stop start TOYOTA PRIUS PRIME 2023 Workshop 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.

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

3485-5. Using the driving support systems
*: If equipped
■Precautions for use
 P.289
 Sensors which detect the sur-
rounding conditions ( P.286)
 Sensors which detect the
driver condition ( P.286)
■Situations in which some or all
of the functions of the system
cannot operate
 P.291
■Changes in brake operation
sound and pedal response
 P.291
■Situations in which the driver
monitor may not operate prop-
erly
 P.291
P.345
 P.333
The Traffic Jam Assist function,
through confirmation of the con-
ditions by the driver, provides
lane keeping, accelerat-
ing/decelerating and stopping
support on some highways and
expressways.
This function is operable when
all of the operation conditions
are met. When this function is
operating, it is possible to take
your hands off of the steering
wheel.
Before using the Traffic Jam Assist
function, familiari ze yourself with
the content of the dynamic radar
cruise control and the LTA (Lane
Tracing Assist).
Make sure that the driver steers the
vehicle when entering a service
area/parking area or toll gate, or
when changing lanes.
■Driver monitor camera
recording
When the operation of Traffic
Traffic Jam Assist*
Traffic Jam Assist is a sys-
tem which, through confir-
mation of the conditions by
the driver, provides lane
keeping, accelerating/decel-
erating, stopping, and start-
ing off support on some
highways and express-
ways. Also, in an emer-
gency, the system can
decelerate and stop, to help
avoid a collision or help
reduce the impact of a colli-
sion.
Sensors that support the
Traffic Jam Assist
Emergency Driving Stop
System
Extended resume time of
dynamic radar cruise con-
trol
Traffic Jam Assist Func-
tion

3515-5. Using the driving support systems
5
Driving
■Operating conditions of the
function
This function is operable when all of
the following conditions are met:
●The system detects lane lines and
the path of preceding or surround-
ing vehicles.
●The dynamic radar cruise control
and the lane tracing assist are
operating.
●The turn signal lever is not being
operated.
●The vehicle is not being driven
around a sharp curve.
●The vehicle is being driven in the
center of a lane.
●The driver monitor camera is
detecting that the driver is facing
front of the vehicle.
●The vehicle is driving in traffic jam
on a highway or expressway at
approximately 25 mph (40 km/h)
or less. (In some situations, such
as when a traffic jam starts, this
function may be operational at
approximately 20 mph (30 km/h)
or less.)
●It is necessary to enter a con-
nected services contract, provided
by Toyota, to use these functions.
For details, contact your Toyota
dealer.
●The driver’s door is closed.
●The driver’s seat belt is fastened.
●Customized setting of the Traffic
Jam Assist is not set to off.
●Functions and components com-
posing the system are in proper
condition.
●Customized setting of the PCS (Pre-Collision System) is not set
to off.
●Customized setting of the dynamic
radar cruise control (re-start time
extension) is not set to off.
■Temporary cancelation of the
function
●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 func-
tion will automatically be restored.
●If the operating conditions of a
function are no longer met while
the function is operating, a buzzer
may sound with a display to indi-
cate that the function has been
temporarily canceled. If no driver’s
responses to the
indication are
detected, the driver emergency
stop assist function may operate.
For types of display and action to
be taken, see the page mentioned
below. ( P.352)
■Driving operations during con-
trolled driving:
●Accelerator pedal
As with normal driving, acceleration
can be performed by depressing the
accelerator pedal. When the accel-
erator pedal is depressed at approx-
imately 10 km/h (6 mph) or more,
this function will be canceled.
●Brake pedal
As with normal driving, deceleration
can be performed by depressing the
brake pedal. However, controlled
driving will be cancelled.
●Steering wheel
As with normal driving, the steering
wheel can be operated. If the steer-
ing wheel is operated more than a
certain amount, controlled driving
will be cancelled.
WARNING
■Front camera installation area
on the windshield
 P.288

