
PRIUS PRIME_OM_OM47A88U_(U)
912-1. Plug-in hybrid system
2
Plug-in hybrid system
There are air intake vents on both
sides of the rear seatback for the
purpose of cooling the hybrid bat-
tery (traction battery). If the vents
become blocked, the hybrid bat-
tery (traction battery) may over-
heat, leading to a reduction in
hybrid battery (traction battery)
output.
When a certain level of impact is detected by the impact sensor, the
emergency shut off syst em blocks off the high voltage current and
stops the fuel pump to minimize the risk of electrocution and fuel leak-
age. If the emergency shut off syst em activates, your vehicle will not
restart. To restart the hybrid system, contact your Toyota dealer.
A message is automatically displa yed when a malfunction occurs in
the hybrid system or an improper operation is attempted.
If a warning message is shown on
the multi-information display, read
the message and follow the
instructions.
Hybrid battery (traction battery) air vents
Emergency shut off system
Hybrid warning message

PRIUS PRIME_OM_OM47A88U_(U)
1272-2. Charging
2
Plug-in hybrid system
■Hybrid battery (traction battery) warming control (Alaska and
Canada only)
This control operates after the charging cable remains connected to
the vehicle for 3 days and “Traction Battery Heater” automatically
stops. It automatically insulates th e hybrid battery (traction battery)
in extremely low temperatures.
● This control stops 31 days after the charging cable is connected,
even if it is still co nnected to the vehicle.
● When this control operates, timer charging settings are ignored
and charging starts immediately.
■“Traction Battery Cooler”
When the hybrid battery (traction ba ttery) is hot, this function pro-
tects it by using the vehicle ai r conditioning to cool it before
charging is carried out.
When the hybrid battery (trac-
tion battery) is above a certain
temperature and the power
switch is turned off, a check
screen is displayed on the
multi-information display that
indicates whether “Traction Bat-
tery Cooler” is implemented.
When “No” is selected, the hybrid battery (traction battery) cooling sys-
tem does not operate.
■ “Traction Battery Heater”
●“Traction Battery Heater” may operate when charging is not being per-
formed.
● When “Traction Battery Heater” is operating, the charging indicator illumi-
nates.
● When “Traction Battery Heater” is operating during charging, the charging
time may be longer than normal.
● If the outside temperature becomes high while “Traction Battery Heater” is
operating, charging may complete earlier than the “Departure” time set.
(→P. 147)
● “Traction Battery Heater” can be turned on and off in the “Vehicle Settings”
settings on the multi-information display. ( →P. 732)

128
PRIUS PRIME_OM_OM47A88U_(U)
2-2. Charging
■“Traction Battery Cooler”
●When the hybrid battery (traction battery) is above a certain temperature
and the power switch is turned off, a check screen is displayed on the multi-
information display that indicates whether “Traction Battery Cooler” is imple-
mented. Approximately 5 minutes after selecting “Yes” on this screen, sys-
tem operation becomes possible.
● When charging starts, “Traction Battery Cooler” only operates if the hybrid
battery (traction battery) temperature is hot.
● The charging indicator is illuminated while “Traction Battery Cooler” is on
standby or operating.
● “Traction Battery Cooler” is implem ented for a maximum of approximately
30 minutes. However, when the “Departure” time is set ( →P. 147) and there
is not sufficient time between the current time and the time that charging will
complete, “Traction Battery Cooler” operation time may become shorter.
● When there is a small amount of remaining charge in the hybrid battery
(traction battery), even if the hybrid battery (traction battery) is hot, “Traction
Battery Cooler” may not be implemented.
● When the following operations are performed while “Traction Battery Cooler”
is operating, the hybrid battery (traction battery) cooling operation stops.
• A door is opened
• The hood is opened
• The power switch is turned to any mode other than off
• The shift position is changed to any position other than P
• The Remote Air Conditioning System is operated ( →P. 509)
• “Charge Now” is implemented ( →P. 156, 165)
• The amount of remaining charge in the hybrid battery (traction battery) is
below a certain amount
● When the power switch is turned off, a check screen is displayed on the
multi-information display that indicates whether “Traction Battery Cooler” is
implemented. This check screen can be turned on and off in the “Meter Cus-
tomize” settings on the multi-information display ( →P. 234). However, when
the check screen is set to “Off”, “Traction Battery Cooler” is no longer oper-
ates.
● “Traction Battery Cooler” uses the power of the hybrid battery (traction bat-
tery) and external power source.
• While “Traction Battery Cooler” is operating, the amount of the remaining
charge of the hybrid battery (traction battery) increases and decreases in
a certain range, and does not increase as in normal charging.
• The operation of “Traction Battery Cooler” is recognized as charging by a
charging equipment. The charging equipment that calculates the fee
according to charging time causes a charging fee.

