2021 TOYOTA RAV4 PLUG-IN HYBRID coolant

882-1. Plug-in hybrid system
be changed even if the AUTO EV/HV
mode switch or EV/HV mode selection switch is pressed. ( In this case, the
warning message is displayed on the
multi-information display when the switch is pressed.)
●When electricity needed for EV driving is not remaining (when in EV mode or
AUTO EV/HV mode)
●When the traction battery is almost
completely charged (hybrid battery
[traction battery] charge mode)
■When switching from EV mode to another mode using the switch
●After switching from EV mode to HV
mode or hybrid battery (traction bat - tery) charge mode and the power
switch is turned off, the system
returns to EV mode the next time the
vehicle is started.*
●After switching from EV mode to
AUTO EV/HV mode and the power switch is turned o ff, the system does
not return to EV mode the next time
the vehicle is started.*
*: If there is not enough charge remain-
ing in the hybrid battery (traction bat -
tery) to allow EV dr iving, the system
switches to HV mode.
■Hybrid battery (tr action battery) charge mode
●The following may occur to protect the system, etc.
• Cannot switch to hybrid battery (trac -
tion battery) char ge mode or cannot cancel it
• Gasoline engine does not start or
stops even after s witching to hybrid battery (traction battery) charge mode
●If a load to the syst em is large, such
as when the power consumption of the air conditioning system is large or
when the temperatur e of the engine
coolant is high, it may take longer time than usual to charge using the hybrid
battery (traction battery) charge
mode, or charging to the hybrid bat - tery (traction battery) may not be per -
formed.
■When in EV mode
In EV mode, EV driving (driving
using only the electric motor)* is
possible. Howeve r, depending on
the situation, EV driving may be
canceled and both gasoline engine
and electric motor are used
( →P.90). Also, if a little electricity is
remaining in the hybrid battery
(traction battery) , HV mode is auto-
matically selected. To drive in EV
mode long, observe the followings.
 Avoid sudden acceleration and
sudden deceleration, and be
sure to drive smoothly.
If you repeatedly accelerate, the
hybrid battery (traction battery)
WARNING
■When using the hybrid battery (traction battery ) charge mode
Observe the following precautions
when using the hybrid battery (trac - tion battery) char ge mode while park-
ing.
Failure to do so may lead to death or
serious health hazard, as the gasoline engine operates when in the hybrid
battery (traction battery) charge
mode.
●Do not stop the vehicle near flam -
mable materials.
●Do not use the hybrid battery (trac -
tion battery) charge mode in a
closed area where ventilation is insufficient, such a s in a garage or
area with snow buildup.
Control when driving in
each mode

1703-1. Instrument cluster
Warning lights inform the driver of
malfunctions in the indicated vehi -
cle’s systems.
*1: These lights turn on when the power
switch is turned to ON to indicate
that a system check is being per -
formed. They will turn off after the
hybrid system is on , or after a few
seconds. There may be a malfunc-
tion in a system if the light does not
come on, or turn off. Have the vehi -
cle inspected by any authorized
Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
Warning lights
(Red)
Brake system warning
light*1 ( →P.568)
(Yellow)
Brake system warning
light*1 ( →P.568)
Charging system warn -
ing light*1 ( →P.569)
High coolant temperature
warning light*2 ( →P.569)
Hybrid system overheat
warning light*2 ( →P.569)
Low engine oil pressure
warning light*2 ( →P.569)
Malfunction indicator
lamp*1 ( →P.570)
SRS warning light*1
( →P.570)
ABS warning light*1
( →P.570)
(Red/yellow)
Electric power steering
system warning light*1
( →P.570)
(Flashes or illu- minates)
PCS warning light*1 (if
equipped) ( →P.571)
(Orange)
LTA indicator (if
equipped) ( →P.571)
Toyota parking assist-
sensor OFF indicator*3 ( i f
equipped) ( →P.572)
PKSB OFF indicator*1 (if
equipped) ( →P.572)
BSM OFF indicator*1 (if
equipped) ( →P.573)
RCTA OFF indicator*1 (if
equipped)
( →P.573)
Slip indicator light*1
( →P.573)
Brake Override Sys -
tem/Drive-Start Con -
trol/PKSB (if equipped)
warning light*2 ( →P.574)
(Flashes)
Brake hold operated indi-
cator*1 ( →P.574)
(Flashes)
Parking brake indicator
( →P.574)
Tire pressure warning
light*1 ( →P.575)
Low fuel level warning
light ( →P.575)
Driver’s and front pas -
senger’s seat belt
reminder light ( →P.575)
Rear passengers’ seat
belt reminder lights
( →P.576)

