TOYOTA PRIUS PRIME 2023 Owners Manual

4215-5. Using the driving support systems
5
Driving
adjusted.
■“Park position adjustment
(forward)”
The position at which perpendic-
ular parking (forward) is com-
pleted can be adjusted. (Except
when using the memory func-
tion.)
■“Park position adjustment
(reverse)”
The position at which perpendic-
ular parking (reverse) is com-
pleted can be adjusted. (Except
when using the memory func-
tion.)
■“Rear accessory setting”
If an accessory, such as a trailer
hitch, has been installed to the
rear of the vehicle, the length of
the rear of the vehicle can be
adjusted to help avoid colliding
with objects to the rear of the
vehicle.
■“Clear registered parking
space”
The parking spaces registered
to the memory function can be
deleted. Parking space informa-
tion cannot be deleted when
assistance is being performed
or when registering parking
space information to the mem-
ory function. The operating state, assistance
operation, etc. of the Advanced
Park is displayed on the Multi-
media Display. If a message is
displayed, respond according to
the content displayed.
■If “No available parking space”
is displayed
Move the vehicle to a location where
a parking space or parking lines can
be detected.
■If “Unavailable in current condi-
tion” is displayed
Move the vehicle to another location
and use the system.
■If “Not enough space to exit” is
displayed
The parallel parking exit function
cannot be used due to a situation
such as the distance between your
vehicle and vehicles parked in front
of and behind your vehicle being
short, the existence of an object in
the exit direction, etc.
Check the conditions of the area
NOTICE
●Take care when using the park
position adjustment (forward) or
park position adjustment
(reverse) for adjusting because
the vehicle may collide with
parking blocks, curb stones, or
other low objects.
●If it is likely that your vehicle will
collide with a nearby vehi-
cle/object, parking block, curb
stone, etc., depress the brake
pedal to stop the vehicle and
press the Advanced Park main
switch to disable the system.
Advanced Park displayed
messages

4225-5. Using the driving support systems
around your vehicle and exit from
the parking space manually.
■If “Cannot control speed” is
displayed
The system judged that it cannot
adjust the speed of the vehicle when
using the system in an area with a
slope or step and assistance was
canceled.
Use the system in a level location.
■If “Obstacle detected” is dis-
played
As a moving object or stationary
object that may collide with your
vehicle has been detected, the
hybrid system output control/braking
control operates to suspend
Advanced Park assistance.
Check the condition of the surround-
ing area. To resume assistance,
select the “Start” button on the Multi-
media Display.
■If “No available parking space
to register” is displayed
This message is displayed when
is selected at a parking space that
cannot be detected.
Operate the system at a parking
space where differences in the road
surface can be recognized.
(  P.414)
Operate the driving mode select
switch forward or backward to
select the desired driving mode.
Indicator
Driving mode select switch
1 Normal mode
Provides an optimal balance of fuel
economy, quietness, and dynamic
performance. Suitable for normal
driving.
2Eco drive mode
Helps the driver accelerate in an
eco-friendly manner and improve
fuel economy through moderate
throttle characteristics and by con-
trolling the operation of the air con-
ditioning system (heating/cooling).
Driving mode select
switch
The driving modes can be
selected to suit the driving
and usage conditions.
Selecting a driving mode
A
B

4235-5. Using the driving support systems
5
Driving
When Eco drive mode is selected,
Eco drive mode indicator comes
on.
3Sport mode
Controls the hybrid system to pro-
vide quick, powerful acceleration.
This mode also expands the possi-
ble rate of deceleration by operat-
ing the accelerator pedal and
enables acceleration/deceleration
control based on the driver’s inten-
tions. This changes the steering
feel, making it suitable for when
agile driving response is desired,
such as when driving on roads with
many curves.
When Sport mode is selected,
Sport mode indicator comes on.
4Custom mode
Allows you to drive with the power
train, steering wheel and air condi-
tioning system func tions set to your
preferred settings.
Custom mode settings can only be
changed on the drive mode cus-
tomization display of Multimedia
Display. ( P.632)
When the Custom mode is
selected, Custom mode indicator
comes on.
■Operation of the air condition-
ing system in Eco drive mode
When Eco drive mode is selected,
the air conditioning system will auto-
matically be changed to eco air con-
ditioning mode.
Eco air conditioning mode controls
the heating/cooling operations and
fan speed of the air conditioning
system to enhance fuel efficiency.
To improve air conditioning perfor-
mance, perform the following opera-
tions:
●Adjust the fan speed ( P.435)
●Deactivate Eco drive mode
●Turn off eco air conditioning mode
( P.440)
■Automatic deactivation of a
driving mode
●Sport mode and Custom mode
are automatically deactivated and
the driving mode returns to normal
mode when the power switch is
turned to OFF.
●Normal mode and Eco drive mode
are not deactivated until another
driving mode is selected. (Even if
the power switch is turned to OFF,
normal mode and Eco drive mode
will not be automatically deacti-
vated.)
■Customization
The custom mode can be changed.
(Customizable features: P.618)

