ECU LEXUS ES300h 2022 Owner's Guide

591-4. Hybrid system
1
For safety and security
1-4.Hybrid system
The illustration is an example for explanation and may differ from the actual item.
Gasoline engine
Electric motor (traction motor)
QWhen stopped/during start off
The gasoline engine stops
* when the
vehicle is stopped. During start off, the
electric motor (traction motor) drives
the vehicle. At slow speeds or when
traveling down a gentle slope, the
engine is stopped
* and the electric
motor (traction motor) is used.
When the shift lever is in N, the hybrid
battery (traction battery) is not being charged.
*: When the hybrid battery (traction bat-
tery) requires charging or the engine is
warming up, etc., the gasoline engine will
not automatically stop.
QDuring normal driving
The gasoline engine is predominantly
used. The electric motor (traction
motor) charges the hybrid battery
(traction battery) as necessary.
Hybrid system features
Your vehicle is a hybrid vehicle. It has characteristics different from conven-
tional vehicles. Be sure you are closely familiar with the characteristics of your
vehicle, and operate it with care.
The hybrid system combines the use of a gasoline engine and an electric motor
(traction motor) according to driving conditions, improving fuel efficiency and
reducing exhaust emissions.
System components
A
B

611-4. Hybrid system
1
For safety and security
soft clank will be emitted from the hybrid
battery (traction battery), under the rear
seats, when the hybrid system is started
or stopped.
OSounds from the hybrid system may be
heard when the trunk lid is open.
OSounds may be heard from the transmis-
sion when the gasoline engine starts or
stops, when driving at low speeds, or
during idling.
OEngine sounds may be heard when
accelerating sharply.
OSounds may be heard due to regenera-
tive braking when the brake pedal is
depressed or as the accelerator pedal is
released.
OVibration may be felt when the gasoline
engine starts or stops.
OCooling fan sounds may be heard from
the air intake vent under the rear seat.
QMaintenance, repair, recycling, and dis-
posal
Contact your Lexus dealer regarding main-
tenance, repair, recycling and disposal. Do
not dispose of the vehicle yourself.
QCustomization
Settings (e.g. on/off operation of the EV
indicator) can be changed.
(Customizable features: P.421)
When driving with the gasoline engine
stopped, a sound, which changes in
accordance with the driving speed, will
be played in order to warn people
nearby of the vehicle’s approach. This
sound may be heard inside the vehicle.
The sound will stop when the vehicle
speed exceeds approximately 22 mph
(35 km/h).
QAcoustic Vehicle Alerting System
In the following cases, the Acoustic Vehicle
Alerting System may be difficult for sur-
rounding people to hear.
OIn very noisy areas
OIn the wind or the rain
QIf “Acoustic Vehicle Alerting System
Malfunction Visit your Dealer” is dis-
played on the multi-information display
The system may be malfunctioning. Have
the vehicle inspected by your Lexus dealer.
Acoustic Vehicle Alerting Sys-
tem

631-4. Hybrid system
1
For safety and security
shielding, and therefore emit approxi-
mately the same amount of electromag-
netic waves as conventional gasoline
powered vehicles or home electronic
appliances.
OYour vehicle may cause sound interfer-
ence in some third party-produced radio
parts.
QHybrid battery (traction battery)
The hybrid battery (traction battery) has a
limited service life. The lifespan of the
hybrid battery (traction battery) can change
in accordance with driving style and driving
conditions.
QStarting the hybrid system in an
extremely cold environment (for vehi-
cles sold in except Canada)
When the hybrid battery (traction battery)
is extremely cold (below approximately -
22°F [-30°C]) under the influence of the
outside temperature, it may not be possible
to start the hybrid system. In this case, try to
start the hybrid system again after the tem-
perature of the hybrid battery increases
due to the outside temperature increase
etc.
WARNING
QHigh voltage precautions
This vehicle has high voltage DC and AC
systems as well as a 12-volt system. DC
and AC high voltage is very dangerous
and can cause severe burns and electric
shock that may result in death or serious
injury.
ONever touch, disassemble, remove or
replace the high voltage parts, cables
or their connectors.
OThe hybrid system will become hot
after starting as the system uses high
voltage. Be careful of both the high
voltage and the high temperature, and
always obey the warning labels
attached to the vehicle.
ONever try to open the service plug
access hole located under the rear
seat (right side). The service plug is
used only when the vehicle is serviced
and is subject to high voltage.
QRoad accident cautions
Observe the following precautions to
reduce the risk of death or serious injury:
OPull your vehicle off the road, apply the
parking brake, shift the shift lever to P,
and turn the hybrid system off.
ODo not touch the high voltage parts,
cables and connectors.
OIf electric wires are exposed inside or
outside your vehicle, an electric shock
may occur. Never touch exposed
electric wires.
OIf a fire occurs in the hybrid vehicle,
leave the vehicle 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 danger-
ous.
OIf your vehicle needs to be towed, do
so with front 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.361)
OCarefully inspect the ground under the
vehicle. If you find that liquid has
leaked onto the ground, the fuel sys-
tem may have been damaged. Leave
the vehicle as soon as possible.

