2023 TOYOTA PRIUS PRIME brake light

2915-5. Using the driving support systems
5
Driving
such as tall grass, tree branches,
a curtain, etc.
●When driving in strong wind
■Situations in which the lane
may not be detected
●When the lane is extremely wide
or narrow
●Immediately after changing lanes
or passing through an intersection
●When driving in a temporary lane
or lane regulated by construction
●When there are structures, pat-
terns, shadows which are similar
to lane lines in the surrounding
●When there are multiple white
lines for a lane line
●When the lane lines are not clear
or driving on a wet road surface
●When a lane line is on a curb
●When driving on a bright, reflec-
tive road surface, such as con-
crete
■Situations in which some or all
of the functions of the system
cannot operate
●When a malfunction is detected in
this system or a related system,
such as the brakes, steering, etc.
●When the VSC, TRAC, or other
safety related syst em is operating
●When the VSC, TRAC, or other
safety related system is off
■Changes in brake operation
sound and pedal response
●When the brakes have been oper-
ated, brake operation sounds may
be heard and the brake pedal
response may change, but this
does not indicate a malfunction.
●When the system is operating, the
brake pedal may feel stiffer than
expected or sink. In either situa-
tion the brake pedal can be
depressed further. Further
depress the brake pedal as nec-
essary.
■Situations in which the driver
monitor may not operate prop-
erly (if equipped)
In situations such as the following,
the driver monitor camera may not
be able to detect the driver’s face,
and the function may not operate
properly.
●When the inside of the vehicle is
hot, such as after the vehicle has
been parked in the sun
●When a very bright light, such as
the sun or the headlights of follow-
ing vehicle, shines onto the driver
monitor camera
●When the brightness inside the
vehicle changes frequently due to
the shadows of surrounding struc-
tures, etc.
●When a very bright light, such as
the sun or the headlights of an
oncoming vehicle, is shining onto
the driver’s face
●When light, either inside or out-
side of the vehicle, is being
reflected from the lenses of eye-
glasses or sunglasses
●When there are multiple faces in
the detection range of the driver
monitor camera, such as when a
front or rear passenger is leaning
toward the driver’s seat
●When the driver’s face is outside
of the detection range of the driver
monitor camera, such as when
leaned forward or when their head
is outside of the window
●When the driver monitor camera is
being blocked by the steering
wheel, a hand holding the steering
wheel, an arm, etc.
●When the driver is wearing a hat
●When the driver is wearing an
eyepatch
●When the driver is wearing eye-
glasses or sunglasses that do not
easily transmit infrared rays
●When the driver is wearing con-
tact lenses

3005-5. Using the driving support systems
*: Minimum vehicle speed: Vehicle speed at which evasion using pre-colli-
sion brake control is difficult
While the emergency steering assist is operating, if any of the following are
performed, emergency steering assist operation may be cancelled:
• The accelerator pedal is strongly depressed
• The steering wheel is operated heavily or suddenly
• The brake pedal is depressed
●Intersection collisio n avoidance support (left/right turn)
The intersection collision av oidance support (for left/right turning vehicles)
will not operate when the turn signal lights are not flashing.
●Intersection collisio n avoidance support (crossing vehicles)
Detectable objectsVehicle speedRelative speed between
your vehicle and object
Preceding vehicles,
stopped vehicles, bicy- cles, pedestrians, motorcycles
Approximately 25 to 50 mph (40 to 80 km/h)Approximately 25 to 50 mph (40 to 80 km/h)
Preceding vehicles,
stopped vehicles, bicy- cles, pedestrians, motorcyclesActive steering function
(if equipped):
* to 50
mph (
* to 80 km/h)
Active steering function
(if equipped):
* to 50
mph (
* to 80 km/h)
Detectable objectsVehicle speedOncoming vehicle speedRelative speed between your
vehicle and object
Oncoming vehi- clesApproximately 3 to 25 mph (5 to 40 km/h)Approximately 3 to 45 mph (5 to 75 km/h)Approximately 7
to 70 mph (10 to 115 km/h)
Pedestrians
Approximately 3 to 20 mph (5 to 30 km/h)
-
Approximately 3 to 25 mph (5 to 40 km/h)
Bicycles
Approximately 3 to 20 mph (5 to 30 km/h)
-
Approximately 3 to 30 mph (5 to 50 km/h)
Oncoming motor- cyclesApproximately 3 to 25 mph (5 to 40 km/h)Approximately 3 to 45 mph (5 to 75 km/h)Approximately 7
to 70 mph (10 to 115 km/h)