1783-1. Instrument cluster
changed suddenly (at the
entrance/exit of a garage, tunnel, etc.)
●When “--” or “E” is displayed, the sys -
tem may be malfunctioning. Take your vehicle to any authorized
Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
●Displays the outsi de temperature
within the range o f -40°C (-40°F) to 50°C (122°F).
●When the outside temperature is
approximately 3°C (37°F) or lower,
the indicator will flash for approxi-
mately 10 seconds, then stay on.
■Liquid crystal display
→ P.180
■Customization
Settings (e. g. mete r display) can be
changed on the scre en of the multi-
information display. ( →P.186)
Switches the items of the odome-
ter, trip meter A, trip meter B and
the brightness of the instrument
cluster lights by pressing the “ODO
TRIP” switch.
 When the trip meter is displayed,
pressing and holding the switch
will reset the tr ip meter.
 When the instrument cluster light
control display is displayed,
pressing and holding the switch
will adjust the brightness of the
instrument cluster lights.
■Instrument cluster brightness
adjustment
The instrument cluster brightness levels when the tail lights are on and off can be
WARNING
■The information display at low
temperatures
Allow the interior o f the vehicle to
warm up before usin g the liquid crys-
tal information display. At extremely low temperatures, the display moni -
tor may respond slowly, and display
changes may be delayed.
For example, there is a lag between
the driver’s shifting and the new shift
range appearing on the display. This lag could cause the driver to down -
shift again, causing rapid and exces -
sive engine braking and possibly an accident resulting in death or injury.
NOTICE
■To prevent damage to the engine
and its components
●The engine may be overheating if “Engine Coolant Temp High Stop in
a Safe Place See Owner’s Manual”
is shown on the multi-information display. In this case, immediately
stop the vehicle in a safe place, and
check the engine after it has cooled
completely. ( →P.611)
Using the “ODO TRIP”
switch

315
5
5-1. Before driving
Driving
■Sudden acceleration/steering
input/cornering
Executing sharp turns when towing
may result in the trailer colliding
with your vehicle. D ecelerate well in
advance when approaching turns
and take them slowly and carefully
to avoid sudden braking.
■Important points regarding
turning
The wheels of the tr ailer will travel
closer to the inside of the curve
than the wheels of the vehicle. To
make allowance for this, take the
turns wider than you would nor -
mally do.
■Important points regarding
stability
Vehicle movement resulting from
uneven road surfaces and strong
crosswinds will affect handling. The
vehicle may also be rocked by
passing buses or large trucks. Fre -
quently check behind when moving
alongside such vehicles. As soon
as such vehicle movement occurs,
immediately start to decelerate
smoothly by slowly applying the
brakes. Always steer the vehicle
straight ahead while braking.
■Passing other vehicles
Consider the total combined length
of your vehicle and trailer and
ensure that the vehicle-to-vehicle
distance is sufficient before execut -
ing lane changes.
■Transmission information
To maintain engine braking effi -
ciency, when using engine braking,
do not use the transmission in D.
( →P.321)
■If the hybrid system overheats
Towing a loaded trailer up a long,
steep incline in temperatures
exceeding 30°C (85°F) may result
in the hybrid system overheating. If
the high coolant temperature warn -
ing light indicates that the hybrid
system is overheating, turn the air
conditioning off immediately, leave
the road and stop the vehicle in a
safe place. ( →P.611)
■When parking the vehicle
Always place wheel chocks under
the wheels of both the vehicle and
trailer. Firmly set the parking brake
and shift the shift lever to P.
■Break-in schedule
Toyota recommends that vehicles fitted
with new power train components
should not be used for towing trailers for the first 800 km (500 miles).
■Maintenance
●Maintenance must be performed more frequently when using the vehicle for
towing due to the greater weight bur -
den placed on the vehicle compared to normal driving.
●Retighten all bolts securing the hitch - ing ball and bracket after towing for
approximately 1000 km (600 miles).
■If trailer sway occurs
One or more factor s (crosswinds, pass- ing vehicles, rough roads, etc.) can
adversely affect handling of your vehicle
and trailer, causing instability.

