2023 TOYOTA PRIUS PRIME wheel

3165-5. Using the driving support systems
●When the system determines that
the driver is not securely holding
the steering wheel, or the steering
wheel is not being operated when
the steering assist operation of the
lane departure prevention function
is operating
Except for Puerto Rico: The length
of time that the warning buzzer
operates will become longer as the
frequency of the steering assist
operating increase s. If the system
judges that the steering wheel has
been operated, the warning buzzer
will stop.
For Puerto Rico: The length of time
that the warning buzzer operates
will become longer as the frequency
of the steering assist operating
increases. Even if the system
judges that the steering wheel has
been operated, the warning buzzer
will sound for a certain amount of
time.
■Break suggestion function
This function is operable when all of
the following conditions are met:
●The vehicle speed is approxi-
mately 40 mph (65 km/h) or
more.
*1
●The vehicle speed is approxi-
mately 32 mph (50 km/h) or
more.
*2
●The lane width is approximately
9.8 ft. (3 m) or more.
Depending on the condition of the
vehicle and road surface, the break suggestion function may not oper-
ate.
Press the meter control switch
to turn off the message.
*1
Unless is pressed, the message
of the break suggestion function will
remain displayed.
*1
*1
: For Puerto Rico
*2: Except for Puerto Rico
 The LDA system can be
enabled/disabled through a
customize setting. ( P.627)
 The settings of the LDA can
be changed on the customize
settings. ( P.627)
Changing LDA settings
WARNING
■Situations in which the sys-
tem may not operate properly
In the following situations, the
system may not operate properly
and the vehicle may depart from
its lane. Do not overly rely on
these functions. The driver is
solely responsible for paying
attention to their surroundings
and operating the steering wheel
as necessary to ensure safety.

3205-5. Using the driving support systems
PDA (Proactive driv-
ing assist)
When a detectable object
(P.321) is detected, the
proactive driving assist
operates the brakes and
steering wheel to help pre-
vent the vehicle from
approaching too close to
the object.
WARNING
■For safe use
Driving safely is solely the respon-
sibility of the driver.
●The proactive driving assist is
designed to provide some
assistance for regular braking
and steering operations, as well
as helping to prevent the vehicle
from approaching too close to a
detectable object. However, the
scope of this assistance is lim-
ited.
The driver should perform brake
and steering operations as neces-
sary. Read the following items
carefully. Do not overly rely on the
proactive driving assist and
always drive carefully. ( P.323)
●The proactive driving assist is
not a system which reduces the
amount of attention necessary
for safe driving. Even if the sys-
tem is operating correctly, the
surrounding conditions as rec-
ognized by the driver and
detected by the system may dif-
fer. It is necessary for the driver
to pay attention, assess risks,
and ensure safety. Over-reli-
ance on this system to drive the
vehicle safely may lead to an
accident resulting in death or
serious injury.
●Proactive driving assist is not a
system which allows for inatten-
tive driving and is not a system
which assists in poor visibility
conditions. The driver is solely
responsible for paying attention
to their surroundings and driving
safely.
■When turning proactive driv-
ing assist off
●Situations in which the sensors
may not operate properly:
 P.323
●When it is necessary to disable
the system: P.284

3215-5. Using the driving support systems
5
Driving
According to the driving conditions, the operation and detectable
objects of the proactive driving assist will change as follows.
System operating conditions and detectable objects
FunctionConditionsOperationDetectable
objects
Obstacle Antici-pation Assist (OAA)
A detectable
object is detected crossing the road
Assistance with
some brake oper- ations is pro-
vided in order to
reduce the possi- bility of a colli- sion.
Pedestrians
 Bicyclists
A detectable
object is detected on the side of the road
Assistance with
some brake and steering wheel operations are
provided accord- ing to the sur- rounding
conditions to help prevent the vehi- cle from
approaching too close to a
detected object.
 Pedestrians
 Bicyclists
 Parked vehicles
Assistance with
steering wheel
operations is pro- vided within a
range that the
vehicle will not
deviate from its current lane.

3225-5. Using the driving support systems
■Vehicle speeds at which the
system can operate
●Detectable object crossing the
road assistance
Approximately 20 to 35 mph (30 to
60 km/h)
●Detectable object on the side of
the road assistance
Approximately 20 to 35 mph (30 to
60 km/h)
●Preceding vehicle deceleration
assistance
Approximately 15 mph (20 km/h) or
more
●Curve deceleration assistance
Approximately 15 mph (20 km/h) or
more
●Steering assist within a lane Approximately 5 to 80 mph (10 to
140 km/h)
■System operation will be can-
celed when
●In the following situations, system
operation will be canceled:
• When the dynamic radar cruise control or cruise control is operat-
ing
• When the PCS is off
• Situations in which some or all of the functions of the system cannot
operate: P.291
• When the P, R or N shift position
is selected
●In the following situations, the
brake operation assist will be can-
celed:
• Approximately 9 mph (15 km/h) or less
• When a certain vehicle speed has been reached, as judged by the
system, accordin g to the sur-
Deceleration
Assist (DA)
A preceding vehi-
cle or an adjacent vehicle cutting in front of the vehi- cle is detected
The vehicle is
gently deceler-
ated so that the vehicle-to-vehi-
cle distance will not be exces-sively short.
 Preceding vehi-
cles
 Motorcycles
A curve is
detected ahead of the vehicle
The vehicle is
gently deceler-
ated if the vehicle speed is deter-
mined to be too
high for the curve ahead.
None
Steering Assist (SA)Lane is detected
The system antic-ipates the driver’s operation and supports the
operation of the steering wheel.
None
FunctionConditionsOperationDetectable objects

