2021 TOYOTA YARIS tires

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4-5. Using the driving support systems
■Lane departure alert function
When the system determines that
the vehicle might depart from its
lane or course*, a warning is dis-
played on the multi-information dis-
play, and either a warning buzzer
will sound or the steering wheel will
vibrate to alert the driver.
When the warning buzzer sounds or
the steering wheel vibrates, check the
area around your vehicle and carefully
WARNING
●The vehicle is driven in an area without white (yellow) lines, such as
in front of a tollgate or checkpoint, or at an intersection, etc.
●The white (yellow) lines are cracked, “Raised pavement marker” or stones are present.
●The white (yellow) lines cannot be seen or are difficult to see due to
sand, etc.
●The vehicle is driven on a road sur-
face that is wet due to rain, pud- dles, etc.
●The traffic lines are yellow (which may be more difficult to recognize than lines that are white).
●The white (yellow) lines cross over a curb, etc.
●The vehicle is driven on a bright surface, such as concrete.
●If the edge of the road is not clear or straight.
●The vehicle is driven on a surface that is bright due to reflected light,
etc.
●The vehicle is driven in an area
where the brightness changes sud- denly, such as at the entrances and exits of tunnels, etc.
●Light from the headlights of an oncoming vehicle, the sun, etc.,
enters the camera.
●The vehicle is driven on a slope.
●The vehicle is driven on a road which tilts left or right, or a winding
road.
●The vehicle is driven on an
unpaved or rough road.
●The traffic lane is excessively nar-
row or wide.
●The vehicle is extremely tilted due to carrying heavy luggage or having improper tire pressure.
●The distance to the preceding vehi-cle is extremely short.
●The vehicle is moving up and down a large amount due to road condi-
tions during driving (poor roads or road seams).
●When driving in a tunnel or at night with the headlights off or when a headlight is dim due to its lens
being dirty or it being misaligned.
●The vehicle is struck by a cross-
wind.
●The vehicle is affected by wind from
a vehicle driven in a nearby lane.
●The vehicle has just changed lanes
or crossed an intersection.
●Tires which differ by structure, man-
ufacturer, brand or tread pattern are used.
●Snow tires, etc., are equipped.
●The vehicle is being driven at
extremely high speeds.
Functions included in LTA
system

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4-5. Using the driving support systems
tor is turned on
●Instances of the Blind Spot Monitor unnecessarily detecting a vehicle
and/or object may increase in the fol- lowing situations:• When the sensor is misaligned due to
a strong impact to the sensor or its surrounding area• When the distance between your vehi-
cle and a guardrail, wall, etc., that enters the detection area is short• When driving up and down consecu-
tive steep inclines, such as hills, dips in the road, etc.• When vehicle lanes are narrow, or
when driving on the edge of a lane, and a vehicle traveling in a lane other than the adjacent lanes enters the
detection area • When driving on roads with sharp bends, consecutive curves, or uneven
surfaces • When the tires are slipping or spinning• When the distance between your vehi-
cle and a following vehicle is short • When an accessory (such as a bicycle carrier) is installed to the rear of the
vehicle
*: If equipped
■Types of sensors
Front corner sensors
Front center sensors
Rear corner sensors
Rear center sensors
■Display
When the sensors detect an object,
such as a wall, a graphic is shown
on the multi-information display
depending on the position and dis-
Toyota parking assist-
sensor*
The distance from your vehicle
to objects, such as a wall,
when parallel parking or
maneuvering into a garage is
measured by the sensors and
communicated via the multi-
information display and a
buzzer. Always check the sur-
rounding area when using this
system.
System components

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4-5. Using the driving support systems
■The Parking Support Brake func- tion (static object) will operate
when
The function will operate when the PKSB OFF indicator is not illuminated or
flashing ( →P.83, 84) and all of the fol- lowing conditions are met:
●Engine output restriction control• The Parking Support Brake is enabled.
• The vehicle speed is 15 km/h (9 mph) or less.
WARNING
●Do not replace a sensor with a part other than a genuine part.
●Do not subject a sensor or its sur-rounding area to a strong impact.
●Do not damage the sensors, and always keep them clean.
●If the area around a radar sensor is subjected to an impact, the system
may not operate properly due to a sensor malfunction. Have the vehi-cle inspected by any authorized
Toyota retailer or Toyota authorized repairer, or any reliable repairer.
■Handling the suspension
Do not modify the suspension, as changes to the height or inclination of
the vehicle may prevent the sensors from detecting objects correctly or cause the system to not operate or
operate unnecessarily.
■If the Parking Support Brake
function (static objects) oper- ates unnecessarily, such as at a railroad crossing
In the event that the Parking Support Brake function (static objects) oper-ates unnecessarily, such as at a rail-
road crossing, brake control will be canceled after approximately 2 sec-onds, allowing you to proceed forward
and leave the area, brake control can also be canceled by depressing the brake pedal. Depressing the acceler-
ator pedal after brake control is can- celed will allow you to proceed forward and leave the area.
■Notes when washing the vehicle
Do not apply intensive bursts of water
or steam to the sensor area.
Doing so may result in the sensor malfunctioning.
●When using a high pressure washer to wash the vehicle, do not spray the sensors directly, as doing
so may cause a sensor to malfunc- tion.
●When using steam to clean the vehicle, do not direct steam too close to the sensors as doing so
may cause a sensor to malfunction.
■When to disable the Parking Sup-
port Brake
In the following situations, disable the Parking Support Brake as the system
may operate even though there is no possibility of a collision.
●When inspecting the vehicle using a chassis roller, chassis dynamo or free roller
●When loading the vehicle onto a boat, truck or other transport vessel
●If the suspension has been modi-fied or tires of a size other than
specified are installed
●If the front of the vehicle is raised or
lowered due to the carried load
●When equipment that may obstruct
a sensor is installed, such as a tow- ing eyelet, bumper protector (an additional trim strip, etc.), bicycle
carrier, or snow plow
●When using an automatic car wash

