2021 TOYOTA RAV4 PLUG-IN HYBRID coolant

497
7
7-3. Do-it-yours elf maintenance
Maintenance and care
WARNING
■When working on the engine
compartment
●Make sure that “IGNITION ON” on the multi-information display and
the “READY” indicat or are both off.
●Keep hands, clothing and tools
away from the moving fan.
●Be careful not to touch the engine, power control unit, radiator, exhaust
manifold, etc. right after driving as
they may be hot. Oil and other flu - ids may also be hot.
●Do not leave anyt hing that may burn easily, such as paper and
rags, in the engi ne compartment.
●Do not smoke, cause sparks or
expose an open flame to fuel or the
12-volt battery. Fu el and 12-volt battery fumes are flammable.
●Take care because brake fluid can harm your hands or eyes and dam -
age painted surfac es. If fluid gets
on your hands or in your eyes, flush the affected area with clean water
immediately. If you still experience
discomfort, consult a doctor.
■When working near the electric
cooling fan or radiator grille
Be sure the power switch is off.
With the power swi tch in ON, the
electric cooling fan may automatically start to run if the air conditioning is on
and/or the coolant temperature is
high. ( →P.504)
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc.,
from getting in your eyes.
NOTICE
■If you remove th e air cleaner fil-
ter
Driving with the air cleaner filter removed may cause excessive
engine wear due to dirt in the air.
■If the fluid level is low or high
It is normal for the br ake fluid level to
go down slightly as the brake pads
wear or when the fluid level in the accumulator is high.
If the reservoir needs frequent refill -
ing, it may indicate a serious problem.

501
7
7-3. Do-it-yours elf maintenance
Maintenance and care
Fuse boxes (→P.545)
Engine oil filler cap ( →P.502)
Engine oil level dipstick ( →P.501)
Radiator ( →P.504)
Electric cooling fan
Condenser ( →P.504)
Power control unit coolant reservoir ( →P.504)
Washer fluid tank ( →P.505)
Engine coolant reservoir ( →P.503)
■12-volt battery
→ P.506
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

503
7
7-3. Do-it-yours elf maintenance
Maintenance and care
■Engine oil consumption
A certain amount o f engine oil will be
consumed while driving. In the following
situations, oil consumption may increase, and engine oil may need to be
refilled in between oil maintenance inter -
vals.
●When the engine is new, for example
directly after purchasing the vehicle or after replacing the engine
●If low quality oil or oil of an inappropri - ate viscosity is used
●When driving at high engine speeds or with a heavy load , when towing, or
when driving while accelerating or
decelerating frequently
●When leaving the engine idling for a
long time, or when driving frequently through heavy traffic
The coolant level is satisfactory if it
is between the “ FULL” and “LOW”
lines on the reservoir when the
hybrid system is cold.
■Engine coolant reservoir
Reservoir cap
“FULL” line
WARNING
■Used engine oil
●Used engine oil contains poten -
tially harmful contaminants which may cause skin di sorders such as
inflammation and skin cancer, so
care should be taken to avoid pro - longed and repeated contact. To
remove used engine oil from your
skin, wash thoroughly with soap and water.
●Dispose of used oi l and filters only in a safe and acceptable manner.
Do not dispose of used oil and fil -
ters in household trash, in sewers or onto the ground. Call any autho -
rized Toyota ret ailer or Toyota
authorized repairer, or any reliable repairer, service station or auto
parts store for in formation concern-
ing recycling or disposal.
●Do not leave used e ngine oil within
the reach of children.
NOTICE
■To prevent serious engine dam -
age
Check the oil level on a regular basis.
■When replacing the engine oil
●Be careful not to spill engine oil on the vehicle components.
●Avoid overfilling, or the engine
could be damaged.
●Check the oil leve l on the dipstick
every time you refill the vehicle.
●Be sure the engine oil filler cap is
properly tightened.
■If oil is spilled on the engine
cover
To prevent the engine cover from
being damaged, remove any engine
oil from the engine cover as soon as possible using a neutral detergent. Do
not use an organic solvent such as
brake cleaner.
Checking the coolant
A
B

