2018 TOYOTA PRIUS heating

536
PRIUS_OM_OM47B89U_(U)
6-1. Using the air conditioning system and defogger
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.

735
PRIUS_OM_OM47B89U_(U)
8
When trouble arises
8-2. Steps to take in an emergency
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
your Toyota dealer.
The following may indicate that your vehicle is overheating.
● The high coolant temperature warning light ( →P. 675) comes on
or flashes, or a loss of hybrid system power is experienced. (For
example, the vehicle s peed does not increase.)
● “Hybrid System Overhe ated” is shown on the multi-information
display.
● Steam comes out from under the hood.
Correction procedures
1
2
3
1
2

805Alphabetical index
PRIUS_OM_OM47B89U_(U)
CleaningAluminum wheels.................. 583
Camera sensor ..................... 277
Exterior ................................. 582
Hybrid battery (traction
battery) air intake vent ........ 637
Interior................................... 588
Radar sensor ........................ 276
Seat belts .............................. 589
Water-repellent coating......... 583
Coat hooks ............................... 565
Combination meter .................... 92
Clock adjustment .................... 97
Main display .......................... 107
Multi-information display ....... 114
Warning lights and indicators ............................ 100
Condenser ................................ 610
Console box ............................. 542
Coolant Capacity ................................ 750
Checking ............................... 608
Preparing and checking before winter....................... 418
Cooling system ........................ 608 Hybrid system overheating......................... 735
Consumption screen ....... 153, 158
Cruise control Cruise control........................ 319
Dynamic radar cruise
control with full-speed
range .................................. 304
Cup holders.............................. 543
Curtain shield airbags ............... 36
Customizable features ............ 770 Daytime running light
system.................................... 251
Deck board ............................... 546
Defogger Outside rear view
mirrors ........................ 520, 530
Rear window ................. 520, 530
Windshield .................... 520, 530
Dimension ................................ 744
Dinghy towing.......................... 230
Display BSM (Blind Spot Monitor) ..... 326
Drive information .................. 116
Dynamic radar cruise control with full-speed range .......... 304
Energy monitor ..... 117, 153, 158
Head-up display.................... 146
LDA (Lane Departure Alert with steering control) .......... 298
Multi-information display ....... 114
Parking assist
system ....... ................. 340, 367
Pre-collision warning ............ 281
Trip information..................... 109
Warning messages ............... 684
Do-it-yourself maintenance .... 598
Door courtesy lights ............... 538 Location ................................ 538
Wattage ................................ 754D

807Alphabetical index
PRIUS_OM_OM47B89U_(U)
EngineAccessory mode ................... 233
Compartment ........................ 604
Engine switch........................ 231
Exhaust gas precautions ........ 56
Hood ..................................... 601
How to start the hybrid system ......... ....................... 231
Identification number ............ 746
If the hybrid system will not start .............................. 724
If your vehicle has to be stopped in an
emergency.......................... 665
Ignition switch (power switch) .................... 231
Overheating .......................... 735
Power switch......................... 231
Engine coolant Capacity ................................ 750
Checking ............................... 608
Preparing and checking before winter....................... 418
Engine oil Capacity ................................ 748
Checking ............................... 605
Oil pressure warning light ..... 673
Preparing and checking before winter....................... 418
Engine switch .......................... 231
Auto power off function ......... 233
Changing the power switch modes...................... 233
If your vehicle has to be stopped in an
emergency.......................... 665
Starting the hybrid system .... 231 EPS
(Electronic Power Steering)
Function ................................ 408
Warning light......................... 674
EV indicator ............................. 119
EV drive mode ......................... 237
Event data recorder (EDR) ........................................ 11
Exhaust gas precautions .......... 56
Flat tire ..................................... 691
Floor mats .................................. 26
Fluid Brake .................................... 751
Transmission ........................ 751
Washer ................................. 616
Fog lights Replacing light bulbs ............ 660
Switch ................................... 258
Footwell lights ......................... 538
Front doors .............................. 171
Front fog lights Replacing light bulbs ............ 660
Switch ................................... 258
Front passenger occupant classification system .............. 50
Front passenger’s seat belt reminder light................. 675
Front seats ............................... 190
Adjustment............................ 190
Cleaning ............................... 588
Correct driving posture ........... 28
Head restraints ..................... 195
Seat heaters ......................... 536
Front side marker lights
Light switch ........................... 248
Replacing light bulbs ............ 660
F

