2023 TOYOTA PRIUS PRIME warning light

3135-5. Using the driving support systems
5
Driving
The LDA system warns the
driver if the vehicle may deviate
from the current lane or course
*,
and also can slightly operate the
steering wheel to help avoid
deviation from the lane or
course
*.
The front camera is used to
detect lane lines or a course
*.
*: Boundary between the asphalt and grass, soil, et c., or structures,
such as a curb, guardrail, etc.
■Lane departure alert func-
tion
When the system determines
that the vehicle might depart
from its lane or course
*, a warn-
ing is displayed on a display,
and either a warning buzzer will
sound or the steering wheel will
vibrate to alert the driver.
Check the area around your vehicle
and carefully operate the steering
wheel to move the vehicle back to
the center of the lane or course
*.
Vehicles with BSM: If the system
determines that the vehicle may
collide with a vehicle in an adjacent
lane, the lane de parture alert will
operate even if the turn signals are
operating.
*: Boundary between the asphalt and grass, soil, et c., or structures, such as a curb, guardrail, etc.
■Lane departure prevention
function
If the system determines that
the vehicle is likely to depart
from its lane or course
*, it pro-
vides assistance through steer-
ing wheel operations to help
avoid deviation from the lane or
course.
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, a warning message
may be displayed and a warning
buzzer may sound to alert the
driver.
Vehicles with BSM: If the system
determines that the vehicle may
collide with a vehicle in an adjacent
lane, the lane departure prevention
function will operate even if the turn
signals are operating.
LDA (Lane Departure
Alert)
Basic functions

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

3545-5. Using the driving support systems
*: If equipped
Meter control switches
Turning the Blind Spot Monitor
on/off.
Outside rear view mirror indi-
cators
When a vehicle is detected in a
blind spot of the outside rear view
mirrors or approaching rapidly from
behind into a blind spot, the outside
rear view mirror indicator (P.152)
on the detected side will illuminate.
If the turn signal lever is operated
toward the detected side, the out-
side rear view mirror indicator will
flash and a buzzer will sound.
Driving assist information
indicator
Illuminates when the Blind Spot
Monitor is turned off. At this time, a
message will be displayed on the
multi-informat ion display.
■Outside rear view mirror indica-
tor visibility
In strong sunlight, the outside rear
view mirror indicator may be difficult
to see.
■Buzzer
If the volume setting of the audio
system is high or the surrounding
area is loud, it may be difficult to
BSM (Blind Spot Moni-
tor)*
The Blind Spot Monitor is a
system that uses rear side
radar sensors installed on
the inner side of the rear
bumper on the left and right
side to assist the driver in
confirming safety when
changing lanes.
WARNING
■Cautions regarding the use of
the system
●The driver is solely responsible
for safe driving. Always drive
safely, taking care to observe
your surroundings.
●The Blind Spot Monitor is a sup-
plementary function which alerts
the driver that a vehicle is in a
blind spot of the outside rear
view mirrors or is approaching
rapidly from behind into a blind
spot. Do not overly rely on the
Blind Spot Monitor. As the func-
tion cannot judge if it is safe to
change lanes, over reliance
could lead to an accident result-
ing in death or serious injury. As
the system may not function
correctly under certain condi-
tions, the driver’s own visual
confirmation of safety is neces-
sary.
System components
A
B
C

3555-5. Using the driving support systems
5
Driving
hear the buzzer.
■Customization
Some functions can be customized.
(  P.618)
The Blind Spot Monitor can be
enabled/disabled through a cus-
tomize setting. ( P.618)
When the Blind Spot Monitor is
off, the driving assist information
indicator ( P.152) will illumi-
nate and a message will be dis-
played on the multi-information
WARNING
■To ensure the system can
operate properly
Blind Spot Monitor sensors are
installed behind the left and right
sides of the rear bumper respec-
tively. Observe the following to
ensure the Blind Spot Monitor can
operate correctly.
●Keep the sensors and the sur-
rounding areas on the rear
bumper clean at all times.
If a sensor or its surrounding
area on the rear bumper is dirty
or covered with snow, the Blind
Spot Monitor may not operate
and a warning message will be
displayed. In this situation, clear
off the dirt or snow and drive the
vehicle with the operation condi-
tions of the BSM function
(  P.357) satisfied for approxi-
mately 10 minutes. If the warn-
ing message does not
disappear, have the vehicle
inspected by your Toyota
dealer.
●Do not attach accessories,
stickers (including transparent
stickers), aluminum tape, etc. to
a sensor or its surrounding area
on the rear bumper.
●Do not paint the surrounding
area of a sensor on the rear
bumper.
●Do not subject a sensor or its
surrounding area on the rear
bumper to a strong impact.
If a sensor is moved even
slightly off position, the system
may malfunction and vehicles
may not be detected correctly.
In the following si tuations, have
your vehicle inspected by your
Toyota dealer.
• A sensor or its surrounding area is subject to a strong impact.
• If the surrounding area of a sen- sor is scratched or dented, or
part of them has become dis-
connected.
●Do not disassemble the sensor.
●Do not modify the sensor or sur-
rounding area on the rear
bumper.
●If a sensor or the rear bumper
needs to be removed/installed
or replaced, contact your
Toyota dealer.
●The sensors are likely to be
affected by paint on the rear
bumper. If the rear bumper is
not repaired correctly, the Blind
Spot Monitor may not operate
with a warning message dis-
played. If any paint repair is
needed, contact your Toyota
dealer.
Turning the Blind Spot
Monitor on/off

3605-5. Using the driving support systems
that the system has operated. After
the notification through voice guid-
ance is made, no more voice guid-
ance notifications will be made
again until the door is fully closed.
■Outside rear view mirror indica-
tor visibility
In strong sunlight, the outside rear
view mirror indicator may be difficult
to see.
■Buzzer
If the volume setting of the audio
system is high or the surrounding
area is loud, it may be difficult to
hear the buzzer.
■Voice notifications
In the following situations, voice
notifications will not be output:
●When it is estimated that no occu-
pants are on board*
●After opening a door and entering
the vehicle, until the hybrid system
is started
●When 3 minutes or more have
elapsed since the hybrid system
was stopped
●When the language setting of the
Multimedia Display has been set
to a language that does not sup-
port voice notifications
●When all of the doors have been
locked from outside the vehicle
●When a door remains open for 1
minute or more after the hybrid
system is stopped
●When the ACC mode ( P.618)
has been enabled through a cus- tomize setting on the Multimedia
Display and the hybrid system has
been stopped
●When the parking assist volume
setting on the Multimedia Display
has been set to off
*: For each seating position, judg-
ment is made based on the open-
ing and closing of a door, before
driving for ingress and after driv-
ing for egress.
■Customization
Some functions can be customized.
(  P.618)
The safe exit assist system can
be enabled/disabled through a
customize setting. ( P.618)
When the safe exit assist is off,
the driving assist information
indicator will illuminate and a
message will be displayed on
the multi-information display.
Each time the power switch is
turned to ON, the safe exit
assist is enabled.
■Objects that can be detected by the safe exit assist
When the safe exit assist detects the following vehicles or bicycles
behind your vehicle using a rear si de radar sensor, the occupants of
the vehicle are informed through an outside rear view mirror indica-
WARNING
■To ensure the system can
operate properly
 P.355
Turning the safe exit
assist system ON/OFF
Safe exit assist operation