brake sensor TOYOTA PRIUS PLUG-IN HYBRID 2022 User Guide

4595-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
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Driving
QSituations 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.
O 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)
O When there is a rut or hole in the surface of the road
O When driving on a metal cover (grating), such as those used for drainage
ditches
O When driving up or down a steep slope
O If a sensor is hit by a large amount of water, such as when driving on a
flooded road
O There is dirt, snow, water drops or ice on a sensor. (Cleaning the sensors
will resolve this problem.)
O A sensor is coated with a sheet of spray or heavy rain
O When driving in inclement weather such as fog, snow or a sandstorm
O 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
O If the front of the vehicle is raised or lowered due to the carried load
O If the orientation of a sensor has been changed due to a collision or other
impact
O Driving close to columns (H-shaped steel beams, etc.) in multi-story parking
garages, construction sites, etc.
O If the vehicle cannot be driven in a stable manner, such as when the vehicle
has been in an accident or is malfunctioning
O When driving on a narrow road
O When strong winds are blowing

4625-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
Parking Support Brake function
The system operates in the following situations when an obstacle is
detected in the traveling direction of the vehicle.
XThe vehicle is driven at low speeds and the brake pedal is not
depressed, or is depressed too late
XThe 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 travel ing
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

4645-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
Front corner sensors
Front center sensors
Rear corner sensors
Rear center sensors
The Parking Support Brake function can be enabled/disabled on t he
screen ( P. 247) 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
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2
3
4
Changing settings of the Parking Support Brake function

4695-5. Using the driving support systems
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Driving
QSensor detection range
The detection range of the Parking Support Brake function differs from the
detection range of the Toyota parking assist-sensor. (P. 455)
Therefore, even if the Toyota parking assist-sensor detects an obstacle and
provides a warning, the Parking Support Brake function may not start operat-
ing.
QSystem operation
When the vehicle is stopped by system operation, the Parking Support Brake
function stops and the PKSB OFF indicator illuminates.
QSystem 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. 464), 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.
QObstacles not detected by the sensors
The following obstacles may not be detected by the sensors.
OObjects 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.)
OObjects not perpendicular with the ground, objects not at a right angle to the
traveling direction of the vehicle, uneven objects or waving objects
OLow objects
OThin objects such as wires, fences, ropes and signposts
OObjects that are extremely close to the bumper
QSituations in which the system may not operate properly
P. 457
QSituations in which the system may operate even if there is no possibil-
ity of a collision
P. 459
QIn the unlikely event that the Parking Support Brake function mistakenly
operates at a crossing or elsewhere
Even in the unlikely event that the Parking Support Brake function mistakenly
operates at a crossing or elsewhere, brake control is canceled after approxi-
mately 2 seconds, allowing you to proceed forward and leave the area. Fur-
thermore, brake control is also canceled when the brake pedal is depressed.
Depressing the accelerator pedal again allows you to proceed forward and
leave the area.

4705-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
Q When removing and installing the 12-volt battery
The system needs to be initialized.
The system can be initialized by driving the vehicle straight a head for 5 sec-
onds or more at a speed of approximately 35 km/h (22 mph) or hi gher.
Q When “PKSB Unavailable” is displayed on the multi-information display
and the PKSB OFF indicator flashes
O Ice, snow, dirt, etc., may have adhered to the sensor. If this occurs, remove
the ice, snow, dirt, etc., from the sensor to return the system to normal.
Also, a warning message may be displayed at low temperatures du e to ice
forming on the sensor, and the sensor may not detect obstacles. Once the
ice melts, the system will return to normal.
O If this message is shown even after removing dirt from the sensor, or shown
when the sensor was not dirty to begin with, have the vehicle i nspected at
any authorized Toyota retailer or Toyota authorized repairer, o r any reliable
repairer.
Q When “PKSB Malfunction Visit Your Dealer” is displayed on the multi-
information display, the PKSB OFF indicator flashes and the buz zer
sounds
The system may not be operating properly. Have the vehicle insp ected at any
authorized Toyota retailer or Toyota authorized repairer, or an y reliable
repairer.
WARNING
Q Cautions regarding the use of the system
Do not rely solely upon the system. Relying solely upon the sys tem may
lead to an unexpected accident.
O Driving safely is the sole responsibility of the driver. Pay careful attention
to the surrounding conditions in order to ensure safe driving. The Parking
Support Brake function can provide support to lessen the severi ty of colli-
sions. However, it may not operate depending on the situation.
O The Parking Support Brake function is not a system designed to com-
pletely stop the vehicle. Furthermore, even if the Parking Supp ort Brake
function is able to stop the vehicle, brake control is canceled after approxi-
mately 2 seconds, so depress the brake pedal immediately.
O It is extremely dangerous to check the system operations by intentionally
driving the vehicle into the direction of a wall, etc. Never at tempt such
actions.

4715-5. Using the driving support systems
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Driving
WARNING
QWhen to disable the Parking Support Brake
In the following situations, disable the Parking Support Brake as the system
may operate even though there is no possibility of a collision.
O When inspecting the vehicle using a chassis roller, chassis dynamo or free
roller
O When loading the vehicle onto a boat, truck or other transport vessel
O If the suspension has been modified or tires of a size other than specified
are installed
O If the front of the vehicle is raised or lowered due to the carried load
O 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
O When using automatic car washing devices
O If the vehicle cannot be driven in a stable manner, such as when the vehi-
cle has been in an accident or is malfunctioning
O When the vehicle is driven in a sporty manner or off-road
O When the tires are not properly inflated
O When the tires are very worn
O When tire chains, compact spare tire or an emergency tire puncture repair
kit are used
Q To ensure the system can operate properly
 P. 4 6 0
Q Handling the suspension
Do not modify the suspension, as changes to the height or incli ne of the
vehicle may prevent the sensors from correctly detecting obstac les, may
cause the system not operate, or may cause the system to operat e unnec-
essarily.
Q If the Parking Support Brake function (static objects) operates unnec-
essarily, such as at a railroad crossing
 P. 4 6 9
Q Notes when washing the vehicle
 P. 4 6 1

