key battery TOYOTA PRIUS PLUG-IN HYBRID 2020 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

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)

1242-2. Charging
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■Except during charging
The hybrid battery (traction battery) status indicators illuminate
*1
while the charging port lid is open and any of the followings are per-
formed.
●When an electronic key is carried near the effective range
*2
(P. 294)
●When the doors are unlocked
*1: The indicators illuminate for a maximum of approximately 15 seconds.
*2: Excluding the effective range of the charging port lid.
■When the hybrid battery (traction battery) is fully charged
When the charging cable is connected, all 3 hybrid battery (traction battery)
status indicators illuminate to inform the user that the hybrid battery (traction
battery) is fully charged.
*
*
: If the push lifter (P. 171) is pushed in, the hybrid battery (traction battery)
status indicators may flash.
Charging status of the
hybrid battery
(traction battery)Hybrid battery (traction battery) status indicator
About less than halfIlluminatedNot illuminatedNot illuminated
About more than halfIlluminatedIlluminatedNot illuminated
FullIlluminatedIlluminatedIlluminated
123

1682-2. Charging
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
If the charging indicator flashes
after inserting the charging con-
nector:
The charge schedule is regis-
tered (P. 176). Carry an elec-
tronic key and press the
charging connector lock switch
to unlock the charging connec-
tor.
After temporarily removing the charging connector, reinsert it within
approximately 5 seconds. (P. 168)
If the error warning indicator on the CCID (Charging Circuit Interrupting
Device) flashes during charging, check P. 130 and follow the correction
procedure.
The charging indicator will turn off when charging is completed.
■During charging
●The surface of the CCID (Charging Circuit Interrupting Device) may become
hot, but this does not indicate a malfunction. (When using Mode 2 charging
cable.)
●Depending on radio wave conditions, interference may be heard on the
radio.
●The current charging condition and the estimated time until charging will
complete can be checked on the multi-information display. (P. 159)
●During charging, the hybrid battery (traction battery) status indicator illumi-
nates and flashes, and changes according to the charging amount.
(P. 123)
■If the charging indicator flashes after connecting the charging cable
The charge schedule (P. 176) is registered and charging cannot be per-
formed. To cancel charging using the charging schedule and start charging,
perform any of the following procedures.
●Turn “Charge Now” on (P. 184)
●While the charging indicator is flashing, remove and reconnect the charging
connector within 5 seconds
■When the charging connector cannot be inserted into the charging inlet
P. 145

1712-2. Charging
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Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■Charging time
 P. 153
■ Safety function
Charging will not start when the charging connector is not locked. If the
charging indicator does not illuminate even when the charging connector is
inserted, remove and reinsert the connector, and then check that the charging
indicator illuminates.
■ When the outside temperature is low or high
The level shown on the remaining charge display ( P. 242) may drop slightly
when the power switch is turned to ON mode, even if charging has been com-
pleted and the hybrid battery (traction battery) is fully charged. However, this
does not indicate a malfunction.
■ Charging time may increase
 P. 154
■ While charging
When the power switch is turned to ON mode and the energy monitor dis-
plays, the charging connector is displayed on the energy monitor and the flow
of electricity during charging is displayed ( P. 233). Also, when the charging
connector is locked, is displayed.
■ If the charging cable cannot be unlocked
 P. 146
■ When removing the charging connector
■ Push lifter
Carry an electronic key and press the
charging connector lock switch and check
that the lock is released, and then pull the
charging connector towards you.
When the charging port lid is open, make
sure not to touch the push lifter. If it is
touched accidentally, the charging port lid
or connector lock may operate.
If they are accidentally operated, carry an
electronic key or unlock the doors, and
then press the charging connector lock
switch to unlock.Push lifter

2804-1. Key information
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■Electronic key battery depletion
●The standard battery life is 1 to 2 years.
●If the battery becomes low, an alarm will sound in the cabin and a message
will be displayed on the multi-information display when the hybrid system
stops.
●As the electronic key always receives radio waves, the battery will become
depleted even if the electronic key is not used. The following symptoms indi-
cate that the electronic key battery may be depleted. Replace the battery
when necessary. (P. 688)
• The smart entry & start system or the wireless remote control does not
operate.
• The detection area becomes smaller.
• The LED indicator on the key surface does not turn on.
You can replace the battery by yourself (P. 688). However, as there is a
danger that the electronic key may be damaged, it is recommended that
replacement is carried out by any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer.
●To avoid serious deterioration, do not leave the electronic key within 1 m
(3 ft.) of the following electrical appliances that produce a magnetic field:
•TVs
• Personal computers
• Cellular phones, cordless phones and battery chargers
• Table lamps
• Induction cookers

