2023 TOYOTA PRIUS PRIME Owners Manual

3375-5. Using the driving support systems
5
Driving
• If the vehicle speed is set while driving at a speed that exceeds
the system’s upper limit, the set
vehicle speed will be the system’s
upper limit.
■Accelerating after setting the
vehicle speed
As with normal driving, acceleration
can be performed by depressing the
accelerator pedal. After accelerat-
ing, the vehicle will return to the set
vehicle speed. However, while in
vehicle-to-vehicle distance control
mode, the vehicle speed may
decrease to below the set vehicle
speed in order to maintain the dis-
tance from the preceding vehicle.
■When the vehicle is stopped by
system control during follow-up
cruising
●When the “RES” switch is pressed
while the vehicle is stopped by
system control, if the preceding
vehicle starts off within approxi-
mately 3 seconds, follow-up cruis-
ing will resume.
●If the preceding vehicle starts off
within approximately 3 seconds of
the vehicle being stopped by sys-
tem control, follo w-up cruising will
resume.
■Automatic cancellation of vehi-
cle-to-vehicle distance control
mode
In the following situations, vehicle-
to-vehicle distance control mode will
be canceled automatically:
●When the brake control or output
restriction control of a driving sup-
port system operates
(For example: Pre-Collision Sys-
tem, drive-start control)
●When the parking brake has been
operated
●When the vehicle is stopped by
system control on a steep incline
●When any of the following are
detected while the vehicle is
stopped by system control: • The driver’s seat belt is unfas-
tened
• The driver’s door is opened
• Approximately 3 minutes have
elapsed since the vehicle was
stopped
The parking brake may be actived
automatically.
●Situations in which some or all of
the functions of the system cannot
operate: P.291
■Dynamic radar cruise control
system warning messages and
buzzers
For safe use: P.284
■Preceding vehicles that the sen-
sor may not detect correctly
In the following situations, depend-
ing on the conditions, if the system
cannot provide sufficient decelera-
tion or acceleration is necessary,
operate the brake pedal or accelera-
tor pedal.
As the sensor may not be able to
correctly detect these types of vehi-
cles, the approach warning
(  P.338) may not operate.
●When a vehicle cuts in front of
your vehicle or changes lanes
away from your vehicle extremely
slowly or quickly
●When changing lanes
●When a preceding vehicle is driv-
ing at a low speed
●When a vehicle is stopped in the
same lane as the vehicle
●When a motorcycle is traveling in
the same lane as the vehicle
■Conditions under which the
system may not operate cor-
rectly
In the following situations, operate
the brake pedal (or accelerator
pedal, depending on the situation)
as necessary.
As the sensor may not be able to
correctly detect a vehicle, the sys-
tem may not operate properly.

3385-5. Using the driving support systems
●When a preceding vehicle brakes
suddenly
●When changing lanes at low
speeds, such as in a traffic jam
■Conditions for extended
resume time (Vehicles with
Traffic Jam Assist)
Extended resume ti me is activated
when all of the following conditions
are satisfied:
●The connected service that
Toyota provides is subscribed to.
Contact your Toyota dealer for
details.
●The vehicle is driving on a vehicle-
only road, such as an express-
way.
●There is a preceding vehicle and
the system is able to detect it.
●No vehicle interruptions occur.
●The preceding vehicle has not
been replaced.
●Clearance sonar and FCTA are
not detecting the object in front of
you.
●The driver monitor judges that the
driver is looking forward.
●The steering wheel has not been
operated.
●The brake pedal has not been
operated.
In situations where the vehicle
approaches a preceding vehicle
and the system cannot provide
sufficient deceleration, such as
if a vehicle cuts in front of the
vehicle, a warning display will
flash and a buzzer will sound to
alert the driver. Depress the
brake pedal to ensure appropri-
ate vehicle-to-vehicle distance.
■Warnings may not occur
when
In the following situations, the
warning may not operate even
though the vehicle-to-vehicle
distance is short.
 When the preceding vehicle is
traveling at the same speed
or faster than your vehicle
 When the preceding vehicle is
traveling at an extremely low
speed
 Immediately after the vehicle
speed has been set
 When the accelerator pedal is
depressed
When a curve is detected, the
vehicle speed will begin being
reduced. When the curve ends,
the vehicle speed reduction will
end.
Depending on the situation, the
vehicle speed will then return to the
set vehicle speed.
In situations where vehicle-to-vehi-
cle distance control needs to oper-
ate, such as when a preceding
vehicle cuts in front of your vehicle,
the curve speed reduction function
will be canceled.
Approach warning
Curve speed reduction
function

3395-5. Using the driving support systems
5
Driving
■Situations in which the curve
speed reduction function may
not operate
In situations such as the following,
the curve speed reduction function
may not operate:
●When the vehicle is being driven
around a gentle curve
●When the accelerator pedal is
being depressed
●When the vehicle is being driven
around an extremely short curve
While a warning of the driver
monitor is being displayed, the
vehicle acceleration will be
restrained.
When the warning of the driver
monitor disappears, the restrained
acceleration control will end.
If your vehicle is being driven at
approximately 50 mph (80 km/h)
or more and a lane change to
the passing lane is performed,
when the turn signal lever is
operated and the lane is
changed, the vehicle will accel- erate up to the set speed to
assist in overtaking.
The system’s recognition of
which lane is the passing lane
may be based solely on the
location of the steering wheel in
the vehicle (left-hand drive/right-
hand drive). If the vehicle is
driven in a location where the
passing lane is on the opposite
side of that where the vehicle
was originally sold, the vehicle
may accelerate when the turn
signal lever is operated away
from the passing lane. (e.g. The
vehicle was manufactured for a
right-hand traffic location, but is
being driven in a left-hand traffic
location. The vehicle may accel-
erate when the turn signal lever
is operated to the right.)
If your vehicle is being driven at
approximately 50 mph (80 km/h)
or more and the lane is changed
to that with a vehicle traveling
slower than your vehicle, when
the turn signal lever is operated
the vehicle will
gradually decel-
erate to assist in changing
lanes.
The settings of Dynamic radar
cruise control can be changed
through customize settings.
( P.628)
Driver Monitor support
function (if equipped)
Support for lane changeChanging Dynamic radar
cruise control settings

