sensor TOYOTA YARIS 2022 Service Manual

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4-5. Using the driving support systems
Driving
●If the vehicle cannot be driven in a
stable manner, such as when the vehicle has been in an accident or is malfunctioning
●When a tire chains, compact spare tire or an emergency tire puncture repair
kit is used
■Situations in which the system may operate even if there is no possibil-ity of a collision
In some situations, such as the follow- ing, the system may operate even though there is no possibility of a colli-
sion.
●When driving on a narrow road
●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 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 up or down a steep slope
●If a sensor is hit by a large amount of water, such as when driving on a
flooded road
●There is dirt, snow, water drops or ice
on a sensor. (Cleaning the sensors will resolve this problem.)
●A sensor is coated with a sheet of spray or heavy rain
●When driving in inclement weather such as fog, snow or a sandstorm
●When strong winds are blowing
●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 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
●The vehicle is approaching a tall or curved curb
●Driving close to columns (H-shaped steel beams, etc.) in multi-story park-
ing garages, construction sites, etc.
●If the vehicle cannot be driven in a
stable manner, such as when the vehicle has been in an accident or is malfunctioning
●On an extremely bumpy road, on an incline, on gravel, or on grass
●When a tire chains, compact spare tire or an emergency tire puncture repair
kit is used

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4-5. Using the driving support systems
■Detection range of the sensors
Approximately 100 cm (3.3 ft.)
Approximately 150 cm (4.9 ft.)
Approximately 60 cm (2.0 ft.)
The diagram shows the detection range
of the sensors. Note that the sensors
cannot detect objects that are
extremely close to the vehicle.
The range of the sensors may change
depending on the shape of the object,
etc.
■The distance and buzzer
*: Automatic buzzer mute function is enabled. ( P.258)
■Buzzer operation and dis-
tance to an object
A buzzer sounds when the sensors
are operating.
 The buzzer beeps faster as the
vehicle approaches an object.
When the vehicle comes within
approximately 30 cm (1.0 ft.) of
the object, the buzzer sounds
continuously.
 When 2 or more sensors simulta-
neously detect a static object,
the buzzer sounds for the near-
est object.
Sensor detection display,
object distance
Approximate distance to obstacleBuzzer
Front sensor:
100 cm to 60 cm (3.3 ft. to 2.0 ft.)*
Rear sensor:
150 cm to 60 cm (4.9 ft. to 2.0 ft.)*
Slow
60 cm to 45 cm (2.0 ft. to 1.5 ft.)*Medium
45 cm to 30 cm (1.5 ft. to 1.0 ft.)*Fast
30 cm to 15 cm (1.0 ft. to 0.5 ft.)ContinuousLess than 15 cm (0.5 ft.)

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4-5. Using the driving support systems
Driving
Even when the sensors are oper-
ating, the buzzer will be muted in
some situations. (automatic
buzzer mute function)
■Adjusting the buzzer volume
The buzzer volume can be adjusted
on the multi-information display.
Use the meter control switches to
change settings. ( P.104, 110)
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 and
hold .
3 Select the volume and then
press .
Each time the switch is pressed, the volume level will change between 1, 2, and 3.
■Muting a buzzer
A mute button will be displayed on
the multi-information display when
an object is detected. To mute the
buzzer, press .
The buzzers for the Toyota parking
assist-sensor and RCTA function (if
equipped) will be muted simultane-
ously.
Mute will be canceled automatically
in the following situations:
 When the shift lever is changed.
 When the vehicle speed exceeds
a certain speed.
 When there is a malfunction in a
sensor or the system is tempo-
rarily unavailable.
 When the operating function is
disabled manually.
 When the power switch is turned
off.

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4-5. Using the driving support systems
*: If equipped
Meter control switches
Turn the RCTA function on/off.
Outside rear view mirror indica-
tors
When a vehicle approaching from the
right or left at the rear of the vehicle is
detected, both outside rear view mirror
indicators will flash.
RCTA buzzer
If a vehicle approaching from the right
or left at the rear of the vehicle is
detected, a buzzer will sound.
Use the meter control switches to
turn on/off the function. ( P.104,
11 0 )
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 “RCTA” and then press
.
When the RCTA function is disabled,
the “RCTA OFF” indicator ( P.92) illu- minates. (Each time the power switch is turned off then changed to ON, the
RCTA function will be enabled automat- ically.)
■Outside rear view mirror indicator visibility
When under strong sunlight, the outside
RCTA (Rear Crossing
Traffic Alert)*
The RCTA function uses the
BSM radar sensors installed
on the inner side of the posi-
tion above the rear bumper.
This function is intended to
assist the driver in checking
areas that are not easily visible
when backing up.
WARNING
■Cautions regarding the use of the system
There is a limit to the degree of recog- nition accuracy and control perfor-mance that this system can provide,
do not overly rely on this system. The driver is always responsible for paying attention to the vehicle’s surroundings
and driving safely. ( P.248)
■To ensure the system can oper-
ate properly
 P. 2 4 9
System components
Turning the RCTA function
on/off