808Alphabetical index
PRIUS_OM_OM47B89U_(U)
Front turn signal lightsReplacing light bulbs............. 656
Turn signal lever ................... 246
Wattage ................................ 754
Fuel
Capacity ................................ 747
Fuel gauge ............................ 108
Gas station information ......... 820
Information ............................ 755
Refueling............................... 268
Type ...................................... 747
Warning light ......................... 675
Fuel filler door.......................... 268 Opener .................................. 270
Refueling............................... 268
When the fuel filler door cannot be opened............... 271
Fuses ........................................ 649
Gas station information .......... 820
Garage door opener ................ 567
Glove box ................................. 542
Hands-free system (for cellular phone)................ 474
Head restraints ........................ 195
Head-up display ....................... 146
Headlights ................................ 248 Automatic High Beam system ......... ....................... 253
Headlight aim ................ 652, 794
Light switch ........................... 248
Replacing light bulbs............. 660
Heaters
Automatic air conditioning system ....... ................. 516, 526
Outside rear view
mirrors ........................ 520, 530
Seat heaters ......................... 536 High coolant
temperature
warning light.......................... 675
High mounted stoplight Replacing.............................. 660
Hill-start assist control ........... 409
Hood ......................................... 601
Hooks Cargo hooks ......................... 547
Coat hooks ........................... 565
Grocery bag hook ................. 548
Retaining hooks (floor mat) .... 26
Horn .......................................... 198
Hybrid battery (traction battery) Location .................................. 82
Specification ......................... 747
Hybrid battery (traction battery)
air intake vent .................. 83, 637
Hybrid system............................ 78 Brake Override System ........ 215
Drive-Start Control ................ 216
Emergency shut off system .......... ..................... ... 83
Energy monitor/consumption
screen ................ 117, 153, 158
EV drive mode ...................... 237
High voltage components ....... 82
Hybrid System Indicator ....... 119
Hybrid system precautions ..... 82
Hybrid vehicle driving tips ..... 415
If the hybrid system will not start .............................. 724
Overheating .......................... 735
Power switch ........................ 231
Regenerative braking ............. 80
Starting the hybrid system .... 231
Vehicle proximity notification system................ 79
Hybrid System Indicator ......... 119
Hybrid transmission................ 240
G
H

811Alphabetical index
PRIUS_OM_OM47B89U_(U)
Multi-information displayAir conditioning system
settings screen ................... 134
Audio system-linked display ................................ 133
BSM (Blind Spot Monitor) ..... 326
Display contents ................... 114
Drive information................... 116
Driving assist system information.......................... 138
Dynamic radar cruise control
with full-speed range .......... 304
Energy monitor ..................... 117
Language .............................. 142
LDA (Lane Departure Alert with steering control) .......... 298
Navigation system-linked
display ................................ 133
Parking assist system ... 340, 367
Pre-collision warning............. 281
Settings display..................... 139
Warning message display..... 138
Navigation system
*
Noise from under vehicle............ 8
Odometer.................................. 109
Oil Engine oil .............................. 748
Opener Fuel filler door ....................... 270
Hood ..................................... 601
Outside rear view mirrors ....... 202 Adjustment ............................ 202
Blind Spot Monitor ................ 326
Folding .................................. 202
Outside rear view mirror
defoggers ................... 520, 530 Outside temperature
display.................................... 108
Overhead console ................... 545
Overheating ............................. 735
Overheating, Engine ............... 735
P position switch ..................... 241
Panic mode .............................. 167
Parking assist sensors Intelligent Clearance
Sonar.................................. 350
Intuitive parking assist .......... 339
S-APGS (Simple Advanced Parking Guidance
System) .............................. 363
Parking brake
Operation .............................. 247
Parking brake engaged warning buzzer ................... 247
Parking lights Light switch ........................... 248
Replacing light bulbs .... 656, 660
Wattage ................................ 754
Parking lock ............................. 241
PCS (Pre-Collision System) Enabling/disabling the
system .......... ...................... 285
Function ................................ 281
Warning light......................... 674
Personal lights......................... 538 Switch ................................... 539
Wattage ................................ 754
Power control unit coolant Capacity................................ 750
Checking............................... 608
Preparing and checking before winter ...................... 418
Radiator ................................ 610
N
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*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.