2023 TOYOTA PRIUS PRIME Face ID

3085-5. Using the driving support systems
vehicle, handle control condition
and road surface, the warning
function may not operate.
●Vehicles with LCA: In the following
situations, the system 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 pa rt of the steer-
ing wheel that does not have sen-
sors
●Vehicles with LCA: In the following
situations, the hands off steering
wheel warning may not operate
and the LTA function may con-
tinue 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
The LTA will change between
ON/OFF each time the LTA
switch is pressed.
When the LTA is ON, the LTA indi-
cator will illuminate.
Enabling/disabling the
system
WARNING
■Situations in which the func-
tions may not operate prop-
erly
In the following situations, the
functions may not operate prop-
erly 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.
●When a preceding or surround-
ing vehicle changes lanes (Your
vehicle may follow the preced-
ing or surrounding vehicle and
also change lanes)
●When a preceding or surround-
ing vehicle is swaying (Your
vehicle may sway accordingly
and depart from the lane)
●When a preceding or surround-
ing vehicle departs from a lane
(Your vehicle may follow the
preceding or surrounding vehi-
cle and also depart from the
lane)
●When a preceding or surround-
ing vehicle is being driven
extremely close to the left/right
lane line (Your vehicle may fol-
low the preceding or surround-
ing vehicle accordingly and
depart from the lane)

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

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.

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

3585-5. Using the driving support systems
adjacent lane at a much higher
speed than it*
*
: Depending on the situations, a buzzer may sound.
■Conditions under which the
system may not function cor-
rectly
●The Blind Spot Monitor may not
detect vehicles correctly in the fol-
lowing situations:
• When the sensor is misaligned
due to a strong impact to the sen-
sor or its surrounding area
• When mud, snow, ice, a sticker,
etc. is covering the sensor or sur-
rounding area on the rear bumper
• When driving on a road surface
that is wet with standing water
during bad weather, such as
heavy rain, snow, or fog
• When multiple vehicles are approaching with only a small gap
between each vehicle
• When the distance between your vehicle and a following vehicle is
short
• When there is a significant differ- ence in speed between your vehi-
cle and the vehicle that enters the
detection area
• When the difference in speed between your vehicle and another
vehicle is changing
• When a vehicle enters a detection area traveling at about the same
speed as your vehicle
• As your vehicle starts from a stop, a vehicle remains in the detection
area
• When driving up and down con- secutive steep inclines, such as
hills, dips in the road, etc.
• When driving on roads with sharp bends, consecutive curves, or
uneven surfaces
• When vehicle lanes are wide, or when driving on the edge of a
lane, and the vehicle in an adja-
cent lane is far away from your
vehicle
• When an accessory (such as a
bicycle carrier) is installed to the rear of the vehicle
• When there is a significant differ- ence in height between your vehi-
cle and the vehicle that enters the
detection area
• Immediately after the Blind Spot
Monitor is turned on
• When towing with the vehicle●Instances of the Blind Spot Moni-
tor unnecessarily detecting a vehi-
cle and/or object may increase in
the following situations:
• When the sensor is misaligned due to a strong impact to the sen-
sor or its surrounding area
• When the distance between your vehicle and a guardrail, wall, etc.
that enters the detection area is
short
• When driving up and down con-
secutive steep inclines, such as
hills, dips in the road, etc.
• When vehicle lanes are narrow, or
when driving on the edge of a
lane, and a vehicle traveling in a
lane other than the adjacent lanes
enters the detection area
• When driving on roads with sharp bends, consecutive curves, or
uneven surfaces
• When the tires are slipping or spinning
• When the distance between your vehicle and a following vehicle is
short
• When an accessory (such as a bicycle carrier) is installed to the
rear of the vehicle
• When towing with the vehicle

