2023 TOYOTA RAV4 HYBRID ECU

731-4. Hybrid system
1
For safety and security
*: This function can only be used in
the mainland U.S.A. It cannot be
used in other states and territo-
ries, including Alaska and Hawaii.
This system operates based on
the driving situation and traffic
information to enhance fuel
economy.
For details about Predictive effi-
cient drive, refer to “MULTIME-
DIA OWNER’S MANUAL”.
■Predictive deceleration sup-
port
 When the vehicle approaches
to predictive deceleration sup-
port points registered in the
navigation system, the refer-
ence operation range ( ) of
the ECO Accelerator Guid-
ance ( P.107) on the multi-
information display will be
turned off to encourage the
driver to reduce excessive
acceleration.
With 7-inch display:
With 12.3-inch display:
 The engine braking force will
be increased according to the
driving conditions to more effi-
ciently charge the hybrid bat-
tery (traction battery) after the
accelerator pedal is released.
■Predictive SOC* control
The following types of control
are performed based on data
such as road and traffic informa-
tion during route guidance by
the navigation system to help
ensure that the vehicle effi-
ciently uses electricity.
 When there is a long downhill
slope along the route, the sys-
tem reduces the hybrid bat-
tery (traction battery) level
before reaching the slope to
help ensure charging capacity
for regenerative braking while
traveling downhill.
 When traffic congestion is
predicted along the route, the
system helps ensure a certain
battery level before reaching
congested roads to reduce
the frequency of starting the
engine to charge the hybrid
battery (traction battery) due
Predictive efficient drive
(if equipped)
*
A

751-4. Hybrid system
1
For safety and security
The illustration is an example for explanation and may differ from the actual
item.
Warning label
Service plug
Rear electric motor (traction motor)
Hybrid battery (traction battery)
High voltage cables (orange)
Front electric motor (traction motor)
Power control unit
Air conditioning compressor
Hybrid system precautions
Take care when handling the hybrid system, as it is a high
voltage system (about 650V at maximum) as well as contains
parts that become extremely hot when the hybrid system is
operating. Obey the warning labels attached to the vehicle.
System components
A
B
C
D
E
F
G
H

771-4. Hybrid system
1
For safety and security
WARNING
●If electric wires are exposed
inside or outside your vehicle,
an electric shock may occur.
Never touch exposed electric
wires.
●If a fire occurs in the Hybrid
Electric Vehicle, leave the vehi-
cle as soon as possible. Never
use a fire extinguisher that is
not meant for electric fires.
Using even a small amount of
water may be dangerous.
●If your vehicle needs to be
towed, do so with four wheels
raised. If the wheels connected
to the electric motor (traction
motor) are on the ground when
towing, the motor may continue
to generate electricity. This may
cause a fire. (P.451)
●Carefully inspect the ground
under the vehicle. If you find
that liquid has leaked onto the
ground, the fuel system may
have been damaged. Leave the
vehicle as soon as possible.
AXAH54L models*
●If a fluid leak occurs, do not
touch the fluid as it may be
strong alkaline electrolyte from
the hybrid battery (traction bat-
tery). If it comes into contact
with your skin or eyes, wash it
off immediately with a large
amount of water or, if possible,
boric acid solution. Seek imme-
diate medical attention.
*: The model code is indicated on
the Certification Regulation
Label. ( P.496)
AXAL54L models*
●Do not touch the battery if liquid
is leaking from or adhering to it.
If electrolyte (carbonic-based
organic electrolyte) from the
hybrid battery (traction battery)
comes into contact with the
eyes or skin, it could cause
blindness or skin wounds. In the
unlikely event that it comes into
contact with the eyes or skin,
wash it off immediately with a
large amount of water, and seek
immediate medical attention.
●If electrolyte is leaking from the
hybrid battery (traction battery),
do not approac h the vehicle.
Even in the unlikely event that
the hybrid battery (traction bat-
tery) is damaged, the internal
construction of the battery will
prevent a large amount of elec-
trolyte from leaking out. How-
ever, any electrolyte that does
leak out will give off a vapor.
This vapor is an irritant to skin
and eyes and could cause acute
poisoning if inhaled.
●Do not bring burning or high-
temperature items close to the
electrolyte.
The electrolyte may ignite and
cause a fire.
*: The model code is indicated on
the Certificatio n Regulation
Label. ( P.496)
■Hybrid battery (traction bat-
tery)
●AXAL54L models*: Your vehi-
cle contains a sealed lithium-ion
battery.
*: The model code is indicated on
the Certificatio n Regulation
Label. ( P.496)

