2023 TOYOTA RAV4 PLUG-IN HYBRID radiator cap

479
7 7-3. Do-it-yourself maintenance
Maintenance and care
Fuse boxes (P.513)
Engine oil filler cap (P.480)
Engine oil level dipstick (P.479)
Radiator (P.482)
Electric cooling fan
Condenser (P.482)
Power control unit coolant reservoir (P.482)
Washer fluid tank (P.483)
Engine coolant reservoir (P.481)
■12-volt battery
P.484
With the engine at operating tem-
perature and turned off, check the
Engine compartment
Components
A
B
C
D
E
F
G
H
I
Checking and adding the
engine oil

4827-3. Do-it-yourself maintenance
“LOW” line
If the level is on or below the “LOW”
line, add coolant up to the “FULL” line.
( P.578)
■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.580)
■Coolant selection
Only use “Toyota Super Long Life Coo- lant” 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 radiators, hoses,
engine/power control unit coolant reser- voir caps, drain cock and water pump.If you cannot find a leak, have any
authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer, test the cap and check for leaks in the cooling system.
Check the radiator and condenser,
and clear away any foreign objects.
If either of the above parts is
extremely dirty or you are not sure
of their condition, have your vehicle
inspected by any authorized Toyota
retailer or Toyota authorized
repairer, or any reliable repairer.
C
A
B
C
WARNING
■When the hybrid system is hot
Do not remove the engine/power con- trol 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 mix-ture 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

581
8
8-2. Steps to take in an emergency
When trouble arises
again and check the multi-infor-
mation display.
If the message does not disappear:
Stop the hybrid system and contact any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer. If the message is not displayed: The hybrid system temperature has
dropped and the vehicle may be driven normally. However, if the message appears again
frequently, contact any authorized Toyota retailer or Toyota authorized repairer, or any reliable repairer.
WARNING
■When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
●If steam is seen coming from under
the hood, do not open the hood until the steam has subsided. The engine compartment may be very
hot.
●After the hybrid system has been
turned off, check that the “READY” indicator is off.When the hybrid system is operat-
ing, the gasoline engine may auto- matically start, or the cooling 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, result-ing in serious injury.
●Do not loosen the coolant reservoir cap while the hybrid system and
radiator are hot. High temperature steam or coolant could spray out.
NOTICE
■When adding engine/power con-trol 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 dam- age to the hybrid system.
■To prevent damage to the cool-ing system
Observe the following precautions:
●Avoid contaminating the coolant with foreign matter (such as sand or dust, etc.).
●Do not use any coolant additive.

624Alphabetical Index
Function ..................................... 343
Warning light .............................. 537
Warning message .............. 341, 547
Personal lights .............................. 444
Switch ........................................ 444
PKSB (Parking Support Brake) ... 403
Indicator ..................................... 184
Parking Support Brake function
(rear-crossing vehicles) ........... 410
Parking Support Brake function
(static objects) ......................... 407
Warning light .............................. 538
Plug-in hybrid system .................... 84
AUTO EV/HV mode switch .......... 86
AUTO EV/HV mode ..................... 85
Driving tips ................................. 100
EV driving range ........................ 103
EV mode ...................................... 85
EV/HV mode selection switch ...... 86
Features ....................................... 84
How to charge ............................ 135
HV mode ...................................... 85
Hybrid battery (traction battery)
charge mode .............................. 85
Power back door switch ...... 243, 244
Power control unit coolant .......... 481
Capacity ..................................... 588
Checking .................................... 482
Preparing and checking before win-
ter ............................................ 422
Radiator ..................................... 482
Power outlets ................................ 453
Power sources .............................. 124
Power steering (Electric Power
Steering system) ........................ 416
Warning light .............................. 536
Power switch ................................ 310
Auto power off function .............. 313
Changing the power switch modes
................................................. 313
If your vehicle has to be stopped in an emergency .......................... 526
Starting the hybrid system.......... 310
Power windows
Catch protection function ........... 279
Door lock linked window operation
................................................. 280
Jam protection function .............. 279
Operation ...................................279
Window lock switch .................... 281
Pre-Collision System (PCS)
Enabling/disabling the pre-collision
system...................................... 346
Function ..................................... 343
Warning light .............................. 537
Warning message .............. 341, 547
Predictive efficient drive ................ 93
R
Radar cruise control
Dynamic radar cruise control with
full-speed range .......................368
Radiator ......................................... 482
RCTA (Rear Crossing Traffic Alert)
RCTA Function................... 386, 391
Warning message ...................... 388
Rear Crossing Traffic Alert (RCTA)
..................................................... 386
Rear fog light
Replacing light bulbs ..................516
Switch......................................... 331
Rear passengers’ seat belt reminder
light ..............................................542
Rear seat........................................259
Folding down the rear seatbacks260
Head restraints ........................... 264
Seat heaters ............................... 441
Rear turn signal lights
Replacing light bulbs ..................516
Turn signal lever......................... 319
Wattage ...................................... 591
Rear view mirror