battery TOYOTA PRIUS PLUG-IN HYBRID 2021 Owners Manual

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Prius Plug-in Hybrid_OM_OM47D72E_(EE)
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7-1. Maintenance and care
Cleaning and protecting
the vehicle exterior ..........616
Cleaning and protecting
the vehicle interior ...........622
7-2. Maintenance
Maintenance
requirements....................628
7-3. Do-it-yourself maintenance
Do-it-yourself service
precautions ......................631
Hood ..................................634
Positioning a floor jack .......636
Engine compartment..........637
Tires ...................................650
Tire inflation pressure ........665
Wheels ...............................667
Replacing the tire ...............669
Air conditioning filter ..........681
Wiper insert
replacement .....................685
Electronic key battery ........688
Checking and replacing
fuses ................................691
Light bulbs .........................695
8-1. Essential information
Emergency flashers .......... 704
If your vehicle has to
be stopped in an
emergency ...................... 705
If the vehicle is trapped in
rising water...................... 706
8-2. Steps to take in an
emergency
If your vehicle needs
to be towed ..................... 707
If you think something is
wrong .............................. 713
If a warning light turns on
or a warning buzzer
sounds ............................ 714
If a warning message is
displayed ......................... 723
If you have a flat tire .......... 731
If the hybrid system will
not start ........................... 749
If the electronic key does
not operate properly ........ 751
If the 12-volt battery is
discharged ...................... 755
If your vehicle
overheats ........................ 761
If the vehicle becomes
stuck................................ 766
7Maintenance and care8When trouble arises

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Prius Plug-in Hybrid_OM_OM47D72E_(EE)
The vehicle is equipped with sophisticated computers that will record certain
data, such as:
• Engine speed/Electric motor speed (traction motor speed)
• Accelerator status
• Brake status
• Vehicle speed
• Operation status of the driving assist systems
• Hybrid battery (traction battery) status
The recorded data varies according to the vehicle grade level, options and
destinations with which it is equipped.
These computers do not record conversations or sounds, and only record
images outside of the vehicle in certain situations.
●Data usage
Toyota may use the data recorded in this computer to diagnose malfunc-
tions, conduct research and development, and improve quality.
Toyota will not disclose the recorded data to a third party except:
• With the consent of the vehicle owner or with the consent of the lessee if
the vehicle is leased
• In response to an official request by the police, a court of law or a govern-
ment agency
• For use by Toyota in a lawsuit
• For research purposes where the data is not tied to a specific vehicle or
vehicle owner
The SRS airbag and seat belt pretensioner devices in your Toyota contain
explosive chemicals. If the vehicle is scrapped with the airbags and seat belt
pretensioners left as they are, this may cause an accident such as fire. Be
sure to have the systems of the SRS airbag and seat belt pretensioner
removed and disposed of by a qualified service shop or by any authorized
Toyota retailer or Toyota authorized repairer, or any reliable repairer, before
you scrap your vehicle.
Vehicle data recording
Scrapping of your Toyota

881-3. Theft deterrent system
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■System maintenance
The vehicle has a maintenance-free type alarm system.
■ Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure of
the following.
● Nobody is in the vehicle.
● The side windows are closed before the alarm is set.
● No valuables or other personal items are left in the vehicle.
■ Triggering of the alarm
The alarm may be triggered in the following situations:
(Stopping the alarm deactivates the alarm system.)
● The doors are unlocked using the
mechanical key.
● A person inside the vehicle opens a door
or hood, or unlocks the vehicle using an
inside lock button.
● The 12-volt battery is recharged or
replaced when the vehicle is locked.
( P. 755)

891-3. Theft deterrent system
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Prius Plug-in Hybrid_OM_OM47D72E_(EE)
For safety and security
■Alarm-operated door lock
In the following cases, depending on the situation, the door may automatically
lock to prevent improper entry into the vehicle:
● When a person remaining in the vehicle unlocks the door and the alarm is
activated.
● While the alarm is activated, a person remaining in the vehicle unlocks the
door.
● When recharging or replacing the 12-volt battery
NOTICE
■To ensure the system operates correctly
Do not modify or remove the system. If modified or removed, the proper
operation of the system cannot be guaranteed.