445
5
5-6. Driving tips
Driving
5-6.Driving tips
 Use fluids that are appropriate to
the prevailing outside tempera-
tures.
• Engine oil
• Engine coolant
• Power control unit coolant
• Washer fluid
 Have a service technician
inspect the condition of the 12-
volt battery.
 Have the vehicle fitted with four
snow tires or purchase a set of
tire chains for the front tires.
Ensure that all tires are the same size
and brand, and that chains match the
size of the tires.*
*: Tire chains cannot be mounted on
vehicles with 235/55R19 tires.
Winter driving tips
Carry out the necessary prepa -
rations and inspections before
driving the vehicle in winter.
Always drive the vehicle in a
manner appropriate to the pre -
vailing weather conditions.
Pre-winter preparations
WARNING
■Driving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in a loss of
vehicle control and cause death or serious injury.
●Use tires of the specified size.
●Maintain the recommended level of air pressure.
●Do not drive at speeds in excess of the speed limit or the speed limit
specified for the snow tires being
used.
●Use snow tires on all, not just some
wheels.
■Driving with tire chains (except
235/55R19 tires)
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in the vehi - cle being unable to be driven safely,
and may cause death or serious
injury.
●Do not drive in excess of the speed
limit specified for the tire chains being used, or 50 km/h (30 mph),
whichever is lower.
●Avoid driving on bumpy road sur -
faces or over potholes.
●Avoid sudden acceleration, abrupt
steering, sudden br aking and shift-
ing operations that cause sudden engine braking.
●Slow down sufficiently before enter - ing a curve to ensure that vehicle
control is maintained.
●Do not use LTA (Lane Tracing
Assist) system (if equipped).
NOTICE
■Repairing or replacing snow tires
Request repairs or replacement of snow tires from any authorized
Toyota retailer or Toyota authorized
repairer, or any reliable repairer or legitimate tire retailers.
This is because the removal and
attachment of snow tires affects the operation of the tire pressure warning
valves and transmitters.