3115-5. Using the driving support systems
5
Driving
●The hands off steering wheel
warning (P.307) is not operat-
ing.
■Cancelation of functions
In the following situations, opera-
tion of the LCA may be canceled
with the display and buzzer:
●When the operating conditions
(  P.307) are no longer met
●When the system can no longer
detect lane lines
●When the turn signal lever is oper-
ated to the second position
( P.311)
●When the turn signal lever is oper-
ated in the opposite direction of
the lane change
●When the system detects opera-
tion of the steering wheel, brake
pedal or accelerator pedal by the
driver
If the system detects that a vehicle
is quickly approaching in the lane
toward which the turn signal is oper-
ated a buzzer will sound and a mes-
sage will be displayed to alert the
driver. At the same time the steering
wheel may be slightly operated to
help keep the vehicle away from the
approaching vehicle.
■Hands off steering wheel warn-
ing operation
When the system de termines the
driver is not holding the steering
wheel, a message urging the driver
to grip the steering wheel and the
icon shown in the illustration will be
displayed on the multi-information
display to warn the driver. If the sys-
tem detects that the steering wheel
is held, the warning will be can-
celed. When using the system,
make sure to grip the steering wheel
firmly, regardless of whether the
warning is operating or not.
■Situations in which the hands
off steering wheel warning may
not operate properly
●Depending on the condition of the
vehicle, handle control condition
and road surface, the warning
function may not operate.
●In the following situations, the sys-
tem may not be able to detect
when the driver’s hands are off
the steering wheel.
• When a steering wheel cover is installed
• When the driver is wearing gloves
• When foreign matter is attached to the steering wheel
• When the driver is gripping the wood trim, seam of the leather,
spokes, or other part of the steer-
ing wheel that does not have sen-
sors
●In the following situations, the
hands off steering wheel warning
may not operate and the LCA
function may continue operating
even though the driver’s hands
are off the steering wheel:
• When something other than a hand is contacting the steering
wheel
• When a wide object or arms are held across the steering wheel
If the turn signal lever is held in
the first position, the lane
change direction will be dis-
played and the function will
operate.
Operating the LCA

3235-5. Using the driving support systems
5
Driving
rounding conditions
●In the following situations, system
operation may be canceled:
• When the brake control or output restriction control of a driving sup-
port system operates (For exam-
ple: PCS, drive-start control)
• When the system determines that
a detected object has moved
away from the vehicle
• When lane lines can no longer be
detected
• When the brake pedal has been depressed
• When the accelerator pedal has been depressed
• When the steering wheel has
been operated with more than a
certain amount of force
• When the turn signal lever is oper-
ated to the left/right turn position
WARNING
■Situations in which the sys-
tem may not operate properly
●Situations in which the lane may
not be detected: P.291
●When a detectable object stops
immediately before entering the
path of the vehicle
●When passing extremely close
to a detectable object behind a
guardrail, fence, etc.
●When changing lanes while
overtaking a detectable object
●When passing a detectable
object that is changing lanes or
turning left/right
●When there are objects (guard-
rails, power poles, trees, walls,
fences, poles, traffic cones,
mailboxes, etc.) in the surround-
ing area
●When there are patterns or a
painting ahead of the vehicle
that may be mistaken for a
detectable object
●When passing through a place
with a low structure above the
road (tunnel with a low ceiling,
traffic sign, signboard, etc.)
●When driving on snowy, icy, or
rutted roads
●When a detectable object is
approaching your vehicle
●When your vehicle or a detect-
able object is wandering
●When the movement of a
detectable object changes
(change in direction, sudden
acceleration or deceleration,
etc.)
●When suddenly approaching a
detectable object
●When a preceding vehicle or
motorcycle is not directly in front
of your vehicle
●When there is a structure above
a detectable object
●When part of a detectable
object is hidden by another
object (large luggage, umbrella,
guardrail, etc.)
●When multiple detectable
objects are overlapping
●When a bright light, such as the
sun or headlights of another
vehicle, is reflecting off of the
detectable object
●When the detectable object is
white and looks extremely bright
●When the color or brightness of
the detectable object causes it
to blend in with its surroundings
●When a detectable object cuts
in front of or emerges from
beside a vehicle

