sensor TOYOTA PRIUS PRIME 2021 (in English) Service Manual

PRIUS PRIME_OM_OM47D71U_(U)
4495-5. Using the driving support systems
5
Driving
Approximately 3.3 ft. (100 cm)
Approximately 4.9 ft. (150 cm)
Approximately 2.0 ft. (60 cm)
Approximately 3.3 ft. (100 cm)
• The detection range is shown in
the illustration to the right. How-
ever, the sensor will not detect
the obstacle if it is too close.
• For details regarding obstacle
detection in the side areas.
(P. 450)
• The distance at which an obsta-
cle can be detected and whether
it can be detected depends on
the shape and condition of the
obstacle.
The obstacle detection range can be changed. (P. 7 5 3 )
■Operation conditions
The power switch is turned on.
●Front corner sensors:
• Shift position is not in P
• Vehicle speed is approximately 6 mph (10 km/h) or less
●Front side sensors/rear side sensors:
• Shift position is not in P
• Vehicle speed is approximately 6 mph (10 km/h) or less
• Steering wheel is turned approximately 90 or more
●Front center sensors:
• Shift position is not in P or R
• Vehicle speed is approximately 6 mph (10 km/h) or less
●Rear corner sensors/rear center sensors:
Shift position is in R
■Intuitive parking assist pop-up display
P. 471
Detection range of the sensors
1
2
3
4

450
PRIUS PRIME_OM_OM47D71U_(U)
5-5. Using the driving support systems
■Sensor detection information
●The sensor’s detection areas are limited to the areas around the vehicle’s
bumper.
●Depending on the shape of the obstacle and other factors, the detection dis-
tance may shorten, or detection may be impossible.
●<003200450056005700440046004f00480056000300500044005c00030051005200570003004500480003004700480057004800460057004800470003004c004900030057004b0048005c0003004400550048000300570052005200030046004f0052005600
4800030057005200030057004b004800030056004800510056[or.
●There will be a short delay between obstacle detection and display. Even
when traveling at a low speed, if you come too close to an obstacle before
the display and buzzer activate, the display and buzzer may not activate at
all.
●Thin posts or objects lower than the sensor may not be detected when
approached, even if they have been detected once.
●It might be difficult to hear beeps due to the volume of audio system or air
flow noise of the air conditioning system.
■Obstacle warning function
When an obstacle 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. (P. 447, 448)
■Obstacle detection in side areas
●Obstacles in the side areas are detected while driving by scanning the side
areas with the side sensors. Recognized obstacles are retained in memory
for up to approximately 2 minutes.
●Obstacles may not be detected in the side areas until the scan completes.
After the power switch is turned on, scanning completes after driving the
vehicle for a short period of time.
●When an obstacle such as another vehicle, pedestrian or animal is detected
by the side sensors, the obstacle may continue to be detected even after it
has left the side sensor detection area. Obstacle
Calculated vehicle course
1
2

PRIUS PRIME_OM_OM47D71U_(U)
4515-5. Using the driving support systems
5
Driving
■If “Clean Parking Assist Sensor” is displayed on the multi-information
display
A sensor may be dirty or covered with snow or ice. In such cases, if it is
removed from the sensor, the system should return to normal.
Also, due to the sensor being frozen at low temperatures, a malfunction dis-
play may appear or an obstacle may not be detected. If the sensor thaws out,
the system should return to normal.
■If “Parking Assist Malfunction” is displayed on the multi-information dis-
play
Depending on the malfunction of the sensor, the device may not be working
normally. Have the vehicle inspected by your Toyota dealer.
■Certification (Canada only)
This ISM device complies with Canadian ICES-001.
■Customization
Settings (e.g. buzzer volume) can be changed.
(Customizable features: P. 753)
WARNING
■When using intuitive parking assist
Observe the following precautions to avoid an unexpected accident.
●Do not exceed the speed limit of 6 mph (10 km/h).
●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.