791-4. Hybrid system
1
For safety and security
When a certain level of impact is
detected by the impact sensor,
the emergency shut off system
blocks the high voltage current
and stops the fuel pump to mini-
mize the risk of electrocution
and fuel leakage. If the emer-
gency shut off system activates,
your vehicle will not restart. To
restart the hybrid system, con-
tact your Toyota dealer.
A message is automatically dis-
played when a malfunction
occurs in the hybrid system or
an improper operation is
attempted.If a warning message is shown
on the multi-information display,
read the message and follow the
instructions.
■If a warning light comes on, a
warning message
is displayed,
or the 12-volt battery is discon-
nected
The hybrid system may not start. In
this case, try to start the system
again. If the “READY” indicator does
not come on, contact your Toyota
dealer.
NOTICE
■Hybrid battery (traction bat-
tery) air intake vent
●Make sure not to block the air
intake vent with anything, such
as a seat cover, luggage, or car-
pet. The input/output of the
hybrid battery (traction battery)
may be restricted, leading to a
reduction in hybrid battery (trac-
tion battery) output and a mal-
function.
●Periodically clean the air intake
vent to prevent it from clogging.
(  P.426)
●Do not get water or foreign
materials in the air intake vent
as this may cause a short circuit
and damage the hybrid battery
(traction battery).
Emergency shut off sys-
tem
Hybrid warning message

801-5. Theft deterrent system
1-5.Theft deterrent system
Vehicles without smart key
system
The indicator light flashes after
the key has been removed from
the power switch to indicate that
the system is operating.
The indicator light goes off after
the registered key has been
inserted into the power switch to
indicate that the system has
been canceled.
Vehicles with smart key sys-
tem
The indicator light flashes after
the power switch has been
turned to OFF to indicate that
the system is operating.
The indicator light goes off after
the power switch has been
turned to ACC or ON to indicate
that the system has been can-
celed.
■System maintenance
The vehicle has a maintenance-free
type immobilizer system.
■Conditions that may cause the
system to malfunction
●If the grip portion of the key is in
contact with a metallic object
●If the key is in close proximity to or
touching a key to the security sys-
tem (key with a built-in transpon-
der chip) of another vehicle
Immobilizer system
The vehicle’s keys have
built-in transponder chips
that prevent the hybrid sys-
tem from starting if a key
has not been previously
registered in the vehicle’s
on-board computer.
Never leave the keys inside
the vehicle when you leave
the vehicle.
This system is designed to
help prevent vehicle theft but
does not guarantee absolute
security against all vehicle
thefts.
Operating the system

811-5. Theft deterrent system
1
For safety and security
*: If equipped
NOTICE
■To ensure the system oper-
ates correctly
Do not modify or remove the sys-
tem. If modified or removed, the
proper operation of the system
cannot be guaranteed.
Alarm*
The alarm uses light and
sound to give an alert when
an intrusion is detected.
The alarm is triggered in the
following situations when
the alarm is set:
 Vehicles without smart key
system: A locked door is
unlocked or opened in any
way other than using the
wireless remote control or
key. (The doors will lock
again automatically.)
Vehicles with smart key
system: A locked door is
unlocked or opened in any
way other than using the
entry function, wireless
remote control or mechani-
cal key. (The doors will lock
again automatically.)
For Canada: A locked door
is unlocked or opened in
any way other than using
the entry function (if
equipped) or wireless
remote control. (The doors
will lock again automati-
cally.)
The hood is opened.

821-5. Theft deterrent system
■Items to check before lock-
ing the vehicle
To prevent unexpected trigger-
ing of the alarm and vehicle
theft, make sure of the following:
 Nobody is in the vehicle.
 The side windows and moon
roof (if equipped) or pan-
oramic moon roof (if
equipped) are closed before
the alarm is set.
 No valuables or other per-
sonal items are left in the
vehicle.
■Setting
Close the doors and hood, and
lock all the doors. The system
will be set automatically after 30
seconds.
Except for Canada, the alarm
can also be set using the
mechanical key.
The security indicator changes from
being on to flashing when the sys-
tem is set.
■Canceling or stopping
Do one of the following to deac-
tivate or stop the alarm:
Except for Canada
 Unlock the doors.
 Turn the power switch to ACC
or ON, or start the hybrid sys-
tem. (The alarm will be deacti-
vated or stopped after a few
seconds.)
For Canada
 Unlock the doors using the
entry function (if equipped) or
wireless remote control.
 Start the hybrid system. (The
alarm will be deactivated or
stopped after a few seconds.)
■System maintenance
The vehicle has a maintenance-free
type alarm system.
■Triggering of the alarm
The alarm may be triggered in the
following situations:
(Stopping the alarm deactivates the
alarm system.)
●For Canada: The doors are
unlocked using the key.
●A person inside the vehicle opens
a door or hood, or unlocks the
vehicle using an inside lock but-
ton.
Setting/canceling/stop-
ping the alarm system

831-5. Theft deterrent system
1
For safety and security
●The 12-volt battery is recharged or
replaced when the vehicle is
locked. (P.485)
■Alarm-operated door lock
In the following cases, depending
on the situation, th e door may auto-
matically lock to p revent improper
entry into the vehicle:
●When a person remaining in the
vehicle unlocks the door and the
alarm is activated.
●While the alarm is activated, a
person remaining in the vehicle
unlocks the door.
●When recharging or replacing the
12-volt battery.
■Customization (for Canada)
The alarm can be set to deactivate
when the key (vehicles without
smart key system) or mechanical
key (vehicles with smart key sys-
tem) is used to unlock. (Customiz-
able features: P.519)
NOTICE
■To ensure the system oper-
ates correctly
Do not modify or remove the sys-
tem. If modified or removed, the
proper operation of the system
cannot be guaranteed.