2022 TOYOTA PRIUS PLUG-IN HYBRID ECO mode

4135-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
5
Driving
When this function is enabled and the system is operating in vehicle-
to-vehicle distance control mode (P. 405), when a speed limit sign is
detected, the recognized speed limit will be displayed with an up/
down arrow. The set speed can be increased/reduced to the recog-
nized speed limit by pushing the lever up or down.
OWhen the current set speed is
lower than the recognized
speed limit
Push the lever up.
OWhen the current set speed is
higher than the recognized
speed limit
Push the lever down.
Dynamic Radar Cruise Control with Road Sign Assist can be enabled/
disabled in on the multi-information display. (P. 220)
When the Dynamic Radar Cruise Control with Road Sign Assist is
operating, while driving down a hill, the vehicle speed may exceed the
set speed.
In this case, the displayed set vehicle speed will be highlighted and a
buzzer will sound to alert the driver.
Dynamic Radar Cruise Control with Road Sign Assist
Enabling/Disabling the Dynamic Radar Cruise Control with Road
Sign Assist

4145-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
QDynamic radar cruise control with full-speed range can be set when
OThe shift position is in D.
OThe 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].)
QAccelerating 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.
QWhen the vehicle stops while follow-up cruising
OPushing 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.
OIf the vehicle ahead starts off within 3 seconds after your vehicle stops, fol-
low-up cruising will be resumed.
QAutomatic cancelation of vehicle-to-vehicle distance control mode
Vehicle-to-vehicle distance control mode is automatically canceled in the fol-
lowing situations.
OVSC is activated.
OTRC is activated for a period of time.
OWhen the VSC or TRC system is turned off.
OThe sensor cannot detect correctly because it is covered in some way.
OWhen the brake control or output restriction control of a driving support sys-
tem operates.
(For example: Pre-Collision System, Drive-Start Control)
OThe parking brake is operated.
OThe vehicle is stopped by system control on a steep incline.
OThe 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. 332)
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.

4155-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
5
Driving
QAutomatic cancelation of constant speed control mode
Constant speed control mode is automatically canceled in the following situa-
tions:
OActual vehicle speed is more than approximately 16 km/h (10 mph) below
the set vehicle speed.
OActual vehicle speed falls below approximately 30 km/h (20 mph).
OVSC is activated.
OTRC is activated for a period of time.
OWhen the VSC or TRC system is turned off.
OWhen 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.
QThe Dynamic Radar Cruise Control with Road Sign Assist may not oper-
ate properly when
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. 399), 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.
OIf speed limit information is not available
OWhen the recognized speed limit is the same as the set speed
OWhen the recognized speed limit is outside of the speed range that the
dynamic radar cruise control system can operate
QBrake operation
A brake operation sound may be heard and the brake pedal response may
change, but these are not malfunctions.
QWarning 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. 366, 665)

4185-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
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

4195-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
5
Driving
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 fan speed setting mode will
be changed to “ECO” mode automatically (P. 526), allowing for driving
that leads to even better fuel economy.
QAutomatic deactivation of power mode
OPower mode will be canceled and changed to normal mode automatically
when the power switch is turned off.
OHowever, 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.
1
2
3

5266-1. Using the air conditioning system and defogger
Prius Plug-in Hybrid_OM_OM47E75E_(EE)Q
Switching between outside air and recirculated air modes
Press .
The mode switches between outside air mode and recirculated air mode
each time is pressed.
The indicator illuminates when the recirculated air mode is
selected.
Q
Blower customization
Fan speed setting during the automatic mode operation can be cus-
tomized.
To change the fan speed setting mode, press .
Each time is pressed, the fan speed setting mode changes as
follows.
“NORMAL”  “ECO”  “FAST”  “NORMAL”
When “ECO” is displayed on the air conditioning screen, the air condi-
tioning is controlled with low fuel consumption prioritized such as reduc-
ing fan speed, etc.
When “FAST” is displayed on the screen, fan speed will be increased.
Other functions

5276-1. Using the air conditioning system and defogger
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
6
Interior features
QDefogging the windshield
Defoggers are used to defog the windshield and front side win-
dows.
Press .
Set to outside air mode if the recirculated air mode is used. (It
may switch automatically.)
To defog the windshield and the side windows early, turn the air flow and
temperature up.
The indicator illuminates when the defoggers are on.
To return to the previous mode, press again when the wind-
shield is defogged. Also, turning the power switch off during operation
can return to the previous mode.
Q
Defogging the rear window and outside rear view mirrors
Defoggers are used to defog the rear window and to remove rain-
drops, dew and frost from the outside rear view mirrors.
Press .
Defoggers switch between on and off each time is pressed.
The indicator illuminates when defoggers are on.
The defoggers will automatically turn off after a period of time.
Q
Eco score (A/C score)
P. 2 4 4

5296-1. Using the air conditioning system and defogger
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
6
Interior features
QHeating
O In HV mode, the gasoline engine may operate in order to extract heat from
the engine coolant via the heater.
O In EV mode, heating is done by a heat pump system.
• When the outside temperature is low or it is snowing, compared to con-
ventional vehicles, heating may be less effective and warm air may not
come out.
• If frost has formed on the outside heat exchanger, the heating perfor-
mance will decline. The frost can be removed from the outside h eat
exchanger by operating the Remote Air Conditioning System befor e driv-
ing ( P. 535). When frosted over, the heating operation of the Remote
Air Conditioning System starts after defrosting.
• When is turned on, the heating is controlled optimally. There fore,
the set heating performance may not be achieved even if the fan speed
setting is increased.
O In the following situations the gasoline engine may operate in order to
extract heat from the engine coolant via the heater even in EV mode.
• The outside temperature is approx imately -10°C (14°F) or low
• is operating
Q Using automatic mode
Fan speed is adjusted automatically according to the temperatur e setting and
the ambient conditions.
Therefore, the fan may stop for a while until warm or cool air is ready to flow
immediately after is pressed.
• When the outside heat exchanger is
frosted over, fan speed declines and it
may become harder to heat the inte-
rior. However, it is not a malfunction.
In this situation, the air temperature
from the outlets may not change even
though the set temperature is raised.Outside heat exchanger