2023 TOYOTA PRIUS heating

4665-1. Using the air conditioning system and defogger
PRIUS_OM_OM47F32E_(EE)■Operation of the air conditioning system when the blower customization
is set to “ECO”
●In the “ECO” mode, the air conditioning system is controlled as follows to
prioritize fuel efficiency:
• Engine speed and compressor operation controlled to restrict heating/
cooling capacity
• Fan speed restricted when automatic mode is selected
●To improve air conditioning performance, perform the following operations:
• Adjust the fan speed
• Adjust the temperature setting
• Set the blower customization to “FAST” or “NORMAL” mode.
●When the driving mode is set to Eco driving mode, the fan speed setting
mode will be changed to “ECO” mode automatically. Even in this case, the
fan speed control mode can be changed by pressing . (P. 351)
■When the outside temperature falls to nearly 0C (32F)
The dehumidification function may not operate even when is pressed.
■Ventilation and air conditioning odors
●To let the fresh air in, set the air conditioning system to the outside air mode.
●During use, various odors from inside and outside the vehicle may enter into
and accumulate in the air conditioning system. This may then cause odor to
be emitted from the vents.
●In order to suppress odors that occur when the air conditioning system
starts, fresh air is automatically taken in when parked.
●To reduce potential odors from occurring, the start timing of the blower may
be delayed for a short period of time immediately after the air conditioning
system is started in automatic mode.
■Air conditioning filter
P. 542
■Customization
Settings (e.g. outside/recirculated air mode) can be changed.
(Customizable features: P. 670)

4675-1. Using the air conditioning system and defogger
PRIUS_OM_OM47F32E_(EE)
5
Interior features
WARNING
■To prevent the windshield from fogging up
● Do not use during cool air operation in extremely humid weather.
The difference between the temperature of the outside air and that of the
windshield can cause the outer surface of the windshield to fog up, block-
ing your vision.
■ To prevent burns
Do not touch the rear view mirror surfaces when the outside rear view mirror
defoggers are on.
NOTICE
■ To prevent 12-volt battery discharge
Do not leave the air conditioning syst em on longer than necessary when the
hybrid system is off.
■ Air outlets
The air outlets become hot when used for heating. Therefore, use caution
and adjust the air outlets accordingly.
● Do not place anything on the instrument
panel which may cover the air outlets.
Otherwise, air flow may be obstructed,
preventing the windshield defoggers
from defogging.

4685-1. Using the air conditioning system and defogger
PRIUS_OM_OM47F32E_(EE)
Seat heaters
: If equipped
Seat heaters heat the front seats.
WARNING
●Care should be taken to prevent injury if anyone in the following categories
comes in contact with the seats when the heater is on:
• Babies, small children, the elderly, the sick and the physically chal-
lenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping
drugs, cold remedies, etc.)
● Observe the following precautions to prevent minor burns or overheating:
• Do not cover the seat with a blanket or cushion when using the seat
heater.
• Do not use seat heater more than necessary.
NOTICE
● Do not put heavy objects that have an uneven surface on the seat and do
not stick sharp objects (needles, nails, etc.) into the seat.
● To prevent 12-volt battery discharge, do not use the functions when the
hybrid system is off.

6457-2. Steps to take in an emergency
PRIUS_OM_OM47F32E_(EE)
7
When trouble arises
If your vehicle overheats
■If the high coolant temperature warning light comes on or
flashes
Stop the vehicle in a safe place and turn off the air conditioning
system, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has cooled down sufficiently, inspect the
hoses and radiator core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact
any authorized Toyota retailer
or Toyota authorized repairer,
or any reliable repairer.
The following may indicate that your vehicle is overheating.
● The high coolant temperature warning light (P. 583) comes on
or flashes, or a loss of hybrid system power is experienced. (For
example, the vehicle speed does not increase.)
● “Hybrid System Overheated” is shown on the multi-information
display.
● Steam comes out from under the hood.
Correction procedures
1
2
3
1
2

