2023 TOYOTA PRIUS PRIME brake

3505-5. Using the driving support systems
WARNING
●The Traffic Jam Assist function
cannot detect the following
objects. Operate the steering
wheel, accelerator pedal, or
brake pedal as necessary to
avoid a collision. As the function
will not be able to provide
appropriate control, using it may
lead to an accident resulting in
death or serious injury.
• Objects on the road surface
• Vehicles outside of a lane (such as on the shoulder of the road)
• Potholes, cracks, ruts, or other road damage
• Road construction zones
• Vehicles running in parallel with your vehicle or nearby walls
• Animals
■Situations in which Traffic
Jam Assist Function should
not be used
Do not use Traffic Jam Assist
Function in situations such as the
following. As the system will not
be able to provide appropriate
control, using it may lead to an
accident resulting in death or seri-
ous injury.
■When it is necessary to dis-
able the system
 P.284
■Situations in which the sen-
sors may not operate prop-
erly
 P.289
■Situations in which the lane
may not be detected
 P.291
■Situations in which the func-
tion may not operate properly
In situations such as the following,
the Traffic Jam Assist function
may not operate properly. Manu-
ally operate the vehicle as neces-
sary.
●When a sensor is splashed by
water
●When the ambient temperature
is high or low
●When a vehicle cuts in front of
your vehicle
●When another lane merges into
the lane in the same traveling
direction as your vehicle
●When driving in low visibility
conditions
●When the vehicle posture is
changing
●When the traction on the road
surface differs greatly between
the left and right side tires
●When driving on an expressway
with no median strips or when
driving on an expressway
equipped with temporary
median markers, such as poles.
●When there is a significant dif-
ference in speed between your
vehicle and the other vehicle
●The map data has not been
updated properly.
■To prevent malfunction of the
radar sensors
 P.286
■To prevent malfunction of the
front camera
 P.287

3515-5. Using the driving support systems
5
Driving
■Operating conditions of the
function
This function is operable when all of
the following conditions are met:
●The system detects lane lines and
the path of preceding or surround-
ing vehicles.
●The dynamic radar cruise control
and the lane tracing assist are
operating.
●The turn signal lever is not being
operated.
●The vehicle is not being driven
around a sharp curve.
●The vehicle is being driven in the
center of a lane.
●The driver monitor camera is
detecting that the driver is facing
front of the vehicle.
●The vehicle is driving in traffic jam
on a highway or expressway at
approximately 25 mph (40 km/h)
or less. (In some situations, such
as when a traffic jam starts, this
function may be operational at
approximately 20 mph (30 km/h)
or less.)
●It is necessary to enter a con-
nected services contract, provided
by Toyota, to use these functions.
For details, contact your Toyota
dealer.
●The driver’s door is closed.
●The driver’s seat belt is fastened.
●Customized setting of the Traffic
Jam Assist is not set to off.
●Functions and components com-
posing the system are in proper
condition.
●Customized setting of the PCS (Pre-Collision System) is not set
to off.
●Customized setting of the dynamic
radar cruise control (re-start time
extension) is not set to off.
■Temporary cancelation of the
function
●When the operating conditions are
no longer met, a function may be
temporarily canceled. However,
when the operation conditions are
met again, operation of the func-
tion will automatically be restored.
●If the operating conditions of a
function are no longer met while
the function is operating, a buzzer
may sound with a display to indi-
cate that the function has been
temporarily canceled. If no driver’s
responses to the
indication are
detected, the driver emergency
stop assist function may operate.
For types of display and action to
be taken, see the page mentioned
below. ( P.352)
■Driving operations during con-
trolled driving:
●Accelerator pedal
As with normal driving, acceleration
can be performed by depressing the
accelerator pedal. When the accel-
erator pedal is depressed at approx-
imately 10 km/h (6 mph) or more,
this function will be canceled.
●Brake pedal
As with normal driving, deceleration
can be performed by depressing the
brake pedal. However, controlled
driving will be cancelled.
●Steering wheel
As with normal driving, the steering
wheel can be operated. If the steer-
ing wheel is operated more than a
certain amount, controlled driving
will be cancelled.
WARNING
■Front camera installation area
on the windshield
 P.288

3535-5. Using the driving support systems
5
Driving
Yellow
Indicates that driving actions are necessary
to cope with cut-in or other behavior of sur-
rounding vehicles
The driver
must operate
the steering
wheel, accel-
erator pedal
and brake
pedal in
accordance
with the sur-
rounding
environment.
Indicates that the recording function of the
driver monitor camera is operational (Blinking
of this icon indicates that recording is under-
going, and constant illumination indicates
ready for recording.)

DisplayStatusAction to be taken

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.

