sensor TOYOTA GR YARIS 2023 Service Manual

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Driving
●Sharply-angled objects
●Low objects
●Tall objects with upper sections pro- jecting outwards in the direction of your vehicle
■Situations in which the system may
not operate properly
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.
●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.
●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
●A sensor is coated with a sheet of spray or heavy rain.
●If objects draw too close to the sensor.
●Pedestrians that are hard to reflect ultrasonic waves (ex. skirts with gath-ers or frills).
●When objects that are not perpendicu-
lar to the ground, not perpendicular to
the vehicle traveling direction, uneven, or waving are in the detection range.
●Strong wind is blowing
●When driving in inclement weather such as fog, snow or a sandstorm
●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
●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 towing
eyelet, bumper protector (an addi- tional trim strip, etc.), bicycle carrier, or snow plow
●If the front of the vehicle is raised or lowered due to the carried load
●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

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●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
■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
Sensor detection display,
object distance

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Driving
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.209)
■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 objects are
detected simultaneously, the
buzzer sounds for the nearest
object.
 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. 8 5 )
1 Press / of the meter con-
trol switch to select .
2 Press / of the meter con-
trol 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
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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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 engine switch is turned
off.
*: If equipped
Meter control switches
Turning the RCTA function on/off.
RCTA (Rear Crossing
Traffic Alert)*
The RCTA function uses the
BSM rear side radar sensors
installed behind 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.199)
■To ensure the system can oper-
ate properly
 P. 2 0 0
System components

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Driving
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.85)
1 Press / of the meter con-
trol switch to select .
2 Press / of the meter con-
trol switch to select “RCTA” and
then press .
When the RCTA function is disabled, the RCTA OFF indicator ( P.79) illumi- nates. (Each time the engine 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 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 if the
audio system volume is high.
■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.200)
Removing the water, snow, mud, etc.,
from the vicinity of the sensor area should return it to normal. Also, the sen-sor 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 of misaligned. Have the vehicle inspected
by any authorized Toyota retailer or Toyota authorized repairer, or any reli-able repairer.
■Rear side radar sensors
 P. 2 0 0
■Operation of the RCTA func-
tion
The RCTA function uses rear side
radar sensors 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.
Turning the RCTA function
on/off
RCTA function

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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 alert the driver of
faster vehicles approaching from
farther away.
Example:
■The RCTA function is operational when
The RCTA function operates when all of the following conditions are met:
●The engine switch is in ON.
●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 (18 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.85)
1 Press / of the meter control
switch to select .
2 Press / of the meter control
switch to select “RCTA” and then
press and hold .
3 Select the volume and then press
.
Each time the switch is pressed, the vol- ume level will change between 1, 2 and 3.
■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 Toyota parking
assist-sensor and RCTA function will be
muted simultaneously.
Mute will be canceled automatically in the following situations:
●When the shift lever is changed.
Approaching vehi-
cle speed
A pp r ox i ma te
alert distance
28 km/h (18 mph)
(fast)20 m (65 ft.)
8 km/h (5 mph)
(slow)5.5 m (18 ft.)

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Driving
●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 engine 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 the conditions, detec-
tion of a vehicle and/or object may
occur.
■Conditions under which the system may not function correctly
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

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●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:
●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

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Driving
●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
1 Normal mode
Provides an optimal balance of
dynamic performance. Suitable for city
driving.
Press the switch to change the driving
mode to normal mode when not in nor-
mal mode.
2 Sport mode
Controls the driving force to distribute
more to the rear wheels, allowing the
vehicle to behave more crispy by steer-
ing wheel operation.
3 Track mode
Equally distributes the driving force
among the 4 wheels, maximizing the
Active Torque Split AWD system. Suit-
able for driving on racing circuits.
■Automatic deactivation of sport mode and track mode
If the engine switch is turned off after
AWD mode select switch
The following modes can be
selected to suit the driving and
road conditions by controlling
the drive force to the front and
rear wheels.
Selecting the driving mode

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■TRC (Traction Control)
Helps to maintain drive power and
prevent the drive wheels from spin-
ning when starting the vehicle or
accelerating on slippery roads
■Hill-start assist control
Helps to reduce the backward
movement of the vehicle when
starting on an uphill
■EPS (Electric Power Steering)
Employs an electric motor to
reduce the amount of effort needed
to turn the steering wheel.
■Active Torque Split AWD sys-
tem
Automatically switches from front-
wheel drive to all-wheel drive
(AWD) according to the driving con-
ditions, helping to ensure reliable
handling and stability. Examples of
conditions where the system will
switch to AWD are when cornering,
going uphill, starting off or acceler-
ating, and when the road surface is
slippery due to snow, rain, etc.
■Emergency brake signal
When the brakes are applied sud-
denly, the emergency flashers auto-
matically flash to alert the vehicle
behind.
■The secondary Collision Brake
(if equipped)
When the SRS airbag sensor
detects a collision and the system
operates, the brakes and brake
lights are automatically controlled
to reduce the vehicle speed and
help reduce the possibility of further
damage due to a secondary colli-
sion.
■When the TRC/VSC systems are operating
The slip indicator light will flash while the
TRC/VSC systems are operating.
■Disabling the TRC system
If the vehicle gets stuck in mud, dirt or
snow, the TRC system may reduce
power from the engine to the wheels.
Pressing to turn the system off may
make it easier for you to rock the vehicle
in order to free it.
To turn the TRC system off, quickly
press and release .
The “TRC OFF” indicator light will come
on.
Press again to turn the system
back on.
■Turning off both TRC and VSC sys-
tems
To turn the TRC and VSC systems off,