688Alphabetical index
PRIUS_OM_OM47F32E_(EE)
Care ................................... 496, 502
Aluminum wheels .................. 497
Exterior.................................. 496
Front camera......................... 285
Interior ................................... 502
Radar sensor ........................ 284
Seat belts .............................. 503
Water-repellent coating ......... 497
Cargo hooks ............................. 480
Catch protection function ....... 211
Chains ....................................... 453
Child restraint system ............... 54
Child restraint system
installation method................ 67
Fixed with a seat belt .............. 68
Fixed with an ISOFIX lower
anchorage............................. 70
Points to remember................. 54
Riding with children ................. 53
Using a top tether
anchorage............................. 72
Child safety ................................ 53
12-volt battery precautions.... 524
Airbag precautions .................. 41
Back door precautions .......... 184
Child restraint system ............. 54
How your child should wear
the seat belt .......................... 36
Installing child restraints.......... 67
Moon roof precautions .......... 218
Power window lock switch .... 210
Power window precautions ... 213
Rear door child-protectors .... 180
Removed key battery
precautions ......................... 556
Riding with children ................. 53
Seat belt precautions .............. 69
Seat heater precautions ........ 468Child-protectors....................... 180
Cleaning ........................... 496, 502
Aluminum wheels.................. 497
Exterior ................................. 496
Front camera ........................ 285
Hybrid battery (traction
battery) air intake vent ........ 545
Interior................................... 502
Radar sensor ........................ 284
Seat belts .............................. 503
Water-repellent coating......... 497
Clock ......................................... 100
Adjustment ............................ 106
Coat hooks ............................... 493
Combination meter .................. 100
Clock adjustment .................. 106
Main display .......................... 117
Multi-information display ....... 127
Warning lights and
indicators ............................ 110
Condenser ................................ 520
Console box ............................. 474
Coolant ..................................... 518
Capacity ................................ 662
Checking ............................... 518
Preparing and checking
before winter....................... 452
Cooling system ........................ 518
Engine overheating ............... 645
Hybrid system overheating ... 647
Consumption screen ............... 166
Cruise control
Cruise control........................ 346
Dynamic radar cruise control
with full-speed range .......... 329
Cup holders.............................. 475
Curtain shield airbags ............... 39
Customizable features ............ 670
C

690Alphabetical index
PRIUS_OM_OM47F32E_(EE)
ECB (Electronically
Controlled Brake System) .... 441
Eco drive mode ........................ 351
Electric motor (traction motor)
Location .................................. 79
Specification.......................... 657
Electric Power Steering
(EPS) ....................................... 442
Function ................................ 442
Warning light ......................... 581
Electronic key .......................... 172
Battery-saving function ......... 189
If the electronic key does not
operate properly ................. 636
Replacing the battery ............ 554
Electronically Controlled
Brake System (ECB).............. 441
Emergency brake signal ......... 442
Emergency flashers................. 568
Emergency brake signal ....... 442
Emergency tire puncture
repair kit ................................. 602
Emergency, in case of
If a warning buzzer sounds ... 580
If a warning light turns on ...... 580
If a warning message is
displayed ............................ 589
If the 12-volt battery is
discharged .......................... 639
If the electronic key does not
operate properly ................. 636
If the hybrid system will not
start..................................... 634
If the vehicle becomes
stuck ................................... 650
If the vehicle is submerged or
water on the road is
rising ................................... 570If you have a flat tire ..... 598, 618
If you lose your keys ..... 173, 176
If you think something is
wrong.................................. 579
If your vehicle has to be
stopped in an emergency ... 569
If your vehicle needs to be
towed .................................. 572
If your vehicle overheats ....... 645
Energy monitor ................ 130, 166
Engine....................................... 656
Accessory mode ................... 246
Compartment ........................ 514
Engine switch (power
switch) ................................ 244
Exhaust gas precautions ........ 50
Hood ..................................... 511
How to start the hybrid
system ................................ 244
Identification number ............ 656
If the hybrid system will not
start .................................... 634
If your vehicle has to be
stopped in an emergency ... 569
Ignition switch (power
switch) ................................ 244
Overheating .......................... 645
Power switch......................... 244
Engine coolant ......................... 518
Capacity ................................ 662
Checking ............................... 518
Preparing and checking
before winter....................... 452
E

