2023 TOYOTA PRIUS PRIME driver monitor

2885-5. Using the driving support systems
WARNING
●If the part of the windshield in
front of the front camera is
fogged up or covered with con-
densation or ice, use the wind-
shield defogger to remove the
fog, condensation, or ice.
●If water droplets cannot be
properly removed from the area
of the windshield in front of the
front camera by the windshield
wipers, replace the wiper insert
or wiper blade.
●Do not attach window tint to the
windshield.
●Replace the windshield if it is
damaged or cracked.
If the windshield has been
replaced, recalibration of the front
camera will be necessary. For
details, contact your Toyota
dealer.
●Do not allow liqui ds to contact
the front camera.
●Do not allow bright lights to
shine into the front camera.
●Do not damage the lens of the
front camera or allow it to
become dirty.
When cleaning the inside of the
windshield, do not allow glass
cleaner to contact the lens of the
front camera. Do not touch the
lens of the front camera.
If the lens of the front camera is
dirty or damaged, contact your
Toyota dealer.
●Do not subject the front camera
to a strong impact.
●Do not change the position or
orientation of the front camera
or remove it.
●Do not disassemble the front
camera.
●Do not modify any parts around
the front camera, such as the
inside rear view mirror or ceil-
ing.
●Do not attach accessories
which may obstruct the front
camera to the hood, front grille,
or front bumper. For details,
contact your Toyota dealer.
●If a surfboard or other long
object is to be mounted on the
roof, make sure that it will not
obstruct the front camera.
●Do not modify or change the
headlights and other lights.
■Front camera installation area
on the windshield
If the system determines that the
windshield may be fogged up, it
will automatically operate the
heater to defog the part of the
windshield around the front cam-
era. When cleaning, etc., be care-
ful not to touch the area around
the front camera until the wind-
shield has cooled sufficiently, as
touching it may cause burns.
■Precautions for the driver
monitor camera (if equipped)
Observe the following precau-
tions.
Failure to do so may lead to mal-
function of the driver monitor cam-
era and the systems not operating
properly, possibly leading to an
accident resulting in death or seri-
ous injury.

2895-5. Using the driving support systems
5
Driving
■Precautions for use
It is necessary to enter a connected
services contract, provided by
Toyota, to use these functions. For
details, contact your Toyota dealer.
●LCA (Lane Change Assist)
 P.310
●Radar Cruise Control: Extended
resume time
 P.331
●Traffic Jam Assist
 P.348
■Situations in which the sensors
may not operate properly
●When the height or inclination of
the vehicle has been changed due
to modifications
●When the windshield is dirty,
fogged up, cracked or damaged
●When the ambient temperature is
high or low
●When mud, water, snow, dead
insects, foreign matter, etc., is
attached to the front of the sensor
●When in inclement weather such
as heavy rain, fog, snow, or a
sandstorm
●When water, snow, dust, etc. is
thrown up in front of the vehicle, or
when driving through mist or
smoke
●When the headlights are not illu-
minated while driving in the dark,
such as at night or when in a tun-
nel
●When the lens of a headlight is
dirty and illumination is weak
●When the headlights are mis-
aligned
●When a headlight is malfunction-
ing
●When the headlights of another
vehicle, sunlight, or reflected light
shines directly into the front cam-
era
●When the brightness of the sur-
rounding area changes suddenly
●When driving near a TV tower,
broadcasting station, electric
power plant, radar equipped vehi-
cles, etc., or other location where
WARNING
●Do not subject the driver moni-
tor camera or its surrounding
area to strong impact.
If subjected to a strong impact,
the driver monitor camera may
move out of alignment and the
driver may no longer be detected
correctly. In this case, have the
vehicle inspected by your Toyota
dealer.
●Do not disassemble or modify
the driver monitor camera.
●Do not attach accessories,
stickers (including transparent
stickers), etc. to the driver moni-
tor camera or its surrounding
area.
●Do not allow the driver monitor
camera or its surrounding area
to get wet.
●Do not cover the driver monitor
camera or place anything in
front of it.
●Keep the lens of the driver mon-
itor camera free from damage.
●Do not touch the lens of the
driver monitor came ra or allow it
to become dirty.
When there is dirt or fingerprints
on the camera lens, clean it with a
dry, soft cloth so as to not mark or
damage it.
●When cleaning the lens, do not
use detergents or organic sol-
vents that may damage plastic.

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

2925-5. Using the driving support systems
●When the driver is wearing a face
mask
●When the driver is laughing or
their eyes are only slightly open
●When the driver’s eyes, nose,
mouth, or shape of their face is
blocked
●When the driver is wearing
makeup which makes it difficult to
detect their eyes, nose, mouth, or
shape of their face
●When the driver’s eyes are
blocked by the frame of eye-
glasses, sunglasses, hair, etc.
●When there is a device inside the
vehicle that radiates near infrared
rays, such as a non-genuine
driver monitoring system.
*: If equipped
During controlled driving, the
driver monitor camera detects
the position and direction the
driver is facing, and whether
their eyes are opened or closed.
Through this, the system deter-
mines if the driver is checking
their surroundings and if the
driver can perform driving oper-
ations.
■Warning function
In situations such as the follow-
ing, a buzzer will sound and a
message will be displayed to
warn the driver.
 When the system determines
that the driver is not paying
attention to the road or their
eyes are closed
 When the driver’s face cannot
be detected or the system
determines that the driver has
poor driving posture
Driver monitor*
Basic functions

