not turn on

after installing a child-restraint system on the front passenger 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 indicator light still

does not turn on, install the child-restraint system on the rear seat and con-

sult your Toyota dealer as soon as possible.

●If the front passenger air bag deactivation indicator light turns 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 deactivation indicator light

remains turned on, move the passenger to the rear seat. If sitting in the rear

seat is not possible, slide the front passenger seat as far back 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 with a

posture which makes it difficult for the front passenger occupant clas-

sification sensor to detect the occupant correctly

Sitting in the front passenger’s seat with a posture which makes it difficult

for the front passenger occupant classification sensor to detect the occu-

pant correctly is dangerous. If the front passenger occupant classification

sensor cannot detect the occupant sitting on the front passenger’s seat cor-

rectly, the front passenger front and side air bags and pretensioner system

may not operate (deploy) or they may operate (deploy) accidentally. The

front passenger will not have the supplementary protection of the air bags or

the accidental operation (deployment) of the air bags could result in serious

injury or death. Under the following conditions, the front passenger occu-

pant classification sensor cannot detect a passenger sitting on the front

passenger’s seat correctly and the deployment/non-deployment of the air

bags cannot be controlled as indicated in the front passenger air bag deac-

tivation indicator light on/off condition chart. For example:

1

●A front passenger is seated as shown in the following figure:

●A rear passenger pushes up on the front passenger seat with their feet.

●Luggage or other items placed under the front passenger seat or between

the front passenger seat and driver seat that push up the front passenger

seat bottom.

●An object, such as a seat cushion, is put on the front passenger’s seat or

between the passenger’s back and the seatback.

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1-4. SRS Air Bags

WARNING

■Do not allow an occupant in the front passenger’s seat to sit with a

posture which makes it difficult for the front passenger occupant 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 passenger

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 luggage or

other items placed behind it.

●The front passenger seatback contacts the rear seat.

●Luggage or other items are placed between the front passenger seat 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 pretensioner sys-

tems will deactivate if the front passenger air bag deactivation 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 following:

• 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 the child-

restraint system properly and slide the front passenger seat as far back

as possible (P. 57).

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EssentialSafetyEquipment -> Front Passenger Occupant Classification System for Your Toyota Yaris 4 Door Fourth Generation (2021-2026)

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