5047-3. Do-it-yourself maintenance
“LOW” line
If the level is on or below the “LOW”
line, add coolant up to the “FULL” line.
( →P.611)
■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.613)
■Coolant selection
Only use “Toyota Super Long Life Coo - lant” or a similar hig h quality ethylene
glycol based non-si licate, non-amine,
non-nitrite, and non- borate coolant with long-life hybrid org anic acid technology.
“Toyota Super Long Life Coolant” is a
mixture of 50% coolant and 50% deion - ized water. (Minimu m 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 r etailer 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 anti freeze 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

5668-2. Steps to take in an emergency
5Securely attach cables or chains
to the towing eyelet.
Take care not to damage the vehicle
body.
6 Enter the vehicle being towed
and start the hybrid system.
Turn off the Parking Support Brake
function. (if equipped): →P.420
If the hybrid system d oes not start, turn
the power switch to ON.
7 Shift the shift lever to N and
release the parking brake.
Turn automatic mode off. ( →P.327)
When the shift lever cannot be shifted:
→ P.323
■While towing
If the hybrid system is not running, the
power assist for the brakes and steering will not function, making steering and
braking more difficult.
■Wheel nut wrench (if equipped)
Wheel nut wrench is installed in the deck under tray. ( →P.583, 594)
Fluid leaks under the vehicle
(Water dripping from the air con -
ditioning after use is normal.)
 Flat-looking tires or uneven tire
wear
 High coolant temperature warn-
ing light flashes or come on
 Changes in exhaust sound
 Excessive tire squeal when cor-
nering
 Strange noises related to the
suspension system
 Pinging or other noises related to
the hybrid system
 Engine missing, stumbling or
running roughly
 Appreciable loss of power
If you think something is
wrong
If you notice any of the follow -
ing symptoms, your vehicle
probably needs adjustment or
repair. Contact any authorized
Toyota retailer or Toyota
authorized repairer, or any reli -
able repairer as soon as possi -
ble.
Visible symptoms
Audible symptoms
Operational symptoms

569
8
8-2. Steps to take in an emergency
When trouble arises
■Charging system warning light*
*: This light illuminates on the multi-information display.
■High coolant temperature warning light* (warning buzzer)
*: This light illuminates on the multi-information display with a message.
■Hybrid system overheat warning light* (warning buzzer)
*: This light illuminates on the multi-information display with a message.
■Low engine oil pressure warning light* (warning buzzer)
*: This light illuminates on the multi-information display with a message.
Warning lightDetails/Actions
Indicates a malfunction in the vehicle’s charging sys-
tem
→ Immediately stop the vehicle in a safe place
and contact any authorized Toyota retailer or
Toyota authorized repairer, or any reliable
repairer.
Warning lightDetails/Actions
Indicates that the engine is overheating
→ Immediately stop the vehicle in a safe place.
Handling method ( →P.611)
Warning lightDetails/Actions
Indicates that the hybrid system has overheated
→ Stop the vehicle in a safe place.
Handling method ( →P.611)
Warning lightDetails/Actions
Indicates that the engine oil pressure is too low
→ Immediately stop the vehicle in a safe place
and contact any authorized Toyota retailer or
Toyota authorized repairer, or any reliable
repairer.