452
PRIUS PRIME_OM_OM47D71U_(U)
5-5. Using the driving support systems
WARNING
■Sensors
Certain vehicle conditions and the surrounding environment may affect the
ability of the sensor to correctly detect obstacles. Particular instances where
this may occur are listed below.
●There is dirt, snow or ice on the sensor. (Wiping the sensors will resolve
this problem.)
●The sensor is frozen. (Thawing the area will resolve this problem.)
In especially cold weather, if a sensor is frozen, the screen may show an
abnormal display, or obstacles may not be detected.
●The sensor is covered in any way.
●In harsh sunlight or intense cold weather
●<0032005100030044005100030048005b00570055004800500048004f005c00030045005800500053005c00030055005200440047000f0003005200510003004400510003004c00510046004f004c00510048000f0003005200510003004a00550044005900
48004f000f0003005200550003005200510003004a00550044[ss
●The vicinity of the vehicle is noisy due to vehicle horns, motorcycle
engines, air brakes of large vehicles, or other loud noises producing ultra-
sonic waves.
●<0037004b004800030056004800510056005200550003004c0056000300560053004f00440056004b004800470003005a004c0057004b0003005a0044005700480055000300520055000300470055004800510046004b004800470003005a004c0057004b00
03004b004800440059005c000300550044004c00510011[
●The sensor is drenched with water on a flooded road.
●The vehicle is leaning considerably to one side.
●The vehicle is equipped with a fender pole or wireless antenna.
●The vehicle is approaching a tall or curved curb.
●The area directly under the bumpers is not detected.
●If obstacles draw too close to the sensor.
●The bumper or sensor receives a strong impact.
●A non-genuine Toyota suspension (lowered suspension etc.) is installed.
●There is another vehicle equipped with parking assist sensors in the vicin-
ity.
●Towing eyelets are installed.
●A backlit license plate is installed.
In addition to the examples above, depending on the shape and condition of
obstacles, detection may not be possible, or the detection range may be
shortened.

PRIUS PRIME_OM_OM47D71U_(U)
4535-5. Using the driving support systems
5
Driving
WARNING
■Side sensors
In the following situations, the intuitive parking assist may not operate nor-
mally and may result in an unexpected accident. Drive carefully.
●Obstacles 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. 450)
●Even after the scan of the side areas is completed, obstacles 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, obstacles may not be
detected depending on the surrounding situation of the vehicle.
At that time, the side sensor operation displays (P. 446) temporary turn
off.
■Obstacles which may not be properly detected
The shape of the obstacle may prevent the sensor from detecting it. Pay
particular attention to the following obstacles:
●Wires, fences, ropes, etc.
●<002600520057005700520051000f0003005600510052005a0003004400510047000300520057004b00480055000300500044005700480055004c0044004f005600030057004b00440057000300440045005600520055004500030056005200580051004700
03005a0044005900480056[
●Sharply-angled objects
●Low obstacles
●Tall obstacles with upper sections projecting outwards in the direction of
your vehicle
●<0033004800520053004f0048000300500044005c00030051005200570003004500480003004700480057004800460057004800470003004c004900030057004b0048005c00030044005500480003005a004800440055004c0051004a000300460048005500
570044004c005100030057005c005300480056000300520049[ clothing.
●Moving objects such as people or animals

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PRIUS PRIME_OM_OM47D71U_(U)
5-5. Using the driving support systems
NOTICE
■When using intuitive parking assist
In the following situations, the system may not function correctly due to a
sensor malfunction etc. Have the vehicle checked by your Toyota dealer.
●Intuitive parking assist operation display flashes, and a beep sounds when
no obstacles are detected.
●If the area around a sensor collides with something, or is subjected to
strong impact.
●If the bumper collides with something.
●If the display shows up and remains on without a beep.
●If a display error occurs, first check the sensor.
If the error occurs even when there is no ice, snow or mud on the sensor, it
is likely that the sensor is malfunctioning.
■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 steam to wash the vehicle, do not direct steam too close to
the sensors. The sensors may not function properly if subjected to steam.

