2023 TOYOTA RAV4 PRIME radiator cap

4897-3. Do-it-yourself maintenance
7
Maintenance and care
Fuse boxes (P.524)
Engine oil filler cap ( P.490)
Engine oil level dipstick ( P.489)
Brake fluid reservoir ( P.493)
Radiator ( P.492)
Electric cooling fan
Condenser ( P.492)
Power control unit coolant reservoir ( P.492)
Washer fluid tank ( P.494)
Engine coolant reservoir ( P.491)
■12-volt battery
 P.495
With the engine at operating
temperature and turned off,
Engine compartment
Components
A
B
C
D
E
F
G
H
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4927-3. Do-it-yourself maintenance
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the “LOW”
line, add coolant up to the “FULL”
line. (P.574)
■Power control unit coolant
reservoir
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the “LOW”
line, add coolant up to the “FULL”
line. ( P.576)
■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.
U.S.A.:
“Toyota Super Long Life Coolant” is
a mixture of 50% coolant and 50%
deionized water. (Minimum tem-
perature: -31°F [-35°C])
Canada:
“Toyota Super Long Life Coolant” is
a mixture of 55% coolant and 45%
deionized water. (Minimum tem-
perature: -44°F [-42°C])
For more details about coolant, con-
tact your To yota dealer.
■If the coolant level drops within
a short time of replenishing
Visually check the radiators, hoses,
engine/power control unit coolant
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 sys-
tem.
Check the radiator and con-
denser, and clear away any for-
eign objects.
If either of the above parts is
extremely dirty or you are not
sure of their condition, have
A
B
C
A
B
C
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 cool-
ant 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.
Checking the radiator and
condenser

4937-3. Do-it-yourself maintenance
7
Maintenance and care
your vehicle inspected by your
Toyota dealer.
■Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN”
lines on the tank.
■Adding fluid
1 Slide and lift up the rubber
strip to partly remove it as
shown.
2 Disconnect the claws and
remove the service cover.
3 Remove the reservoir cap.
4 Add brake fluid slowly while
checking the fluid level.
Make sure to check the fluid
type and prepare the necessary
item.
WARNING
■When the hybrid system is
hot
Do not touch the r adiator or con-
denser as they may be hot and
cause serious injuries, such as
burns.
■When the electric cooling fan
is operating
Do not touch the engine compart-
ment.
With the power switch in ON, the
electric cooling fan may automati-
cally start to run if the air condi-
tioning is on and/or the coolant
temperature is high. Be sure the
power switch is OFF when work-
ing near the electric cooling fan or
radiator grille.
Checking and adding the
brake fluid

5778-2. Steps to take in an emergency
8
When trouble arises
dropped and the vehicle may be
driven normally.
However, if the message appears
again frequently, contact your
Toyota dealer.
WARNING
■When inspecting under the
hood of your vehicle
Observe the following precau-
tions.
Failure to do so may result in seri-
ous injury such as burns.
●If steam is seen coming from
under the hood, do not open the
hood until the steam has sub-
sided. The engine compart-
ment may be very hot.
●After the hybrid system has
been turned off, check that the
“READY” indicator is off.
When the hybrid system is oper-
ating, the gasoline engine may
automatically start, or the cool-
ing fan 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 reser-
voir cap while the hybrid system
and radiator are hot.
High temperature steam or
coolant could spray out.
NOTICE
■When adding engine/power
control unit coolant
Add coolant slowly after the
hybrid system has cooled down
sufficiently. Adding cool coolant to
a hot hybrid system too quickly
can cause damage to the hybrid
system.
■To prevent damage to the
cooling system
Observe the following precau-
tions:
●Avoid contaminating the coolant
with foreign matter (such as
sand or dust, etc.).
●Do not use any coolant additive.

