2022 TOYOTA PRIUS coolant temperature

6537-2. Steps to take in an emergency
PRIUS_OM_OM47F01U_(U)
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When trouble arises
The coolant level is satisfactory if it is between the “MAX” and
“MIN” lines on the reservoir.
Reservoir
“MAX” line
“MIN” line
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and turn the air conditioning system on to
check that the radiator cooling fans operate and to check for
coolant leaks from t he radiator or hoses.
The fans operate when the air conditioning system is turned on immedi-
ately after a cold start. Confirm that the fans are operating b y checking
the fan sound and air flow. If it is difficult to check these, turn the air con-
ditioning system on and off repeatedly. (The fans may not operate in
freezing temperatures.)
If the fans are not operating:
Stop the hybrid system immediately and contact your Toyota
dealer.
If the fans are operating:
Have the vehicle inspected at the neare st Toyota dealer.
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6557-2. Steps to take in an emergency
PRIUS_OM_OM47F01U_(U)
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When trouble arises
After stopping the hybrid system and waiting for 5 minutes or
more, start the hybrid system again and check if “Hybrid System
Overheated” is shown on the multi-information display.
If the message d oes not disappear:
Stop the hybrid system and contact your Toyota dealer.
If the message is not displayed:
The hybrid system temperature has dropped and the vehicle may
be driven normally.
However, if the message appears again frequently, contact your Toyota
dealer.
WARNING
■ To prevent an accident or injury when inspecting under the hood of
your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
● If steam is seen coming from under the hood, do not open the ho od until
the steam has subsided. The engine compartment may be very hot.
● After the hybrid system has been turned off, check that the “Ac cessory”,
“Ignition ON” or mileage display ( P. 116) on the main display and the
“READY” indicator are off.
When the hybrid system is operating, the gasoline engine may au tomati-
cally start, or the cooling fans may suddenly operate even if the gasoline
engine stops. Do not touch or approach rotating parts such as the fan,
which may lead to fingers or clothing (especially a tie, a scarf or a muffler)
getting caught, resulting in serious injury.
● Do not loosen the coolant reservoir caps while the hybrid syste m and radi-
ator are hot.
High temperature steam or coolant could spray out.
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726Alphabetical index
PRIUS_OM_OM47F01U_(U)
Front turn signal lights ........... 255Replacing light bulbs............. 572
Turn signal lever ................... 255
Fuel ........................................... 671 Capacity ................................ 663
Fuel gauge ............................ 116
Information ............................ 671
Refueling............................... 277
Type ...................................... 663
Warning light ......................... 590
Fuel consumption............ 133, 168
Fuel filler door.......................... 277
Opener .................................. 279
Refueling............................... 277
When the fuel filler door cannot be opened............... 280
Fuses ........................................ 558
Garage door opener ................ 482
Glove box ................................. 456
Hands-free system (for
cellular phone)
*
Head restraints ........................ 203
Head-up display ....................... 158
Headlights ................................ 257 AHB (Automatic High Beam) ................................. 262
Headlight aim ................ 561, 713
Light switch ........................... 257
Replacing light bulbs............. 572
Heated steering wheel............. 450
Heaters Automatic air conditioning
system ....... ................. 430, 440
Heated steering wheel .......... 450
Outside rear view mirrors ........................ 434, 444
Seat heaters ......................... 450 High coolant temperature
warning light.......................... 590
High mounted stoplight Replacing.............................. 572
High-voltage components ........ 89
Hill-start assist control ........... 416
Hood ......................................... 511
Hooks
Cargo hooks ......................... 462
Coat hooks ........................... 480
Grocery bag hook ................. 463
Retaining hooks (floor mat) .... 26
Horn .......................................... 206
Hybrid battery (tr action battery)
Air intake vent ......................... 90
Location .................................. 89
Specification ......................... 663
Hybrid battery (traction battery) air intake vent............ 90 Cleaning ............................... 546
Hybrid system............................ 84 Brake Override System ........ 223
Drive-Start Control ................ 224
Emergency shut off system .... 90
Energy monitor/consumption
screen ................ 127, 165, 170
EV drive mode ...................... 246
High voltage components ....... 89
Hybrid System Indicator ....... 129
Hybrid system precautions ..... 89
Hybrid vehicle driving tips ..... 422
If the hybrid system will not start .................................... 641
Overheating .......................... 652
Power switch ........................ 239
Regenerative braking ............. 87
Starting the hybrid system .... 239
Vehicle proximity notification system .......... ..................... ... 85
Hybrid System Indicator ......... 129
Hybrid transmission................ 249
G
H

735Alphabetical index
PRIUS_OM_OM47F01U_(U)
Warning lights.......................... 107ABS....................................... 589
Brake Override System......... 592
Brake system ....... ................. 588
Charging system ................... 588
Drive-Start Control ................ 592
Driver’s seat belt reminder light ..................................... 591
Electronic engine control system ......... ....................... 588
Electric power steering
system ......... ....................... 589
Front passenger’s seat belt reminder light...................... 591
High coolant temperature ..... 590
Low engine oil pressure ........ 588
Low fuel level ........................ 590
Malfunction indicator lamp .... 588
Master warning light.............. 591
Open door ............................. 590
Parking Support Brake function ............................... 592
PCS ...................................... 589
PKSB OFF indicator ............. 590
Rear passengers’ seat belt
reminder light...................... 591
Seat belt reminder light ......... 591
Slip indicator ......................... 590
SRS ...................................... 589
Tire pressure......................... 591 Warning messages.................. 599
Warning reflector storage
space ...................................... 464
Washer ............................. 269, 275 Checking............................... 526
Preparing and checking
before winter ...................... 425
Switch ........................... 269, 275
Washing and waxing ............... 492
Water-repellent coating .......... 493
Weights .................................... 660 Cargo capacity...................... 236
Load limits ............................ 660
Wheels ...................................... 540
Replacing wheels ................. 627
Size....................................... 668
Window glasses ...................... 212
Window lock switch ................ 212
Windows Power windows..................... 212
Rear window
defogger ..................... 434, 444
Washer ......................... 269, 275
Windshield wipers ................... 269 Handling the wiper arms ....... 497
Rain-sensing windshield wipers ................................. 271
Replacing the wiper insert .... 551
Winter driving tips ................... 425
Wiper insert replacement ....... 551
Wireless charger ..................... 471
Wireless remote control ......... 176 Battery-Saving Function ....... 194
Locking/Unlocking ................ 182
Panic mode........................... 177
Replacing the battery............ 555
WMA disc
*1
*1: Refer to “MULTIMEDIA OWNER’S MANUAL”.
*2: Refer to “NAVIGATION S YSTEM OWNER’S MANUAL”.