942-1. Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Plug-in hybrid system features
The illustration is an example for explanation and may differ from the
actual item.
Gasoline engine
Electric motor (traction motor)
The plug-in hybrid system is a system excellent in both econom-
ical efficiency of electric vehicles and practicality of hybrid vehi-
cles.
● EV driving can be performed using electricity charged from an
external power source.*
● If the amount of electricity remaining in the hybrid battery (traction
battery) becomes low, the vehicle is automatically controlled in
such a way that it can be driven as a hybrid vehicle through the
joint use of the gasoline engine.
*: The EV driving range will vary in accordance with conditions such as
vehicle speed, the amount of charge remaining in the hybrid battery
(traction battery) and the usage of the air conditioning system. The gaso-
line engine may also be used simultaneously in accordance with driving
conditions.
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952-1. Plug-in hybrid system
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Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
The plug-in hybrid system operates in the following modes.
The multi-information display can be used to check which mode the plug-in
hybrid system is currently being driven in. (P. 230)
EV mode
When a sufficient amount of electricity is remaining after
charging
*1, EV driving is performed using electricity stored in the
hybrid battery (traction battery).
*2
When in EV mode, the EV drive mode indicator illuminates.
*1: The amount of remaining charge can be checked on the multi-informa-
tion display etc. (P. 242)
*2: Depending on the situation, EV driving may be canceled and both gaso-
line engine and electric motor are used. (P. 104)
Plug-in hybrid system operation mode
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962-1. Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
EV City mode (P. 9 8 )
When a sufficient amount of electricity for EV driving is remaining in
the hybrid battery (traction battery)
*1, the operation mode can be
switched to EV City mode.
EV City mode limits motor output and minimizes the operation of
the gasoline engine.
*2 Therefore, the vehicle can be driven with
only electric motor (traction motor) in city areas, etc.
When in EV City mode, the EV City mode indicator illuminates.
*1: The amount of remaining charge can be checked on the multi-informa-
tion display etc. (P. 242)
*2: When acceleration is required, fully depress the accelerator pedal to
start the gasoline engine.
HV mode
When in HV mode, the vehicle is driven using both the gasoline
engine and electric motor (traction motor). (P. 102)
●If electricity needed for EV driving in EV mode is not remaining,
the operation mode will be automatically switched to HV mode.
●The operation mode can be switched to HV mode at any timing
by operating the switch to keep electricity for EV driving etc.
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(P. 98). Switching to HV mode when driving on a highway or
when driving uphill is recommended in order to conserve battery
power.
When in HV mode, the EV drive mode indicator and EV City mode indi-
cator turn off.
*: The EV driving range may reduce even after switching to HV mode.
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972-1. Plug-in hybrid system
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Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Hybrid battery (traction battery) charge mode (P. 9 9 )
Electricity generated in the gasoline engine can be charged in the
hybrid battery (traction battery) by switching to the hybrid battery
(traction battery) charge mode when electricity needed for EV driv-
ing is not remaining.*
●The system may not be able to switch to the hybrid battery (trac-
tion battery) charge mode due to the state of the plug-in hybrid
system. (P. 100)
●Charging time differs depending on the driving state of the vehi-
cle when driving in hybrid battery (traction battery) charge mode.
When in the hybrid battery (traction battery) charge mode, the hybrid
battery charge mode indicator illuminates.
*: When in the hybrid battery (traction battery) charge mode, the hybrid
battery can be charged while driving. However, the gasoline engine runs
to charge the battery and fuel consumption becomes higher compared
with driving in HV mode.
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982-1. Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
The plug-in hybrid system operation modes can be switched using the
switches.
If there is not enough charge remaining in the hybrid battery (traction bat-
tery) to allow EV driving, EV/EV City mode will not be selectable.
The hybrid battery (traction battery) charge mode cannot be selected if the
hybrid battery (traction battery) is almost completely charged.
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Switching between EV mode and HV mode
Press the EV/HV mode selection switch.
EV mode and HV mode will be switched between with each press.
When in EV mode, the EV drive mode indicator illuminates.
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Switching to EV City mode
Press the EV City mode switch.
The EV City mode indicator comes on.
To cancel EV City mode, press the EV City mode switch again.
Switching the plug-in hybrid system operation modes
Left-hand drive vehiclesRight-hand drive vehicles
Left-hand drive vehiclesRight-hand drive vehicles

992-1. Plug-in hybrid system
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Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■Switching to the hybrid battery (traction battery) charge mode
Press and hold the EV/HV mode selection switch.
Take your hand off the switch once the hybrid battery charge mode indi-
cator starts to blink.
The hybrid battery charge mode indicator illuminates when the switch to
hybrid battery (traction battery) charge mode is complete.
When the hybrid battery (traction battery) is fully charged
*, the hybrid
battery (traction battery) charge mode is automatically canceled and the
operation mode will be switched to HV mode.
The hybrid battery (traction battery) charge mode will be canceled by
pressing EV/HV mode selection switch or EV City mode switch.
*: The maximum charge amount in the hybrid battery (traction battery)
charge mode is approximately 80% of the fully charged capacity for the
charging from an external power source.
Left-hand drive vehiclesRight-hand drive vehicles