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

3245-5. Using the driving support systems
The proactive driving assist
can be enabled/disabled
through a customize setting.
( P.627)
 The settings of the proactive
driving assist can be changed
through customize settings.
( P.627)
Depending on the situation, the following indicators or icons will be
displayed.
Some icons cannot be displayed unless the display is changed to
the driving safety support function information screen.
WARNING
●When approaching a vehicle
ahead which is perpendicular or
at an angle to the vehicle, or is
facing the vehicle
●If a parked vehicle is perpendic-
ular or at an angle to the vehicle
●When a bicycle is a child sized
bicycle, is carrying a large load,
is carrying an extra passenger,
or has an unusual shape (bicy-
cles equipped with a child seat,
tandem bicycles, etc.)
●When a pedestrian or bicyclist is
shorter than approximately 3.2
ft. (1 m) or taller than approxi-
mately 6.5 ft. (2 m)
●When the silhouette of a pedes-
trian or bicyclist is unclear (such
as when they are wearing a
raincoat, long skirt, etc.)
●When a pedestrian or bicyclist is
bending forward or squatting
●When a pedestrian or bicyclist is
moving at high speed
●When a pedestrian is pushing a
stroller, wheelchair, bicycle or
other vehicle
●When a detectable object
blends in with the surrounding
area, such as when it is dim (at
dawn or dusk) or dark (at night,
in a tunnel, etc.)
●When the lane width is 13.1 ft.
(4 m) or more
●When the lane width is 8.2 ft.
(2.5 m) or less
●When the vehicle has not been
driven for a certain amount of
time after the hybrid system was
started
●While turning left or right or a
few seconds after turning left or
right
●While changing lanes or a few
seconds after changing lanes
●When entering a curve, driving
around a curve and a few sec-
onds after driving around a
curve
Changing proactive driv-
ing assist settings
System operation display

3255-5. Using the driving support systems
5
Driving
■Hands off steering wheel warn-
ing operation
In the following situations, a mes-
sage urging the driver to grip the
steering wheel and the icon shown
in the illustration will be displayed on
the display to warn the driver. If the system detects that the steering
wheel is held, the warning will be
canceled. When using the system,
make sure to grip the steering wheel
firmly, regardless of whether the
warning is operating or not.
IconMeaning

White: Monitoring for detectable
objects
 Green: Detectable object crossing
the road or detectable object on
the side of the road assistance
operating
A pedestrian has been detected as
crossing the road or on the side of
the road and brake or steering assis-
tance is operating
A vehicle has been detected on the
side of the road and brake or steer-
ing operation assistance is being
performed
Steering operation assistance is
being performed to prevent the
vehicle from approaching too close
to a detectable object on the side
of the road
 When the steering assist is operat-
ing
Preceding vehicle deceleration
assistance is being performed
Warning to maintain appropriate
vehicle-to-vehicle distance
Curve deceleration assistance is
being performed

3265-5. Using the driving support systems
●When assistance to a detectable
object crossing the road or assis-
tance to a detectable object on the
side of the road is performed and
the system determines the driver
is not holding the steering wheel
If no operations are detected for a
certain amount of time, a buzzer will
sound, the warning will operate.
This warning may also operate if the
driver only operates steering wheel
a small amount continuously.
■Warning operation after preced-
ing vehicle deceleration assis-
tance has ended
After preceding vehicle decelera-
tion assistance has ended, if the
driver does not operate the brake
pedal or accelerator pedal and the
vehicle approaches the preceding
vehicle, the display will flash and a
buzzer will sound to urge the driver
to decelerate. If the system deter-
mines that the driver is operating the
brake pedal or accelerator pedal,
the warning will be canceled.
*: If equipped
 When the system detects a
vehicle approaching from the
left or right in front of your
vehicle when approaching an
intersection, a notification will
be displayed.
 When the system determines
that your vehicle may be
about to enter an intersection
even though a vehicle is
approaching from the left or
right in front of your vehicle, a
buzzer will sound and a mes-
sage will be displayed to urge
you to depress the brake
pedal.
• Multi-information display
FCTA (Front Cross
Traffic Alert)*
When approaching an inter-
section, etc., at a low speed,
vehicles approaching from
the left and right of the front
of the vehicle can be
detected and the driver
informed of these vehicles.
FCTA system control