air conditioning TOYOTA PRIUS PRIME 2020 Owners Manual (in English)

TABLE OF CONTENTS4
PRIUS PRIME_OM_OM47C77U_(U)5-5. Using the driving support
systems
Toyota Safety Sense P ..... 373
PCS (Pre-Collision System) ........................... 381
LDA (Lane Departure Alert with steering
control) ............................ 393
Dynamic radar cruise control with full-speed
range ............................... 403
Driving mode select switch .............................. 419
BSM (Blind Spot Monitor) ........ 421
• The Blind Spot Monitor
function ......................... 425
• The Rear Cross Traffic Alert function ................. 428
Intuitive parking assist ....... 433
Parking Support Brake function ........................... 443
S-APGS (Simple Advanced Parking
Guidance System) .......... 455
Driving assist systems....... 489
5-6. Driving tips Winter driving tips.............. 495 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
6Interior features

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1
9 8
7
6 4 3
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PRIUS PRIME_OM_OM47C77U_(U)
10
5
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 7-1. Maintenance and care
Cleaning and protecting the vehicle exterior .......... 564
Cleaning and protecting the vehicle interior ........... 569
7-2. Maintenance Maintenance requirements ................... 575
General maintenance ........ 578
Emission inspection and maintenance (I/M)
programs ......................... 581
7-3. Do-it-yourself maintenance Do-it-yourself service precautions ...................... 582
Hood .................................. 585
Positioning a floor jack....... 587
Engine compartment ......... 588
Tires................................... 602
Tire inflation pressure ........ 611
Wheels............................... 614
Replacing the tire............... 617
Air conditioning filter .......... 628
Wiper insert replacement..................... 632
Electronic key battery ........ 635
Checking and replacing fuses ................................ 638
Headlight aim..................... 641
Light bulbs ......................... 643
7Maintenance and care

19Pictorial index
PRIUS PRIME_OM_OM47C77U_(U)Multi-information display . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 218
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 218
Energy monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 221
When the warning messages are displayed . . . . . . . . . . . . . . P. 672
Parking brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 349
Applying/releasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 349
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . P. 495
Warning buzzer . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . P. 349
Turn signal lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 348
Headlight switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 350
Headlights/parking lights/tail lights/
daytime running lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 350
Fog lights
*1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 360
Windshield wipers and washer switch . . . . . . . . . . . . . . . . P. 362
Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 362
Adding washer fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 600
Emergency flasher switch . . . . . . . . . . . . . . . . . . . . . . . . . . P. 652
Fuel filler door opener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 370
Hood lock release lever. . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 585
Tilt and telescopic steering lock release lever . . . . . . . . . . P. 306
Air conditioning system . . . . . . . . . . . . . . . . . . . . . . . . P. 500, 511
Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 500, 512
Rear window defogger . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 504, 515
Audio system
*2
*1: If equipped
*2: Refer to “NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.
5
6
7
8
9
10
11
12
13
14

86
PRIUS PRIME_OM_OM47C77U_(U)
2-1. Plug-in hybrid system
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 (t raction
battery) becomes low, the vehicle is automatically controlled i n
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 s uch as
vehicle speed, the amount of charge remaining in the hybrid bat tery
(traction battery) and the usage of the air conditioning system. The gaso-
line engine may also be used simultaneously in accordance with driving
conditions.
1
2