3405-5. Using the driving support systems
The operating state of Dynamic radar cruise control is indicated.
Display and system operation state
IndicatorMulti-information displaySituation
White
Vehicle-to-vehicle
distance setting:
GrayDynamic
radar cruise
control being
OFF
Green
Vehicle-to-vehicle
distance setting:
Blue
Set vehicle speed:
Green
Constant
speed cruis-
ing
Green
Vehicle-to-vehicle
distance setting:
Blue
Set vehicle speed:
Green
Preceding vehicle:
White
Follow-up
cruising
Green
Vehicle-to-vehicle
distance setting: Yel-
low flashing
Set vehicle speed:
Green
Preceding vehicle:
Yellow flashing
Approach
warning

3415-5. Using the driving support systems
5
Driving
Green
Vehicle-to-vehicle
distance setting:
Gray
Set vehicle speed:
White
Preceding vehicle:
Gray
Accelerating
with the
accelerator
pedal
Green
Set vehicle speed:
Green in reverse
displaySet vehicle
speed being
exceeded
Green
Vehicle-to-vehicle
distance setting:
Gray
Set vehicle speed:
White
Preceding vehicle:
Gray
Vehicle in
controlled
stop
IndicatorMulti-information displaySituation

3425-5. Using the driving support systems
■Meter displaySet vehicle speed
Cruise control indicator
■SwitchesDriving assist mode select
switch
Driving assist switch
“+” switch / “RES” switch
“-” switch
Cancel switch
Cruise control
The vehicle can be driven at
a set speed even if the
accelerator pedal is not
depressed.
Use the cruise control only
on highways and express-
ways.
WARNING
■For safe use
●Driving safely is solely the
responsibility of the driver.
Therefore, do not overly rely on
this system. The driver is solely
responsible for paying attention
to the vehicle’s surroundings
and driving safely.
●Set the speed appropriately
according to the speed limit,
traffic flow, road conditions,
weather conditions, etc. The
driver is responsible for confirm-
ing the set speed.
■Situations in which cruise
control should not be used
Do not use the cruise control in
the following situations. As the
system will not be able to provide
appropriate control, using it may
lead to an accident resulting in
death or serious injury.
●On roads with sharp bends
●On winding roads
●On slippery roads, such as
those covered with rain, ice or
snow
●On steep downhills, or where
there are sudden changes
between sharp up and down
gradients
Vehicle speed may exceed the
set speed when driving down a
steep hill.
●When it is necessary to disable
the system: P.284
System Components
A
B
A
B
C
D
E

3435-5. Using the driving support systems
5
Driving
■Setting the vehicle speed
1 Press the driving assist mode
select switch to select cruise
control.
The cruise control indicator will illu-
minate.
2Using the accelerator pedal,
accelerate to the desired
vehicle speed (approxi-
mately 20 mph [30 km/h] or
more), and press the driving
assist switch to set the set
vehicle speed.
The vehicle speed at the moment
the switch is released will be the set
vehicle speed.
■Adjusting the set speed
 Adjusting the set vehicle
speed using the switches
To change the set vehicle speed,
press the “+” or “-” switch until the desired speed is displayed.
1
Increase set vehicle speed
2 Decrease set vehicle speed
The set vehicle speed will increase
or decrease as follows:
Fine adjustment: By 1 mph (1.6
km/h) or 1 km/h (0.6 mph) each
time the switch is pressed
Large adjustment: Increases con-
tinuously while the switch is
pressed and held
Increasing the set vehicle
speed using the accelerator
pedal
1 Depress the accelerator
pedal to accelerate the vehi-
cle to the desired vehicle
speed.
2 Press the “+” switch.
■Canceling/resuming control
1 Press the cancel switch or
driving assist switch to cancel
control.
Control will also be canceled if the
Using the cruise control

3445-5. Using the driving support systems
brake pedal is depressed.
2Press the “RES” switch to
resume control.
■Automatic cancellation of the
cruise control
In the following situations, the cruise control will be canceled automati-
cally:
●When the vehicle speed drops
approximately 10 mph (16 km/h)
or more below the set vehicle
speed
●When the vehicle speed drops
below approximately 20 mph (30
km/h)
●When the brake control or output
restriction control of a driving sup-
port system operates (For exam-
ple: PCS, drive-start control)
●When the parking brake has been
operated
●Situations in which some or all of
the functions of the system cannot
operate:
P.291
The operating state of cruise control is indicated.
Display and system operation state
IndicatorMulti-information displaySituation
White
Blank
Cruise con-
trol being
OFF
Green
Set vehicle speed:
GreenConstant
speed cruis-
ing
Green
Set vehicle speed:
Green in reverse
displaySet vehicle
speed being
exceeded