2022 TOYOTA RAV4 PLUG-IN HYBRID coolant temperature

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.)
OWhen electricity needed for EV driving is not remaining (when in EV mode or AUTO EV/HV mode)
OWhen the traction battery is almost completely charged (hybrid battery
[traction battery] charge mode)
QWhen switching from EV mode to another mode using the switch
OAfter 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.*
OAfter switching from EV mode to
AUTO EV/HV mode and the power switch is turned off, 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 driving, the system
switches to HV mode.
QHybrid battery (traction battery) charge mode
OThe following may occur to protect the system, etc.• Cannot switch to hybrid battery (trac-
tion battery) charge mode or cannot cancel it• Gasoline engine does not start or
stops even after switching to hybrid battery (traction battery) charge mode
OIf a load to the system is large, such as when the power consumption of the air conditioning system is large or
when the temperature 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.
QWhen in EV mode
In EV mode, EV driving (driving
using only the electric motor)* is
possible. However, 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
QWhen using the hybrid battery (traction battery) charge mode
Observe the following precautions
when using the hybrid battery (trac- tion battery) charge 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.
ODo not stop the vehicle near flam-
mable materials.
ODo not use the hybrid battery (trac-
tion battery) charge mode in a closed area where ventilation is insufficient, such as in a garage or
area with snow buildup.
Control when driving in
each mode

1683-1. 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.
*2: This light illuminates on the multi-
Warning lights
(Red)
Brake system warning
light
*1 (P.508)
(Yellow)
Brake system warning
light
*1 (P.508)
Charging system warn-
ing light
*1 (P.509)
High coolant temperature
warning light
*2 (P.509)
Hybrid system overheat
warning light
*2 (P.509)
Low engine oil pressure
warning light
*2 (P.509)
Malfunction indicator
lamp
*1 (P.510)
SRS warning light
*1
(P.510)
ABS warning light
*1
(P.510)
(Red/yellow)
Electric power steering
system warning light
*1
(P.510)
(Flashes or illu-
minates)
PCS warning light*1 (if
equipped) (P.511)
(Orange)
LTA indicator (if
equipped) (P.511)
Toyota parking assist-
sensor OFF indicator
*3
(P.512)
PKSB OFF indicator*1 (if
equipped) (P.512)
BSM OFF indicator
*1 (if
equipped) (P.513)
RCTA OFF indicator
*1 (if
equipped)
(P.513)
Slip indicator light
*1
(P.513)
Inappropriate pedal oper-
ation warning light
*2
(P.514)
(Flashes)
Brake hold operated indi-
cator
*1 (P.514)
(Flashes)
Parking brake indicator
(P.514)
Tire pressure warning
light
*1 (P.515)
Low fuel level warning
light (P.515)
Driver’s and front pas-
senger’s seat belt
reminder light (P.515)
Rear passengers’ seat
belt reminder lights
(P.516)

1763-1. Instrument cluster
changed suddenly (at the
entrance/exit of a garage, tunnel, etc.)
OWhen “--” 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.
ODisplays the outside temperature
within the range of -40°C (-40°F) to 50°C (122°F).
OWhen the outside temperature is
approximately 3°C (37°F) or lower,
the indicator will flash for approxi-
mately 10 seconds, then stay on.
QLiquid crystal display
 P.178
QCustomization
Settings (e. g. meter display) can be
changed on the screen of the multi-
information display. ( P.184)
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 trip meter.
 When the instrument cluster light
control display is displayed,
pressing and holding the switch
will adjust the brightness of the
instrument cluster lights.
QInstrument cluster brightness adjustment
The instrument cluster brightness levels when the tail lights are on and off can be
WARNING
QThe information display at low temperatures
Allow the interior of the vehicle to
warm up before using 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
QTo prevent damage to the engine and its components
OThe 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.551)
Using the “ODO TRIP”
switch

271
5 5-1. Before driving
Driving
QSudden acceleration/steering
input/cornering
Executing sharp turns when towing
may result in the trailer colliding
with your vehicle. Decelerate well in
advance when approaching turns
and take them slowly and carefully
to avoid sudden braking.
QImportant points regarding
turning
The wheels of the trailer 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.
QImportant 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.
QPassing 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.
QTransmission information
To maintain engine braking effi-
ciency, when using engine braking,
do not use the transmission in D.
(P.277)
QIf 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.551)
QWhen 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.
QBreak-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).
QMaintenance
OMaintenance 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.
ORetighten all bolts securing the hitch-
ing ball and bracket after towing for
approximately 1000 km (600 miles).
QIf trailer sway occurs
One or more factors (crosswinds, pass-
ing vehicles, rough roads, etc.) can
adversely affect handling of your vehicle
and trailer, causing instability.

