2020 TOYOTA YARIS sensor

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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
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

YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
851-4. SRS Air Bags
1
Essential Safety Equipment
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
Sitting in the front passenger’s seat with a posture which make s it difficult
for the front passenger occupant classification sensor to detec t the occu-
pant correctly is dangerous. If the front passenger occupant classification
sensor cannot detect the occupant sitting on the front passenge r’s seat cor-
rectly, the front passenger front and side air bags and pretens ioner system
may not operate (deploy) or they may operate (deploy) accidenta lly. The
front passenger will not have the supplementary protection of t he air bags or
the accidental operation (deployment) of the air bags could res ult in serious
injury or death. Under the following conditions, the front pass enger 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:
● 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 passenge r’s seat or
between the passenger’s back and the seatback.

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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
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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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
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.

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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
2-4. Fuel and Emission
2
Before Driving
Fuel and Engine Exhaust Precautions
Vehicles with catalytic converters or oxygen sensors must use O NLY
UNLEADED FUEL, which will reduc e exhaust emissions and keep
spark plug fouling to a minimum.
To achieve maximum engine perfor mance, use the specified fuel.
*1: U.S. federal law requires that octane ratings be posted on gas station
pumps.
Fuel with a rating lower than 87 octane (91 RON) could cause th e
emission control system to lose e ffectiveness. It could also cause
engine knocking and serious engine damage.
Gasoline blended with oxygenates such as alcohol or ether com-
pounds are generally referred to as oxygenated fuels. The commo n
gasoline blend that can be used with your vehicle is ethanol bl ended
at no more than 10 %. Gasoline containing alcohol, such as etha nol or
methanol, may be marketed under the name “Gasohol”.
Vehicle damage and drivability problems resulting from the use of the
following may not be covered by the warranty. • Gasohol containing m ore than 10 % ethanol.
• Gasoline or gasohol containing methanol.
• Leaded fuel or leaded gasohol.
Fuel Requirements
FuelOctane Rating*1 (Anti-knock index)
Regular unleaded fuel87 [(R+M)/2 method] or above (91 RON or above)
NOTICE
●USE ONLY UNLEADED FUEL.
Leaded fuel is harmful to the catalytic converter and oxygen se nsors and
will lead to deterioration of the emission control system and o r failures.
● This vehicle can only use oxygenated fuels containing no more t han 10 %
ethanol by volume. Damage to the vehicle may occur when ethanol
exceeds this recommendation, or if the gasoline contains any me thanol.
Stop using gasohol of any kind if your vehicle engine is performing poorly.
● Never add fuel system additives other than a Toyota genuine pro duct, oth-
erwise the emission control system could be damaged. Consult yo ur Toy-
ota dealer for details.

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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
3When Driving
3-1. Start/Stop EngineIgnition Switch ................... 156
Starting the Engine ........... 158
Turning the Engine Off ...... 163
3-2. Combination Meter and Display
Meters and Gauges .......... 164
Warning/Indicator Lights .............................. 173
3-3. Transaxle Manual Transaxle Operation ........................ 177
Automatic Transaxle Controls........................... 181
3-4. Switches and Controls Lighting Control ................. 192
Fog Lights ......................... 198
Turn and Lane-Change Signals ............................ 199
Windshield Wipers and Washer..................... 201
Rear Window Wiper and Washer............................ 206
Rear Window Defogger ......................... 207
Hazard Warning Flasher ............................ 208 3-5. Brake
Brake System.................... 209
Hill Launch Assist (HLA) ... 213
3-6. ABS/TCS/DSC Antilock Brake System (ABS) .............................. 215
Traction Control System (TCS) .............................. 216
Dynamic Stability Control (DSC) .............................. 218
3-7. Fuel Economy Monitor Fuel Economy Monitor ...... 221
3-8. Drive Selection Drive Selection (Automatic Transaxle) ..... 224
3-9. Power Steering Power Steering ................. 226
3-10. Active Safety System Active Safety System ........ 227
Low Speed Pre-Collision System ............................ 228
Laser Sensor..................... 234
3-11. Cruise Control Cruise Control ................... 236
3-12. Tire Pressure Monitoring System
Tire Pressure Monitoring System ............................ 241
3-13. Rear View Monitor Rear View Monitor ............ 245

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YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)
3-2. Combination Meter and Display
The light illuminates continuously
when the engine coolant tempera-
ture is low and turns off after the
engine is warm.
If the low engine coolant tempera-
ture indicator light remains illumi-
nated after the engine has been
sufficiently warmed up, the tem-
perature sensor could have a mal-
function. Consult your Toyota
dealer.
Low Engine Coolant Temperature Indicator Light (Blue)