Toyota Prius (2023 year). Manual in english - page 21

342

4-5. Using the driving support systems

■

Dynamic radar cruise control with full-speed range can be set when

●

The shift position is in D.

●

The desired set speed can be set when the vehicle speed is approximately
30 km/h (20 mph) or more.
(However, when the vehicle speed is set while driving at below approxi-
mately 30 km/h [20 mph], the set speed will be set to approximately 30 km/h
[20 mph].)

■

Accelerating after setting the vehicle speed

The vehicle can accelerate by operating the accelerator pedal. After acceler-
ating, the set speed resumes. However, during vehicle-to-vehicle distance
control mode, the vehicle speed may decrease below the set speed in order
to maintain the distance to the preceding vehicle.

■

When the vehicle stops while follow-up cruising

●

Pushing the lever up while the vehicle ahead stops will resume follow-up
cruising if the vehicle ahead starts off within approximately 3 seconds after
the lever is pushed up.

●

If the vehicle ahead starts off within 3 seconds after your vehicle stops, fol-
low-up cruising will be resumed.

■

Automatic cancelation of vehicle-to-vehicle distance control mode

Vehicle-to-vehicle distance control mode is automatically canceled in the fol-
lowing situations.

●

VSC is activated.

●

TRC is activated for a period of time.

●

When the VSC or TRC system is turned off.

●

The sensor cannot detect correctly because it is covered in some way.

●

When the brake control or output restriction control of a driving support sys-
tem operates. (For example: Pre-Collision System, Drive-Start Control)

●

The parking brake is operated.

●

The vehicle is stopped by system control on a steep incline.

●

The following are detected when the vehicle has been stopped by system
control:
• The driver is not wearing a seat belt.
• The driver’s door is opened.
• The vehicle has been stopped for about 3 minutes.
The shift position may automatically change to P. (



P. 256)

If vehicle-to-vehicle distance control mode is automatically canceled for any
reasons other than the above, there may be a malfunction in the system.
Contact any authorized Toyota retailer or Toyota authorized repairer, or any
reliable repairer.

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Automatic cancelation of constant speed control mode

Constant speed control mode is automatically canceled in the following situa-
tions:

●

Actual vehicle speed is more than approximately 16 km/h (10 mph) below
the set vehicle speed.

●

Actual vehicle speed falls below approximately 30 km/h (20 mph).

●

VSC is activated.

●

TRC is activated for a period of time.

●

When the VSC or TRC system is turned off.

●

When the brake control or output restriction control of a driving support sys-
tem operates. (For example: Pre-Collision System, Drive-Start Control)

If constant speed control mode is automatically canceled for any reasons
other than the above, there may be a malfunction in the system. Contact any
authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer.

■

The Dynamic Radar Cruise Control with Road Sign Assist may not oper-
ate properly when (vehicles with RSA [Road Sign Assist])

As the Dynamic Radar Cruise Control with Road Sign Assist may not oper-
ate properly in conditions in which RSA may not operate or detect correctly
(



P. 327), when using this function, make sure to check the speed limit

sign displayed.
In the following situations, the set speed may not be changed to the recog-
nized speed limit by pushing the lever up or down.

●

If speed limit information is not available

●

When the recognized speed limit is the same as the set speed

●

When the recognized speed limit is outside of the speed range that the
dynamic radar cruise control system can operate

■

Brake operation

A brake operation sound may be heard and the brake pedal response may
change, but these are not malfunctions.

■

Warning messages and buzzers for dynamic radar cruise control with
full-speed range

Warning messages and buzzers are used to indicate a system malfunction or
to inform the driver of the need for caution while driving. If a warning message
is shown on the multi-information display, read the message and follow the
instructions. (



P. 294, 589)

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4-5. Using the driving support systems

■

When the sensor may not be correctly detecting the vehicle ahead

In the case of the following and depending on the conditions, operate the
brake pedal when deceleration of the system is insufficient or operate the
accelerator pedal when acceleration is required.
As the sensor may not be able to correctly detect these types of vehicles, the
approach warning (



P. 339) may not be activated.

●

Vehicles that cut in suddenly

●

Vehicles traveling at low speeds

●

Vehicles that are not moving in the same lane

●

Vehicles with small rear ends (trailers with no load on board, etc.)

●

Motorcycles traveling in the same lane

●

When water or snow thrown up by the surrounding vehicles hinders the
detecting of the sensor

●

When your vehicle is pointing upwards
(caused by a heavy load in the luggage
compartment, etc.)

●

Preceding vehicle has an extremely high
ground clearance

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■

Conditions under which the vehicle-to-vehicle distance control mode
may not function correctly

In the case of the following conditions, operate the brake pedal (or accelera-
tor pedal, depending on the situation) as necessary.
As the sensor may not be able to correctly detect vehicles ahead, the system
may not operate properly.

