2021 TOYOTA RAV4 PLUG-IN HYBRID engine coolant

6128-2. Steps to take in an emergency
3After the hybrid system has
cooled down sufficiently, inspect
the hoses and radiator core
(radiator) for any leaks.
Radiator
Cooling fan
If a large amount of coolant leaks,
immediately contac t any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
4 The coolant level is satisfactory
if it is between the “FULL” and
“LOW” lines on the reservoir.
Reservoir
“FULL” line
“LOW” line
5 Add coolant if necessary.
Water can be used in an emergency if
engine coolant is unavailable.
If water was added in an emergency,
have the vehicle i nspected at any
authorized Toyota r etailer or Toyota authorized repairer, or any reliable
repairer as soon as possible.
6 Start the hybrid system and turn
the air conditioning system on to
check that the radiator cooling
fan operates and to check for
coolant leaks from the radiator
or hoses.
The fan operates when the air condi -
tioning system is turned on immediately
after a cold start. Confirm that the fan is operating by check ing the fan sound
and air flow. If it is difficult to check
these, adjust the temperature control switch to “LO” and turn the “A/C” switch
ON and OFF. After t his, turn the air
conditioning system o n and off repeat- edly. (The fan may not operate in freez-
ing temperatures.)
7 If the fan is not operating:
Stop the hybrid system immedi -
ately and contact any authorized
Toyota retailer or Toyota autho -
rized repairer, or any reliable
repairer.
If the fan is operating:
Have the vehicle inspected at
the nearest authorized Toyota
retailer or Toyota authorized
repairer, or any reliable repairer.
A
B
A
B
C

613
8
8-2. Steps to take in an emergency
When trouble arises
8 Check if “Engine Coolant Temp
High Stop in a Safe Place See
Owner’s Manual” is shown on
the multi-information display.
If the message does not disap -
pear:
Stop the hybrid system and con -
tact any authorized Toyota
retailer or Toyo ta authorized
repairer, or any reliable repairer.
If the message is not displayed:
Have the vehicle inspected at
the nearest authorized Toyota
retailer or Toyo ta authorized
repairer, or any reliable repairer.
■If “Hybrid System Overheated
Output Power Reduced” is
shown on the multi-informa -
tion display
1 Stop the vehicle in a safe place.
2 Stop the hybrid system and
carefully lift the hood.
3 After the hybrid system has
cooled down, inspect the hoses
and radiator core (radiator) for
any leaks.
Radiator
Cooling fan
If a large amount o f coolant leaks,
immediately contact any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
4 The coolant level is satisfactory
if it is between the “FULL” and
“LOW” lines on the reservoir.
Reservoir
“FULL” line
“LOW” line
5 Add coolant if necessary.
Water can be used in an emergency if
power control unit coolant is unavail- able.
If water was added in an emergency,
have the vehicle i nspected at any authorized Toyota r etailer or Toyota
authorized repairer, or any reliable
repairer as soon as possible.
6 After stopping the hybrid system
and waiting for 5 minutes or
more, start the hybrid system
again and check th e multi-infor-
A
B
A
B
C

6148-2. Steps to take in an emergency
mation display.
If the message does not disap -
pear: Stop the hybrid system
and contact any authorized
Toyota retailer or Toyota autho -
rized repairer, or any reliable
repairer.
If the message is no t 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 rotatin g parts such as
the fan, which may lead to fingers
or clothing (especia lly a tie, a scarf or a muffler) getting caught, result -
ing in serious injury.
●Do not loosen the c oolant reservoir
cap while t he 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.