4245-5. Using the driving support systems
■ECB (Electronically Con-
trolled Brake System)
The electronically controlled
system generates braking force
corresponding to the brake
operation
■ABS (Anti-lock Brake Sys-
tem)
Helps to prevent wheel lock
when the brakes are applied
suddenly, or if the brakes are
applied while driving on a slip-
pery road surface
■Brake assist
Generates an increased level of
braking force after the brake
pedal is depressed when the
system detects a panic stop sit-
uation
■VSC (Vehicle Stability Con-
trol)
Helps the driver to control skid-
ding when swerving suddenly or
turning on slippery road sur-
faces.
■Enhanced VSC (Enhanced
Vehicle Stability Control)
Provides cooperative control of
the ABS, TRAC, VSC and EPS.
Helps to maintain directional
stability when swerving on slip-
pery road surfaces by con-
trolling steering performance.
■TRAC (Traction Control)
Helps to maintain drive power
and prevent the drive wheels
from spinning when starting the
vehicle or accelerating on slip-
pery roads
■Active Cornering Assist
(ACA)
Helps to prevent the vehicle
from drifting to the outer side by
performing inner wheel brake
control when attempting to
accelerate while turning
■Hill-start assist control
Helps to reduce the backward
movement of the vehicle when
starting on an uphill
■EPS (Electric Power Steer-
ing)
Employs an electric motor to
reduce the amount of effort
needed to turn the steering
Driving assist systems
To keep driving safety and
performance, the following
systems operate automati-
cally in response to various
driving situations. Be
aware, however, that these
systems are supplementary
and should not be relied
upon too heavily when oper-
ating the vehicle.
Summary of the driving
assist systems

4255-5. Using the driving support systems
5
Driving
wheel.
■The Secondary Collision
Brake
When the SRS airbag sensor
detects a collision and the sys-
tem operates, the brakes and
brake lights are automatically
controlled to reduce the vehicle
speed and help reduce the pos-
sibility of further damage due to
a secondary collision.
■When the TRAC/VSC/ABS sys-
tems are operating
The slip indicator light will flash
while the TRAC/VSC/ABS systems
are operating.
■Disabling the TRAC system
If the vehicle gets stuck in mud, dirt
or snow, the TRAC system may
reduce power from the hybrid sys-
tem to the wheels.
Pressing to turn the system off
may make it easier for you to rock
the vehicle in order to free it.
To turn the TRAC system off,
quickly press and release . The “Traction Control Turned OFF”
will be shown on the multi-informa-
tion display.
Press again to turn the system
back on.
■Turning off both TRAC and VSC
systems
To turn the TRAC and VSC systems
off, press and hold for more than
3 seconds while the vehicle is
stopped.
The VSC OFF indicator light will
come on and the “Traction Control
Turned OFF” will be shown on the
multi-informat ion display.
*
Press again to turn the systems
back on.
*: PCS (Pre-Collision System) will
also be disabled (only pre-collision
warning is available). The PCS
warning light will come on and a
message will be disp layed on the
multi-information display.
(  P.298)
■When the message is dis-
played on the mu lti-information
display showing that TRAC has
been disabled even if has
not been pressed
TRAC is temporary deactivated. If
the information continues to show,
contact your Toyota dealer.
■Operating conditions of hill-
start assist control
When all of the following conditions
are met, the hill-start assist control
will operate:
●The shift position is in a position
other than P or N (when starting
off forward/backward on an
upward incline)
●The vehicle is stopped

