sensor TOYOTA C-HR 2023 Workshop Manual

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■The system can be operated when
● The power switch is in ON mode.
● Toyota parking assist-sensor function is on.
● The vehicle speed is less than about 10 km/h (6 mph).
● A shift lever other than P is selected.
● Vehicles with side sensors: Steering wheel is turned approximately 90° or
more
■ If “Parking assist unavailable. Clean parking assist sensor” is displayed
on the multi-information display
A sensor may be covered with ice, snow, dirt, etc. Remove the i ce, snow, dirt,
etc., from the sensor to return the system to normal.
Also, due to ice forming on a sensor at low temperatures, a war ning message
may be displayed or the sensor may not be able to detect an obj ect. Once the
ice melts, the system will return to normal.
■ If “Parking assist Malfunction Visit your dealer” is displayed on the
multi-information display
The system may not operate due to the malfunction of a sensor.
Have the vehicle inspected by any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.
■ Sensor detection information
The following situations may occur during use.
● The sensors may be able to only detect objects near the front and rear bum-
pers.
● Depending on the shape of the object and other factors, the detection dis-
tance may shorten, or detection may be impossible.
● If an object is extremely close to a sensor, it may not be detected.
● There will be a short delay between object detection and display. Even at
low speeds, there is a possibility that the object will come wi thin the sensor’s
detection areas before the display is shown and the warning bee p 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.

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■ Objects which the system may not be properly detected
The shape of the object may prevent the sensor from detecting i t. Pay partic-
ular 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 projecting outwards in the direction of your
vehicle
People may not be detected if they are wearing certain types of clothing.
■ Object warning function (vehicles with side sensors)
■ Obstacle detection in side areas (vehicles with side sensors)
● Objects in the side areas are detected while driving by scanning the side
areas with the side sensors. Recognized objects are retained in memory for
up to approximately 2 minutes.
● Objects may not be detected in the side areas until the scan completes.
After the power switch is turned to ON mode, scanning completes after driv-
ing the vehicle for a short period of time.
● When an object such as another vehicle, pedestrian or animal is detected
by the side sensors, the object may continue to be detected eve n after it has
left the side sensor detection area.
■ Situations in which the system may not operate properly
Certain vehicle conditions and the surrounding environment may affect the
ability of a sensor to correctly detect objects. Particular ins tances where this
may occur are listed below.
● There is dirt, snow 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 di splay may be dis-
played abnormally, or objects, such as a wall, may not be detec ted.
When an object in the side areas is within
the vehicle course while the vehicle is
moving forward or backward, this function
inform the driver by the display and the
buzzer.
Object
Calculated vehicle course

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● On an extremely bumpy road, on an incline, on gravel, or on grass.
● When vehicle horns, vehicle detectors, 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.
● When a pedestrian is wearing clothing that does not reflect ultrasonic waves
(ex. skirts with gathers or frills).
● When objects that are not perpendicular to the ground, not perpendicular to
the vehicle traveling direction, uneven, or waving are in the d etection 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, motorcycle, 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 additional trim strip, etc.), bicy cle 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
● When a sensor or the area around a
sensor is extremely hot or cold.

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■ Situations in which the system may operate even if there is no possibil-
ity of a collision
In some situations, such as the following, the system may opera te even
though there is no possibility of a collision.
● When driving toward a banner, flag, low-hanging branch or boom barrier
(such as those used at railroad crossings, toll gates and parki ng lots)
● When there is a rut or hole in the surface of the road
● When driving on a metal cover (grating), 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 vehicle horns, vehicle detectors, 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
● When driving on a narrow road
●When strong winds are blowing