2814-1. Key information
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
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Operation of each component
■If a message regarding the state of the electronic key or power switch
mode, etc. is shown
To prevent trapping the electronic key inside the vehicle, leaving the vehicle
without turning off the power switch or other passengers from unintentionally
taking the key out of the vehicle, etc., a message that prompts the user to
confirm the state of the electronic key or power switch mode may be shown
on the multi-information display. In those cases, follow the instructions on the
display immediately.
■If “Key Battery Low Replace Key Battery” is displayed on the multi-infor-
mation display
The electronic key has a low battery. Replace the electronic key battery.
(P. 688)
■Replacing the battery
P. 688
■Confirmation of the registered key number
The number of keys already registered to the vehicle can be confirmed. Ask
any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer.
■If “A New Key has been Registered Contact Your Dealer for Details” is
displayed on the multi-information display
This message will be displayed each time the driver’s door is opened when
the doors are unlocked from the outside for approximately 10 days after a
new electronic key has been registered.
If this message is displayed but you have not had a new electronic key regis-
tered, ask any authorized Toyota retailer or Toyota authorized repairer, or any
reliable repairer to check if an unknown electronic key (other than those in
your possession) has been registered.
■If a wrong key is used
The key cylinder rotates freely to isolate inside mechanism.

2844-2. Opening, closing and locking the doors
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■Operation signals
The emergency flashers flash to indicate that the doors have been locked/
unlocked. (Locked: Once; Unlocked: Twice)
■Security feature
If a door is not opened within approximately 30 seconds after the vehicle is
unlocked, the security feature automatically locks the vehicle again.
■When the door cannot be locked by the lock sensor on the surface of the
door handle
■Door lock buzzer
If an attempt to lock the doors is made when a door is not fully closed, a
buzzer sounds continuously for 5 seconds. Fully close the door to stop the
buzzer, and lock the vehicle once more.
■Setting the alarm (if equipped)
Locking the doors will set the alarm system. (P. 87)
■If the smart entry & start system or the wireless remote control does not
operate properly
●Use the mechanical key to lock and unlock the doors. (P. 751)
●Replace the key battery with a new one if it is depleted. (P. 688) When the door cannot be locked even if
the lock sensor on the surface of the door
handle is touched by a finger, touch the
lock sensor with the palm.
When gloves are being worn, remove the
gloves.

2954-2. Opening, closing and locking the doors
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
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Operation of each component
■ When “Smart Entry & Start System Malfunction See Owner’s Manual” is
displayed on the multi-information display
The system may be malfunctioning. Have the vehicle inspected by any autho-
rized Toyota retailer or Toyota authorized repairer, or any reliable repairer
immediately.
■ Battery-saving function
The battery-saving function will be activated in order to prevent the electronic
key battery and the 12-volt battery from being discharged while the vehicle is
not in operation for a long time.
● In the following situations, the smart entry & start system may take some
time to unlock the doors.
• The electronic key has been left in an area of approximately 2 m (6 ft.) of
the outside of the vehicle for 10 minutes or longer.
• The smart entry & start system has not been used for 5 days or longer.
● If the smart entry & start system has not been used for 14 days or longer,
the doors cannot be unlocked at any doors except the driver’s door. In this
case, take hold of the driver’s door handle, or use the wireless remote con-
trol or the mechanical key, to unlock the doors.
■ Electronic Key Battery-Saving Function
When battery-saving mode is set, battery depletion is minimized by stopping
the electronic key from receiving radio waves.
Press twice while pressing and
holding . Confirm that the electronic
key indicator flashes 4 times.
While the battery-saving mode is set, the
smart entry & start system cannot be
used. To cancel the function, press any of
the electronic key buttons.

2964-2. Opening, closing and locking the doors
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■Conditions affecting operation
The smart entry & start system, wireless remote control and immobilizer sys-
tem use weak radio waves. In the following situations, the communication
between the electronic key and the vehicle may be affected, preventing the
smart entry & start system, wireless remote control and immobilizer system
from operating properly. (Ways of coping: P. 751)
●When the electronic key battery is depleted
●Near a TV tower, electric power plant, gas station, radio station, large dis-
play, airport or other facility that generates strong radio waves or electrical
noise
●When the electronic key is in contact with, or is covered by the following
metallic objects
• Cards to which aluminum foil is attached
• Cigarette boxes that have aluminum foil inside
• Metallic wallets or bags
• Coins
• Hand warmers made of metal
• Media such as CDs and DVDs
●When other wireless key (that emit radio waves) is being used nearby
●When carrying the electronic key together with the following devices that
emit radio waves
• Portable radio, cellular phone, cordless phone or other wireless commu-
nication devices
• Another vehicle’s electronic key or a wireless key that emits radio waves
• Personal computers or personal digital assistants (PDAs)
• Digital audio players
• Portable game systems
●If window tint with a metallic content or metallic objects are attached to the
rear window
●When the electronic key is placed near a battery charger or electronic
devices