Toyota Prius Plug-in Hybrid (2023 year). Manual in english - page 28

468

5-5. Using the driving support systems

When the hybrid system output restriction control or brake control
operates, the buzzer sounds and a message is displayed on the multi-
information display to alert the driver.

Depending on the situation, output restriction control operates to either
limit acceleration or restrict output as much as possible.

Display and buzzer for hybrid system output restriction control
and brake control

Control

Situation

Multi-information 

display

PKSB OFF 

Indicator

Buzzer

Hybrid sys-
tem output
restriction
control is
operating
(accelera-
tion limita-
tion control)

Accelera-
tion at a cer-
tain speed
or higher is
not possible.

Not 

illuminated

Short 

beep

Hybrid sys-
tem output
restriction
control is
operating
(control to
restrict out-
put as much
as possible)

A stronger-
than-normal
brake opera-
tion is nec-
essary

Not 

illuminated

Brake con-
trol is oper-
ating

Emergency
braking is
necessary

The vehicle
is stopped
by system
operation

The vehicle
is stopped
after brake
control oper-
ation

Illuminated

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5-5. Using the driving support systems

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■

Sensor detection range

The detection range of the Parking Support Brake function differs from the
detection range of the Toyota parking assist-sensor. (



P. 455)

Therefore, even if the Toyota parking assist-sensor detects an obstacle and
provides a warning, the Parking Support Brake function may not start operat-
ing.

■

System operation

When the vehicle is stopped by system operation, the Parking Support Brake
function stops and the PKSB OFF indicator illuminates.

■

System recovery

When the Parking Support Brake function is stopped by system operation
and you would like to resume operation, either turn the Parking Support
Brake function on again (



P. 464), or turn the power switch off and then back

on. Furthermore, when the vehicle moves with an obstacle no longer in the
traveling direction of the vehicle, or when the traveling direction of the vehicle
changes (such as when switching from moving forward to backing up, and
vice versa), system operation automatically resumes.

■

Obstacles not detected by the sensors

The following obstacles may not be detected by the sensors.

●

Objects such as people, cloth and snow, that are difficult for sonic waves to
reflect off of. (In particular, people may also not be detected depending on
the type of clothing they are wearing.)

●

Objects not perpendicular with the ground, objects not at a right angle to the
traveling direction of the vehicle, uneven objects or waving objects

●

Low objects

●

Thin objects such as wires, fences, ropes and signposts

●

Objects that are extremely close to the bumper

■

Situations in which the system may not operate properly



P. 457

■

Situations in which the system may operate even if there is no possibil-
ity of a collision



P. 459

■

In the unlikely event that the Parking Support Brake function mistakenly
operates at a crossing or elsewhere

Even in the unlikely event that the Parking Support Brake function mistakenly
operates at a crossing or elsewhere, brake control is canceled after approxi-
mately 2 seconds, allowing you to proceed forward and leave the area. Fur-
thermore, brake control is also canceled when the brake pedal is depressed.
Depressing the accelerator pedal again allows you to proceed forward and
leave the area.

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5-5. Using the driving support systems

■

When removing and installing the 12-volt battery

The system needs to be initialized.
The system can be initialized by driving the vehicle straight ahead for 5 sec-
onds or more at a speed of approximately 35 km/h (22 mph) or higher.

■

When “PKSB Unavailable” is displayed on the multi-information display
and the PKSB OFF indicator flashes

●

Ice, snow, dirt, etc., may have adhered to the sensor. If this occurs, remove
the ice, snow, dirt, etc., from the sensor to return the system to normal.
Also, a warning message may be displayed at low temperatures due to ice
forming on the sensor, and the sensor may not detect obstacles. Once the
ice melts, the system will return to normal.

●

If this message is shown even after removing dirt from the sensor, or shown
when the sensor was not dirty to begin with, have the vehicle inspected at
any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer.

■

When “PKSB Malfunction Visit Your Dealer” is displayed on the multi-
information display, the PKSB OFF indicator flashes and the buzzer
sounds

The system may not be operating properly. Have the vehicle inspected at any
authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer.

WARNING

■

Cautions regarding the use of the system

Do not rely solely upon the system. Relying solely upon the system may
lead to an unexpected accident.

●

Driving safely is the sole responsibility of the driver. Pay careful attention
to the surrounding conditions in order to ensure safe driving. The Parking
Support Brake function can provide support to lessen the severity of colli-
sions. However, it may not operate depending on the situation.

●

The Parking Support Brake function is not a system designed to com-
pletely stop the vehicle. Furthermore, even if the Parking Support Brake
function is able to stop the vehicle, brake control is canceled after approxi-
mately 2 seconds, so depress the brake pedal immediately.

