radiator cap TOYOTA PRIUS PLUG-IN HYBRID 2023 Owners Manual

5877-3. Do-it-yourself maintenance
Prius Plug-in Hybrid_OM_OM47F38E_(EE)
7
Maintenance and care
Engine compar tment
IO73PH114
Engine coolant reservoir
( P. 591)
Fuse boxes ( P. 635)
Engine oil level dipstick
( P. 588)
Engine oil filler cap ( P. 589)
Washer fluid tank ( P. 598)
12-volt battery ( P. 594)
Power control unit coolant
reservoir ( P. 591)
Radiator ( P. 593)
Condenser ( P. 593)
Electric cooling fans
1
2
3
4
5
6
7
8
9
10

5927-3. Do-it-yourself maintenance
Prius Plug-in Hybrid_OM_OM47F38E_(EE)
■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.

752Alphabetical index
Prius Plug-in Hybrid_OM_OM47F38E_(EE)
Navigation system*
Odometer .................................. 214
Oil
Engine oil .............................. 717
Opener
Back door .............................. 278
Fuel filler door ....................... 353
Hood ..................................... 584
Outside rear view mirrors ....... 301
Adjustment ............................ 301
BSM (Blind Spot Monitor) ..... 423
Folding .................................. 301
Outside rear view mirror
defoggers............................ 527
Outside temperature
display .................................... 212
Overhead console.................... 548
Overheating .............................. 705
P position switch ..................... 330
Panoramic view monitor
*
Parking assist sensors
Parking Support Brake
function ............................... 462
S-IPA (Simple Intelligent
Parking Assist System)....... 473
Toyota parking
assist-sensor ...................... 450Parking brake ........................... 336
Operation .............................. 336
Parking brake engaged
warning buzzer ................... 336
Parking lock ............................. 330
Parking Support Brake
function .................................. 462
PCS (Pre-Collision System) .... 368
Enabling/disabling the
system ................................ 372
Function ................................ 368
Warning light ......................... 661
Personal lights ......................... 541
Switch ................................... 542
Wattage ................................ 723
Plug-in hybrid system ............... 84
Driving tips ............................ 105
EV City mode .......................... 85
EV driving range ................... 109
EV mode ................................. 85
EV/HV mode selection
switch ................................... 88
Features.................................. 84
How to charge....................... 155
HV mode ................................. 85
Hybrid battery (traction
battery) charge mode ........... 85
Power control unit coolant ..... 591
Capacity ................................ 720
Checking ............................... 591
Preparing and checking
before winter....................... 516
Radiator ................................ 593
N
O
P

753Alphabetical index
Prius Plug-in Hybrid_OM_OM47F38E_(EE)
Power outlets ........................... 556
Power sources ......................... 139
Power steering (Electric
Power Steering) ..................... 510
Function ................................ 510
Warning light ......................... 660
Power switch ............................ 323
Auto power off function ......... 325
Changing the power
switch modes...................... 325
If your vehicle has to be
stopped in an emergency ... 649
Starting the hybrid system .... 323
Power windows ........................ 303
Catch protection function ...... 304
Door lock linked window
operation............................. 305
Jam protection function ......... 304
Operation .............................. 303
Window lock switch ............... 303
Pre-Collision System (PCS) .... 368
Enabling/disabling the
system ................................ 372
Function ................................ 368
Warning light ......................... 661
Radar cruise control
Dynamic radar cruise control
with full-speed range .......... 401
Radiator .................................... 593
Radio
*
RCTA (Rear Crossing Traffic
Alert) ....................................... 443
Blind Spot Monitor
function ............................... 439
Rear Crossing Traffic Alert
function ............................... 443Rear Crossing Traffic Alert
(RCTA) .................................... 443
Blind Spot Monitor
function ............................... 439
Rear Crossing Traffic Alert
function ............................... 443
Rear fog light ........................... 347
Replacing light bulbs............. 644
Switch ................................... 347
Rear passengers’ seat belt
reminder light ........................ 662
Rear seat .................................. 292
Rear seat reminder function ... 276
Rear turn signal lights............. 335
Replacing light bulbs............. 644
Turn signal lever ................... 335
Rear view mirror
Inside rear view mirror .......... 299
Outside rear view mirrors...... 301
Rear view monitor system
*
Rear window defogger ............ 527
Refueling .................................. 351
Capacity ................................ 716
Fuel types ............................. 716
Opening the fuel tank cap ..... 353
When the fuel filler door
cannot be opened............... 353
Regenerative braking ................ 93
Remote Air Conditioning
System ................................... 535
Replacing
Electronic key battery ........... 632
Fuses .................................... 635
Light bulbs ............................ 639
Tires ...................................... 612
Wiper insert........................... 629
Road accident cautions .......... 102
Road Sign Assist (RSA) .......... 395
RSA (Road Sign Assist) .......... 395
R
*: Refer to “Navigation system Owner’s manual”.