2020 TOYOTA PRIUS PRIME heater

PRIUS PRIME_OM_OM47C77U_(U)
1372-2. Charging
2
Plug-in hybrid system
■“Traction Battery Heater”
●“Traction Battery Heater” may operate when charging is not bein g per-
formed.
● When “Traction Battery Heater” is operating, the charging indicator illumi-
nates.
● When “Traction Battery Heater” is operating during charging, th e 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” t ime set.
( P. 157)
● “Traction Battery Heater” can be turned on and off in the “Vehicle Settings”
settings on the multi-information display. ( P. 741)
● “Traction Battery Heater” may operate even when the hybrid batt ery (trac-
tion battery) is fully charged depending on the temperature of the hybrid bat-
tery (traction battery).
• The remaining charge of the hybrid battery (traction battery) decreases
when “Traction Battery Heater” operates. The charging operation may
start again to charge the hybrid battery (traction battery).
• “Charging Stopped Due to Pulled Charging Connector” may be sho wn
when the charging connector is removed while recharging. ( P. 185)

PRIUS PRIME_OM_OM47C77U_(U)
1432-2. Charging
2
Plug-in hybrid system
■Capacity reduction of the hybr id battery (traction battery)
The capacity of the hybrid battery (traction battery) will decline gradually
when the hybrid battery (traction battery) is in use. The rate at which it
declines will differ in accordance with environmental condition s and the way
in which the vehicle is used. Observing the following can help suppress bat-
tery capacity decline.
● Avoid parking the vehicle in areas with a high temperature unde r direct sun-
light when the hybrid battery (traction battery) is fully charged.
● Avoid accelerating and decelerating frequently and suddenly when EV driv-
ing.
● Avoid frequent driving near the top speed for EV driving. ( P. 95)
● Leave a low level of charge in the hybrid battery (traction bat tery) when
leaving the vehicle undriven for a long period of time.
After confirming that EV mode has switched to HV mode, turn the power
switch off.
● Use the charging timer function as much as possible in order to fully
charge the hybrid battery (traction battery) immediately before starting
off. ( P. 157)
Also, if the hybrid battery (traction battery) capacity reduces , the distance that
can be driven in EV mode decreases. However, vehicle performanc e does
not significantly become worse.
■ When the remaining charge of the hybrid battery (traction battery) is low
after charging
In the following situations, the remaining charge of the hybrid battery (traction
battery) after charging completes may be less than normal in or der to protect
the system (the EV driving range after the battery is fully charged may be
shorter).
*
● Charging is carried out when the outside temperature is low or high
● Charging is carried out immediately after high-load driving or in extreme
heat
When none of the above situations apply and there is a drastic drop in the
remaining charge of the hybrid battery (traction battery) after charging com-
pletes, have the vehicle inspected by your Toyota dealer.
*: When this occurs, even if the remaining charge display of the hybrid battery
(traction battery) shows that it is fully charged, the remainin g charge rapidly
decreases faster than normal.
■ When the charging amount sent to the hybrid battery (traction battery)
decreases
When the amount of power supplied by the charging equipment is low or
operation of the “Traction Battery Heater”, etc., reduces the c harging power
sent to the hybrid battery (traction battery), the charging amo unt sent to the
hybrid battery (traction battery) may decrease.

PRIUS PRIME_OM_OM47C77U_(U)
1832-2. Charging
2
Plug-in hybrid system
Charging starts, even though charge schedule is registered
“Charge Now” is set to “On”When charging according to the timer, set
“Charge Now” to “Off”. ( P. 166, 175)
Charge schedule is set to
“Off”Check that charge schedule is not set to
“Off”. (P. 164, 174)
Charging mode is set to
“Departure” and schedule
departure time is close to
current timeWhen the system determines that there is
no time to finish charging by the set sched-
uled departure time, it starts charging.
Check the charge schedules.
Charging cable was
removed and reinserted
while charging indicator was
flashingIf the charging cable is removed and rein-
serted while the charging indicator is flashing,
the charging timer is canceled ( P. 1 4 9 ) .
Temporarily remove the charging cable, and
then reconnect it.
The Remote Air Conditioning
System was operated
When the Remote Air Conditioning System
is operated, the system will start charging,
even if the charge schedule is registered. To
carry out charging using the timer, stop the
Remote Air Conditioning System, and then
reconnect the charging cable.
“Traction Battery Heater”
(  P. 135) operated
When the charging mode is set to “Depar-
ture”, “Traction Battery Heater” may operate
before charging starts. Check the status of
the charging indicator. ( P. 114)
Outside temperature is low
and hybrid battery (traction
battery) warming control
( P. 136) operated
(Alaska and Canada only)When hybrid battery (traction battery)
warming control operates, the timer settings
are ignored and charging starts. In order to
protect the hybrid battery (traction battery),
allow charging to continue.
Likely causeCorrection procedure

PRIUS PRIME_OM_OM47C77U_(U)
1852-2. Charging
2
Plug-in hybrid system
When the hybrid system is started
after charging, a message is dis-
played in the multi-information dis-
play.
When this occurs, follow the
instructions displayed on the
screen.
When charging-related message is displayed
Likely causeCorrection procedure
If “Charging Stopped Due to Pulled Charging Connector” is shown
Charging connector is
removed while charging
When the charging connector is removed
while charging, charging stops. If you want
to fully charge the hybrid battery (traction
battery), reconnect the charging connector.
After the hybrid battery (trac-
tion battery) is fully charged,
the charging connector is
removed while the hybrid
battery (traction battery) is
being recharged again
because electricity-consum-
ing functions
* have been
used and the remaining
charge is now reduced.
*: Electricity is consumed
when operating “Traction
Battery Heater” (P. 135),
the air conditioning-linked
function ( P. 157) or
Remote Air Conditioning
System ( P. 522).