3275-5. Using the driving support systems
5
Driving
■FCTA system operating condi-
tions
The system will operate when all of
the following conditions are met:
●A shift position other than P or R is
selected
●The vehicle speed is approxi-
mately 10 mph (15 km/h) or less
●A vehicle is approaching from the
left or right in front of your vehicle
at a speed between approximately
7 to 37 mph (10 to 60 km/h)
●There are no vehicles in front of your vehicle
●The accelerator pedal is not being
strongly depressed
●The brake pedal is not being
strongly depressed
■Situations in which the system
may operate even though no
vehicles are approaching
In certain situations, such as the fol-
lowing, the system may operate
even though no vehicles are
approaching:
●When approaching objects on the
roadside, such as guardrails, traf-
fic signs, utility poles, street lights,
trees, tall grass, walls, etc.
●When passing an object on the
side of the road, such as a parked
vehicle
●When a vehicle or pedestrian is
approaching from the left or right
in front of your vehicle in the dis-
tance
●When a vehicle or pedestrian is
moving within a parking spot, etc.,
next to the lane your vehicle is in
●When a pedestrian or bicyclist is
approaching on a sidewalk
●When a vehicle or pedestrian is
moving away from your vehicle
●When an approaching vehicle is
decelerating or stops
●When an approaching vehicle
makes a left/right turn immediately
in front of your vehicle
●When a pedestrian is approaching
your vehicle
●When an oncoming vehicle makes
a right/left turn
●When your vehicle enters an inter-
section before a vehicle
approaching from the left or right
in front of your vehicle
●When stopped at traffic light and a
vehicle approaches from the left
or right in front of your vehicle
●When making a left/right turn in
WARNING
■For safe use
Driving safely is solely the respon-
sibility of the driver. Pay careful
attention to the surrounding con-
ditions in order to ensure safe
driving. The FCTA system is a
supplementary system that
informs the driver of vehicles
approaching from the left and
right of the front of the vehicle.
Over-reliance on this system may
lead to an accident resulting in
death or serious injury. The
details of the warning display may
differ from the actual traffic condi-
tions. Although the warning dis-
play will stop being displayed after
a certain amount of time, this
does not necessarily indicate that
there are no longer any vehicles
or pedestrians around your vehi-
cle.

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

3475-5. Using the driving support systems
5
Driving
formed within a certain amount
of time, the system will enter
warning phase 2.
Vehicles with a driver monitor
camera: Depending on the type
of detection of the driver’s unre-
sponsiveness, the system may
skip warning phase 1 and start
the control of warning phase 2.
After entering warning phase 2,
a buzzer will sound in short
intervals and a message will be
displayed to warn the driver, and
the vehicle will slowly deceler-
ate. If driving operations, such
as holding the steering wheel,
are not performed within a cer-
tain amount of time, the system
will determine that the driver is
not responsive and enter the
deceleration stop phase.
The audio system will be muted
until the driver becomes respon-
sive.
When the vehicle is decelerat-
ing, the brake lights may illumi-
nate, depending on the road
conditions, etc.
After entering the deceleration
stop phase, a buzzer will sound
continuously and a message will
be displayed to warn the driver,
and the vehicle will slowly decel-erate and stop. After the vehicle
stops, the system will enter the
stop and hold phase.
After the vehicle is stopped, the
parking brake will be applied
automatically. After entering the
stop and hold phase, the buzzer
will continue sounding continu-
ously and the emergency flash-
ers (hazard lights) will flash to
warn other drivers of the emer-
gency.
■Restricted functions after the
operation is canceled
After shifting to the deceleration
stop phase, the following functions
will not be available until the hybrid
system is re-started even though
the emergency driving stop system
is canceled:
●LTA
●LCA (if equipped)
●Traffic Jam Assist (if equipped)
Warning phase 2
Deceleration stop phase
Stop hold phase

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