455
PRIUS PRIME_OM_OM47D71U_(U)
5-5. Using the driving support systems
5
Driving
Parking Suppor t Brake function
The system operates in the following situations when an obstacle is
detected in the traveling direction of the vehicle.
◆The vehicle is driven at low speeds and the brake pedal is not
depressed, or is depressed too late
◆The accelerator pedal is depressed too far
: If equipped
When a collision may occur with an obstacle while parking or
traveling at low speeds, when the vehicle suddenly moves for-
ward due to mistaken accelerator pedal operation, or when the
vehicle moves due to the wrong shift position being selected,
the sensors detect obstacles to the front or rear in the traveling
direction of the vehicle, and the system operates to lessen
impact with obstacles such as walls, and reduce resulting dam-
age.
Examples of system operation

456
PRIUS PRIME_OM_OM47D71U_(U)
5-5. Using the driving support systems
◆The vehicle moves due to the wrong shift position being
selected
Front corner sensors
Front center sensors
Rear corner sensors
Rear center sensors
The Parking Support Brake function can be enabled/disabled on the
screen (P. 246) of the multi-information display.
When the Parking Support Brake
function is off, the PKSB OFF indi-
cator illuminates.
When the Parking Support Brake function is switched off, system operation
does not resume until the function is switched back on through the
screen on the multi-information display. (System operation does not
resume by operating the power switch.)
Types of sensors
1
2
3
4
Changing settings of the Parking Support Brake function

PRIUS PRIME_OM_OM47D71U_(U)
4615-5. Using the driving support systems
5
Driving
■Sensor detection range
The detection range of the Parking Support Brake function differs from the
detection range of the intuitive parking assist. (P. 449)
Therefore, even if the intuitive parking assist detects an obstacle and pro-
vides a warning, the Parking Support Brake function may not start operating.
■System operation
When the vehicle is stopped by system operation, the Parking Support Brake
function stops and the PKSB OFF indicator illuminates.
■System recovery
When the Parking Support Brake function is stopped by system operation
and you would like to resume operation, either turn the Parking Support
Brake function on again (P. 456), or turn the power switch off and then back
on. Furthermore, when the vehicle moves with an obstacle no longer in the
traveling direction of the vehicle, or when the traveling direction of the vehicle
changes (such as when switching from moving forward to backing up, and
vice versa), system operation automatically resumes.
■Obstacles not detected by the sensors
The following obstacles may not be detected by the sensors.
●Objects such as people, cloth and snow, that are difficult for sonic waves to
reflect off of. (In particular, people may also not be detected depending on
the type of clothing they are wearing.)
●Objects not perpendicular with the ground, objects not at a right angle to the
traveling direction of the vehicle, uneven objects or waving objects
●Low objects
●Thin objects such as wires, fences, ropes and signposts
●Objects that are extremely close to the bumper
■Intuitive parking assist buzzer
Regardless of whether the intuitive parking assist is on or off (P. 445), if the
Parking Support Brake function is not stopped (P. 456), when the front or
rear sensors detect an obstacle and brake control is performed, the intuitive
parking assist buzzer also sounds and a notification of the approximate dis-
tance to the obstacle is provided.

462
PRIUS PRIME_OM_OM47D71U_(U)
5-5. Using the driving support systems
■Situations when the system may operate even though there is no possi-
bility of a collision
In the following situations, the system may operate even though there is no
possibility of a collision.
●Environmental influence
• The vehicle is driven toward a banner or flag, a low-hanging branch or a
boom barrier (such as those used at railroad crossings, toll gates and
parking lots).
• There is an obstacle on the shoulder of the road (when the vehicle is
driven in a narrow tunnel, on a narrow bridge or on a narrow road)
• The vehicle is being parallel parked
• There is a rut or hole in the surface of the road
• When the vehicle is driven on a metal cover (grating), such as those used
for drainage ditches
• The vehicle is driven on a steep slope
• The sensor is covered by water on a flooded road
●Influence from the weather
• Ice, snow, dirt, etc., has adhered to the sensor (if removed, the system
returns to normal)
• Heavy rain or water strikes the vehicle
• In severe weather such as fog, snow or a sand storm
●Influence from other sonic waves
• An ultrasonic wave source is nearby, such as the horn or parking assist
sensors of another vehicle, a vehicle detector, a motorcycle engine or the
air brake of a large vehicle
• Electronic components (such as a backlit license plate (especially fluo-
rescent types), fog lights, a fender pole or a wireless antenna) are
installed near the sensors • The vehicle is driven on a narrow
road
• The vehicle is driven on a gravel road
or in an area with tall grass