2023 TOYOTA PRIUS PRIME brakes

3335-5. Using the driving support systems
5
Driving
Constant speed cruising
When there are no vehicles ahead
The vehicle drives at the speed set by the driver.
If the set vehicle speed is exceeded while driving down a hill, the set vehicle
speed display will blink and a buzzer will sound.
Deceleration and follow-up cruising
When a preceding vehicle driving slower than the set vehicle
speed is detected
When a vehicle is detected driving ahead of your vehicle, the vehicle auto-
matically decelerates and if a greater reduction in vehicle speed is neces-
sary, the brakes are applied (the stop lights will come on at this time). The
vehicle is controlled to ma intain the vehicle-to-vehicle distance set by the
driver, in accordance with changes in the speed of the preceding vehicle. If
vehicle deceleration is not sufficient an d the vehicle approaches the vehicle
ahead, the ap proach warning will sound.
Acceleration
When there are no longer any pr eceding vehicles driving slower
than the set vehicle speed
The vehicle accelerates until the set vehicle speed is reached and then
resumes constant speed cruising.
Starting off
Basic functions
A
B
C
D

3385-5. Using the driving support systems
●When a preceding vehicle brakes
suddenly
●When changing lanes at low
speeds, such as in a traffic jam
■Conditions for extended
resume time (Vehicles with
Traffic Jam Assist)
Extended resume ti me is activated
when all of the following conditions
are satisfied:
●The connected service that
Toyota provides is subscribed to.
Contact your Toyota dealer for
details.
●The vehicle is driving on a vehicle-
only road, such as an express-
way.
●There is a preceding vehicle and
the system is able to detect it.
●No vehicle interruptions occur.
●The preceding vehicle has not
been replaced.
●Clearance sonar and FCTA are
not detecting the object in front of
you.
●The driver monitor judges that the
driver is looking forward.
●The steering wheel has not been
operated.
●The brake pedal has not been
operated.
In situations where the vehicle
approaches a preceding vehicle
and the system cannot provide
sufficient deceleration, such as
if a vehicle cuts in front of the
vehicle, a warning display will
flash and a buzzer will sound to
alert the driver. Depress the
brake pedal to ensure appropri-
ate vehicle-to-vehicle distance.
■Warnings may not occur
when
In the following situations, the
warning may not operate even
though the vehicle-to-vehicle
distance is short.
 When the preceding vehicle is
traveling at the same speed
or faster than your vehicle
 When the preceding vehicle is
traveling at an extremely low
speed
 Immediately after the vehicle
speed has been set
 When the accelerator pedal is
depressed
When a curve is detected, the
vehicle speed will begin being
reduced. When the curve ends,
the vehicle speed reduction will
end.
Depending on the situation, the
vehicle speed will then return to the
set vehicle speed.
In situations where vehicle-to-vehi-
cle distance control needs to oper-
ate, such as when a preceding
vehicle cuts in front of your vehicle,
the curve speed reduction function
will be canceled.
Approach warning
Curve speed reduction
function

3665-5. Using the driving support systems
■Objects which the system may
not properly detect
The shape of the object may pre-
vent the sensor from detecting it.
Pay particular attention to the fol-
lowing 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 direc-
tion of your vehicle
People may not be detected if they
are wearing certain types of cloth-
ing.
■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 especially cold weather, if a
sensor is frozen the sensor dis-
play may be displayed abnor-
mally, or objects, such as a wall,
may not be detected.
●When a sensor or the area around
a sensor is extremely hot or cold.
●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 clear-
ance sonar of other vehicles or
other devices which produce ultra-
sonic 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 ultra-
sonic waves (ex. skirts with gath-
ers or frills).
●When objects that are not perpen-
dicular to the ground, not perpen-
dicular to the vehicle traveling
direction, uneven, or waving are in
the detection range.
●When strong winds are 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 such as a towing
eyelet, transport hook, bumper
protector, bumper trim, bicycle
carrier or snow-removal device
(snow plow) is installed near the
sensor.
●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 tire chains, a compact
spare tire or an emergency tire
puncture repair kit are used.

3675-5. Using the driving support systems
5
Driving
■Situations in which the system
may operate even if there is no
possibility of a collision
In some situations, such as the fol-
lowing, the system may operate
even though there is no possibility of
a collision.
●When driving on a narrow road.
●When driving toward a banner,
flag, low-hanging branch or boom
barrier (such as those used at rail-
road crossings, toll gates and
parking 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 strong winds are blowing.
●When vehicle horns, vehicle
detectors, motorcycle engines, air
brakes of large vehicles, the clear-
ance sonar of other vehicles or
other devices which produce ultra-
sonic 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.
●The vehicle is approaching a tall
or curved curb.
●Driving close to columns (H-
shaped steel beams, etc.) in multi-
story parking garages, construc-
tion 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.
●On an extremely bumpy road, on
an incline, on gravel, or on grass.
●When tire chains, a compact
spare tire or an emergency tire
puncture repair kit are used.

