engine coolant TOYOTA RAV4 PLUG-IN HYBRID 2023 Owners Manual

882-1. Plug-in hybrid system
hybrid system operation mode cannot
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 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.
■Hybrid battery (traction battery) charge mode
●The 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
●If 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.
■When 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
WARNING
■When 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.
●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 as in a garage or area with snow buildup.
Control when driving in
each mode

183
3 3-1. Instrument cluster
Vehicle status information and indicators
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-
Warning lights
(Red)
Brake system warning light*1
(P.534)
(Yellow)
Brake system warning light*1
(P.534)
Charging system warning
light
*1 (P.535)
High coolant temperature
warning light
*2 (P.535)
Hybrid system overheat
warning light
*2 (P.535)
Low engine oil pressure
warning light
*2 (P.535)
Malfunction indicator lamp
*1
(P.536)
SRS warning light
*1
(P.536)
ABS warning light
*1
(P.536)
(Red)
Electric power steering sys-
tem warning light
*1 (P.536)
(Yellow)
Electric power steering sys-
tem warning light
*1 (P.536)
(Flashes or
illuminates)
PCS warning light*1 (if
equipped) (P.537)
(Orange)
LTA indicator (if equipped)
(P.537)
Toyota parking assist-sensor
OFF indicator
*3 (P.538)
PKSB OFF indicator
*1 (if
equipped) (P.538)
BSM OFF indicator
*1 (if
equipped) (P.539)
RCTA OFF indicator
*1 (if
equipped)
(P.539)
Slip indicator light
*1 (P.539)
Inappropriate pedal operation
warning light
*2 (P.540)
(Flashes)
Brake hold operated indica-
tor
*1 (P.540)
(Flashes)
Parking brake indicator
(P.540)
Tire pressure warning light
*1
(P.541)
Low fuel level warning light
(P.541)
Driver’s and front passen-
ger’s seat belt reminder light
(P.541)
Rear passengers’ seat belt
reminder lights
*4 (P.542)
Rear passengers’ seat
belt reminder lights
(P.542)

191
3
3-1. Instrument cluster
Vehicle status information and indicators
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 outside temperature
within the range of -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.200
■Customization
Settings (e. g. meter display) can be
changed on the screen of the multi-
information display. ( P.206)
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.
■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 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
■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.578)
Using the “ODO TRIP”
switch

1983-1. Instrument cluster
( P.103)
■Manually updating the fuel gauge
and possible driving range
The fuel gauge and the possible driving range are linked. If the displays of the
fuel gauge and possible driving range do not update after adding a small amount of fuel, the displays can be
updated by performing the following pro- cedure.
1 Stop the vehicle on a level surface.
2 Press the “ODO TRIP” switch to change the odometer and trip meter
display to odometer.
3 Turn the power switch off.
4 While pressing and holding the “ODO TRIP” switch, turn the power switch to ON.
5 Continue to hold the “ODO TRIP”
switch for approximately 5 seconds, and then release it once the odome-ter begins flashing.
Updating is complete once the odometer flashes for approximately 5 seconds and then the display returns to normal.
■Outside temperature display
●Displays the outside temperature within the range of -40°C (-40°F) to
60°C (140°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.
●In the following situations, the correct
outside temperature may not be dis- played, or the display may take longer than normal to change:
• When stopped, or driving at low speeds (less than 12 mph [20 km/h])• When the outside temperature has
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 your Toyota dealer.
■Liquid crystal display
 P.211
■Free/Open Source Software Infor- mation
This product contains Free/Open
Source Software (FOSS). The license information and/or the source code of such FOSS can be found at the follow-
ing URL.
https://www.denso.com/global/en/ opensource/meter/toyota/
■Customization
The gauges and meters can be custom-
ized on of the multi-information dis-
play. ( P.211)
WARNING
■The 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 information dis-play monitor may respond slowly, and
display changes may be delayed.
For example, there is a lag between
the driver’s shifting and the new gear number appearing on the display. This lag could cause the driver to
downshift again, causing rapid and excessive engine braking and possi-bly 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 dis-
play. In this case, immediately stop the vehicle in a safe place, and check the engine after it has cooled com-
pletely. ( P.578)

3085-1. Before driving
is especially true when driving on
wet or slippery road surfaces.
■Sudden 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.
■Important 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.
■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.315)
■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.578)
■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 factors (crosswinds, pass-
ing vehicles, rough roads, etc.) can

4225-6. Driving tips
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 braking 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.

4326-1. 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.
■Defogging 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 and outside
rear view mirror defoggers switch.
The defoggers will automatically turn off
after 15 minutes.
When the rear window and outside rear
view mirror defoggers switch is on, the
indicator illuminates on the rear window
and outside rear view mirror defoggers
switch.
■Blower 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”
■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 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.438).
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
●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

473
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, and 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 exhaust 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.187, 193)
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.

4747-3. Do-it-yourself maintenance
7-3.Do-it-y ours elf main ten ance
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.484)
•Grease
• Conventional
wrench (for terminal
clamp bolts)
Engine/power
control unit
coolant level
( P.481)
• “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.479)
• “Toyota Genuine
Motor Oil” or equiva-
lent
• Rag or paper towel
• Funnel (used only
for adding engine
oil)
Fuses
( P.513)
• Fuse with same
amperage rating as
original
DC/DC Con-
verter air
intake vent
( P.504)
• Vacuum cleaner,
etc,
• Phillips screwdriver
Light bulbs
( P.516)
• Bulb with same
number and watt-
age rating as origi-
nal
• Phillips-head screw-
driver
• Flathead screw-
driver
•Wrench
Radiator and
condenser
( P.482)

Tire inflation
pressure
( P.498)
• Tire pressure gauge
• Compressed air
source
Washer fluid
( P.483)
• 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

475
7
7-3. Do-it-yourself maintenance
Maintenance and care
WARNING
■When working on the engine compartment
●Make sure that “IGNITION ON” on the multi-information display and the “READY” indicator 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 anything that may burn easily, such as paper and
rags, in the engine compartment.
●Do not smoke, cause sparks or
expose an open flame to fuel. Fuel fumes are flammable.
●Take 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.
■When 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.482)
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc., from getting in your eyes.
NOTICE
■If 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.
■If 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.