4265-5. Using the driving support systems
●The accelerator pedal is not
depressed
●The parking brake is not engaged
●The power switch is in ON
■Automatic system cancelation
of hill-start assist control
The hill-start assist control will turn
off in any of the following situations:
●Shift the shift position to P or N.
●The accelerator pedal is
depressed
●The brake pedal is depressed and
the parking brake is engaged
●A maximum of 2 seconds have
elapsed after the brake pedal is
released
●The power switch is turned to OFF
■Sounds and vibrations caused
by the ABS, brake assist, VSC,
TRAC and hill-start assist con-
trol systems
●A sound may be heard from the
engine compartment when the
brake pedal is depressed repeat-
edly, when the hybrid system is
started or just after the vehicle
begins to move. This sound does
not indicate that a malfunction has
occurred in any of these systems.
●Any of the following conditions
may occur when the above sys-
tems are operating. None of these
indicates that a malfunction has
occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard also
after the vehicle comes to a stop.
■ECB operating sound
ECB operating sound may be heard
in the following cases, but it does
not indicate that a malfunction has
occurred.
●Operating sound heard from the
engine compartment when the
brake pedal is operated.
●Operating sound heard from the engine compartment when one or
two minutes passed after the stop
of the hybrid system.
■Active Cornering Assist opera-
tion sounds and vibrations
When the Active Cornering Assist is
operated, operation sounds and
vibrations may be generated from
the brake system, but this is not a
malfunction.
■Automatic reactivation of TRAC
and VSC systems
After turning the TRAC and VSC
systems off, the systems will be
automatically re-enabled in the fol-
lowing situations:
●When the power switch is turned
off
●If only the TRAC system is turned
off, the TRAC will turn on when
vehicle speed increases
If both the TRAC and VSC sys-
tems are turned off, automatic re-
enabling will not occur when vehi-
cle speed increases.
■Operating conditions of Active
Cornering Assist
The system operates when the fol-
lowing occurs.
●TRAC/VSC can operate
●The driver is attempting to accel-
erate while turning
●The system detects that the vehi-
cle is drifting to the outer side
●The brake pedal is released
■Reduced effectiveness of the
EPS system
The effectivenes s of the EPS sys-
tem is reduced to prevent the sys-
tem from overheating when there is
frequent steering input over an
extended period of time. The steer-
ing wheel may feel heavy as a
result. Should this occur, refrain
from excessive steering input or
stop the vehicle and turn the hybrid
system off. The EPS system should
return to normal within 10 minutes.

4275-5. Using the driving support systems
5
Driving
■Secondary Collision Brake
operating conditions
The system operates when the SRS
airbag sensor detects a collision
while the vehicle is in motion.
However, the system does not oper-
ate when the components are dam-
aged.
■Secondary Collision Brake
automatic cancellation
The system is automatically can-
celed in any of the following situa-
tions.
●The vehicle speed drops to
approximately 0 mph (0 km/h).
●A certain amount of time elapses
during operation
●The accelerator pedal is
depressed a large amount
WARNING
■The ABS does not operate
effectively when
●The limits of tire gripping perfor-
mance have been exceeded
(such as excessively worn tires
on a snow-covered road).
●The vehicle hydroplanes while
driving at high speed on wet or
slick roads.
■Stopping distance when the
ABS is operating may exceed
that of normal conditions
The ABS is not designed to
shorten the vehicle’s stopping dis-
tance. Always maintain a safe dis-
tance from the vehicle in front of
you, especially in the following sit-
uations:
●When driving on dirt, gravel or
snow-covered roads
●When driving with tire chains
●When driving over bumps in the
road
●When driving over roads with
potholes or uneven surfaces
■TRAC/VSC may not operate
effectively when
Directional control and power may
not be achievable while driving on
slippery road surfaces, even if the
TRAC/VSC system is operating.
Drive the vehicle carefully in con-
ditions where stability and power
may be lost.
■Active Cornering Assist does
not operate effectively when
●Do not overly rely on Active
Cornering Assist. Active Corner-
ing Assist may not operate
effectively when accelerating
down slopes or driving on slip-
pery road surfaces.
●When Active Cornering Assist
frequently operates, Active Cor-
nering Assist may temporarily
stop operating to ensure proper
operation of the brakes, TRAC
and VSC.
■Hill-start assist control does
not operate effectively when
●Do not overly rely on hill-start
assist control. Hill-start assist
control may not operate effec-
tively on steep inclines and
roads covered with ice.
●Unlike the parking brake, hill-
start assist control is not
intended to hold the vehicle sta-
tionary for an extended period
of time. Do not attempt to use
hill-start assist control to hold
the vehicle on an incline, as
doing so may lead to an acci-
dent.

