2023 TOYOTA PRIUS brake

3444-5. Using the driving support systems
PRIUS_OM_OM47F32E_(EE)■When the sensor may not be correctly detecting the vehicle ahead
In the case of the following and depending on the conditions, operate the
brake pedal when deceleration of the system is insufficient or operate the
accelerator pedal when acceleration is required.
As the sensor may not be able to correctly detect these types of vehicles, the
approach warning (P. 339) may not be activated.
●Vehicles that cut in suddenly
●Vehicles traveling at low speeds
●Vehicles that are not moving in the same lane
●Vehicles with small rear ends (trailers with no load on board, etc.)
●Motorcycles traveling in the same lane
●When water or snow thrown up by the surrounding vehicles hinders the
detecting of the sensor
●When your vehicle is pointing upwards
(caused by a heavy load in the luggage
compartment, etc.)
●Preceding vehicle has an extremely high
ground clearance

3454-5. Using the driving support systems
4
Driving
PRIUS_OM_OM47F32E_(EE)■Conditions under which the vehicle-to-vehicle distance control mode
may not function correctly
In the case of the following conditions, operate the brake pedal (or accelera-
tor pedal, depending on the situation) as necessary.
As the sensor may not be able to correctly detect vehicles ahead, the system
may not operate properly.
●When the vehicle ahead of you decelerates suddenly
●When driving on a road surrounded by a structure, such as in a tunnel or on
a bridge
●While the vehicle speed is decreasing to the set speed after the vehicle
accelerates by depressing the accelerator pedal ●When the road curves or when the lanes
are narrow
●When steering wheel operation or your
position in the lane is unstable

3484-5. Using the driving support systems
PRIUS_OM_OM47F32E_(EE)
To change the set speed, operate the lever until the desired set speed
is obtained.
Increases the speed
Decreases the speed
Fine adjustment: Momentarily
move the lever in the desired direc-
tion.
Large adjustment: Hold the lever in
the desired direction.
The set speed will be increased or decreased as follows:
Fine adjustment: By approximately 1 km/h (0.6 mph) or 1 mph (1.6 km/h)
each time the lever is operated
Large adjustment: The set speed can be increased or decreased continu-
ally until the lever is released.
Pulling the lever toward you
cancels the constant speed
control.
The speed setting is also canceled
when the brake pedal is
depressed.
Pushing the lever up resumes
the constant speed control.
However, resuming is available
when the vehicle speed is more
than approximately 30 km/h
(20 mph).
Adjusting the set speed
1
2
Canceling and resuming the constant speed control
1
2

3554-5. Using the driving support systems
4
Driving
PRIUS_OM_OM47F32E_(EE)
■ Automatic speed limiter cancellation
The set speed is automatically canceled in any of the situations:
● Cruise control is activated.
● When the VSC system and/or TRC system is turned off.
■ If the “Speed Limiter Malfunction Visit Your Dealer” is displayed on the
multi-information display
Stop in a safe location, turn the power switch off and back on again, and then
set the speed limiter. If the speed limiter cannot be set, the system may be
malfunctioning. Even though the vehicle can be driven normally, have the
vehicle inspected by any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
WARNING
■ To avoid operating the speed limiter by mistake
Keep the speed limiter switch off when not in use.
■ Situations unsuitable for speed limiter
Do not use the speed limiter in either of the following situations.
Doing so may result in control of the vehicle being lost and could cause a
serious or fatal accident.
● On slippery roads, such as those covered with rain, ice or snow
● On steep hills
● When towing a trailer or emergency towing
NOTICE
When a warning is issued using the meter display and buzzer after exceed-
ing the set speed limit on a steep decline, depress the brake pedal to decel-
erate.

3894-5. Using the driving support systems
4
Driving
PRIUS_OM_OM47F32E_(EE)
■ Objects which the system may not properly detect
The shape of the object may prevent the sensor from detecting it. 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
■ 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 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 espe-
cially cold weather, if a sensor is frozen the sensor display may be displayed
abnormally, or objects, such as a wall, may not be detected.
● 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 ot her 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 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, motorcycle, bicycle or pedestrian cuts in front
of the vehicle or runs out from the side of the vehicle
● When a sensor or the area around a
sensor is extremely hot or cold.

3914-5. Using the driving support systems
4
Driving
PRIUS_OM_OM47F32E_(EE)
● When vehicle horns, vehicle detectors, motorcycle engines, air brakes of
large vehicles, the clearance sonar of ot her 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
● Driving close to columns (H-shaped steel beams, etc.) in multi-story parking
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
● When tire chains, a compact spare tire or an emergency tire puncture repair
kit are used.
● On an extremely bumpy road, on an
incline, on gravel, or on grass

3944-5. Using the driving support systems
PRIUS_OM_OM47F32E_(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

3964-5. Using the driving support systems
PRIUS_OM_OM47F32E_(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. 153) 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