132
PRIUS PRIME_OM_OM47A88U_(U)
2-2. Charging
Before charging, always check the following items.
●The parking brake is applied.( →P. 337)
● The headlights are switched off or set to AUTO, and lights such as
the emergency flashers and interior lights etc. are switched off.
If these light switches are turned ON, then these features will consume
electricity, and charging time will increase.
●The power switch is off. ( →P. 324)
Before charging, make sure that ea ch part of the charging cable is in
good condition. ( →P. 11 2 )
■Safety functions
●The hybrid system will not start while the charging cable is attached to the
vehicle, even if the power switch is operated.
● If the charging cable is connected while the “READY” indicator is illumi-
nated, the hybrid system will stop automatically and driving will not be possi-
ble.
● When the charging cable is connected to the vehicle, the shift position can-
not be changed from P to another position.
■ During charging
The followings occur, however, it does not indicate a malfunction.
●The charging starting time may differ depending on the state of the vehicle.
● During charging, the sound of the fan may be heard from the charging
equipment cooling air intake vents. ( →P. 135)
● During and after charging, the rear seat and its surrounding area in which
the charging equipment is installed may get warm.
Confirm the following before charging
Inspecting the charging cable

PRIUS PRIME_OM_OM47A88U_(U)
1412-2. Charging
2
Plug-in hybrid system
Remove the plug from the out-
let when the charging equip-
ment will not be used for a
prolonged period of time.
Hold the body of the plug when
removing.
Make sure to put the cable away
immediately after disconnecting.
(→P. 145)
When leaving the plug inserted, inspect the plug and connector once a
month to check if dirt or dust has accumulated.
■ Charging time
→P. 125
■ Safety function
If the latch release button is pressed, charging will not begin even if the
charging cable is connected.
Also, charging will be stopped if the latch release button is pressed and held
for several seconds during charging. When restarting charging, reinsert the
charging connector after pulling it out, and check that the charging indicator
illuminates.
■ When the outside temper ature is low or high
The level shown on the remaining charge display ( →P. 216) 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. 126
■ 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. 208). Also, when the charging
connector is locked, is displayed.
*
*
: Vehicles with smart lid & connector locking system only
5

PRIUS PRIME_OM_OM47A88U_(U)
1592-2. Charging
2
Plug-in hybrid system
■To return to original setting after changing “Next Charging Event” set-
ting
Turning the setting of “Charge Now” on and then off can return the setting of
“Next Charging Event” to its original setting.
■ When “Next Charging Event” is changed while charging
● When the charging mode is “Departure”, the current charging is interrupted
or continued depending on the remaining time until the charging is com-
pleted.
● When the charging mode is “Start”, the current charging is interrupted, the
next charging will start at the set time.
■ When the power switch is turned off
*2: When the power switch is turned off, the “Next Charging Event” confirma-
tion screen may be displayed.
It is possible to check the next charge
schedule (“Next Charging Event”) by oper-
ating or of the meter control
switches while the power switch is turned
off and the “Ending” screen
*1 (
→ P. 184) is
displayed.
*2
*1: The “Ending” screen may not be dis- played during charging.
WARNING
■ Cautions while performing the setting operation
When performing the setting operation while the hybrid system is operated,
ensure that the vehicle is parked in a place with adequate ventilation. In a
closed area such as a garage, exhaust gases including harmful carbon
monoxide (CO) may collect and enter the vehicle. This may lead to death or
a serious health hazard.
NOTICE
■While performing the setting operation
When performing the setting operation while the hybrid system is stopped,
be careful that the 12-volt battery will not be discharged.

170
PRIUS PRIME_OM_OM47A88U_(U)
2-2. Charging
When normal charging cannot be carried
out
Refer to the following table and carry out the appropriate correction
procedure.
When charging does not start, even though the normal proce-
dure is followed, check each of the following items.
If a message is shown on the multi- information display, also refer to
P. 175.
When normal charging cannot be carried out
Likely causeCorrection procedure
The power source indicator on the CCID (Charging Circuit Interrupting
Device) does not illuminate, even though the plug is connected to an
external power source.
Plug is not properly connected to
outletCheck that the plug is properly con-
nected to the outlet.
Power is outAfter power is restored, carry out the
charging procedure again.
Building breaker is tripped and
power is cut off
Check that the breaker is connected
and if there is no malfunction, check
if the vehicle can be charged
through another outlet.
If charging is possible, the first outlet
may have a malfunction. Contact the
building or facility manager, or an
electrician.
Short circuit between CCID
(Charging Circuit Interrupting
Device) and plugImmediately stop charging and con-
tact your Toyota dealer.

PRIUS PRIME_OM_OM47A88U_(U)
1712-2. Charging
2
Plug-in hybrid system
*: Refer to P. 106 for details regarding charging indicator illumination andflashing.
The error warning indicator on the CCID (Charging Circuit Interrupting
Device) flashes.
Electrical leakage detection function
or self- diagnostic function operates
and power is cut off
When the voltage is insufficient, the
error warning indicator may flash
when there is noise interference.
Perform a reset and connect to a
proper power source. ( →P. 110)
If charging does not start, immedi-
ately stop charging and contact your
Toyota dealer.
Charging indicator does not illuminate, even though charging connector
is connected.
The plug is not properly connected
to the outletCheck whether the plug is properly
connected to the outlet.
Charging connector is not securely
connected to charging inlet
Check the connection status of the
charging connector.
If the charging indicator does not
illuminate, even though the charging
connector is securely connected,
there may be a malfunction in the
system. Immediately stop charging
and contact your Toyota dealer.
Hybrid battery (traction battery) is
already fully chargedWhen the hybrid battery (traction
battery) is fully charged, charging is
not performed.
The charging equipment does not
operatePlease contact the facility manager
when there is a problem with
charging equipment.
Charging indicator flashes and charging cannot be carried out.
When charging indicator slowly
flashes
*:
Charge schedule is registered
When you wish to charge according
to the timer, wait until the set time.
To immediately start charging, set
“Charge Now” to “On”.
( → P. 156, 165)
When charging indicator rapidly
flashes
*:
Malfunction occurred in an external
power source or the vehicle
Start the hybrid system and follow
the instructions displayed by the
message on the multi-information
display. ( →P. 175)
Likely causeCorrection procedure