PRIUS PRIME_OM_OM47C77U_(U)
4875-5. Using the driving support systems
5
Driving
WARNING
●Do not use the system in the following situations, as the syste m may be
unable to correctly assist you in reaching the target parking s pot and may
lead to an unexpected accident.
• In an area that is not a parking lot
• A parking lot that is not paved and has no parking space lines , such as
a sand or gravel parking lot
• A parking lot that has a slope or undulations in the road
• A frozen, snow-covered or slippery road
• The asphalt is melting due to hot weather
• There is an obstacle between the vehicle and the target parking spot
• Using tire chains
● Do not use tire other than that provided by the manufacturer. T he system
may not operate properly. When replacing tires, contact your Toyota
dealer.
● The system may not be able position the vehicle in the set location in the
following situations.
• The tires are extremely worn or the tire pressure is low
• The vehicle is carrying very heavy load
• The vehicle is tilted due to having luggage, etc. located on one side of
the vehicle
• There are road heaters installed in the parking lot to prevent the road
surface from freezing.
In any other situations when the set position and vehicle position greatly
differ, have the vehicle inspected by your Toyota dealer.
● Make sure to observe the following precautions regarding the exit parallel
parking assist mode.
Exit parallel parking assist mode is a function used when depar ting from a
parallel parking spot. However, this function may not be usable if obsta-
cles or people are detected in front of the vehicle. Only use this function
when departing from a parallel parking spot. In the event that the steering
control operates, either turn the system off using the S-APGS s witch or
operate the steering wheel to stop the control.
● If exit parallel parking assist mode is mistakenly used in the following situ-
ations, the vehicle may make contact with an obstacle.
The departure function is operated in a direction where an obstacle is
present, but the obstacle is not detected by the side sensors ( situations
such as when the vehicle is directly beside a pole).

499
PRIUS PRIME_OM_OM47C77U_(U)
6Interior features
6-1. Using the air conditioning system and defogger
Automatic air conditioning system (vehicles with
7-inch display) ................. 500
Automatic air conditioning system (vehicles with
11.6-inch display) ............ 511
Remote Air Conditioning System ............................ 522
Heated steering wheel/ seat heaters .................... 526 6-2. Using the interior lights
Interior lights list ................ 528• Front interior light .......... 529
• Front personal lights ..... 529
• Rear interior light .......... 530
6-3. Using the storage features List of storage features ..... 531• Glove box...................... 532
• Console box .................. 532
• Cup holders .................. 533
• Bottle holders/door pockets ................. 534
• Auxiliary boxes.............. 535
• Seat back pockets ........ 535
Luggage compartment features ........................... 536
6-4. Using the other interior features
Other interior features ....... 540 • Sun visors ..................... 540
• Vanity mirrors................ 540
• Power outlets ................ 541
• USB charging ports....... 542
• Wireless charger ........... 544
• Armrest ......................... 553
• Coat hooks.................... 553
• Assist grips ................... 554
Garage door opener.......... 555

5066-1. Using the air conditioning system and defogger
PRIUS PRIME_OM_OM47C77U_(U)
■Heating
●In HV mode, the gasoline engine may operate in order to extract heat from
the engine coolant via the heater.
● 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 heat
exchanger by operating the Remote Air Conditioning System befor e driv-
ing ( P. 522). When frosted over, the heating operation of the Remote
Air Conditioning System starts after defrosting.
• When is turned on, the heating is controlled optimally. Therefore, the set heating performance may not be achieved even if the fan speed
setting is increased.
● 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 approximately 14°F (-10°C) or low
• is operating
■ 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.
■ Water droplets during air conditioning operation• 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.
The outside heat exchanger, accumulator
and air conditioning piping may incur con-
densation or frost may form. During or
after the air conditioning operation, water
droplets may fall from the vehicle. How-
ever, it is not a malfunction.
Outside heat exchanger
Outside heat exchanger
Accumulator

PRIUS PRIME_OM_OM47C77U_(U)
5176-1. Using the air conditioning system and defogger
6
Interior features
■Heating
●In HV mode, the gasoline engine may operate in order to extract heat from
the engine coolant via the heater.
● 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 of the outside heat exchanger, the heating perfor-
mance will decline. The frost can be removed from the outside heat
exchanger by operating the Remote Air Conditioning System befor e driv-
ing ( P. 522). 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.
● 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 approximately 14°F (-10°C) or low
• is operating
■ 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.
■ Water droplets during air conditioning operation• 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.
The outside heat exchanger, accumulator
and air conditioning piping may incur con-
densation or frost may form. During or
after the air conditioning operation, water
droplets may fall from the vehicle. How-
ever, it is not a malfunction.
Outside heat exchanger
Outside heat exchanger
Accumulator