2021 TOYOTA YARIS Owners Manual

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4-5. Using the driving support systems
Driving
■When the accelerator pedal is depressed excessively
■When the vehicle moves in the unintended direction due to the
wrong shift lever being selected
→ P. 2 4 2
Types of sensorsWARNING
■To ensure the Parking Support Brake can operate properly
Observe the following precautions
regarding the sensors ( →P.242). Fail- ure to do so may cause a sensor to not operate properly, and may cause
an accident.
●Do not modify, disassemble or paint
the sensors.

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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
• There is a static object in the traveling
direction of the vehicle and 2 to 4 m (6
to 13 ft.) away.
• The Parking Support Brake deter-
mines that a stronger-than-normal
brake operation is necessary to avoid
a collision.
●Brake control
• Engine output restriction control is
operating
• The Parking Support Brake deter-
mines that an immediate brake opera-
tion is necessary to avoid a collision.
■The Parking Support Brake func-
tion (static objects) will stop oper-
ating when
The function will stop operating if any of
the following conditions are met:
●Engine output restriction control
• The Parking Support Brake is dis-
abled.
• The system determines that the colli-
sion has become avoidable with nor-
mal brake operation.
• The static object is no longer 2 to 4 m
(6 to 13 ft.) away from the vehicle or in
the traveling direction of the vehicle.
●Brake control
• The Parking Support Brake is dis-
abled.
• Approximately 2 seconds have
elapsed since the vehicle was
stopped by brake control.
• The brake pedal is depressed after
the vehicle is stopped by brake con-
trol.
• The static object is no longer 2 to 4 m
(6 to 13 ft.) away from the vehicle or in
the traveling direction of the vehicle.
■Re-enabling the Parking Support
Brake function (static objects)
→P. 2 5 4
■Detection range of the Parking Sup-
port Brake function (static objects)
The detection range of the Parking Sup-
port Brake function (static objects) dif-
fers from the detection range of the
Toyota parking assist-sensor. (→P.245)
Therefore, even if the Toyota parking assist-sensor detects an object and pro-
vides a warning, the Parking Support
Brake function (static objects) may not
start operating.
■Objects that the Parking Support
Brake function (static objects) may
not detect
The sensors may not be able to detect
certain objects, such as the following:
●Pedestrian
●Cotton cloth, snow, and other materi-
als that are poor reflectors of ultra-
sonic waves
●Objects which are not perpendicular
to the ground, are not perpendicular to
the traveling direction of the vehicle,
are uneven or are waving
●Low objects
●Thin objects such as wires, fences,
ropes and signposts
●Objects that are extremely close to
the bumper
●Sharply-angled objects
●Tall objects with upper sections pro-
jecting outwards in the direction of
your vehicle
■Toyota parking assist-sensor
buzzer
Regardless of whether the Toyota park-
ing assist-sensor buzzer is enabled or
not (→P.243), if the Parking Support
Brake function (static objects) is enabled
(→P.252), the front or rear sensors
detect an object and brake control is
performed, the Toyota parking assist-
sensor buzzer will sound to notify the
driver of the approximate distance to the
object.
■Situations in which the Parking
Support Brake function (static
objects) may operate even if there
is no possibility of a collision
In some situations, such as the follow-
ing, the Parking Support Brake function
(static objects) may operate even
though there is no possibility of a colli-
sion.

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4-5. Using the driving support systems
●Vehicle surroundings
• When driving on a narrow road
• When driving on a gravel road or in an
area with tall grass
• When driving toward a banner, flag,
low-hanging branch or boom barrier (such as those used at railroad cross-ings, toll gates and parking lots)
• When driving on a narrow path sur- rounded by a structure, such as in a tunnel or on an iron bridge
• When parallel parking • When there is a rut or hole in the sur-face of the road
• When driving on a metal cover (grat- ing), such as those used for drainage ditches
• When driving on a steep slope • If a sensor is hit by a large amount of water, such as when driving on a
flooded road
●Weather
• If a sensor is covered with ice, snow, dirt, etc. (when cleared, the system will return to normal)
• If heavy rain or water strikes a sensor • When driving in inclement weather such as fog, snow or a sandstorm
• When strong winds are blowing
●Other ultrasonic wave 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
• If a sensor has been painted or cov- ered with a sticker, etc.
■Situations in which the Parking Support Brake function (static
objects) may not operate properly
In some situations, such as the follow- ing, this function may not operate prop-
erly.
●Weather
• When a sensor or the area around a sensor is extremely hot or cold
• When strong winds are blowing
• If a sensor is covered with ice, snow,
dirt, etc. (when cleared, the system will return to normal)• If heavy rain or water strikes a sensor
• When driving in inclement weather

