2018 TOYOTA PRIUS PLUG-IN HYBRID radiator cap

5927-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47C99E_(EE)
Engine compartment
Engine coolant reservoir
( P. 596)
Fuse boxes ( P. 649)
Engine oil level dipstick
( P. 593)
Engine oil filler cap ( P. 594)
Washer fluid tank ( P. 604)
12-volt battery ( P. 599)
Power control unit coolant
reservoir ( P. 596)
Radiator ( P. 598)
Condenser ( P. 598)
Electric cooling fans
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2
3
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5
6
7
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9
10

5977-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47C99E_(EE)
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-borate coolant with
long-life hybrid organic acid technology.
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deion-
ized water. (Minimum temperature: -35 C [-31F])
For more details about coolant, contact any authorized Toyota retailer or
Toyota authorized repairer, or any reliable repairer.
■ If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine/power control unit coolant reservoir
caps, drain cock and water pump.
If you cannot find a leak, have any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer, 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 caps.
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 correct 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 parts or paint.

764Alphabetical index
PRIUS PHV_OM_OM47C99E_(EE)
Navigation system*
Odometer .................................. 217
Oil
Engine oil .............................. 730
Opener
Back door .............................. 282
Fuel filler door ....................... 381
Hood ..................................... 589
Outside rear view mirrors ....... 328
Adjustment ............................ 328
Blind Spot Monitor................. 442
Folding .................................. 328
Outside rear view mirror
defoggers............................ 535
Outside temperature
display .................................... 215
Overhead console.................... 555
Overheating .............................. 718
P position switch ..................... 358
Parking assist sensors
Intelligent Clearance
Sonar .................................. 470
S-IPA (Simple Intelligent
Parking Assist System)....... 483
Toyota parking
assist-sensor ...................... 459
Parking brake ........................... 364
Operation .............................. 364
Parking brake engaged
warning buzzer ................... 364Parking lock ............................. 358
PCS (Pre-Crash Safety
system)................................... 395
Enabling/disabling the
system ................................ 399
Function ................................ 395
Warning light ......................... 673
Personal lights ......................... 548
Switch ................................... 549
Wattage ................................ 735
Plug-in hybrid system ............... 96
Driving tips ............................ 116
EV City mode .......................... 97
EV driving range ................... 119
EV mode ................................. 97
EV/HV mode selection
switch ................................. 100
Features.................................. 96
How to charge....................... 160
HV mode ................................. 97
Hybrid battery (traction
battery) charge mode ........... 97
Power control unit coolant ..... 596
Capacity ................................ 732
Checking ............................... 596
Preparing and checking
before winter....................... 525
Radiator ................................ 598
Power outlets ........................... 562
Power sources ......................... 144
Power steering (Electric
Power Steering system) ....... 519
Function ................................ 519
Warning light ......................... 672
N
O
P

765Alphabetical index
PRIUS PHV_OM_OM47C99E_(EE)
Power switch ............................ 351
Auto power off function ......... 353
Changing the power
switch modes...................... 353
If your vehicle has to be
stopped in an emergency ... 663
Starting the hybrid system .... 351
Power windows ........................ 330
Catch protection function ...... 331
Door lock linked window
operation............................. 332
Jam protection function ......... 331
Operation .............................. 330
Window lock switch ............... 330
Pre-Crash Safety system
(PCS)....................................... 395
Enabling/disabling the
system ................................ 399
Function ................................ 395
Warning light ......................... 673
Radar cruise control
(dynamic radar cruise
control with full-speed
range) ..................................... 422
Radiator .................................... 598
Radio
*
Rear fog light............................ 375
Replacing light bulbs ............. 658
Switch ................................... 375Rear passengers’ seat belt
reminder light ........................ 674
Rear seat .................................. 319
Rear turn signal lights............. 363
Replacing light bulbs............. 658
Turn signal lever ................... 363
Rear view mirror
Inside rear view mirror .......... 326
Outside rear view mirrors...... 328
Rear view monitor system
*
Rear window defogger ............ 535
Refueling .................................. 379
Capacity ................................ 728
Fuel types ............................. 728
Opening the fuel tank cap ..... 381
When the fuel filler door
cannot be opened............... 381
Regenerative braking .............. 105
Remote Air Conditioning
System ................................... 542
Replacing
Electronic key battery ........... 646
Fuses .................................... 649
Light bulbs ............................ 653
Tires ...................................... 627
Wiper rubber ......................... 643
Road accident cautions .......... 113
Road Sign Assist (RSA) .......... 417
R
*: Refer to the “Navigation system Owner’s manual”.