●

It is extremely dangerous to check the system operations by intentionally
driving the vehicle into the direction of a wall, etc. Never attempt such
actions.

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5-5. Using the driving support systems

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WARNING

■

When to disable the Parking Support Brake

In the following situations, disable the Parking Support Brake as the system
may operate even though there is no possibility of a collision.

●

When inspecting the vehicle using a chassis roller, chassis dynamo or free
roller

●

When loading the vehicle onto a boat, truck or other transport vessel

●

If the suspension has been modified or tires of a size other than specified
are installed

●

If the front of the vehicle is raised or lowered due to the carried load

●

When equipment that may obstruct a sensor is installed, such as a towing
eyelet, bumper protector (an additional trim strip, etc.), bicycle carrier, or
snow plow

●

When using automatic car washing devices

●

If the vehicle cannot be driven in a stable manner, such as when the vehi-
cle has been in an accident or is malfunctioning

●

When the vehicle is driven in a sporty manner or off-road

●

When the tires are not properly inflated

●

When the tires are very worn

●

When tire chains, compact spare tire or an emergency tire puncture repair
kit are used

■

To ensure the system can operate properly



P. 460

■

Handling the suspension

Do not modify the suspension, as changes to the height or incline of the
vehicle may prevent the sensors from correctly detecting obstacles, may
cause the system not operate, or may cause the system to operate unnec-
essarily.

■

If the Parking Support Brake function (static objects) operates unnec-
essarily, such as at a railroad crossing



P. 469

■

Notes when washing the vehicle



P. 461

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5-5. Using the driving support systems

NOTICE

■

Preventing sensor malfunctions

●

If the area around a sensor is subjected to an impact, equipment may not
operate properly due to a sensor malfunction. Have the vehicle inspected
at any authorized Toyota retailer or Toyota authorized repairer, or any reli-
able repairer.

●

When using a high-pressure washer to wash the vehicle, do not spray
water directly on the sensors. The sensors may not function properly if
subjected to an impact from strong water pressure.

●

When using steam to wash the vehicle, do not direct steam too close to
the sensors. The sensors may not function properly if subjected to steam.

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5-5. Using the driving support systems

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S-IPA (Simple Intelligent Parking Assist 

System)



■

Function summary

The Simple Intelligent Parking Assist System automatically oper-
ates the steering wheel to provide support when backing into an
area near a target parking spot, and when departing from a parallel
parking spot. (Changing the shift position and speed adjustment
when moving forward or backing up are not performed automati-
cally.)

●

The Simple Intelligent Parking Assist System does not park the
vehicle automatically. It is a system that provides support when
pulling out of a perpendicular or parallel parking spot.

●

The Simple Intelligent Parking Assist System provides steering
wheel operation assistance to guide the vehicle toward the
selected intended parking spot. The selected intended parking
spot may not always be reachable, depending on road and vehi-
cle conditions at the time of parking, and the distance to the
intended parking spot.

■

Linking with the Parking Support Brake function

While the Simple Intelligent Parking Assist System is operating, if
the system detects an obstacle that could result in a collision, the
emergency brakes operate, regardless of whether the Parking Sup-
port Brake function is on or off. (



P. 475)



: If equipped

Simple Intelligent Parking Assist System

WARNING

●

When backing up or proceeding forward, be sure to directly confirm the
safety of the area to the front or rear, and the area around the vehicle, and
slowly back up or proceed forward while adjusting the vehicle speed by
depressing the brake pedal.

●

If it seems the vehicle may make contact with a pedestrian, another vehi-
cle or any other obstacles, stop the vehicle by depressing the brake pedal,
and then press the S-IPA switch (



P. 476) to turn the system off.

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5-5. Using the driving support systems

Chart of Simple Intelligent Parking Assist System assist modes
and functions

Assist mode

Type of 
parking

Function summary

See page

Parallel parking 

assist mode

Parallel park-

ing

Guidance is provided to
detect the intended
parking spot and reach a
position to begin back-
ing up from. Assistance
is provided from when
the vehicle begins back-
ing up until it reaches
the intended parking
spot.

P. 479

Exit parallel parking 

assist mode

Exit parallel 

parking

Assistance starts after
the vehicle has been
parallel parked. Assis-
tance is provided to
guide the vehicle from
the parking space to a
position from which it
can take off.

P. 486

Back-in parking 

assist mode

(with forward guid-

ance function)

Back-in park-

ing

Assistance starts after
stopping the vehicle in
front of the intended
parking spot, and is pro-
vided for backing into a
parking space, including
guidance to reach a
position to begin back-
ing up from.