692Alphabetical index
PRIUS_OM_OM47F32E_(EE)
Fuel ........................................... 668
Capacity ................................ 657
Fuel gauge .................... 118, 120
Information ............................ 668
Refueling ............................... 277
Type ...................................... 657
Warning light ......................... 583
Fuel consumption ............ 136, 169
Fuel filler door .......................... 279
Opener .................................. 279
Refueling ............................... 277
When the fuel filler door
cannot be opened ............... 280
Fuses ........................................ 557
Glove box ................................. 474
Hands-free system (for
cellular phone)
*
Head restraints......................... 199
Head-up display ....................... 160
Headlights ................................ 261
AHB (Automatic High
Beam) ................................. 266
Automatic headlight
leveling ............................... 264
Extended Headlight
Lighting system................... 263
Light switch ........................... 261
Replacing light bulbs ............. 565
Heaters
Automatic air conditioning
system ................................ 458
Outside rear view mirrors ...... 463
Seat heaters.......................... 468
High coolant temperature
warning light .......................... 583
High mounted stoplight
Replacing .............................. 565High-voltage components ........ 84
Hill-start assist control............ 442
Hood ......................................... 511
Hooks
Cargo hooks ......................... 480
Coat hooks............................ 493
Grocery bag hook ................. 481
Retaining hooks (floor mat)..... 30
Horn .......................................... 203
Hybrid battery (traction battery)
Air intake vent ......................... 85
Location .................................. 84
Specification ......................... 657
Hybrid battery (traction
battery) air intake vent ............ 85
Cleaning................................ 545
Hybrid system ............................ 79
Brake Override System......... 221
Drive-Start Control ................ 222
Emergency shut off system .... 85
Energy monitor/consumption
screen......................... 130, 166
EV drive mode ...................... 250
High voltage components ....... 84
Hybrid System Indicator........ 132
Hybrid system precautions ..... 84
Hybrid vehicle driving tips ..... 449
If the hybrid system will not
start .................................... 634
Overheating .......................... 645
Power switch......................... 244
Regenerative braking.............. 81
Starting the hybrid system .... 244
Vehicle proximity notification
system .................................. 80
Hybrid System Indicator ......... 132
Hybrid transmission ................ 253
G
H

695Alphabetical index
PRIUS_OM_OM47F32E_(EE)
Multi-information display ........ 127
Air conditioning system
settings screen ................... 148
Audio system-linked
display ................................ 147
Display contents.................... 127
Drive information ................... 129
Driving assist system
information .......................... 152
Dynamic radar cruise control
with full-speed range .......... 329
Energy monitor...................... 130
Language .............................. 156
LTA (Lane Tracing Assist) .... 316
Parking Support Brake
function ............................... 400
Pre-collision warning ............. 297
RCTA detection screen ......... 356
RSA (Road Sign Assist) ........ 324
S-IPA (Simple Intelligent
Parking Assist System)....... 409
Settings display ..................... 153
Toyota parking
assist-sensor ...................... 382
Warning message display ..... 152
Multimedia system
*
Navigation system*
Odometer.................................. 121
Oil
Engine oil .............................. 658
Opener
Back door.............................. 182
Fuel filler door ....................... 279
Hood ..................................... 511
Outside rear view mirrors ....... 207
Adjustment ............................ 207
BSM (Blind Spot Monitor) ..... 356
Folding .................................. 207
Outside rear view mirror
defoggers ........................... 463
Outside temperature
display ............................ 118, 120
Overhead console ................... 477
Overheating.............................. 645
N
O
*: Refer to “Navigation and multimedia system Owner’s manual”.