644Alphabetical Index
Back door ..................... 229, 231
Fuel filler door ...................... 333
Garage door ......................... 463
Hood..................................... 486
Outer foot lights Replacing light bulbs ............ 528
Wattage ................................ 586
Outside rear view mirrors ...... 268 Adjusting and folding ............ 268
BSM (Blind Spot Monitor)..... 379
Outside rear view mirror defog-gers .................................... 424
Outside temperature ...... 176, 178
Outside temperature display . 176
Overheating ............................ 574
P
Paddle shift switches ............. 311
Panic mode ............................. 220
Panoramic moon roof Jam protection function ........ 277
Operation ............................. 276
Warning message ................ 278
Parking assist sensors (intuitive parking assist) ...................... 387
Parking brake Operation ............................. 314
Parking brake engaged warning buzzer ................................ 317
Warning light ........................ 547
Warning message ................ 316
Parking lights Light switch .......................... 321
Replacing light bulbs ............ 528
Parking Support Brake (PKSB) ............................................... 395Indicator ............................... 170
Parking Support Brake function (rear-crossing vehicles) ...... 402
Parking Support Brake function (static objects) .................... 400
Warning light ........................ 545 Warning message .
...............399
PCS (Pre-Collision System) Enabling/disabling the pre-colli-sion system ........................343
Function................................340
Warning light ........................544
Warning messag e ........338, 555
Personal lights ........................437 Switch ...................................437
PKSB (Parking Support Brake) ...............................................395Indicator................................170
Parking Support Brake function (rear-crossing vehicles) ......402
Parking Support Brake function (static objects) ....................400
Warning light ........................545
Warning message . ...............399
Plug-in hybrid system ..............74 AUTO EV/HV mode switch .....76
AUTO EV/HV mode ................75
Driving tips..............................90
EV driving range .....................93
EV mode.................................75
EV/HV mode selection switch 76
Features .................................74
How to charge ......................121
HV mode ................................75
Hybrid battery (tr action battery)
charge mode ........................75
Power back door switch 231, 232
Power control unit coolant ....491 Capacity ...............................583
Checking ..............................492
Preparing and checking before winter ..................................413
Radiator ................................492
Power outlets Power outlet (12 V DC) .........445
Power outlet (AC 120 V/1500 W) ...........................................455
Power sources ........................110

Alphabetical Index645
Power steering (Electric Power Steering system) .................. 408Warning light ........................ 543
Power switch .......................... 304 Auto power off function ........ 308
Changing the power switch modes ................................ 307
If your vehicle has to be stopped in an emergency................. 535
Starting the hybrid system.... 304
Power windows Catch protection function ..... 270
Door lock linked window opera-tion ..................................... 271
Jam protection function ........ 270
Operation ............................. 270
Window lock switch .............. 272
Pre-Collision System (PCS) Enabling/disabling the pre-colli-sion system ........................ 343
Function ............................... 340
Warning light ........................ 544
Warning message ........ 338, 555
Predictive efficient drive .......... 83
R
Radar cruise control Dynamic radar cruise control with full-speed range .......... 366
Radiator ................................... 492
RCTA (Rear Cross Traffic Alert) RCTA Function............. 378, 383
Warning message ................ 380
Rear Cross Traffic Alert (RCTA) ............................................... 378
Rear passengers’ seat belt reminder light ....................... 548
Rear seat ................................. 248 Folding down the rear seatbacks........................................... 249
Head restraints ..................... 253
Seat heaters ......................... 434 Rear side marker lights
Light switch...........................321
Replacing light bulbs ............528
Rear turn signal lights Replacing light bulbs ............528
Turn signal lever . ..................313
Wattage ................................586
Rear view mirror Digital Rear-view Mirror ........258
Inside rear view mirror ..........257
Outside rear view mirrors .....268
Rear window defogger ...........424
Rear window wiper .................330
Refueling ............ .....................332
Capacity ...............................581
Fuel types .....................581, 587
If the fuel filler door cannot be opened ...............................566
Opening the fuel tank cap ....333
Regenerative braking ...............80
Remote Air Conditioning System ...............................................431
Replacing Electronic key battery ...........522
Fuses....................................524
Light bulbs ............................528
Tires .....................................557
Wiper insert ..........................519
Reporting safety defects for Canadian owners ..................619
Reporting safety defects for U.S. owners ...................................618
Resetting the message indicat- ing maintenance is required 479
Road accident cautions ...........87
Road Sign Assist ....................363
RSA (Road Sign Assist) .........363
S
Safety Connect .........................65
Seat belt reminder light..........548
Seat belts...................................29