2935-5. Using the driving support systems
5
Driving
■Warning function
These functions may not operate
when the vehicle speed is low.
■Situations in which the driver
monitor may not operate prop-
erly
 P.291
The settings of Driver monitor
can be changed through cus-
tomize settings. ( P.626)
WARNING
■For safe use
●The driver monitor is not
designed to prevent the driver
from driving carelessly or hav-
ing a poor driving posture. Pay
careful attention to the sur-
rounding conditions in order to
ensure safe driving.
●The driver monitor cannot
reduce drowsiness. If you feel
unable to concentrate or
drowsy, take a break and sleep
as necessary in order to ensure
safe driving.
Changing Driver monitor
settings
PCS (Pre-Collision Sys-
tem)
The pre-collision system
uses sensors to detect
objects ( P.294) in the path
of the vehicle. When the
system determines that the
possibility of a frontal colli-
sion with a detectable
object is high, a warning
operates to urge the driver
to take evasive action and
the potential brake pressure
is increased to help the
driver avoid the collision. If
the system determines that
the possibility of a collision
is extremely high, the
brakes are automatically
applied to help avoid the
collision or help reduce the
impact of the collision.
The pre-collision system can
be disabled/enabled and the
warning timing can be
changed. ( P.304)

3055-5. Using the driving support systems
5
Driving
active steering function) tim-
ing will also be changed.
When later is selected, the
emergency steering assist
(excluding the active steering
function) will not operate in most
cases.
 Vehicles with a driver monitor
camera: When the system
determines that the driver is
not facing forward, the pre-
collision warning and emer-
gency steering assist will
operate at the earlier timing,
regardless of the user setting.
 When the dynamic radar
cruise control is operating, the
pre-collision warning will
operate at the earlier timing,
regardless of the user setting.
 Vehicles with Traffic Jam
Assist: When the Traffic Jam
Assist is operating, the pre-
collision warning will operate
at the earlier timing, regard-
less of the user setting. 
When driving on a road with
clear lane lines with the
dynamic radar cruise control
operating, lane lines and pre-
ceding and surrounding vehi-
cles are detected using the
front camera and radar sen-
sor, and the steering wheel is
operated to maintain the vehi-
cle’s lane position.
Use this function only on highways
and expressways.
If the dynamic radar cruise control
is not operating, the function will not
operate.
In situations where the lane lines
are difficult to see or are not visible,
such as when in a traffic jam, sup-
port will be provi ded using the path
of preceding and surrounding vehi-
cles.
If the system determines that the
steering wheel has not been oper-
ated for a certain amount of time or
the steering wheel is not being
firmly gripped, the driver will be
alerted and this function will be
temporarily canceled.
If the steering wheel is firmly
gripped, the f unction will begin
operating again.
LTA (Lane Tracing
Assist)
LTA functions

3155-5. Using the driving support systems
5
Driving
the following conditions are met:
• The vehicle speed is approxi-mately 30 mph (50 km/h) or more.
Operation may be possible when
the vehicle speed is approximately
25 mph (40 km/h) or more if vehi-
cles, motorcycles, bicycles, or
pedestrians are detected near the
lane.
• The system recognizes a lane or course
*. (When recognized on
only one side, the system will
operate only for the recognized
side.)
• The lane width is approximately
9.8 ft. (3 m) or more.
• The turn signal lever is not being operated.
(Vehicles with BSM: Except when a
vehicle is detected in the direction
that the turn signal lever is oper-
ated.)
• The vehicle is not being driven around a sharp curve.
• The vehicle is not accelerating or
decelerating more than a certain
amount.
• The steering wheel is not being turned sufficiently to perform a
lane change.
• When the VSC or TRAC system is not turned off
*: Boundary between the asphalt
and grass, soil, etc., or structures,
such as a curb, guardrail, etc.
■Temporary cancellation of func-
tions
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 function
will automatically be restored.
(  P.314)
■Operation of the lane departure
alert function/lane departure
prevention function
●Depending on the vehicle speed, road conditions, lane departure
angle, etc., operation of the lane
departure prevention function may
not be felt or the function may not
operate.
●Depending on the conditions, the
warning buzzer may operate even
if vibration is selected through a
customize setting.
●If a course* is not clear or straight,
the lane departure alert function or
lane departure prevention function
may not operate.
●The lane departure alert function
or lane departure prevention func-
tion may not operate if the system
judges that the vehicle is inten-
tionally being steered to avoid a
pedestrian or parked vehicle.
●Vehicles with BSM: It may not be
possible for the sys tem to judge if
there is danger of a collision with a
vehicle in an adjacent lane.
●Vehicles with a driver monitor
camera: Depending on the driver
condition, the lane departure alert
function or lane departure preven-
tion function changes the timing of
operation.
●The steering assist operation of
the lane departure prevention
function can be overridden by the
steering wheel operation of the
driver.
*: Boundary between the asphalt
and grass, soil, etc., or structures,
such as a curb, guardrail, etc.
■Hands off steering wheel warn-
ing operation
In the following si tuations, a mes-
sage urging the driver to operate the
steering wheel and an icon will be
displayed and a buzzer will sound to
warn the driver. When using the
system, make sure to grip the steer-
ing wheel firmly, regardless of
whether the warning is operating or
not.

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