4086-1. Using the air conditioning system and defogger
switch to outside air mode if the recircu-
lated air mode is used. (It may switch
automatically.)
To defog the windshield and the side
windows quickly, turn the air flow and
temperature up.
To return to the previous mode, press
the windshield defogger switch again
when the windshield is defogged.
When the windshield defogger switch is
on, the indicator illuminates on the
windshield defogger switch.
QDefogging the rear window
and outside rear view mirrors
Defoggers are used 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.
QBlower customization
The fan speed can be adjusted
according to your preference.
1Press the automatic mode or
airflow mode control switch.
2Press the blower customization
switch.
3Each time the blower customi-
zation switch is pressed, the fan
speed changes as follows.
Normal  “ECO”  “FAST”
QHeating
OIn HV mode, the gasoline engine may
operate in order to extract heat from
the engine coolant via the heater.
OIn EV mode, heating is done by a heat
pump system.
• When the outside temperature 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 situation, the air temperature
from the outlets may not change even
though the set temperature 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.414).
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 controlled optimally. There-
fore, the set heating performance may
not be achieved even if the fan speed
setting is increased.
Outside heat exchanger
OIn 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

449
7 7-2. Maintenance
Maintenance and care
request that a record of maintenance
be kept.
QDoes your vehicle need repairs?
Be on the alert for changes in perfor-
mance and sounds, and visual tip-offs
that indicate service is needed. Some
important clues are:
OEngine missing, stumbling or pinging
OAppreciable loss of power
OStrange engine noises
OA fluid leak under the vehicle (How-
ever, water dripping from the air con-
ditioning system after use is normal.)
OChange in exhaust sound (This may
indicate a dangerous carbon monox-
ide leak. Drive with the windows open
and have the exhaust system checked
immediately.)
OFlat-looking tires, excessive tire
squeal when cornering, uneven tire
wear
OVehicle pulls to one side when driven
straight on a level road
OStrange noises related to suspension
movement
OLoss of brake effectiveness, spongy
feeling brake pedal, pedal almost
touches the floor, vehicle pulls to one
side when braking
OEngine coolant temperature continu-
ally higher than normal (P.551)
If you notice any of these clues, take
your vehicle to any authorized Toyota
retailer or Toyota authorized repairer, or
any reliable repairer as soon as possi-
ble.
Your vehicle may need adjustment or
repair.

451
7
7-3. Do-it-yourself maintenance
Maintenance and care
WARNING
QWhen working on the engine compartment
OMake sure that “IGNITION ON” on the multi-information display and the “READY” indicator are both off.
OKeep hands, clothing and tools away from the moving fan.
OBe 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.
ODo not leave anything that may burn easily, such as paper and
rags, in the engine compartment.
ODo not smoke, cause sparks or
expose an open flame to fuel. Fuel fumes are flammable.
OTake care because brake fluid can harm your hands or eyes and dam-age painted surfaces. 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.
QWhen working near the electric
cooling fan or radiator grille
Be sure the power switch is off. With the power switch 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.458)
QSafety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc., from getting in your eyes.
NOTICE
QIf you remove the air cleaner fil-ter
Driving with the air cleaner filter removed may cause excessive engine wear due to dirt in the air.
QIf the fluid level is low or high
It is normal for the brake 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.

4587-3. Do-it-yourself maintenance
“LOW” line
If the level is on or below the “LOW”
line, add coolant up to the “FULL” line.
( P.551)
QPower 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.553)
QCoolant 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.
QIf 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
QWhen 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
QWhen 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.
QIf you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or
paint.
Checking the radiator and
condenser