2021 TOYOTA YARIS HATCHBACK brake sensor

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4-5. Using the driving support systems
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tance to the object.
Front corner sensor detection
Front center sensor detection
Rear corner sensor detection
Rear center sensor detection
Use the meter control switches to
enable/disable the Toyota parking
assist-sensor. ( →P.94, 100)
1 Press / (vertical display)
or / (horizontal display)
of the meter control switch to
select .
2 Press / (vertical display)
or / (horizontal display)
of the meter control switch to
select and then press .
When the Toyota parking assist-
sensor function is disabled, the
Toyota parking assist-sensor OFF
indicator ( →P.84) illuminates.
To re-enable the system when it
was disabled, select on the
multi-information display, select
and then on. If disabled using this
method, the system will not be re-
enabled by turning the engine
switch off and then to ON.
Turning Toyota parking
assist-sensor on/off
WARNING
■When using the Toyota parking
assist-sensor
Observe the following precautions. Failing to do so may result in the vehi-
cle being unable to be driven safely and possibly cause an accident.
●Do not use the sensor at speeds in excess of 10 km/h (6 mph).
●The sensors’ detection areas and reaction times are limited. When moving forward or reversing, check
the areas surrounding the vehicle (especially the sides of the vehicle) for safety, and drive slowly, using
the brake to control the vehicle’s speed.
●Do not install accessories within the sensors’ detection areas.
●The area directly under the bum-pers is not detected.Thin posts or objects lower than the
sensor may not be detected when approached, even if they have been detected before.
■When to disable the function
In the following situations, disable the
function as it may operate even though there is no possibility of a colli-sion.
●The vehicle is equipped with a fender pole, wireless antenna or fog
lights.

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●There will be a short delay between
object detection and display. Even at low speeds, there is a possibility that the object will come within the sen-
sor’s detection areas before the dis- play is shown and the warning beep sounds.
●It might be difficult to hear the buzzer due to the volume of the audio system
or air flow noise of the air conditioning system.
●It may be difficult to hear the buzzer if buzzers for other systems are sound-ing.
■Conditions under which the func-
tion may not function correctly
Certain vehicle conditions and the sur- rounding environment may affect the
ability of a sensor to correctly detect objects. Particular instances where this may occur are listed below.
●There is dirt, snow, water drops or ice on a sensor. (Cleaning the sensors
will resolve this problem.)
●A sensor is frozen. (Thawing the area
will resolve this problem.) In especially cold weather, if a sensor is frozen the sensor display may be
displayed abnormally, or objects, such as a wall, may not be detected.
●A sensor is covered in any way.
●When a sensor or the area around a
sensor is extremely hot or cold.
●On an extremely bumpy road, on an
incline, on gravel, or on grass.
●The vicinity of the vehicle is noisy due
to vehicle horns, motorcycle engines, air brakes of large vehicles, or other loud noises producing ultrasonic
waves.
●There is another vehicle equipped
with parking assist sensors in the vicinity.
●A sensor is coated with a sheet of spray or heavy rain.
●If a sensor is hit by a large amount of water, such as when driving on a
flooded road.
●If the vehicle is significantly tilted.
●The vehicle is approaching a tall or curved curb.
●If objects draw too close to the sensor.
■Objects which may not be properly detected
The shape of the object may prevent the
sensor from detecting it. Pay particular attention to the following objects:
●Wires, fences, ropes, etc.
●Cotton, snow and other materials that
absorb sound waves
●Sharply-angled objects
●Low objects
●Tall objects with upper sections pro- jecting outwards in the direction of your vehicle
People may not be detected if they are wearing certain types of clothing.
■Detection range of the sensors
Approximately 100 cm (3.3 ft.)
Approximately 150 cm (4.9 ft.)
Sensor detection display,
object distance

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• Immediately after the RCTA function
is turned on • Immediately after the engine is started with the RCTA function on
• When the sensors cannot detect a vehicle due to obstructions
●Instances of the RCTA function unnecessarily detecting a vehicle and/or object may increase in the fol-
lowing situations: • When a vehicle passes by the side of your vehicle
• When the parking space faces a street and vehicles are being driven on the street
• 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
• When a towing eyelet is installed to the rear of the vehicle
*: If equipped
■Parking Support Brake func-
tion (static objects)
→ P. 2 5 6
■Parking Support Brake func-
tion (rear-crossing vehicles)
→ P. 2 6 2
PKSB (Parking Support
Brake)*
The Parking Support Brake
system consists of the follow-
ing functions that operate
when driving at a low speed or
backing up, such as when
parking. When the system
determines that a collision
with a detected object is high,
a warning operates to urge the
driver to take evasive action. If
the system determines that the
possibility of a collision with a
detected object is extremely
high, the brakes are automati-
cally applied to help avoid the
collision or help reduce the
impact of the collision.
PKSB (Parking Support
Brake) system