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4-5. Using the driving support systems
Driving
rear view mirror indicator may be difficult
to see.
■Hearing the RCTA buzzer
The RCTA buzzer may be difficult to hear over loud noises, such as high
audio system volume.
■When “Rear Cross Traffic Alert Unavailable See Owner’s Manual” is shown on the multi-information
display
The sensor voltage has become abnor- mal, or water, snow, mud, etc., may be
built up in the vicinity of the sensor area of the position above the rear bumper. ( P.249) Removing the water, snow,
mud, etc., from the vicinity of the sensor area should return it to normal. Also, the sensor may not function normally when
used in extremely hot or cold weather.
■When “Rear Cross Traffic Alert Mal- function Visit Your Dealer” is shown on the multi-information
display
There may be a sensor malfunction or misaligned. Have the vehicle inspected
by any authorized Toyota retailer or Toyota authorized repairer, or any reli-able repairer.
■Radar sensors
 P. 2 4 9
■Operation of the RCTA func-
tion
The RCTA function uses radar sen-
sors to detect vehicles approaching
from the right or left at the rear of
the vehicle and alerts the driver of
the presence of such vehicles by
flashing the outside rear view mirror
indicators and sounding a buzzer.
Approaching vehicles
Detection areas of approaching
vehicles
■RCTA function detection areas
The areas that vehicles can be
detected in are outlined below.
The buzzer can ale rt for faster vehi-
cles approaching from farther away.
Example:
RCTA function
Approach-
ing vehicleSpeed
A pp r ox i -
mate
alert dis-
tance
Fast28 km/h (17
mph)20 m (66 ft.)
Slow8 km/h (5
mph)5.5 m (18 ft.)

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4-5. Using the driving support systems
■The RCTA function is operational when
The RCTA function operates when all of the following conditions are met:
●The RCTA function is on.
●The shift lever is in R.
●The vehicle speed is less than approximately 8 km/h (5 mph).
●The approaching vehicle speed is between approximately 8 km/h (5
mph) and 28 km/h (17 mph).
■Adjusting the buzzer volume
The buzzer volume can be adjusted on the multi-information display.
Use the meter control switches to change settings. ( P.104, 110)
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
“RCTA” and then press and hold
.
3 Press to select the volume.
Each time the switch is pressed, the vol- ume level will change between 1, 2, and
3.
When the buzzer volume adjustment is
completed, press to return to the
previous screen.
■Muting a buzzer temporarily
A mute button will be displayed on the
multi-information display when a vehi-
cles or an object is detected. To mute
the buzzer, press .
The buzzers for the RCTA function and
Toyota parking assist-sensor will be
muted simultaneously.
Mute will be canceled automatically in
the following situations:
●When the shift lever is changed.
●When the vehicle speed exceeds a certain speed.
●When there is a malfunction in a sen-sor or the system is temporarily
unavailable.
●When the operating function is dis-
abled manually.
●When the power switch is turned off.
■Conditions under which the system
will not detect a vehicle
The RCTA function is not designed to detect the following types of vehicles
and/or objects.
●Vehicles approaching from directly
behind
●Vehicles backing up in a parking
space next to your vehicle
●Vehicles that the sensors cannot
detect due to obstructions
●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*
●The distance between the sensor and approaching vehicle gets too close*: Depending on conditions, detection of
a vehicle and/or object may occur.

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4-5. Using the driving support systems
Driving
■Situations in which the system may
not operate properly
The RCTA function may not detect vehi- cles correctly in the following situations:
●When the sensor is misaligned due to a strong impact to the sensor or its
surrounding area
●When mud, snow, ice, a sticker, etc.,
is covering the sensor or surrounding area on the position above the rear bumper
●When driving on a road surface that is wet with standing water during bad
weather, such as heavy rain, snow, or fog
●When multiple vehicles are approach-ing with only a small gap between each vehicle
●When a vehicle is approaching at high speed
●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
●When backing up on a slope with a sharp change in grade
●When backing out of a sharp angle parking spot
●When towing a trailer
●When there is a significant difference in height between your vehicle and
the vehicle that enters the detection area
●When a sensor or the area around a sensor is extremely hot or cold
●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
●When turning while backing up
●When a vehicle turns into the detec-tion area
■Situations in which the system may operate even if there is no possibil-ity of a collision
Instances of the RCTA function unnec- essary detecting a vehicle and/or object may increase in the following situations:

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4-5. Using the driving support systems
●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, sigh, or parked vehicle,
which may reflect electrical waves toward the rear of the vehicle, is short
●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
●When a vehicle passes by the side of your vehicle
●When a detected vehicle turns while approaching the vehicle
●When there are spinning objects near
your vehicle such as the fan of an air conditioning unit
●When water is splashed or sprayed toward the rear bumper, such as from a sprinkler
●Moving objects (flags, exhaust fumes, large rain droplets or snowflakes, rain
water on the road surface, etc.)
●When the distance between your vehi-
cle and a guardrail, wall, etc., that enters the detection area is short
●Gratings and gutters
●When a sensor or the area around a
sensor is extremely hot or cold
●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

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4-5. Using the driving support systems
Driving
*: If equipped
■Parking Support Brake func-
tion (static objects)
 P. 2 7 0
■Parking Support Brake func-
tion (rear-crossing vehicles)
 P. 2 7 3
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 the possibility
of a collision with a detected
object is high, a warning oper-
ates 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 automatically
applied to help avoid the colli-
sion or help reduce the impact
of the collision.
PKSB (Parking Support
Brake) system
WARNING
■Cautions regarding the use of the 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.
●It is extremely dangerous to check the system operations by intention-
ally driving the vehicle into the direction of a wall, etc. Never attempt such actions.
■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

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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.104, 110)
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
●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 automatic car washing
devices
●If the vehicle cannot be driven in a
stable manner, such as when the vehicle has been in an accident or is malfunctioning
●When the vehicle is driven in a sporty manner or off-road
●When the tires are not properly inflated
●When the tires are very worn
●When a tire chains, compact spare tire or an emergency tire puncture repair kit is used
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 power 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 is not return to normal after driving for a while, clean the sensors and their surrounding
area on the bumpers.)
Enabling/Disabling the Park-
ing Support Brake