6229-1. Specifications
before next oil change
Oil viscosity (0W-16 is explained
here as an example):
• The 0W in 0W-16 indicates the
characteristic o f the oil which
allows cold startability. Oils with
a lower value before the W allow
for easier starting of the engine
in cold weather.
• The 16 in 0W-16 indicates the
viscosity characteristic of the oil
when the oil is at high tempera -
ture. An oil with a higher viscos -
ity (one with a higher value) may
be better suited if the vehicle is
operated at high speeds, or
under extreme load conditions.
How to read oil container labels:
Either or both API registered marks
are added to some oil containers to
help you select the oil you should
use.
API Service Symbol
Top portion: “API SERVICE SN” means
the oil quality designation by American
Petroleum Institute (API).
Center porti on: “SAE 0W-16” means
the SAE viscosity grade.
Lower portion: “Resource-Conserving”
means that the oil has fuel-saving and
environmental protection capabilities.
ILSAC Certification Mark
The International Lubricant Specifica -
tion Advisory Committee (ILSAC) Certi -
fication Mark is displayed on the front of
the container.
*: The coolant capacity is t he quantity of reference.
If replacement is necessary, cont act any authorized Toyota retailer or Toyota
A
B
Cooling system
Capacity*
Gasoline
engine7.4 L (7.8 qt. , 6.5 Imp. qt.)
Power con-
trol unit2.0 L (2.1 qt. , 1.8 Imp. qt.)
Coolant type
Use either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based
non-silicate, non-amine , non-nitrite, and non-
borate coolant with long -life hybrid organic
acid technology
Do not use plain water alone.

651Alphabetical Index
When charging cannot be carried
out ............................................ 156
Charging port ................................ 105
If the charging port lid does not open
................................................. 121
Locking and unlocking ............... 121
Opening and closing .................. 106
Child-protector.............................. 209
Child restraint system .................... 50
Child restraint syst em installation
method....................................... 60
Fixed with a seat belt ................... 61
Fixed with an ISOFIX lower anchor -
age ............................................. 62
Points to remember...................... 51
Riding with children ...................... 49
Using a top tether anchorage....... 63
Child safety ..................................... 49
12-volt battery precautions. 507, 610
Airbag precautions ....................... 43
Back door precautions ............... 210
Charging precautions ................. 133
Heated steering wheel and seat
heater precautions ................... 462
How your child should wear the seat
belt ............................................. 36
Panoramic moon roof precautions
................................................. 296
Power window lock switch ......... 293
Power window precautions ........ 292
Rear door child-protectors ......... 209
Seat belt precautions ................... 35
Seat heater precautions ............. 462
Cleaning ................................ 488, 491
Aluminum wheels ....................... 488
DC/DC Converter air intake vent 536
Exterior....................................... 488
Front camera.............................. 345
Interior ........................................ 491
Radar sensor .......... ................... 345
Seat belts ................................... 491
Water-repellent coating .............. 489
Clock ..............................................179
Coat hooks .................................... 484
Condenser .....................................504
Console box .................................. 469
Consumption screen .................... 195
Coolant
Capacity .....................................622
Checking .................................... 503
Preparing and ch ecking before win-
ter ............................................. 445
Warning light ..............................569
Cooling system .............................503
Engine overheating .................... 611
Hybrid system overh eating.........613
Cruise control
Cruise control .............................388
Dynamic radar cruise control with
full-speed range .......................376
Cup holders ...................................470
Current fuel consumption ............198
Current fuel economy................... 181
Curtain shield airbags .................... 39
Customizable features ................. 629
D
Daytime running light system ..... 332
Replacing light bulbs ..................548
DC/DC converter air intake vent .... 98
Cleaning .....................................536
Deck board .................................... 472
Deck under tray.............................473
Defogger
Outside rear view mirrors ........... 454
Rear window ..............................454
Windshield.................................. 453
Digital Rear-view Mirror ...............280
Dimensions ...................................618
Display
BSM (Blind Spot Monitor)........... 393
Consumption screen ..................195