3825-5. Using the driving support systems
camera
• If the orientation of the rear cam- era has been changed due to a
collision or other impact, or
removal and installation
• If a towing eyelet is installed to the
rear of the vehicle
• When towing with the vehicle
• When water is flowing over the rear camera lens
• When the rear camera is obscured (dirt, snow, ice, etc. are
attached) or scratched
• If there is a flashing light in the detection area, such as the emer-
gency flashers of another vehicle
• When tire chains or an emergency tire puncture repair kit are used.
●Situations in which the rear cam-
era detection function may be diffi-
cult to notice
• The buzzer may be difficult to hear if the surrounding area is noisy or
the audio system volume is high.
• If the temperature in the cabin is extremely high or low, the Multi-
media Display may not operate
correctly.
*: If equipped
PKSB (Parking Sup-
port Brake)*
The PKSB (Parking Support
Brake) is a system that
issues warnings and auto-
matically performs braking
to help reduce collision
damage with operation tar-
gets that were detected
when traveling at a low
speed such as when park-
ing.
This system consists of the
following functions: a Park-
ing Support Brake function
(static objects to the front
and rear) that detects static
objects such as walls, a
Parking Support Brake
function (rear-crossing
vehicles)
* that detects vehi-
cles approaching from the
rear while backing up, a
Parking Support Brake
function (rear pedestrians)
*
that detects pedestrians
behind the vehicle, and a
Parking Support Brake
function (static objects
around the vehicle) (vehi-
cles with Advanced Park)
that detects static objects
around the vehicle.
*: If equipped

3835-5. Using the driving support systems
5
Driving
The system has detected the
following as operation targets.
(The operation targets vary
depending on the function.)
Parking Support Brake func-
tion (static objects to the front
and rear):
P.388
 Parking Support Brake func-
tion (rear-crossing vehicles)
(if equipped):
P.392
 Parking Support Brake func-
tion (rear pedestrians) (if
equipped):
P.393
 Parking Support Brake func-
tion (static objects around the
vehicle) (vehicles with
Advanced Park):
P.388
PKSB (Parking Support
Brake) systemWARNING
■Cautions regarding the use of
the system
Do not overly rely on the system,
as doing so may lead to an acci-
dent.
Always drive while checking the
safety of the surroundings of the
vehicle.
Depending on the vehicle and
road conditions, weather, etc., the
system may not operate.
The detection capabilities of sen-
sors and radars are limited.
Always drive while checking the
safety of the surroundings of the
vehicle.
●The driver is solely responsible
for safe driving. Always drive
carefully, taking care to observe
your surroundings. The Parking
Support Brake system is
designed to provide support to
lessen the severity of collisions.
However, it may not operate in
some situations.
●The Parking Support Brake sys-
tem is not designed to stop the
vehicle completely. Addition-
ally, even if the system has
stopped the vehicle, it is neces-
sary to depress the brake pedal
immediately as brake control
will be canceled after approxi-
mately 2 seconds.
●It is extremely dangerous to
check the system operations by
intentionally driving the vehicle
into the direction of a wall, etc.
Never attempt such actions.
■When 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 colli-
sion.

3845-5. Using the driving support systems
All of the Parking Support Brake
functions (static objects to the
front and rear, rear-crossing
vehicles [if equipped], rear
pedestrians [if equipped], and
static objects around the vehicle
[vehicles with Advanced Park])
are enabled/disabled simultane-
ously.
The Parking Support Brake
function can be enabled/dis-
abled on of the multi-infor-
WARNING
●When inspecting the vehicle
using a chassis roller, chassis
dynamo or free roller
●When loading the vehicle onto a
boat, truck or other transport
vessel
●If the suspension has been
modified or tires of a size other
than specified are installed
●If the front of the vehicle is
raised or lowered due to the
carried load
●When equipment that may
obstruct a sensor is installed,
such as a towing eyelet, trans-
port hook, bumper protector (an
additional trim strip, etc.), bicy-
cle carrier, or snow plow
●When using automatic car
washing devices
●If the vehicle cannot be driven in
a stable manner, such as when
the vehicle has been in an acci-
dent or is malfunctioning
●When the vehicle is driven in a
sporty manner or off-road
●When the tires are not properly
inflated
●When the tires are very worn
●When tire chains, a compact
spare tire or an emergency tire
puncture repair kit are used.
●When towing with the vehicle
■Precautions for the suspen-
sion
Do not modify the suspension of
the vehicle. If the height or tilt of
the vehicle is changed, the sen-
sors may not be able to detect
detectable objects and the system
may not operate correctly, possi-
bly leading to an accident.
NOTICE
■If “System Stopped See
Owner’s Manual” is displayed
on the multi-information dis-
play and the driving assist
information indi cator is illu-
minated
If this message is displayed
immediately after the power
switch is changed to ON, operate
the vehicle carefully, paying atten-
tion to your surr oundings. It may
be necessary to drive the vehicle
for a certain amount of time
before the system returns to nor-
mal. (If the system is not return to
normal after driv ing for a while,
clean the sensor or rear camera
lens.)
Enabling/Disabling the
Parking Support Brake