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4-5. Using the driving support systems
Driving
such as fog, snow or a sandstorm
• When the sensor is frozen (Once the
sensor thaws, the system will return to
normal)
●Vehicle surroundings
• When an object that cannot be
detected is between the vehicle and a
detected object
• If an object such as a vehicle, motor-
cycle, bicycle or pedestrian cuts in
front of the vehicle or runs out from
the side of the vehicle
• The vehicle is approaching a tall or
curved curb.
• On an extremely bumpy road, on an
incline, on gravel, or on grass.
• If objects draw too close to the sensor.
●Other ultrasonic waves sources
• When vehicle horns, vehicle detec-
tors, motorcycle engines, air brakes of
large vehicles, the clearance sonar of
other vehicles or other devices which
produce ultrasonic waves are near the
vehicle
• If a sticker or an electronic compo-
nent, such as a backlit license plate
(especially fluorescent type), fog
lights, fender pole or wireless antenna
is installed near a sensor
●Changes in the vehicle posture
• If the vehicle is significantly tilted
• If the front of the vehicle is raised or
lowered due to the carried load
• If the orientation of a sensor has been
changed due to a collision or other
impact
• When equipment that may obstruct a
sensor is installed, such as a bumper
protector (an additional trim strip,
etc.), bicycle carrier, or snow plow
• If the suspension has been modified
or tires of a size other than specified
are installed
• If a sensor has been painted or cov-
ered with a sticker, etc.

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4-5. Using the driving support systems
Driving
●When there are spinning objects near
your vehicle such as the fans of an air conditioning unit
●When water is splashed or sprayed toward the rear bumper, such as from a sprinkler
■Situations in which the Parking
Support Brake function (rear-cross- ing vehicles) may not operate prop-erly
In some situations, such as the follow- ing, the radar sensors may not detect an object and this function may not operate
properly
●Stationary objects
●When a sensor or the area around a sensor is extremely hot or cold
●If the rear bumper is covered with ice, snow, dirt, etc.
●When it is raining heavily or water strikes the vehicle
●When the detection area of a radar sensor is obstructed by an adjacent
vehicle
●If the vehicle is significantly tilted
●When equipment that may obstruct a sensor is installed, such as a towing
eyelet, bumper protector (an addi- tional trim strip, etc.), bicycle carrier, or snow plow
●If the suspension has been modified or tires of a size other than specified
are installed
●If the front of the vehicle is raised or
lowered due to the carried load
●If an electronic component, such as a
backlit license plate (especially fluo- rescent type), fog lights, fender pole
or wireless antenna is installed near a
radar sensor
●If the orientation of a radar sensor has
been changed
●When multiple vehicles are approach-
ing with only a small gap between each vehicle
●If a vehicle is approaching the rear of your vehicle rapidly
●Situations in which the radar sensor may not detect a vehicle• When a vehicle approaches from the
right or left at the rear of the vehicle while you are turning while backing up• When turning while backing up
• When backing out of a shallow angle parking spot
• When backing up on a slope with a sharp change in grade