P. 491

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5-5. Using the driving support systems

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■

Parking Support Brake function while the Simple Intelligent Parking
Assist System is operating

While the Simple Intelligent Parking Assist System is operating, if the system
detects an obstacle that could result in a collision, hybrid system output
restriction control and brake control of the Parking Support Brake function are
operated, regardless of whether the Parking Support Brake function is on or
off. (



P. 464)

●

After the Parking Support Brake function operates, operation of the Simple
Intelligent Parking Assist System is temporarily stopped, and operation of
the Parking Support Brake function is indicated on the multi-information dis-
play. (



P. 468)

●

When operation of the Simple Intelligent Parking Assist System is stopped 3
times by operation of the Parking Support Brake function, the Simple Intelli-
gent Parking Assist System is canceled.

●

Once the Simple Intelligent Parking Assist System becomes available after
the Parking Support Brake function is operated, a message prompting you
to shift is displayed on the multi-information display. Operation of the Simple
Intelligent Parking Assist System can be resumed by shifting according to
the prompt on the multi-information display and pressing the S-IPA switch
(



P. 476) again.

■

Shifting while the Simple Intelligent Parking Assist System is operating

If the system determines that the driver intends to move forward or in reverse,
assistance continues even if the driver shifted before being prompted to do so
by the system. However, because driver operation differs from the guidance
provided by the system, the number of turning maneuvers may increase.

■

Customization

Settings (e.g. obstacle detection range) can be changed. (Customizable fea-
tures: 



P. 726)

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5-5. Using the driving support systems

■

Switching using the S-IPA switch

Press the switch

This allows you to switch func-
tions and cancel or restart assist
modes.

While the power switch is on, the vehicle speed is approximately
30 km/h (19 mph) or less, each time the S-IPA switch is pressed the
function switches as follows.

The selected function is indicated on the operation display area of the
multi-information display. (



P. 477)

*

: The back-in parking assist mode can be switched to when its operating

conditions are met (



P. 496). When the operating conditions are not met,

it switches to off.

Switching assist mode

IO55PH104



When the S-IPA switch is
pressed with the shift position
not in P



When the S-IPA switch is
pressed with the shift position
in P

Back-in parking assist mode

*

Parallel parking assist mode

Off

Exit parallel parking 
assist mode 

Off

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5-5. Using the driving support systems

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The guidance screen is displayed on the multi-information display.

Assistance level indicator

Displays a gauge indicating the
level until the vehicle’s stopping
position/the position at which assist
control ends.

Stop display

When illuminated, depress the
brake pedal and stop the vehicle at
once.

Operation display area

Displays the operating condition of the Simple Intelligent Parking Assist
System.

Advice display

Follow the instructions on the display and perform any indicated opera-
tions. As an example, the illustration shows the display indicating it is nec-
essary to depress the brake pedal in order to control the vehicle speed and
to confirm the safety of your surroundings.

S-IPA switch icon

Displayed when the assist mode can be changed and the system can be
turned off or on using the S-IPA switch.

Steering wheel auto operation display

Displays when the steering wheel auto operation is being performed.

Toyota parking assist-sensor display/door position (open/close) dis-
play



P. 451

■

S-IPA indicator inside the meter (



P. 208)

This indicator illuminates when the steering wheel auto operation is being
performed by the Simple Intelligent Parking Assist System. After control
ends, the indicator blinks for a short period of time and then turns off.

■

Toyota parking assist-sensor pop-up display

While the Simple Intelligent Parking Assist System is operating, if the Toyota
parking assist-sensor function detects an obstacle, the Toyota parking assist-
sensor display automatically pops up on the guidance screen (



P. 451),

regardless of whether the Toyota parking assist-sensor function is on or off.
(



P. 450)

Guidance screen

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2

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4

5

6

7

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5-5. Using the driving support systems

Assist mode will be canceled or stopped in the following cases.

■

Assist control is canceled when

●

The system temperature preservation function operates

●

There is a system malfunction

●

System determined that the parking environment is not suitable
for assist to continue

When assist control is canceled, firmly grasp the steering wheel,
depress the brake pedal and stop the vehicle.
Start again from the beginning, as the system will already be can-
celed. When continuing to park manually, operate the steering
wheel as you normally would.

■

Assist control is stopped when

●

The steering wheel is operated

●

The vehicle speed exceeds 7 km/h (4 mph) during assist control

●

The Parking Support Brake function operates

When assist control is stopped, it can be resumed by following the
guidance shown on the screen.

