parking sensors TOYOTA PRIUS PLUG-IN HYBRID 2020 User Guide

5105-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Parking Support 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

5125-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
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. 257) 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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Changing settings of the Parking Support Brake function

5175-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
5
Driving
■Sensor detection range
The detection range of the Parking Support Brake function differs from the
detection range of the Toyota parking assist-sensor. (P. 504)
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.
■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. 512), 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
■Toyota parking assist-sensor buzzer
Regardless of whether the Toyota parking assist-sensor is on or off (P. 4 9 9 ) ,
if the Parking Support Brake function is not stopped (P. 512), when the front
or rear sensors detect an obstacle and brake control is performed, the Toyota
parking assist-sensor buzzer also sounds and a notification of the approximate
distance to the obstacle is provided.

5185-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■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

5205-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
●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
●Changes in the vehicle
• When driving with the shift position in N
• The vehicle is tilted a large amount
• The height of the vehicle has drastically changed due to the carried load
(the nose tilts up or down)
• The direction of the sensor has deviated due to a collision or other impact
■Parking Support Brake function while the Simple Intelligent Parking
Assist System is operating
P. 525
■When removing and installing the 12-volt battery
The system needs to be initialized.
The system can be initialized by driving the vehicle straight ahead for 5 sec-
onds or more at a speed of approximately 35 km/h (22 mph) or higher.
■When “PKSB Unavailable” is displayed on the multi-information display
and the PKSB OFF indicator flashes
●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 due to ice
forming on the sensor, and the sensor may not detect obstacles. Once the
ice melts, the system will return to normal.
●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 inspected at
any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer.
●System initialization may not have been performed after removal and instal-
lation of the 12-volt battery. Perform system initialization.
■When “PKSB Malfunction Visit Your Dealer” is displayed on the multi-
information display, the PKSB OFF indicator flashes and the buzzer
sounds
The system may not be operating properly. Have the vehicle inspected at any
authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer.

5215-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
5
Driving
WARNING
■ For safe use
Do not rely solely upon the system. Relying solely upon the system may
lead to an unexpected accident.
● 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 suppor t to lessen the severity of colli-
sions. However, it may not operate depending on the situation.
● The Parking Support Brake function is not a system designed to com-
pletely stop the vehicle. Furthermore, even if the Parking Support Brake
function is able to stop the vehicle, brake control is canceled after approxi-
mately 2 seconds, so depress the brake pedal immediately.
■ In order for the system to operate properly
Make sure to observe the following precautions regarding the sensors
( P. 512). Failure to observe these precautions may cause the sensors
not to operate properly, and may result in an unexpected accident.
● Do not perform work such as modification, disassembly or painting
● Only perform replacements using genuine parts
● Do not subject the area around the sensors to any impacts
● Do not damage the sensors, and always keep them clean
■ Handling the suspension
Do not modify the suspension, as changes to the height or incline of the
vehicle may prevent the sensors from correctly detecting obstacles, may
cause the system not operate, or may cause the system to operate unnec-
essarily.

5225-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
NOTICE
■Preventing sensor malfunctions
● If the area around a sensor is subjected to an impact, equipment may not
operate properly due to a sensor malfunction. Have the vehicle inspected
at any authorized Toyota retailer or Toyota authorized repairer, or any reli-
able repairer.
● When using a high-pressure washer to wash the vehicle, do not spray
water directly on the sensors. The sensors may not function properly if
subjected to an impact from strong water pressure.
● 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.
■ Preventing unnecessary operation
In the following situations, turn the Parking Support Brake function off. The
system may operate even though there is no possibility of a collision.
● A chassis roller, chassis dynamo, free roller or similar equipment is being
used for an inspection, etc.
● The vehicle is being loaded onto a ship, truck or other transport vessel
● The suspension has been lowered or tires that have a different size than
the genuine tires are equipped
● The height of the vehicle has drastically changed due to the carried load
(the nose tilts up or down).
● A towing eyelet is installed
● When using an automatic car wash

5345-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■Parallel parking assist mode operating conditions
●In order to operate the parallel parking assist mode correctly, drive slowly (at
a speed at which the vehicle can be quickly stopped) parallel to the road (or
shoulder) while maintaining a distance of approximately 1 m (3.3 ft.) to any
parked vehicles.
●The function cannot be used when the vehicle speed is approximately
30 km/h (19 mph) or higher.
●The front side sensors and rear side sensors are used to detect parked
vehicles and determine the parking spot. Therefore, when detection is not
possible (P. 557), guidance is not issued.
●If there are no parked vehicles, the parking spot cannot be determined.
Therefore, the parallel parking assist mode cannot be operated.
●If unable to detect the environment surrounding the parking space, the par-
allel parking assist mode may not be able to operate.
●Guidance will continue until the vehicle speed meets or exceeds approxi-
mately 30 km/h (19 mph) or the function is turned off using the S-IPA switch.
■Timing for pressing the S-IPA switch
In the following cases, the assist mode may also operate during the steps
taken to park using the parallel parking assist mode. However, in these
cases, conduct parking procedures according to the information on the multi-
information display.
●In step the S-IPA switch is pressed after already passing over the target
parking spot.
If the vehicle is not stopped in step , pressing the S-IPA switch 1 time
while the vehicle is in motion allows you to select “Parallel Parking” and
proceed directly to step .
●The vehicle is moved up to the position in step without the S-IPA switch
being pressed. Then the S-IPA switch is pressed after having changed the
shift position to R.
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5405-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■Exit parallel parking assist mode
● During assist control, if the driver determines that they are at a position
where take-off is possible and operates the steering wheel, assist control is
stopped at that position.
● 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 ahead is too
large.
● When using the exit parallel parking assist mode, the assist mode may not
be able to operate depending on the surrounding environment.
NOTICE
● The detection range of the sensors (P. 504) 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.
● 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 vehicle may
make contact with an obstacle, stop the vehicle by depressing the brake
pedal.
● When departing for a position from which you can take off, directly confirm
the safety of your surroundings.

5465-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■Back-in parking assist mode operating conditions
● In order to operate the function correctly, drive slowly (at a speed at which
the vehicle can be quickly stopped).
● In order to operate the function correctly, drive slowly (at a speed at which
the vehicle can be quickly stopped). Come to a full stop so that the center of
the parking space is nearly perpendicular to the vehicle, and then operate
the S-IPA switch.
● The function cannot be used when the vehicle speed is approximately
30 km/h (19 mph) or higher.
● The front side sensors and rear side sensors are used to detect parked
vehicles and determine the parking spot. Therefore, when detection is not
possible ( P. 557), guidance is not issued.
● If there are no parked vehicles, the parking spot cannot be determined.
Therefore, the back-in parking assist mode cannot be operated.
● If unable to detect the environment surrounding the parking space, the
back-in parking assist mode may not be able to operate.
● Depending on the condition of the park-
ing space, if there is not enough space
in front of the vehicle required to perform
the parking operation, the target parking
spot may not be reachable.
Intended parking spot
Wal l
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