●

When the vehicle ahead of you decelerates suddenly

●

When driving on a road surrounded by a structure, such as in a tunnel or on
a bridge

●

While the vehicle speed is decreasing to the set speed after the vehicle
accelerates by depressing the accelerator pedal

●

When the road curves or when the lanes
are narrow

●

When steering wheel operation or your
position in the lane is unstable

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4-5. Using the driving support systems

Cruise control



Use the cruise control to maintain a set speed without depressing the
accelerator pedal.
Use the cruise control on freeways and highways.

Indicators
Cruise control switch
Set speed



: If equipped

Summary of functions

1
2
3

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Press the “ON-OFF” button to
activate the cruise control. 

Cruise control indicator will come
on.
Press the button again to deacti-
vate the cruise control. 

Accelerate or decelerate, with
accelerator pedal operation, to
the desired vehicle speed
(above approximately 30 km/h
[20 mph]) and push the lever
down to set the speed.

Cruise control “SET” indicator will
come on.
The vehicle speed at the moment
the lever is released becomes the
set speed.

Setting the vehicle speed

1

2

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4-5. Using the driving support systems

To change the set speed, operate the lever until the desired set speed
is obtained.

Increases the speed
Decreases the speed

Fine adjustment: Momentarily
move the lever in the desired direc-
tion.
Large adjustment: Hold the lever in
the desired direction.

The set speed will be increased or decreased as follows:
Fine adjustment: By approximately 1 km/h (0.6 mph) or 1 mph (1.6 km/h)
each time the lever is operated
Large adjustment: The set speed can be increased or decreased continu-
ally until the lever is released.

Pulling the lever toward you
cancels the constant speed
control.

The speed setting is also canceled
when the brake pedal is
depressed.

Pushing the lever up resumes
the constant speed control.

However, resuming is available
when the vehicle speed is more
than approximately 30 km/h
(20 mph).

Adjusting the set speed

1
2

Canceling and resuming the constant speed control

1

2

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■

Cruise control can be set when

●

The shift position is in D.

●

Vehicle speed is above approximately 30 km/h (20 mph). 

■

Accelerating after setting the vehicle speed

●

The vehicle can be accelerated by operating accelerator pedal. After accel-
eration, the set speed resumes.

●

Even without canceling the cruise control, the set speed can be increased
by first accelerating the vehicle to the desired speed and then pushing the
lever down to set the new speed.

■

Automatic cancelation of cruise control

Cruise control is automatically canceled in any of the following situations.

●

Actual vehicle speed falls more than approximately 16 km/h (10 mph) below
the set speed.
At this time, the memorized set speed is not retained.

●

Actual vehicle speed is below approximately 30 km/h (20 mph).

●

VSC is activated.

●

TRC is activated for a period of time.

●

When the VSC or TRC system is turned off.

■

If “Cruise Control Malfunction Visit Your Dealer” is displayed on the
multi-information display

Press the “ON-OFF” button once to deactivate the system, and then press
the button again to reactivate the system. 
If the cruise control speed cannot be set or if the cruise control cancels imme-
diately after being activated, there may be a malfunction in the cruise control
system. Have the vehicle inspected by any authorized Toyota retailer or
Toyota authorized repairer, or any reliable repairer.

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4-5. Using the driving support systems

WARNING

■

To avoid operating the cruise control by mistake

Switch the cruise control off using the “ON-OFF” button when not in use.

■

Situations unsuitable for cruise control

Do not use cruise control in any of the following situations.
Doing so may result in loss of control and could cause an accident resulting
in death or serious injury.

●

Roads where there are pedestrians, cyclists, etc.

●

In heavy traffic

●

On roads with sharp bends

●

On winding roads

●

On slippery roads, such as those covered with rain, ice or snow

●

On steep downhills
Vehicle speed may exceed the set speed when driving down a steep hill.

●

When your vehicle is towing a trailer

*

 or during emergency towing

*

: Vehicles that can tow a trailer: 



P. 233

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Driving mode select switch

Repeatedly press the switch until the system changes to the intended
driving mode.

Each time the switch is pressed, the driving mode changes in the following
order and the “ECO MODE” and “PWR MODE” indicators turn on or off
accordingly.

In response to driving conditions, one of 3 driving modes can be
selected.

Driving modes

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4-5. Using the driving support systems

Normal mode
Suitable for normal driving.

When normal mode is selected, the “ECO MODE” and “PWR MODE”
indicators turn off.

Power mode
Suitable for when crisp handling and enhanced accelerator
response are desired, such as when driving on mountainous roads.

When power mode is selected, the “PWR MODE” indicator will illumi-
nate on the main display.

Eco drive mode
Suitable for driving that improves fuel economy by generating
torque in response to accelerator pedal operations more smoothly
than in normal mode.

