2019 TOYOTA PRIUS C radiator cap

4207-3. Do-it-yourself maintenance
PRIUS c_U
Engine compartment
Fuse boxes (P. 4 5 2 )
Engine oil filler cap ( P. 4 2 2 )
Engine coolant radiator cap
Power control unit
coolant reservoir ( P. 4 2 4 )
Brake fluid reservoir ( P. 4 2 6 )
Engine coolant reservoir ( P. 4 2 4 ) Engine/power control unit
coolant radiator (
P. 426)
Electric cooling fan
Condenser ( P. 426)
Engine oil level dipstick ( P. 421)
Washer fluid tank ( P. 428)1
2
3
4
5
6
7
8
9
10
11

4257-3. Do-it-yourself maintenance
7
Maintenance and care
PRIUS c_U
■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 an d 50%
deionized water. (Minimum temperature: -31 F [-35 C])
Canada:
“Toyota Super Long Life Coolant” is a mixture of 55% coolant an d 45%
deionized 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 radiators, hoses, engine/power control unit coolant reser-
voir 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 systems.
WARNING
■ When the hybrid system is hot
Do not remove the engine coolant radiator cap and power control unit cool-
ant reservoir cap.
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.

5298-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U
WARNING
■To prevent an accident or injury when inspecting under the hood of
your vehicle
● 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, caus-
ing serious injuries such as burns.
● After the hybrid system has been turned off, check that on the multi-
information display and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may au tomati-
cally start, or the cooling fan may suddenly operate even if th e gasoline
engine stops. Do not touch or approach rotating parts such as t he 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 radiator cap while the hybrid system and radi ator are
hot.
Serious injuries, such as burns, may result from hot coolant an d steam
released under pressure.
NOTICE
■ When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power
control unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid sys-
tem too quickly can cause damage to the hybrid system.
■ To prevent damage to the cooling system
Observe the following precautions:
● Avoid contaminating the coolant with foreign matter (such as sa nd or dust
etc.).
● Do not use any coolant additive.

592Alphabetical index
PRIUS c_U
Radiator .................................... 426
Radio......................................... 296
Rear seatFolding down ........................ 149
Rear turn signal lights
Replacing light bulbs............. 459
Wattage ................................ 542
Rear view monitor
system
*.................................. 253
Rear window defogger ............ 376
Rear window wiper .................. 216
Resetting the message indicating maintenance
is required .............................. 408
Replacing Fuses .................................... 452
Key battery............................ 449
Light bulbs ............................ 456
Tires ...................................... 502
Reporting safety defects
for U.S. owners ...................... 566 Seat belts
Adjusting the seat belt ............ 30
Automatic Locking
Retractor (ALR) .................... 34
Child restra int system
installation ............................ 65
Cleaning and maintaining the seat belts ...................... 404
Emergency Locking Retractor (ELR) ................... 34
How to wear your seat belt ..... 28
How your child should
wear the seat belt ................. 34
Pregnant women,
proper seat belt use ............. 36
Reminder light ...................... 479
Seat belt extenders................. 35
Seat belt pretensioners........... 34
Seat cushion airbag .................. 39
Seat heaters ............................. 382
Seating capacity ...................... 183
Seats Adjustment............................ 148
Adjustment precautions ........ 148
Child seats/child
restraint system
installation ............................ 62
Cleaning ............................... 401
Front seat adjustment ........... 148
Front seat adjustment precautions......................... 148
Head restraint ....................... 153
Properly sitting in the seat ...... 28
Seat heaters ......................... 382
Service reminder indicators ................................. 92
RS