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WARNING
■Cautions regarding the use of the system
There is a limit to the degree of recognition accuracy and cont rol perfor-
mance that this system can provide, do not overly rely on this system. The
driver is always responsible for paying attention to the vehicl e’ surroundings
and driving safely.
■ To ensure the system can operate properly
Observe the following precautions.
Failing to do so may result in the vehicle being unable to be d riven safely
and possibly cause an accident.
● Do not damage the sensors, and always keep them clean.
● Do not attach a sticker or install an electronic component, such as a backlit
license plate (especially fluorescent type), fog lights, fender pole or wire-
less antenna near a radar sensor.
● Do not subject the surrounding area of the sensor to a strong impact. If
subjected to an impact, have the vehicle inspected by any autho rized
Toyota retailer or Toyota authorized repairer, or any reliable repairer. If the
front or rear bumper needs to be removed/installed or replaced, contact
any authorized Toyota retailer or Toyota authorized repairer, o r any reliable
repairer.
● Do not modify, disassemble or paint the sensors.
● Do not attach a license plate cover.
● Keep your tires properly inflated.
■ When to disable the function
In the following situations, disable the function as it may ope rate even
though there is no possibility of a collision.
● Failing to observe the warnings above.
● A non-genuine Toyota suspension (lowered suspension, etc.) is installed.

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WARNING
■Side sensors (if equipped)
In the following situations, the clearance sonar may not operat e normally
and may result in an unexpected accident. Drive carefully.
● Objects may not be detected in the side areas until the vehicle is driven for
a short time and a scan of the side areas is completed. ( P. 461)
● Even after the scan of the side areas is completed, objects such as other
vehicles, people or animals that approach from the sides cannot be
detected.
● Even after the scan of the side areas is completed, objects may not be
detected depending on the surrounding situation of the vehicle.
At that time, the side sensor displays ( P. 455) temporary turn off.
■ Notes when washing the vehicle
Do not apply intensive bursts of water or steam to the sensor a rea.
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 malfunction.
● 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.

467
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RCTA (Rear Crossing Traffic Aler t)
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.
Outside rear view mirror indicators
When a vehicle approaching from the right or left at the rear o f the vehicle
is detected, both outside rear view mirror indicators flash.
RCTA buzzer
If a vehicle approaching from the right or left at the rear of the vehicle is
detected, a buzzer will sound. The buzzer also sounds for appro ximately
1 second immediately after the RCTA function is turned on.
“RCTA OFF” indicator
Illuminates when the Rear Cross ing Traffic Alert is disabled.
: If equipped
Summary of the Rear Crossing Traffic Alert

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Press “” or “” of the meter control switches, select .
Press “ ” or “” of the meter control switches, select .
Press “ ” or “” of the meter control switches, select “RCTA”.
When the RCTA function is disabled, the “RCTA OFF” indicator (P. 467)
illuminates. (Each time the power switch is turned off and then changed to
ON mode, the RCTA function will be enabled automatically.)
■ The outside rear view mirror indicators visibility
When under strong sunlight, the out side rear view mirror indicator may be dif-
ficult 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 “RCTA Unavailable.” is shown on the multi-information display
Water, snow mud, etc., may be built up in the vicinity of the s ensor area of
bumper ( P. 448).
Removing the water, snow, mud, etc., from the vicinity of the s ensor area
bumper should return it to normal.
Also, the sensor may not function normally when used in extreme ly hot or
cold weather.
■ When “RCTA Malfunction Visit Your Dealer.” is shown on the multi-infor-
mation display
There may be a sensor malfunction or misaligned. Have the vehic le
inspected by any authorized Toyota retailer or Toyota authorize d repairer, or
any reliable repairer.
■ Rear side radar sensors
 P. 448
Turning the RCTA function on/off
1
2
3

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The RCTA functions when your vehicle is in reverse. It can detect
other vehicles approaching from the right or left rear of the v ehicle. It
uses radar sensors to alert the driver of the other vehicle’s e xistence
through flashing the outside rear view mirror indicators and so unding
a buzzer.
RCTA function
Approaching vehicles Detection areas
WARNING
■ Cautions regarding the use of the system
There is a limit to the degree of recognition accuracy and cont rol perfor-
mance that this system can provide, do not overly rely on this system. The
driver is always responsible for paying attention to the vehicl e’s surround-
ings and driving safely. (P. 451)
■ To ensure the system can operate properly
P. 448

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■ Muting a buzzer
 P. 459
■ 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
● Guardrails, walls, signs, parked vehicles and similar stationary objects*
●Small motorcycles, bicycles, pedestrians, etc.*
●Vehicles moving away from your vehicle
● Vehicles approaching from the parking spaces next to your vehicle*
●The distance between the sensor and approaching vehicle gets too close
*: Depending on the conditions, detection of a vehicle and/or object may
occur.
● Vehicles that the sensors cannot detect
due to obstructions