When Eco drive mode is selected, the “ECO MODE” indicator will illumi-
nate on the main display.
While the air conditioning is being used, the system automatically
switches to air conditioning eco mode (



P. 462), allowing for driving

that leads to even better fuel economy.

■

When canceling Eco drive mode/power mode

●

Press the switch again. Also, power mode will be canceled automatically
when the power switch is turned off.

●

However, Normal mode and Eco drive mode will not be canceled automati-
cally until the switch is pressed, even if the power switch is turned off.

■

Switching the driving mode when in EV drive mode



P. 251

1

2

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Speed limiter



Press the switch to activate the
speed limiter.

Press the switch once more to
deactivate the speed limiter.

Accelerate or decelerate to the
desired speed and push the lever
down to set the desired maximum
speed.

If the lever is pushed down while
the vehicle is stopped or being
driven of 30 km/h (19 mph) or less,
the set speed will be 30 km/h
(19 mph).



: If equipped

A desired maximum speed can be set using the cruise control
switch. 
The speed limiter prevents vehicle speed from exceeding the set
speed.

Setting the vehicle speed

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4-5. Using the driving support systems

Increase speed
Decrease speed

Hold the lever until the desired
speed setting is obtained.
Fine adjustment of the set speed
can be made by lightly pushing the
lever up or down and releasing it.

Cancel

Pull the lever towards you to can-
cel the speed limiter.

Resume

To resume use of the speed limiter,
push the lever up.

■

Exceeding the set speed

In the following situations, the vehicle speed exceeds the set speed, and
main display will be highlighted:

Adjusting the speed setting

1
2

Canceling and resuming the speed limiter

1

2

●

When fully depressing the accelerator
pedal

●

When driving down a hill (a buzzer also
sounds)

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Automatic speed limiter cancellation

The set speed is automatically canceled in any of the situations:

●

Cruise control is activated.

●

When the VSC system and/or TRC system is turned off.

■

If the “Speed Limiter Malfunction Visit Your Dealer” is displayed on the
multi-information display

Stop in a safe location, turn the power switch off and back on again, and then
set the speed limiter. If the speed limiter cannot be set, the system may be
malfunctioning. Even though the vehicle can be driven normally, have the
vehicle inspected by any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.

WARNING

■

To avoid operating the speed limiter by mistake

Keep the speed limiter switch off when not in use.

■

Situations unsuitable for speed limiter

Do not use the speed limiter in either of the following situations. 
Doing so may result in control of the vehicle being lost and could cause a
serious or fatal accident.

●

On slippery roads, such as those covered with rain, ice or snow

●

On steep hills

●

When towing a trailer or emergency towing

NOTICE

When a warning is issued using the meter display and buzzer after exceed-
ing the set speed limit on a steep decline, depress the brake pedal to decel-
erate.

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4-5. Using the driving support systems

BSM (Blind Spot Monitor)



The Blind Spot Monitor is a system that has 2 functions;

●

The Blind Spot Monitor function 
Assists the driver in making the decision when changing lanes

●

The Rear Crossing Traffic Alert function 
Assists the driver when backing up

These functions use same sensors.

Outside rear view mirror indicators

Blind Spot Monitor function: 
When a vehicle is detected in the blind spot, the outside rear view mirror
indicator comes on while the turn signal lever is not operated. If the turn
signal lever is operated toward the detected side, the outside rear view
mirror indicator flashes.
Rear Crossing Traffic Alert function: 
When a vehicle approaching from the right or left rear of the vehicle is
detected, the outside rear view mirror indicators flash.



: If equipped

Summary of the Blind Spot Monitor

1

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The Blind Spot Monitor on/off screen and indicator

The Blind Spot Monitor function and Rear Crossing Traffic Alert function
can be switched on and off using the multi-information display. (



P. 153)

When switched on, the BSM indicator illuminates on the meter and the
buzzer sounds.

Rear Crossing Traffic Alert buzzer (Rear Crossing Traffic Alert func-
tion only)

When a vehicle approaching from the right or left rear of the vehicle is
detected, a buzzer sounds from the driver’s side instrument panel.

RCTA detection screen (RCTA function only)

If a vehicle approaching from the right or left at the rear of the vehicle is
detected, the RCTA detection screen will be shown on the multi-informa-
tion display.

The Blind Spot Monitor function and Rear Crossing Traffic Alert func-

tion can be enabled/disabled on the 

 screen (



P. 153) of the

multi-information display.

Once the systems are disabled, the systems will not be enabled until they

are enabled by the 

 screen of multi-information display again. (The

systems are not automatically enabled even when the hybrid system is
restarted.)

Changing settings of the Blind Spot Monitor function and Rear
Crossing Traffic Alert function

2

3

4