653Alphabetical Index
If a warning light turns on ........... 568
If a warning message is displayed
................................................. 578
If the 12-volt batt ery is discharged
................................................. 606
If the electronic key does not operate
properly .................................... 604
If the fuel filler door cannot be
opened..................................... 603
If the hybrid system will not start 601
If the vehicle is trapped in rising
water ........................................ 561
If you have a flat tire........... 582, 593
If you lose your keys .................. 603
If you think something is wrong.. 566
If your vehicle becomes stuck .... 615
If your vehicle has to be stopped in
an emergency .......................... 560
If your vehicle needs to be towed
................................................. 563
If your vehicle overheats ............ 611
Emergency brake signal .............. 439
Emergency flashers ..................... 560
Emergency tire puncture repair kit
..................................................... 582
Energy monitor ............................. 195
Engine
Compartment ............................. 501
Exhaust gas precautions.............. 47
Hood .......................................... 498
How to start the hybrid system... 317
Identification number.................. 619
If the hybrid system will not start 601
If your vehicle has to be stopped in
an emergency .......................... 560
Overheating ............................... 611
Power switch .............................. 317
Engine coolant
Capacity ................ ..................... 622
Checking .................................... 503
High coolant temperature warning
light .......................................... 569
Preparing and ch ecking before win-
ter ............................................. 445
Warning light ..............................569
Engine coolant temperature gauge
..................................................... 174
Engine oil
Capacity .....................................621
Checking .................................... 501
Preparing and ch ecking before win-
ter ............................................. 445
Warning light ..............................569
EPS (Electric Power Steering)
Function .....................................438
Warning light ..............................570
EV/HV mode selection switch........ 86
EV driving range ...........................102
EV mode .......................................... 85
Exhaust gas precautions ............... 47
Extended Headlight Lighting system
..................................................... 333
F
Flat tire ...................................582, 593
Tire pressure war ning system ....511
Floor mats ....................................... 32
Fluid
Brake .......................................... 624
Hybrid transmission.................... 623
Rear differential ..........................624
Washer ....................................... 505
Fog lights
Replacing light bulbs ..................548
Switch.........................................337
Wattage ......................................626
Footwell lights............................... 465
Front fog lights
Replacing light bulbs ..................548
Switch.........................................337
Wattage ......................................626
Front passenger’s seat belt reminder

662Alphabetical Index
Utility vehicle precau tions ........... 448
V
Vanity lights
Vanity lights................................ 476
Wattage...................................... 626
Vanity mirrors ............................... 476
Vehicle data recordings ................... 7
Vehicle identification number ..... 618
Vehicle Stability C ontrol (VSC) ... 438
Ventilators (seat ve ntilators) ....... 462
VSC (Vehicle Stabi lity Control) ... 438
W
Warning buzzers
Approach warning ...................... 383
Brake hold .................................. 574
Brake Override System .............. 574
Brake system .......... ................... 568
BSM OFF indicator .................... 573
Charging system ........................ 569
Downshifting ...................... 323, 325
Drive-Start Control ..................... 574
Electric power steering............... 570
High coolant tempera ture........... 569
Hybrid system overh eat ............. 569
Low engine oil pressure ............. 569
LTA (Lane Tracing Assist) . 362, 571
Open door .................................. 208
Open hood ................................. 208
Open window ............................. 292
PKSB OFF indicator... ................ 572
Pre-collision warning .......... 355, 571
Radar cruise control ................... 383
RCTA (Rear Crossi ng Traffic Alert)
................................................. 393
RCTA OFF indicator .................. 573
RSA (Road Sign Assist) ............. 372
Seat belt reminder.. ............ 575, 576
Shift position ...................... 324, 325
Toyota parking assist ................. 414
Toyota parking a ssist-sensor OFF
indicator ...................................572
Vehicle sway warning................. 366
Warning lights
ABS ............................................570
Brake hold operate d indicator .... 574
Brake Override System .............. 574
Brake system ........... ..................568
BSM OFF indicator.....................573
Charging system ...... ..................569
Driver’s seat belt reminder light.. 575
Drive-Start Control .....................574
Electric power steering ...............570
Engine ........................................570
Front passenger’s seat belt reminder
light .......................................... 575
High coolant temperature ........... 569
Hybrid system overh eat .............569
Low engine oil pressure ............. 569
Low fuel level .............................575
LTA indicator ..............................571
Malfunction indicator lamp .........570
Parking brake indicator .............. 574
PCS warning light.......................571
PKSB OFF indicator . .................. 572
PKSB............ .............................. 572
RCTA OFF indicator................... 573
Rear passengers’ seat belt reminder
lights.........................................576
Seat belt reminder light ...... 575, 576
Slip indicator............................... 573
SRS ............................................570
Tire pressure ..............................575
Toyota parking a ssist-sensor OFF
indicator ...................................572
Warning messages .......................578
Washer
Checking .................................... 505
Low washer fluid warning message
.........................................505, 578