4285-5. Using the driving support systems
WARNING
■When the TRAC/ABS/VSC is
activated
The slip indicator light flashes.
Always drive care fully. Reckless
driving may cause an accident.
Exercise particular care when the
indicator light flashes.
■When the TRAC/VSC systems
are turned off
Be especially careful and drive at
a speed appropriate to the road
conditions. As these are the sys-
tems to help ensure vehicle stabil-
ity and driving force, do not turn
the TRAC/VSC systems off
unless necessary.
■Replacing tires
Make sure that all tires are of the
specified size, brand, tread pat-
tern and total load capacity. In
addition, make sure that the tires
are inflated to the recommended
tire inflation pressure level.
The ABS, TRAC and VSC sys-
tems will not function correctly if
different tires are installed on the
vehicle.
Contact your Toyota dealer for
further information when replacing
tires or wheels.
■Handling of tires and the sus-
pension
Using tires with any kind of prob-
lem or modifying the suspension
will affect the driv ing assist sys-
tems, and may cause a system to
malfunction.
■Secondary Collision Brake
Do not rely solely upon the Sec-
ondary Collision Brake. This sys-
tem is designed to help reduce
the possibility of further damage
due to a secondary collision, how-
ever, that effect changes accord-
ing to various conditions. Overly
relying on the system may result
in death or serious injury.

4295-6. Driving tips
5
Driving
5-6.Driving tips
Use fluids that are appropriate
to the prevailing outside tem-
peratures.
• Engine oil
• Engine coolant
• Power control unit coolant
• Washer fluid
Have a service technician
inspect the condition of the
12-volt battery.
 Have the vehicle fitted with
four snow tires or purchase a
set of tire chains for the front
tires.
*
Ensure that all tires are the same
size and brand, and that chains
match the size of the tires.
*: Tire chains cannot be mounted
on vehicles with 195/50R19 tires.
Winter driving tips
Carry out the necessary
preparations and inspec-
tions before driving the
vehicle in winter. Always
drive the vehicle in a man-
ner appropriate to the pre-
vailing weather conditions.
Preparation for winter
WARNING
■Driving with snow tires
Observe the following precautions
to reduce the risk of accidents.
Failure to do so may result in a
loss of vehicle control and cause
death or serious injury.
●Use tires of the specified size.
●Maintain the recommended
level of air pressure.
●Do not drive in excess of 75
mph (120 km/h), regardless of
the type of snow tires being
used.
●Use snow tires on all, not just
some wheels.
■Driving with tire chains
(except 195/50R19 tires)
Observe the following precautions
to reduce the risk of accidents.
Failure to do so may result in the
vehicle being unable to be driven
safely, and may cause death or
serious injury.
●Do not drive in excess of the
speed limit specified for the tire
chains being used, or 30 mph
(50 km/h), whichever is lower.
●Avoid driving on bumpy road
surfaces or over potholes.
●Avoid sudden acceleration,
abrupt steering, sudden brak-
ing and shifting operations that
cause sudden engine braking.
●Slow down sufficiently before
entering a curve to ensure that
vehicle control is maintained.
●Do not use LTA (Lane Tracing
Assist) system.
●Do not use LDA (Lane Depar-
ture Alert) system.

4305-6. Driving tips
Perform the following according
to the driving conditions:
Do not try to forcibly open a
window or move a wiper that
is frozen. Pour warm water
over the frozen area to melt
the ice. Wipe away the water
immediately to prevent it from
freezing.
 To ensure proper operation of
the climate control system
fan, remove any snow that
has accumulated on the air
inlet vents in front of the wind-
shield.
 Check for and remove any
excess ice or snow that may
have accumulated on the
exterior lights, outside rear
view mirrors, windows, vehi-
cle’s roof, chassis, around the
tires or on the brakes.
 Remove any snow or mud
from the bottom of your shoes
before getting in the vehicle. Accelerate the vehicle slowly,
keep a safe distance between
you and the vehicle ahead, and
drive at a reduced speed suit-
able to road conditions.

Turn automatic mode of the
parking brake off.
Otherwise, the parking brake
may freeze and not be able to
be released automatically.
Also, avoid using the following as
the parking brake may operate
automatically, even if automatic
mode is off.
• Brake hold system
Park the vehicle and shift the
shift position to P without set-
ting the parking brake. The
parking brake may freeze up,
preventing it from being
released. If the vehicle is
parked without setting the
parking brake, make sure to
block the wheels. Failure to
do so may be dangerous
because it may cause the
vehicle to move unexpect-
edly, possibly leading to an
accident.
 When the parking brake is in
automatic mode, release the
parking brake after shifting
the shift position to P.
( P.264)
NOTICE
■Repairing or replacing snow
tires
Request repairs or replacement of
snow tires from your Toyota
dealer or legitimate tire retailers.
This is because the removal and
attachment of snow tires affects
the operation of the tire pressure
warning valves and transmitters.
Before driving the vehicle
When driving the vehicle
When parking the vehicle