579
8
8-2. Steps to take in an emergency
When trouble arises
A warning message about an operation
of the brake pedal m ay be shown while
the driving suppor t systems such as
PCS (Pre-Collis ion system) (if
equipped) or the dynamic radar cruise
control with full- speed range (if
equipped) is operating. If a warning
message is shown, be sure to deceler -
ate the vehicle or follow an instruction
shown on the multi-in formation display.
• A warning message is shown when
Brake Override System operates. ( →P.301, 574)
• A warning message is shown when
Drive-Start Control or Parking Support Brake function (if equipped) operates
( →P.301, 420). Follow the instructions
on the multi-information display.
●If a message about an operation of
the power switch is shown
An instruction for operation of the power
switch is shown when the incorrect pro -
cedure for starting the hybrid system is
performed or the power switch is oper -
ated incorrectly. Follow the instructions
shown on the multi-in formation display
to operate the pow er switch again.
●If a message about a shift lever opera-
tion is shown
To prevent the shift lever from being
operated incorrectly or the vehicle from
moving unexpectedly, a message that
requires shifting the shift lever may be
shown on the multi-in formation display.
In that case, follow the instruction of the
message and shift the shift lever.
●If a message or image about an
open/close state of a part or replen-
ishment of a consumable is shown
Confirm the part indicated by the multi-
information display or a warning light,
and then perform the coping method
such as closing the open door or replen -
ishing a consumable.
■If a message that indicates the
need for visiting any authorized Toyota retailer or Toyota autho -
rized repairer, or any reliable
repairer is displayed
The system or part sh own on the multi-
information display is malfunctioning.
Have the vehicle inspected by any authorized Toyota r etailer or Toyota
authorized repairer, or any reliable
repairer immediately.
■If a message that indicates the need for referring to Owner’s Man -
ual is displayed
●If the following messages are shown,
follow the instructions, accordingly.
• “Blind Spot Monitor Unavailable” ( →P.394, 578)
• “RCTA Unavailable” ( →P.394, 578)
• “Engine Coolant Temp High” ( →P.611)
• “Exhaust Filter Full” ( →P.437)
●If the following messages are shown,
there may be a malfunction. Immedi -
ately stop the vehicle in a safe place and contact any authorized Toyota
retailer or Toyota authorized repairer,
or any reliable repairer. Continuing to drive the vehicle may be dangerous.
• “Plug-in charging system malfunction”
• “Hybrid System Malfunction” • “Charging System Malfunction”
• “Check Engine”
• “Hybrid Battery System Malfunction” • “Accelerator System Malfunction”
• “Smart Entry & Start System Malfunc -
tion”
●If the following messages are shown,
there may be a malfunction. Immedi - ately have the vehi cle inspected by
any authorized Toyota retailer or
Toyota authorized repairer, or any reli -
able repairer. • “Oil Pressure Low”
• “Braking Power Low”
●If any of the following messages are
shown on the multi-information dis -
play, the vehicle ma y have run out of fuel. Stop the vehicle in a safe place
and, if the fuel leve l is low, refuel the

611
8
8-2. Steps to take in an emergency
When trouble arises
■If the high coolant temperature
warning light comes on,
flashes or “Engine Coolant
Temp High Stop in a Safe
Place See Owner’s Manual” is
shown on the multi-informa -
tion display
1 Stop the vehicle in a safe place
and turn off the air conditioning
system, and then stop the hybrid
system.
2 If you see steam:
Carefully lift th e hood after the
steam subsides.
If you do no t see steam:
Carefully lift the hood.
NOTICE
■When handling jumper cables
When connecting the jumper cables,
ensure that they do not become entangled in the cooling fan, etc.
■To prevent damaging the vehicle
The exclusive jump starting terminal
is to be used when charging the 12-
volt battery from another vehicle in an
emergency. It cannot be used to jump start another vehicle.
If your vehicle overheats
The following may indicate that
your vehicle is overheating.
 The high coolant temperature
warning light ( →P.170) comes
on or flashes, or a loss of
hybrid system power is experi -
enced. (For example, the vehi -
cle speed does not increase.)
 “Engine Coolant Temp High
Stop in a Safe Place See
Owner’s Manual” or “Hybrid
System Overheated Output
Power Reduced” is shown on
the multi-information display.
 Steam comes out from under
the hood.
Correction procedures