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4-5. Using the driving support systems
The Parking Support Brake can be
enabled/disabled on the multi-infor-
mation display. All of the Parking
Support Brake functions (static
objects and rear-crossing vehicles)
are enabled/disabled simultane-
ously.
Use the meter control switches to
enable/disable the parking support
brake. ( →P.94, 100)
1 Press / (vertical display)
or / (horizontal display)
of the meter control switch to
select .
2 Press / (vertical display)
or / (horizontal display)
of the meter control switch to
select and then press .
WARNING
■Limitations of the Parking Sup- port Brake system
Do not overly rely on the system, as doing so may lead to an accident.
Always drive while checking the
safety of the surroundings of the vehi- cle.
Depending on the vehicle and road
conditions, weather, etc., the system may not operate.
The detection capabilities of sensors
and radars are limited. Always drive while checking the safety of the sur-roundings of the vehicle.
●The driver is solely responsible for safe driving. Always drive carefully,
taking care to observe your sur- roundings. The Parking Support Brake system is designed to pro-
vide support to lessen the severity of collisions. However, it may not operate in some situations.
●The Parking Support Brake system is not designed to stop the vehicle
completely. Additionally, even if the system has stopped the vehicle, it is necessary to depress the brake
pedal immediately as brake control will be canceled after approximately 2 seconds.
NOTICE
■If “PKSB Unavailable” is dis-played on the multi-information
display and the PKSB OFF indi- cator is on
If this message is displayed immedi-
ately after the engine switch is changed to ON, operate the vehicle carefully, paying attention to your sur-
roundings. It may be necessary to drive the vehicle for a certain amount of time before the system returns to
normal. (If the system does not return to normal after driving for a while, clean the sensors and their surround-
ing area on the bumpers.)
Enabling/Disabling the Park-
ing Support Brake

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to ON. Additionally, if the object
becomes no longer in the traveling
direction of the vehicle or if the traveling
direction of the vehicle changes (such
as changing from moving forward to
backing up, or from backing up to mov-
ing forward), the system will be re-
enabled automatically.
■If “PKSB Unavailable” is displayed
on the multi-information display
and the PKSB OFF indicator is on
If the vehicle is stopped due to operation
of the Parking Support Brake, the Park-
ing Support Brake will be disabled and
the PKSB OFF indicator will illuminate.
●A sensor may be covered with water
drops, ice, snow, dirt, etc. Remove the
water drops, ice, snow, dirt, etc., from
the sensor to return the system to nor-
mal.
Also, due to ice forming on a sensor at
low temperatures, a warning message
may be displayed or the sensor may
not be able to detect an object. Once
the ice melts, the system will return to
normal.
●If this message is displayed, a sensor
on the front or rear bumper may be
dirty. Clean the sensors and their sur-
rounding area on the bumpers.
●If this message continues to be dis-
played even after cleaning the sensor,
or is displayed even though the sen-
sor is clean, have the vehicle
inspected by any authorized Toyota
retailer or Toyota authorized repairer,
or any reliable repairer.
●Initialization may not have been per-
formed after a battery terminal was
disconnected and reconnected. Initial-
ize the system. (→P.255)
If this message continues to be dis-
played even after initialization, have
the vehicle inspected by any autho-
rized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.
■If a battery terminal has been dis-
connected and reconnected
The system needs to be initialized. To initialize the system, drive the vehicle
straight ahead for 5 seconds or more at
a speed of approximately 35 km/h (22
mph) or more.

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4-5. Using the driving support systems
*: If equipped
This function will operate in situations such as the following if an object is
detected in the traveling direction of the vehicle.
■When traveling at a low speed and the brake pedal is not
depressed, or is depressed late
Parking Support Brake function (static objects)*
If the sensors detect a static object, such as a wall, in the traveling
direction of the vehicle and the system determines that a collision
may occur due to the vehicle suddenly moving forward due to an
accidental accelerator pedal operation, the vehicle moving the unin-
tended direction due to the wrong shift lever being selected, or
while parking or traveling at low speeds, the system will operate to
lessen the impact with the detected static object and reduce the
resulting damage.
Examples of function operation

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■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