3865-5. Using the driving support systems
Multi-information display: “Acceler-
ator Pedal is Pressed Press Brake
Pedal” (If the accelerator pedal is
not depressed, “Press Brake Pedal”
will be displayed.)
Driving assist info rmation indicator:
Illuminated
Buzzer: Sounds repeatedly
If the Parking Support Brake
determines that a collision with a
detected object or pedestrian (if
equipped) is possible, the hybrid
system output will be restricted
to restrain any increase in the
vehicle speed. (Hybrid system
output restriction control: See
figure 2.)
Additionally, if the accelerator
pedal continues to be
depressed, the brakes will be
applied automatically to reduce
the vehicle speed. (Brake con-
trol: See figure 3.)
 Figure 1: When the PKSB
(Parking Support Brake) is not
operating
Hybrid system output
Braking force Time
 Figure 2: When hybrid system
output restriction control oper-
ates
Hybrid system output
Braking force
Time
Hybrid system output restric-
tion control begins operating
(System determines that pos-
sibility of collision with
detected object is high)
 Figure 3: When hybrid system
output restriction control and
brake control operates
Hybrid system output
Braking force
Time
Hybrid system output restric-
System overview
A
B
C
A
B
C
D
A
B
C
D

3935-5. Using the driving support systems
5
Driving
control
• The Parking Support Brake is dis- abled.
• The collision becomes avoidable with normal brake operation.
• A vehicle is no longer approaching
from the right or left at the rear of
the vehicle.
●Brake control
• The Parking Support Brake is dis- abled.
• Approximately 2 seconds have elapsed since the vehicle was
stopped by brake control.
• The brake pedal is depressed after the vehicle is stopped by
brake control.
■Detection area of the Parking
Support Brake function (rear-
crossing vehicles)
The detection area of the Parking
Support Brake function (rear-cross-
ing vehicles) differs from the detec-
tion area of the RCTA function
(  P.374). Therefore, even if the
RCTA function detects a vehicle
and provides an alert, the Parking
Support Brake function (rear-cross-
ing vehicles) may not start operat-
ing.
■Situations in which the system
may not operate properly
 P.376
■Situations in which the system
may operate even if there is no
possibility of a collision
 P.377
*: If equipped
The system operates when an
approaching pedestrian is
detected behind the vehicle
while backing up, and when the
brake pedal is not depressed or
is depressed late.
Parking Suppo rt Brake
function (rear pedes-
trians)
*
If the rear camera sensor
detects a pedestrian behind
the vehicle while backing up
and the system determines
that the possibility of collid-
ing with the detected pedes-
trian is high, a buzzer will
sound. If the system deter-
mines that the possibility of
colliding with the detected
pedestrian is extremely
high, the brakes will be
applied automatically to
help reduce the impact of
the collision.
Examples of system oper-
ation

4065-5. Using the driving support systems
screen will rotate.
■If you feel that the vehicle is
approaching close to a sur-
rounding vehicle, object, per-
son, or gutter
Depress the brake pedal to stop the
vehicle and then change the shift
position to change the direction of
travel of the vehicle. At this time,
assist will be suspended. However,
if the “Start” button is selected,
assist will resume and the vehicle
will move in the direction corre-
sponding to the selected shift posi-
tion.
■When the brakes have been
operated
When the brakes have been oper-
ated, brake operation sound may be
heard. This does not indicate a mal-
function.
When exiting from a perpendic-
ular parking space, if the system
determines that exit is possible
the perpendicular exiting (for-
ward/reverse) function can be
used. Also, depending on the
surrounding environment, if it is
necessary to change the direc-
tion of travel of the vehicle, the
shift position can be changed by
assistance control.NOTICE
■When using the perpendicu-
lar parking (forward/reverse)
function
●Make sure that there are no
obstructions within the yellow
guide lines and between the
vehicle and target parking spot.
If there are any obstructions
between the vehicle and the tar-
get parking space, or between
the yellow guide lines, cancel
the function.
●As the target parking space will
not be able to be set correctly if
the surface of the parking space
is on a slope or has differences
in height, the vehicle may stray
from the target parking space or
be slanted. Therefore, do not
use the function for this kind of
parking spot.
●When parking in a narrow park-
ing space, the vehicle may
closely approach an adjacent
parked vehicle. If a collision
seems likely, depress the brake
pedal to stop the vehicle.
●If a detected parked vehicle is
narrow or parked extremely
close to the curb, the position at
which assistance will park the
vehicle will also be close to the
curb. If it seems likely the vehi-
cle will collide with something or
drive off of the road, depress
the brake pedal to stop the vehi-
cle, and then press the Advance
Park main switch to disable the
system.
Advanced Park perpen-
dicular exiting (for-
ward/reverse) function

4085-5. Using the driving support systems
or brake pedal.
■If you feel that the vehicle is
approaching close to a sur-
rounding vehicle, object, per-
son, or gutter
 P.406
■Perpendicular exiting (for-
ward/reverse) function
Do not use exiting (for-
ward/reverse) function in any situa-
tion other than when exiting a
parallel parking spot. If assistance is
started unintentionally, depress the
brake pedal and stop the vehicle,
then press the Advanced Park main
switch to cancel assistance.
■Situations in which the perpen-
dicular exiting (forward/reverse)
function will not operate
In situations such as the following,
the perpendicular exiting (for-
ward/reverse) func tion will not oper-
ate:
●When a vehicle which is waiting to
park is in the exit direction
●When a wall, column, or person is
detected as near a front or rear
center or corner sensor
■When the brakes have been
operated
 P.406
The parallel parking function
can be used if the target parking
space can be detected when the
vehicle is stopped close and
aligned with the center of the
parking space. Also, depending
on the condition of the parking
space, etc., if it is necessary to
change the direction of travel of
the vehicle, the shift position can
be changed by assistance con-
trol.
1 Stop the vehicle with it
aligned near the center of the
target parking space.
Advanced Park parallel
parking function
Parking using the parallel
parking function