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

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

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

3715-5. Using the driving support systems
5
Driving
Object
Calculated vehicle route
When the vehicle is moving, the side sensors or side cameras can
detect objects. While the vehicle is moving, if a detected object can
no longer be detected by the side sensors or side cameras, the loca-
tion of the object relative to the vehicle is estimated. If the object is
determined to be in the estimated path of the vehicle, the object
warning function will operate.
Object detected by side sensors or side cameras
1 The vehicle is stopped and objects along the sides of the vehicle
are not detected.
2 Objects are detected as the vehicle is moving.
3 Even though the objects are outsi de of the detection area of the
side sensors or side cameras, a warning is displayed and a
buzzer sounds.
■The intuitive parking assist
object warning function is oper-
ational when
●The vehicle moves about 23.0 ft.
(7 m) after the hybrid system is
started.
●The R shift position is selected.
●After the shift position has been
changed from R to D, the vehicle has moved approximately 23.0 ft.
(7 m) or less
● switch has been pressed and
the Multimedia Display is dis-
played.
●The front or rear sensor detects a
stationary object.
A
B
A

3875-5. Using the driving support systems
5
Driving
tion control begins operating
(System determines that pos-
sibility of collision with
detected object is high)
Brake control begins operat-
ing (System determines that
possibility of collision with
detected object is extremely
high)
■If the Parking Support Brake
has operated
If the vehicle is stopped due to oper-
ation of the Parking Support Brake,
the Parking Support Brake will be
disabled and the driving assist infor-
mation indicator will illuminate. In
addition, even when the PKSB
(Parking Support Brake) operates,
the brake control is canceled after
approximately 2 seco nds to start off.
Furthermore, the brake control also
can be canceled by depressing the
brake pedal. Depressing the accel-
erator pedal again after that allows
the vehicle to start off.
■Re-enabling the Parking Sup-
port Brake
To re-enable the Parking Support
Brake when it is disabled due to
operation of the PKSB (Parking
Support Brake), either enable the
system again, or turn the power
switch off and then back to ON.
Additionally, if any of the following
conditions are met, the system will
be re-enabled automatically and the
driving assist info rmation indicator
will turn off ( P.152):
●The P shift position is selected
●Drive with no operation targets in
the traveling direction of the vehi-
cle
●Change the traveling direction of
the vehicle
■Buzzer
Regardless of whether the intuitive
parking assist is enabled or not
(  P.364), if the PKSB (Parking
Support Brake) system is enabled
(  P.384), the buzzer will sound to
notify the driver of the approximate
distance to the object when the
brake control and the hybrid system
output restriction control are oper-
ated.
E

3905-5. Using the driving support systems
■The Parking Support Brake
function (static objects to the
front and rear) will operate
when
The function will operate when the
driving assist information indicator is
not illuminated ( P.150, 152) and
all of the followin g conditions are
met:
●Hybrid system output restriction
control
• The Parking Support Brake is enabled.
• The vehicle speed is approxi-
mately 9 mph (15 km/h) or less.
• There is a static object in the trav-
eling direction of the vehicle and
approximately 6 to 13 ft. (2 to 4 m)
away.
• The Parking Support Brake deter-
mines that a stronger-than-nor-
mal brake operation is necessary
to avoid a collision.
●Brake control
• Hybrid system output restriction
control is operating
• The Parking Support Brake deter- mines that an immediate brake
operation is necessary to avoid a
collision.
■The Parking Support Brake
function (static objects around
the vehicle)
* will operate when*: Vehicles with Advanced Park
This function is operable when any
of the following conditions are met in
addition to the operating conditions
for stationary objects in around the
vehicle.
●After the hybrid system has been
started, the vehicle has moved
approximately 23.0 ft. (7 m) or
less
●The R shift position is selected
●After the shift position has been
changed from R to D, the vehicle
has moved approximately 23.0 ft.
(7 m) or less
■The Parking Support Brake
function (static objects to the
front and rear/static objects
around the vehicle
*) will stop
operating when
*: Vehicles with Advanced Park
The function will st op operating if
any of the following conditions are
met:
●Hybrid system output restriction
control
• The Parking Support Brake is dis- abled.
• The system determines that the collision has become avoidable
with normal brake operation.
• The static object is no longer
approximately 6 to 13 ft. (2 to 4 m)
away from the vehicle or in the
traveling direction of the vehicle.
●Brake control
• The Parking Support Brake is dis- abled.
• Approximately 2 seconds have
elapsed since the vehicle was
stopped by brake control.
• The brake pedal is depressed
after the vehicle is stopped by
brake control.
• The static object is no longer
approximately 6 to 13 ft. (2 to 4 m)
WARNING
■To ensure the system can
operate properly
 P.364
■If the PKSB (Parking Support
Brake) operates unnecessar-
ily, such as at a railroad
crossing
 P.387
■Notes when washing the vehi-
cle
 P.365