3625-5. Using the driving support systems
door)
■Conditions under which the
system will not detect a vehicle
●Safe exit assist does not detect
the following objects, vehicles,
and bicycles:
• Vehicles or bicycles which are
approaching slowly
*
• Vehicles or bicycles which are determined to have a low possibil-
ity of colliding with a door (other
than the back door) when opened
*
• Vehicles or bicycles which are
approaching from directly behind*
• Vehicles or bicycles which are approaching from the front*
• Guardrails, walls , signs, parked
vehicles, and other stationary
objects
*
• Pedestrians, animals, etc.*
*
: Depending on the conditions, detection of a vehicle and/or
object may occur.
●In situations such as the following,
safe exit assist will not operate:
• When 3 minutes or more have elapsed since the hybrid system
off (the time which operation is
possible may be extended if a
door is opened and closed)
• When your vehicle is not com- pletely stopped
■Conditions under which the
system may not function cor-
rectly
●The safe exit assist may not
detect vehicles correctly in the fol-
lowing situations:
• When the sensor is misaligned
due to a strong impact to the sen-
sor or its surrounding area
• When mud, snow, ice, a sticker,
etc. is covering the sensor or sur-
rounding area on the rear bumper
• When driving on a road surface that is wet with standing water
during bad weather, such as
heavy rain, snow, or fog
• When a vehicle or bicycle approaches from behind a nearby
parked vehicle
• When an approaching vehicle or
bicycle suddenly changes direc-
tion
• Immediately after a vehicle or
bicycle starts moving
• When the back door is open
• When a bicycle carrier, ramp, or other accessory is installed to the
back of the vehicle
• When a parked vehicle, wall, sign,
person or other stationary object
is behind the vehicle
• When the vehicle is stopped at an
angle to the road
• When a vehicle is traveling near an approaching vehicle or bicycle
• When an approaching vehicle or bicycle is traveling along a station-
ary object, such a wall or sign
• When a vehicle or bicycle is approaching at high speed
• When towing with the vehicle
• When stopped on a steep slope
• When stopped on a curve or at the exit of a curve
●Instances of the safe exit assist
unnecessarily detecting a vehicle
and/or object may increase in the
following situations:
• When the sensor is misaligned
due to a strong impact to the sen-
sor or its surrounding area
• When a vehicle or bicycle
approaches from behind your
vehicle at an angle
• When the vehicle is stopped at an
angle to the road
• When a vehicle or bicycle approaches from behind a parked
vehicle at an angle
• When a parked vehicle, wall, sign, person or other stationary object
is behind the vehicle
• When an approaching vehicle or bicycle suddenly changes direc-
tion
• When an approaching vehicle or bicycle is traveling along a station-
ary object, such a wall or sign
• When the back door is open
• When a bicycle carrier, ramp, or other accessory is installed to the

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.

3765-5. Using the driving support systems
cle*
●The distance between the sensor
and approaching vehicle gets too
close
*: Depending on the conditions, detection of a vehicle and/or
object may occur.
■Situations in which the system
may not operate properly
The RCTA function may not detect
vehicles correctly in the following
situations:
●When the sensor is misaligned
due to a strong impact to the sen-
sor or its surrounding area
●When mud, snow, ice, a sticker,
etc., is covering the sensor or sur-
rounding area on the position
above the rear bumper
●When driving on a road surface
that is wet with standing water
during bad weather, such as
heavy rain, snow, or fog
●When multiple vehicles are
approaching with only a small gap
between each vehicle
●When a vehicle is approaching at
high speed
●When equipment that may
obstruct a sensor is installed, such
as a towing eyelet, bumper pro-
tector (an additional trim strip,
etc.), bicycle carrier, or snow plow
●When backing up on a slope with
a sharp change in grade
●When backing out of a sharp
angle parking spot
●Immediately after the RCTA func-
tion is turned on
●Immediately after the hybrid sys-
tem is started with the RCTA func-
tion on
●When the sensors cannot detect a
vehicle due to obstructions
●When towing with the vehicle
●When there is a significant differ-
ence in height between your vehi-
cle and the vehicle that enters the
detection area
●When a sensor or the area around
a sensor is extremely hot or cold
●If the suspension has been modi-
fied or tires of a size other than
specified ar e installed
●If the front of the vehicle is raised
or lowered due to the carried load
●When turning while backing up