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4-5. Using the driving support systems
Driving
tions may be generated from the brake
system, but this is not a malfunction.
■EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be
heard. This does not indicate a malfunc- tion.
■Automatic reactivation of TRC, Trailer Sway Control and VSC sys-
tems
After turning the TRC, Trailer Sway Con- trol and VSC systems off, the systems
will be automatically re-enabled in the following situations:
●When the engine switch is turned off
●If only the TRC system is turned off,
the TRC will turn on when vehicle speed increases.If both the TRC and VSC systems are
turned off, automatic re-enabling will not occur when vehicle speed increases.
■Operating conditions of Active Cor-
nering Assist
The system operates when the following occurs.
●TRC/VSC can operate
●The driver is attempting to accelerate while turning
●The system detects that the vehicle is drifting to the outer side
●The brake pedal is released
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is
reduced to prevent the system from overheating when there is frequent steering input over an extended period
of time. The steering wheel may feel heavy as a result. Should this occur, refrain from excessive steering input or
stop the vehicle and turn the engine off. The EPS system should return to nor-mal within 10 minutes.
■Operating conditions of emergency
brake signal
When the following conditions are met, the emergency brake signal will oper-
ates:
●The emergency flashers are off
●Actual vehicle speed is over 55 km/h (35 mph)
●The system judges from the vehicle deceleration that it is a sudden brak-
ing operation.
■Automatic system cancelation of emergency brake signal
The emergency brake signal will be can-
celed in any of the following situations:
●The emergency flashers are turned
on.
●The system judges from the vehicle
deceleration that is not a sudden brak- ing operation.
■Secondary Collision Brake operat-ing conditions
The system operates when the SRS air- bag sensor detects a collision while the vehicle is in motion.
However, the system does not operate when components are damaged.
■Secondary Collision Brake auto-matic cancelation
The system is automatically canceled in any of the following situations.
●The vehicle speed drops approxi-mately 0 km/h (0 mph)
●A certain amount of time elapses during operation
●The accelerator pedal is depressed a large amount
WARNING
■The ABS does not operate effec-
tively when
●The limits of tire gripping perfor- mance have been exceeded (such
as excessively worn tires on a snow covered road).

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4-5. Using the driving support systems
WARNING
●The vehicle hydroplanes while driv- ing at high speed on wet or slick
roads.
■Stopping distance when the ABS
is operating may exceed that of normal conditions
The ABS is not designed to shorten
the vehicle’s stopping distance. Always maintain a safe distance from the vehicle in front of you, especially
in the following situations:
●When driving on dirt, gravel or
snow-covered roads
●When driving with tire chains
●When driving over bumps in the road
●When driving over roads with pot-holes or uneven surfaces
■TRC/VSC may not operate effec-tively when
Directional control and power may not be achievable while driving on slip-pery road surfaces, even if the
TRC/VSC system is operating. Drive the vehicle carefully in conditions where stability and power may be
lost.
■Active Cornering Assist does not
operate effectively when
●Do not overly rely on Active Corner- ing Assist. Active Cornering Assist
may not operate effectively when accelerating down slopes or driving on slippery road surfaces.
●When Active Cornering Assist fre-quently operates, Active Cornering
Assist may temporarily stop operat- ing to ensure proper operation of the brakes, TRC and VSC.
■Hill-start assist control does not operate effectively when
●Do not overly rely on hill-start assist
control. Hill-start assist control may not operate effectively on steep inclines and roads covered with ice.
●Unlike the parking brake, hill-start assist control is not intended to hold
the vehicle stationary for an extended period of time. Do not attempt to use hill-start assist con-
trol to hold the vehicle on an incline, as doing so may lead to an acci-dent.
■When the TRC/VSC/Trailer Sway Control is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may cause an accident. Exercise particular
care when the indicator light flashes.
■When the TRC/VSC/Trailer Sway
Control systems are turned off
Be especially careful and drive at a speed appropriate to the road condi-
tions. As these are the systems to help ensure vehicle stability and driv-ing force, do not turn the
TRC/VSC/Trailer Sway Control sys- tems off unless necessary.Trailer Sway Control is part of the
VSC system and will not operate if VSC is turned off or experiences a malfunction.
■Replacing tires
Make sure that all tires are of the
specified size, brand, tread pattern and total load capacity. In addition, make sure that the tires are inflated to
the recommended tire inflation pres- sure level.The ABS, TRC Trailer Sway Control
and VSC systems will not function correctly if different tires are installed on the vehicle.
Contact any authorized Toyota retailer or Toyota authorized repairer, or any reliable repairer for further information
when replacing tires or wheels.

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4-5. Using the driving support systems
Driving
WARNING
■Handling of tires and the suspen- sion
Using tires with any kind of problem or modifying the suspension will affect the driving assist systems, and may
cause a system to malfunction.
■Trailer Sway Control precaution
The Trailer Sway Control system is not able to reduce trailer sway in all situations. Depending on many fac-
tors such as the conditions of the vehicle, trailer, road surface and driv-ing environment, the Trailer Sway
Control system may not be effective. Refer to your trailer owner’s manual for information on how to tow your
trailer properly.
■If trailer sway occurs
Observe the following precautions. Failing to do so may cause death or serious injury.
●Firmly grip the steering wheel. Steer straight ahead. Do not try to
control trailer sway by turning the steering wheel.
●Begin releasing the accelerator pedal immediately but very gradu-ally to reduce speed.
Do not increase speed. Do not apply vehicle brakes.
If you make no extreme correction with the steering or brakes, your vehi-cle and trailer should stabilize.
( →P.152)
■Secondary Collision Brake
Do not rely solely upon the Secondary Collision Brake. This system is designed to help reduce the possibil-
ity of further damage due to a second- ary collision, however, that effect changes according to various condi-
tions. Overly relying on the system may result in death or serious injury.