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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
*: If equipped
This function will operate in situations such as the following if a vehicle is
detected in the traveling direction of the vehicle.
■When reversing, a vehicle is approaching and the brake pedal is not
depressed, or is depressed late
→ P. 2 3 8
Parking Support Brake function (rear-crossing vehi-
cles)*
If a rear radar sensor detects a vehicle approaching from the right
or left at the rear of the vehicle and the system determines that the
possibility of a collision is high, this function will perform brake
control to reduce the likelihood of an impact with the approaching
vehicle.
Examples of function operation
Types of sensorsWARNING
■To ensure the Parking Support Brake (rear-crossing vehicles)
can operate properly
Observe the following precautions regarding the rear radar sensors
( →P.238). Failure to do so may cause a sensor to not operate properly, and may cause an accident.

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4-5. Using the driving support systems
Driving
■The Parking Support Brake func- tion (rear-crossing vehicles) 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.• Vehicles which are approaching from
the right or left at the rear of the vehi- cle at a traveling speed of less than approximately 8 km/h (5 mph)
• The shift lever is in R. • The Parking Support Brake deter-mines that a stronger than normal
brake operation is necessary to avoid a collision with an approaching vehi-cle.
●Brake control• Engine output restriction control is
operating
• The Parking Support Brake deter-
mines that an emergency brake oper- ation is necessary to avoid a collision with an approaching vehicle.
■The Parking Support Brake func-
tion (rear-crossing vehicles) will stop operating when
The function will stop operating if any of
the following conditions are met:
●Engine output restriction control
• The Parking Support Brake is dis- abled.• The collision becomes avoidable with
normal brake operation. • A vehicle is no longer approaching from the right or left at the rear of the
vehicle.
●Brake control
• The Parking Support Brake is dis- abled.• Approximately 2 seconds have
elapsed since the vehicle was stopped by brake control.• The brake pedal is depressed after
the vehicle is stopped by brake con- trol.• A vehicle is no longer approaching
from the right or left at the rear of the vehicle.
■Detection area of the Parking Sup-port Brake function (rear-crossing
vehicles)
The detection area of the Parking Sup- port Brake function (rear-crossing vehi-
cles) differs from the detection area of the RCTA function ( →P.249). Therefore, even if the RCTA function detects a
vehicle and provides an alert, the Park- ing Support Brake function (rear-cross-ing vehicles) may not start operating.
■Conditions under which the Park-
ing Support Brake function (rear- crossing vehicles) will not detect a vehicle
The Parking Support Brake function (rear-crossing vehicles) is not designed to detect the following types of vehicles
and/or objects:
●Vehicles approaching from directly
WARNING
●Do not modify, disassemble or paint the sensors.
●Do not replace a rear radar sensor with a part other than a genuine
part.
●Do not damage the rear radar sen-
sors, and always keep the radar sensors and their surrounding area on the bumper clean.
●If the area around a rear radar sen-sor is subjected to an impact, the
system may not operate properly due to a sensor malfunction. Have the vehicle inspected by any autho-
rized Toyota retailer or Toyota authorized repairer, or any reliable repairer.
●Observe the rear radar sensor han-dling precautions. ( →P.238)

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4-5. Using the driving support systems
behind
●Vehicles backing up in a parking space next to your vehicle
●Vehicles that the sensors cannot detect due to obstructions
●Vehicles which suddenly accelerate or decelerate near your vehicle
●Guardrails, walls, signs, parked vehi-
cles and similar stationary objects*
●Small motorcycles, bicycles, pedestri-
ans, etc.*
●Vehicles moving away from your vehi-
cle
●Vehicles approaching from the park-
ing spaces next to your vehicle*
●Objects which are extremely close to
a radar sensor*
●Vehicles which are approaching from the right or left at the rear of the vehi-cle at a traveling speed of less than
approximately 8 km/h (5 mph)
●Vehicles which are approaching from
the right or left at the rear of the vehi- cle at a traveling speed of more than approximately 24 km/h (15 mph)*: Depending on the conditions, detec-
tion of a vehicle and/or object may
occur.
■RCTA buzzer
Regardless of whether the RCTA func- tion is enabled or not ( →P.248), if the Parking Support Brake function is
enabled ( →P.252) and brake control is performed, a buzzer will sound to notify the driver.
■Situations in which the system may
operate even though there is no possibility of a collision
In some situations such as the following,
the Parking Support Brake function (rear-crossing vehicles) may operate even though there is no possibility of a
collision.
●When the parking space faces a street
and vehicles are being driven on the street
●When a detected vehicle turns while approaching the vehicle
●When a vehicle passes by the side of your vehicle
●When the distance between your vehi-cle and metal objects, such as a guardrail, wall, sign, or parked vehicle,
which may reflect electrical waves toward the rear of the vehicle, is short