4775-5. Using the driving support systems
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Driving
The guidance screen is displayed on the multi-information display.
Assistance level indicator
Displays a gauge indicating the
level until the vehicle’s stopping
position/the position at which assist
control ends.
Stop display
When illuminated, depress the
brake pedal and stop the vehicle at
once.
Operation display area
Displays the operating condition of the Simple Intelligent Parking Assist
System.
Advice display
Follow the instructions on the display and perform any indicated opera-
tions. As an example, the illustration shows the display indicating it is nec-
essary to depress the brake pedal in order to control the vehicle speed and
to confirm the safety of your surroundings.
S-IPA switch icon
Displayed when the assist mode can be changed and the system can be
turned off or on using the S-IPA switch.
Steering wheel auto operation display
Displays when the steering wheel auto operation is being performed.
Toyota parking assist-sensor display/door position (open/close) dis-
play
P. 451
QS-IPA indicator inside the meter (P. 208)
This indicator illuminates when the steering wheel auto operation is being
performed by the Simple Intelligent Parking Assist System. After control
ends, the indicator blinks for a short period of time and then turns off.
QToyota parking assist-sensor pop-up display
While the Simple Intelligent Parking Assist System is operating, if the Toyota
parking assist-sensor function detects an obstacle, the Toyota parking assist-
sensor display automatically pops up on the guidance screen (P. 451),
regardless of whether the Toyota parking assist-sensor function is on or off.
(P. 450)
Guidance screen
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2
3
4
5
6
7

4905-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
QExit parallel parking assist mode
O During assist control, if the driver determines that they are at a position
where take-off is possible and operates the steering wheel, ass ist control is
stopped at that position.
O Assist control cannot be used if there are no parked vehicles ahead, or if the
gap between the front of your vehicle and the vehicle parked ah ead is too
large.
O When using the exit parallel parking assist mode, the assist mode may not
be able to operate depending on the surrounding environment.
NOTICE
O The detection range of the sensors (P. 455) is limited. Directly confirm
the safety of your surroundings, and if there is a possibility of a contact
accident, stop the vehicle by depressing the brake pedal.
O It may not be possible to detect objects that are low to the ground. Directly
confirm the safety of your surroundings and, if it seems the ve hicle may
make contact with an obstacle, stop the vehicle by depressing t he brake
pedal.
O When departing for a position from which you can take off, directly confirm
the safety of your surroundings.

4975-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
5
Driving
QTips for using the back-in parking assist mode
O Leave a gap of approximately 1 m
(3.3 ft.) from any parked vehicles and
approach the target parking spot. If the
gap between your vehicle and any
parked vehicles is too large, the front
side sensors and rear side sensors may
not be able to detect the parked vehi-
cles.
O Stop so that the center of the target
parking spot is perpendicular to the vehi-
cle. Furthermore, only push the S-IPA
switch when the vehicle is at a complete
stop.
NOTICE
O If the road surface has any dips or inclines, the target parking spot cannot
be correctly set. Therefore, the vehicle may be parked at an an gle or may
deviate from the parking spot. In these cases, do not use the b ack-in park-
ing assist mode.
O When parking in a narrow space, the vehicle will come close to adjacent
vehicles. If it seems the vehicle may make contact, stop the ve hicle by
depressing the brake pedal.
O It may not be possible to detect objects that are low to the ground. Directly
confirm the safety of your surroundings and, if it seems the ve hicle may
make contact with an obstacle, stop the vehicle by depressing t he brake
pedal.
O Depending on the surrounding environment, such as other parked vehi-
cles, the vehicle may be parked at an angle or may deviate from the park-
ing spot. Manually adjust vehi cle alignment as necessary.
1 m
(3.3 ft.)

5075-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
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Driving
WARNING
OObserve the following precautions, as the sensors may stop functioning
properly which may lead to an accident.
• Do not subject the sensor to strong shocks by hitting it, etc. The sen-
sors may not function properly.
• When using a high-pressure washer to wash the vehicle, do not spray
water directly on the sensors. Equipment may not function prope rly if
subjected to an impact from strong water pressure. If the vehic le
bumper strikes something, equipm ent may not operate properly due to
a sensor malfunction. Have the vehicle inspected at any authori zed
Toyota retailer or Toyota author ized repairer, or any reliable repairer.
O In the following situations, the sensors may not operate normally and may
lead to an accident. Drive carefully.
• Obstacles cannot be detected in the side areas until a scan of the side
areas is completed. ( P. 456)
• 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.
• The sensor is frozen (if it thaws, the system returns to norma l).
A warning message may display at particularly low temperatures due to
the sensor freezing and it may not detect parked vehicles.
• The sensor is blocked by someone’s hand.
• The vehicle is tilted a large amount.
• The temperature is extremely hot or cold.
• The vehicle is driven on undulating roads, slopes, gravel road s, in areas
with tall grass, etc.
• An ultrasonic wave source is nearby, such as the horn or senso rs of
another vehicle, a motorcycle engine or the air brake of a larg e vehicle.
• Heavy rain or a water strikes the vehicle.
• The angle of the sensor may be deviated when assist control st arts
even if there is a parked vehicle in the target parking spot. H ave the
vehicle inspected at any authorized Toyota retailer or Toyota a uthorized
repairer, or any reliable repairer.
• Do not install any accessories within the sensor detection ran ge.