■

If the vehicle speed is about to exceed the speed limit during assist con-
trol

Canceling or stopping assist mode

A buzzer sounds and the message indi-
cating there is possibility that the vehicle
speed may exceed the speed limit.
When the message is displayed, immedi-
ately depress the brake pedal to deceler-
ate. If the vehicle continues to accelerate,
assist control will be canceled when the
vehicle speed exceeds a certain speed.
(



P. 501)

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5-5. Using the driving support systems

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Function summary

If a parking space can be detected, you will be guided forward until
you reach the assist control starting position, and then the parallel
parking assist mode can be used. Furthermore, depending on the
parking space and other conditions, multi-turn maneuvering assist
control is also provided if necessary.

Continue moving forward
with the vehicle parallel to
the curb or road, and stop so
that the center of the target
parking spot appears nearly
perpendicular to the vehicle.
Then press the S-IPA switch
1 time to select the parallel
parking assist mode.
Travel straight ahead paral-
lel with the road or curb so
that the parking space is
detected.
A sound is issued and a display is shown to notify you when the
vehicle reaches a position where assist control can be used to
begin backing up from, and then when the shift position is
changed according to guidance provided by the system, steering
wheel auto operation begins.

If the detected parking space or road width (distance to the side of the
road across from the parking space) is narrow, or if there are obstacles
in front of the vehicle, guidance will not be issued.

Parking is complete

This completes the assist mode. Depending on the condition of the
parking space, guidance to starting points for moving forward and back-
ing up, as well as the steering wheel auto operation, are repeated any
time multi-turn maneuvering is necessary following step   from the
time the vehicle begins backing up until parking completes.

How to parallel park (parallel parking assist mode)

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5-5. Using the driving support systems

■

Parking

Stop so that the center of the target parking spot appears nearly
perpendicular to vehicle. Then press the S-IPA switch 1 time and
check that the display on the multi-information display switches
to “Parallel Parking”.

●

The mode switches each time the S-IPA switch is pressed. 
(



P. 476)

●

When the vehicle speed is approximately 30 km/h (19 mph) or
higher, pressing the S-IPA switch will not cause the screen to
switch to the “Parallel Parking” display.

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5-5. Using the driving support systems

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Travel straight ahead paral-
lel with the road (or curb),
and maintain a gap of
approximately 1 m (3.3 ft.)
from any parked vehicles.

●

Proceed slowly.

●

The system will begin
searching for a parking
space.

●

While searching for a
space, the turn signal lever
(



P. 335) can be operated

to select a parking space
on the left or right.

●

When stopping the func-
tion, press the S-IPA
switch once to turn the
function off.

●

When a parking space is
detected, the screen will
change.

2

1 m 
(3.3 ft.)

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5-5. Using the driving support systems

When a beep sounds once
and the stop display (



P. 477)

is shown on the display, stop
the vehicle.

When the shift position is changed to R, a high-pitched beep is
emitted and assist control will start.

●

When the steering wheel auto operation starts, the steering
wheel auto operation display (



P. 477) and assistance level

indicator (



P. 477) will be shown in the display area.

●

To stop assist control, press the S-IPA switch.

Assume an ordinary posture for backing up, rest your hands
lightly on the steering wheel without applying any force, directly
confirm the safety of the area to the rear and around the vehicle,
confirm that there are no obstacles in the parking space, and
slowly back up while adjusting your speed by depressing the
brake pedal.

●

When backing up too quickly, a sharp beeping sound is emit-
ted and assist control is stopped. (



P. 501)

●

When the vehicle cannot be cleanly entered within the target
parking spot on the first try and multi-turn maneuvering is nec-
essary, proceed to step 

.

When multi-turn maneuvering is not necessary, proceed to
step .

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When a beep sounds once
and the stop display (



P. 477)

is shown on the display, stop
the vehicle.

Change the shift position to D.
Assume an ordinary driving posture, rest your hands lightly on
the steering wheel without applying any force, directly confirm
the safety of the area to the front and around the vehicle and
slowly proceed forward while adjusting your speed by depressing
the brake pedal.
When a beep sounds once and the stop display (



P. 477) is

shown on the display, stop the vehicle.
Change the shift position to R.
Assume an ordinary posture for backing up, rest your hands
lightly on the steering wheel without applying any force, directly
confirm the safety of the area to the rear and around the vehicle
and slowly back up while adjusting your speed by depressing the
brake pedal.

Depending on the condition of the parking space, steps   to   may
need to be repeated.

When the vehicle is almost entirely within the target parking spot,
a high-pitched beep is emitted and the stop display is shown on
the display, stop the vehicle.
This completes the parallel parking assist mode.

●

After stopping, feel free to maneuver the vehicle to reach the
desired parking spot.

●

Be sure to back up while checking the area to the front and
rear of the vehicle directly and by using the mirrors.

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