PRIUS PRIME_OM_OM47C77U_(U)
912-1. Plug-in hybrid system
2
Plug-in hybrid system
■Switching to the hybrid battery (traction battery) charge mode
Press and hold the switch.
Take your hand off the switch
once the hybrid battery charge
mode indicator starts to blink.
The hybrid battery charge mode
indicator illuminates when the
switch to hybrid battery (traction
battery) charge mode is com-
plete.
When the hybrid battery (traction battery) is fully charged
*, the hybrid
battery (traction battery) charge mode is automatically cancele d and the
operation mode will be switched to HV mode.
The hybrid battery (traction battery) charge mode will be cance led by
pressing EV/HV mode selection switch or EV auto mode switch.
*: The maximum charge amount in the hybrid battery (traction batt ery)
charge mode is approximately 80% of the fully charged capacity for the
charging from an external power source.
■ If the plug-in hybrid system ope ration mode cannot be changed
In the following situations, the plug-in hybrid system operation mode cannot
be changed even if the EV/HV mode selection switch or EV auto mode switch
is pressed. (In this case, the warning message is displayed on the multi-infor-
mation display when the switch is pressed.)
● When electricity needed for EV driving is not remaining (when in EV/EV
auto mode)
● When the traction battery is almost completely charged (hybrid battery [trac-
tion battery] charge mode)
■ When switching from EV mode to another mode using the switch
When the power switch is turned of f, operation mode switching is canceled
and the system returns to EV mode the next time the vehicle is started.
■ Hybrid battery (traction battery) charge mode
●The following may occur to protect the system, etc.
• Cannot switch to hybrid battery (traction battery) charge mode or cannot
cancel it
• Gasoline engine does not start or stops even after switching to hybrid bat- tery (traction battery) charge mode
● If a load to the system is large, such as when the power consumption of the
air conditioning system is large or when the temperature of the engine cool-
ant is high, it may take longer time than usual to charge using the hybrid bat-
tery (traction battery) charge mode, or charging to the hybrid battery
(traction battery) may not be performed.

98
PRIUS PRIME_OM_OM47C77U_(U)
2-1. Plug-in hybrid system
Plug-in hybrid system precautions
The illustration is an example for explanation and may differ from the
actual item.
Take care when handling the hybrid system, as it contains a high
voltage system (about 600V at maximum) as well as parts that
become extremely hot when th e hybrid system is operating.
Obey the caution labels attached to the vehicle.
Caution label
Charging inlet
Service plug
Air conditioning compressor
Power control unit and DC/DC
converter Electric motor (traction motor)
High voltage c
ables (orange)
Battery charger
Hybrid battery (traction bat-
tery)1
2
3
4
5
6
7
8
9

105
PRIUS PRIME_OM_OM47C77U_(U)
2-1. Plug-in hybrid system
2
Plug-in hybrid system
Plug-in hybrid vehicle driving tips
◆Using EV mode and HV mode effectively
Primarily using EV mode when driving in cities and using HV mod e
when driving on highways (or freeways) can help conserve fuel a nd
electricity. ( P. 9 0 )
◆Using Eco drive mode
When using Eco drive mode, the torque corresponding to the acce l-
erator pedal depression amount can be generated more smoothly
than it is in normal conditions. In addition, the operation of the air
conditioning system (heating/coo ling) will be minimized, improving
fuel and electricity economy. ( P. 419)
◆Use of Hybrid System Indicator
Eco-friendly driving is possible by keeping the Hybrid System I ndi-
cator within Eco area. ( P. 223)
◆Shift position operation
Shift the shift position to D when stopped at a traffic light, or driving
in heavy traffic etc. Shift the shift position to P when parkin g. When
using the N, there is no positiv e effect on fuel consumption. In the
N, the gasoline engine operates but electricity cannot be gener -
ated. Also, when using the air conditioning system, etc., the h ybrid
battery (traction batt ery) power is consumed.
For economical and ecological dri ving, pay attention to the fol-
lowing points:

PRIUS PRIME_OM_OM47C77U_(U)
1072-1. Plug-in hybrid system
2
Plug-in hybrid system
◆Air conditioning
●Turn the “A/C” switch (
*1 • *2) off when it is
not needed. Doing so can help reduce excessive electricity and
fuel consumption.
In summer: When the ambient temperature is high, use the recir-
culated air mode. Doing so will help to reduce the burden on th e
air conditioning system and reduc e electricity and fuel consump-
tion as well.
In winter: Avoid excessive and unnecessary use of the heater.
Usage of the heated steering w heel (if equipped) and seat heat-
ers is effective. ( P. 5 2 6 )
● Using the Remote Air Conditioning System ( P. 522) while the
charging cable is connected to the vehicle can reduce electrici ty
consumption immediately after st arting off by operating air condi-
tioning mainly using electricity from an external power source.
● When setting the timer, selecting the start time setting mode a nd
setting “Climate Prep” to “On” c an reduce electricity consumption
immediately after starting off by operating air conditioning be fore
charging is completed. ( P. 157)
*1: Vehicles with 7-inch display
*2: Vehicles with 11.6-inch display
◆Checking tire inflation pressure
Make sure to check the tire inflation pressure frequently. If t here is
improper tire inflation pressur e in the tires, the EV driving range will
become shorter, and fuel consumption when in HV mode will
increase.
Also, as snow tires can cause large amounts of friction, their use on
dry roads can lead t o increased fuel and electricity consumptio n.
◆Luggage
Carrying heavy luggage will lead to poor fuel economy. Avoid carry-
ing unnecessary luggage. Installing a large roof rack will also cause
poor fuel economy.
◆Warming up before driving
Since the gasoline engine starts up and cuts out automatically,
warming up is not necessary.

108
PRIUS PRIME_OM_OM47C77U_(U)
2-1. Plug-in hybrid system
EV driving range
The value displayed on the multi-information display etc. (P. 212,
228, 235, 252) is estimated fro m the following information.
● The amount of hybrid battery (tr action battery) charge currently
remaining
● The electricity consumption (the estimated distance that can be
driven in EV mode per unit of electrical energy) based on the
recorded value
● Past air conditioning system el ectricity consumption amount
The electricity consumption va ries depending on how the vehicle is
driven. The vehicle automatically records the electricity consumption
when being charged and uses the el ectricity consumption for estimat-
ing the EV driving range. Therefor e, the EV driving range displayed
when the hybrid battery (traction battery) is fully charged may differ
from the previous EV driving range depending on how the vehicle was
driven.
The EV driving range may change significantly with each chargin g
until the electricity consumptio n based on the recorded value i s stable
(for approximately the first mont h or two). However, this does not indi-
cate a malfunction.
When the air conditioning system is turned on, the EV driving r ange
(with using the air conditioning system) is estimated based on the past
air conditioning electricity consumption amount considering tha t the
electricity consumpt ion may become higher.
The EV driving range displayed on the multi-information display
etc. shows the reference distan ce that EV driving (driving using
only the electric motor) is possi ble, and the actual distance that
can be driven may differ from that displayed.
Even if the EV driving range is displayed, EV driving may be can-
celed and both gasoline engine a nd electric motor are used depend-
ing on the situation. ( P. 9 5 )
Displayed value

PRIUS PRIME_OM_OM47C77U_(U)
1092-1. Plug-in hybrid system
2
Plug-in hybrid system
The distance that can be driven in EV mode varies significantly
depending on how the vehicle is driven, road conditions, the we ather,
the outside temperature, usage con ditions of electrical components
and the number o f occupants.
The distance that can be driven in EV mode can be extended if t he fol-
lowing is performed:
● Maintain a safe distance from t he vehicle in front and avoid un nec-
essary acceleration and deceleration
● Accelerate and decelerate the v ehicle as smoothly as possible
● Drive at moderate speeds as much as possible and maintain a con -
stant speed
● Set the air conditioning to a moderate temperature and turn the “A/C”
switch (
*1 • *2) off when it is not needed
● Use tires of the specified size and maintain the specified tire pres-
sure
● Use the EV/HV mode selection switch to drive in HV mode when
driving on a highway
Electricity consumption will in crease substantially when drivin g on a
highway in EV mode.
● Do not add unnecessary w eight to the vehicle
*1: Vehicles with 7-inch display
*2: Vehicles with 11.6-inch display
The following indicate that charging has been carried out prope rly.
● The charging indicator turns off
● The Hybrid battery (traction battery) status indicators illumin ate for
approximately 15 seconds. ( P. 112)
● “Charging Complete” is displayed on the multi-information displ ay
when starting off ( P. 140)
Regardless of the type of power source or whether the charging timer
function is used, charging is c ompleted if the above can be confirmed.
Charging-related messages: P. 185
Tips for extending the EV driving range
Display when charging is completed