2022 TOYOTA PRIUS PRIME radiator cap

598
PRIUS PRIME_OM_OM47E74U_(U)
7-3. Do-it-yourself maintenance
Engine compartment
IO73PH112
Engine coolant reservoir ( P. 602)
Fuse boxes ( P. 647)
Engine oil level dipstick ( P. 599)
Engine oil filler cap ( P. 600)
Brake fluid reservoir ( P. 608) Washer fluid tank (
P. 610)
12-volt battery ( P. 605)
Power control unit coolant
reservoir ( P. 602)
Radiator ( P. 604)
Condenser ( P. 604)
Electric cooling fans1
2
3
4
5
6
7
8
9
10
11

PRIUS PRIME_OM_OM47E74U_(U)
6037-3. Do-it-yourself maintenance
7
Maintenance and care
■Coolant selection
Only use “Toyota Super Long Life Coolant” or a similar high quality ethylene
glycol based non-silicate, non-amine, non-nitrite, and non-bora te coolant with
long-life hybrid organic acid technology.
U.S.A.:
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deion-
ized water. (Minimum temperature: -31 F [-35 C])
Canada:
“Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45% deion-
ized water. (Minimum temperature: -44 F [-42 C])
For more details about coolant, contact your Toyota dealer.
■ If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine/power control unit c oolant reservoir
caps, drain cock and water pump.
If you cannot find a leak, have your Toyota dealer test the cap and check for
leaks in the cooling system.
WARNING
■ When the hybrid system is hot
Do not remove the engine/power control unit coolant reservoir c aps.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE
■ When adding coolant
Coolant is neither plain water nor straight antifreeze. The cor rect mixture of
water and antifreeze must be used to provide proper lubrication, corrosion
protection and cooling. Be sure to read the antifreeze or coolant label.
■ If you spill coolant
Be sure to wash it off with water to prevent it from damaging p arts or paint.

794Alphabetical index
PRIUS PRIME_OM_OM47E74U_(U)
P position switch ..................... 340
Panic mode .............................. 275
Parking assist sensors Intuitive parking assist .......... 441
Parking Support Brake function ............................... 452
S-APGS (Simple Advanced Parking Guidance
System) .............................. 462
Parking brake ........................... 346 Operation .............................. 346
Parking brake engaged
warning buzzer ................... 346
Parking lights ........................... 347
Light switch ........................... 347
Replacing light bulbs............. 657
Parking lock ............................. 340
Parking Support Brake
function .................................. 452
PCS (Pre-Collision System) .... 379
Enabling/disabling the system ......... ....................... 383
Function ................................ 379
Warning light ......................... 672
Personal lights ......................... 537 Switch ................................... 538
Wattage ................................ 734
Plug-in hybrid system ............... 86 Driving tips ............................ 106
EV auto mode ......................... 87
EV driving range ................... 109
EV mode ................................. 87
EV/HV mode selection switch ................................... 90
Features.................................. 86
How to charge....................... 147
HV mode ................................. 87
Hybrid battery (traction battery) charge mode ........... 87 Power control unit coolant ..... 602
Capacity................................ 731
Checking............................... 602
Preparing and checking before winter ...................... 502
Radiator ................................ 604
Power outlets ........................... 550
Power sources ......................... 132
Power steering (Electric Power Steering)..................... 497 Function ................................ 497
Warning light......................... 672
Power switch ........................... 332 Auto power off function ......... 334
Changing the power
switch modes ..................... 334
If your vehicle has to be
stopped in an emergency ... 661
Starting the hybrid system .... 332
Power windows ....................... 309
Catch protection function ...... 310
Door lock linked window operation ............................ 310
Jam protection function ........ 310
Operation .............................. 309
Window lock switch .............. 309
Pre-Collision System (PCS).... 379
Enabling/disabling the system .......... ...................... 383
Function ................................ 379
Warning light......................... 672
P

795Alphabetical index
PRIUS PRIME_OM_OM47E74U_(U)
Radar cruise controlDynamic radar cruise control with full-speed range .......... 409
Radiator .................................... 604
Radio
*
RCTA (Rear Cross Traffic Alert) ....................................... 435 Blind Spot Monitor function ............................... 432
Rear Cross Traffic Alert function ............................... 435
Rear Cross Traffic Alert
(RCTA) .................................... 435 Blind Spot Monitor function ............................... 432
Rear Cross Traffic Alert function ............................... 435
Rear passengers’ seat belt
reminder light ........................ 674
Rear seat .................................. 298
Rear seat reminder function ... 284
Rear side marker lights ........... 347 Light switch ........................... 347
Replacing light bulbs............. 657
Rear turn signal lights............. 345 Replacing light bulbs............. 657
Turn signal lever ................... 345
Rear view mirror Inside rear view mirror .......... 305
Outside rear view mirrors...... 307
Rear view monitor system
*
Rear window defogger .... 512, 523
Refueling .................................. 365 Capacity ................................ 728
Fuel types ............................. 728
Opening the fuel tank cap ..... 367
When the fuel filler door cannot be opened............... 368
Regenerative braking ................ 95
Remote Air Conditioning System ................................... 531 Replacing
Electronic key battery ........... 644
Fuses .................................... 647
Light bulbs ............................ 652
Tires...................................... 626
Wiper insert .......................... 641
Reporting safety defects for U.S. owners...................... 764
Resetting the message
indicating maintenance is
required.................................. 586
Road accident cautions .......... 103
Road Sign Assist (RSA) .......... 405
RSA (Road Sign Assist) ......... 405
S-APGS (Simple Advanced Parking Guidance
System) .................................. 462
S-FLOW (Front seat concentrated airflow
mode) ............................. 510, 522
Safety Connect .......................... 76
Seat back pockets ................... 544
Seat belts ................................... 30 Adjusting the seat belt ............ 31
Automatic Locking Retractor (ALR) .................... 31
Child restra int system
installation ............................ 64
Cleaning and maintaining the seat belt........................ 582
Emergency Locking
Retractor (ELR) .................... 31
How to wear your seat belt ..... 30
How your child should wear
the seat belt.......................... 32
Pregnant women, proper seat belt use ......................... 33
Reminder light and buzzer.... 674
Seat belt extender .................. 32
R
S
*: Refer to “NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.