4546-1. Using the air conditioning system and defogger
switch to outside air mode if the recircu -
lated air mode is us ed. (It may switch
automatically.)
To defog the winds hield and the side
windows quickly, turn the air flow and
temperature up.
To return to the p revious mode, press
the windshield defogger switch again
when the windshi eld is defogged.
When the windshield defogger switch is
on, the indicator illuminates on the
windshield defogger switch.
■Defogging the rear window
and outside rear view mirrors
Defoggers are us ed to defog the
rear window, and to remove rain -
drops, dew and frost from the out -
side rear view mirrors.
Press the rear window defogger
and outside rear view mirror defog -
gers switch.
The defoggers will automatically turn off
after 15 minutes.
When the rear window defogger and
outside rear view mirror defoggers
switch is on, the indicator illuminates on
the rear window defogger and outside
rear view mirror defoggers switch.
■Blower customization
The fan speed can be adjusted
according to your preference.
1 Press the automatic mode or
airflow mode control switch.
2 Press the blower customization
switch.
3 Each time the blower customi-
zation switch is pressed, the fan
speed changes as follows.
Normal → “ECO” → “FAST”
■Heating
●In HV mode, the gasoline engine may
operate in order to extract heat from the engine coolant via the heater.
●In EV mode, heating is done by a heat pump system.
• When the outside t emperature is low
or it is snowing, compared to conven - tional vehicles, heating may be less
effective and warm air may not come
out. • When the outside heat exchanger is
frosted over, fan speed declines and it
may become harder to heat the inte- rior. However, it is not a malfunction.
In this situat ion, the air temperature
from the outlets may not change even though the set tem perature is raised.
• If frost has formed of the outside heat
exchanger, the heating performance will decline. The frost can be removed
from the outside heat exchanger by
operating the Remote Air Conditioning System before driving ( →P.460).
When frosted over, the heating opera -
tion of the Remote Air Conditioning System starts after defrosting.
• When “AUTO” switch is turned on, the
heating is controlle d optimally. There- fore, the set heating performance may
not be achieved even if the fan speed
setting is increased.
Outside heat exchanger
●In the following situations the gasoline
engine may operate in order to extract heat from the engine coolant via the
heater even in EV mode.
• The outside temperature is approxi -
mately -10°C (14°F) or low
A

495
7
7-2. Maintenance
Maintenance and care
request that a record of maintenance
be kept.
■Does your vehicle need repairs?
Be on the alert for changes in perfor - mance and sounds, a nd visual tip-offs
that indicate service is needed. Some
important clues are:
●Engine missing, stumbling or pinging
●Appreciable loss of power
●Strange engine noises
●A fluid leak under the vehicle (How-
ever, water dripping from the air con - ditioning system after use is normal.)
●Change in exhaust sound (This may indicate a dangerous carbon monox -
ide leak. Drive with the windows open
and have the exhau st system checked immediately.)
●Flat-looking tires, excessive tire squeal when cornering, uneven tire
wear
●Vehicle pulls to one side when driven
straight on a level road
●Strange noises related to suspension
movement
●Loss of brake effectiveness, spongy
feeling brake pedal, pedal almost
touches the floor, vehicle pulls to one
side when braking
●Engine coolant temperature continu -
ally higher than normal ( →P.174)
If you notice any of these clues, take
your vehicle to any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repair er as soon as possi-
ble.
Your vehicle may need adjustment or repair.

4967-3. Do-it-yourself maintenance
7-3.Do-it-yourself maintenance
Do-it-yourself service
precautions
If you perform maintenance by
yourself, be sure to follow the
correct procedure as given in
these sections.
Maintenance
ItemsParts and tools
12-volt battery
condition
( →P.506)
•Grease
• Conventional
wrench (for terminal
clamp bolts)
Engine/power
control unit
coolant level
( →P.503)
• “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 technol -
ogy
“Toyota Super Long
Life Coolant” is pre -
mixed with 50%
coolant and 50%
deionized water.
• Funnel (used only
for adding coolant)
Engine oil level
( →P.501)
• “Toyota Genuine
Motor Oil” or equiva -
lent
• Rag or paper towel
• Funnel (used only
for adding engine
oil)
Fuses
( →P.545)
• Fuse with same
amperage rating as
original
DC/DC Con -
verter air
intake vent
( →P.536)
• Vacuum cleaner,
etc,
• Phillips screwdriver
Light bulbs
( →P.548)
• Bulb with same
number and watt -
age rating as origi -
nal
• Phillips-head screw -
driver
• Flathead screw -
driver
• Wrench
Radiator and
condenser
( →P.504)
⎯
Tire inflation
pressure
( →P.529)
• Tire pressure gauge
• Compressed air
source
Washer fluid
( →P.505)
• Water or washer
fluid containing anti -
freeze (for winter
use)
• Funnel (used only
for adding water or
washer fluid)
WARNING
The engine compartment contains
many mechanisms and fluids that may move suddenly, become hot, or
become electrically energized. To
avoid death or serious injury, observe the following precautions.
ItemsParts and tools