651-4. Hybrid system
1
For safety and security
the hybrid battery (traction battery)
may overheat, leading to a reduction in
the hybrid battery (traction battery)
output.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 minimize the risk of electrocu-
tion and fuel leakage. If the emergency
shut off system activates, your vehicle
will not restart. To restart the hybrid
system, contact your Lexus dealer.
A message is automatically displayed
when a malfunction occurs in the
hybrid system or an improper opera-
tion is attempted.
If a warning message is shown on the
multi-information display, read the
message and follow the instructions.
NOTICE
QHybrid battery (traction battery) air
intake vent
OMake sure not to block the air intake
vent with anything, such as a seat
cover, plastic cover, or luggage. If the
vents become blocked, the hybrid bat-
tery (traction battery) input and output
may be restricted, leading to a reduc-
tion in hybrid battery (traction battery)
output and a malfunction.
OWhen dust etc. has accumulated in the
air intake vent, periodically clean it
with a vacuum cleaner to prevent the
vent from clogging.
ODo 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).
ODo not carry large amounts of water
such as water cooler bottles in the
vehicle. If water spills onto the hybrid
battery (traction battery), the battery
may be damaged. Have the vehicle
inspected by your Lexus dealer.
OThere is a filter installed to the air
intake vent. When the filter remains
noticeably dirty even after cleaning the
air intake vent, filter cleaning or
replacement is recommended. For
information regarding filter cleaning or
replacement, refer to P.343.
OIf “Maintenance required for Traction
battery cooling parts See owner’s
manual” is shown on the multi-infor-
mation display, the air intake vent and
filter may be clogged. Refer to P.343
for information on how to clean the air
intake vent.
Emergency shut off system
Hybrid warning message

671-5. Theft deterrent system
1
For safety and security
1-5.Theft deterrent system
The indicator light flashes after the
power switch has been turned off to
indicate that the system is operating.
The indicator light stops flashing after
the power switch has been turned to
ACCESSORY or ON mode to indi-
cate that the system has been can-
celed.
QSystem maintenance
The vehicle has a maintenance-free type
immobilizer system.
QConditions that may cause the system to
malfunction
OIf the grip portion of the key is in contact with a metallic object
OIf the key is in close proximity to or touch-
ing a key registered to the security sys-
tem (key with a built-in transponder chip)
of another vehicleImmobilizer system
The vehicle’s keys have built-in
transponder chips that prevent the
hybrid system 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 pre-
vent vehicle theft but does not guar-
antee absolute security against all
vehicle thefts.
Operating the system
NOTICE
QTo ensure the system operates cor-
rectly
Do not modify or remove the system. If
modified or removed, the proper opera-
tion of the system cannot be guaranteed.

691-5. Theft deterrent system
1
For safety and security
OFor Canada: The doors are unlocked
using the mechanical key.
OThe trunk is unlocked using the mechani-
cal key.
OA person inside the vehicle opens a door,
the trunk or hood, or unlocks the vehicle
using a door lock switch.
OThe 12-volt battery is recharged or
replaced when the vehicle is locked.
( P.393)
QAlarm-operated door lock
In the following cases, depending on the sit-
uation, the door may automatically lock to
prevent improper entry into the vehicle:
OWhen a person remaining in the vehicle unlocks the door and the alarm is acti-
vated.
OWhile the alarm is activated, a person
remaining in the vehicle unlocks the door.
OWhen recharging or replacing the 12-
volt battery
NOTICE
QTo ensure the system operates cor-
rectly
Do not modify or remove the system. If
modified or removed, the proper opera-
tion of the system cannot be guaranteed.

1043-2. Opening, closing and locking the doors and trunk
3-2.Op ening, clo sing and locking the do ors and trunk
QSmart access system with push-
button start
Carry the electronic key to enable this
function.
1 Grip the driver’s door handle to
unlock the door. Holding the
driver’s door handle for approxi-
mately 2 seconds unlocks all the
doors. Grip the passenger’s door
handle to unlock all the doors.
*
Make sure to touch the sensor on the back
of the handle.
The doors cannot be unlocked for 3 sec-
onds after the doors are locked.
*: The door unlock settings can be
changed.
2 Touch the lock sensor (the indenta-
tion on the upper part of the door
handle) to lock all the doors.
Check that the door is securely locked.
QWireless remote control
1 Locks all the doors
Check that the door is securely locked.
2Unlocks all the doors
Pressing the button unlocks the driver’s
door. Pressing the button again within 5
seconds unlocks the other doors.
Press and hold to open the windows and
moon roof.
*
*
: This setting must be customized at your Lexus dealer.
QSwitching the door unlock function
It is possible to set which doors the entry
function unlocks using the wireless remote
control.
1 Turn the power switch off.
2 When the indicator light on the key sur-
face is not on, press and hold ,
or for approximately 5
seconds while pressing and holding
.
The setting changes each time an operation
is performed, as shown below. (When
changing the setting continuously, release
the buttons, wait for at least 5 seconds, and
repeat step 2.)
Doors
Unlocking and locking the doors
from the outside

1053-2. Opening, closing and locking the doors and trunk
3
Before driving
To prevent unintended triggering of the
alarm, unlock the doors using the wireless
remote control and open and close a door
once after the settings have been changed.
(If a door is not opened within 60 seconds
after is pressed, the doors will be
locked again and the alarm will automati-
cally be set.)
In a case that the alarm is triggered, imme-
diately stop the alarm. (P.68)
QImpact detection door lock release sys-
tem
In the event that the vehicle is subject to a
strong impact, all the doors are unlocked.
Depending on the force of the impact or the
type of accident, however, the system may
not operate.
QOperation signals
A buzzer sounds and the emergency flash-
ers flash to indicate that the doors have
been locked/unlocked. (Locked: once;
Unlocked: twice)
A buzzer sounds to indicate that the win-
dows and moon roof are opening.
QSecurity feature
If a door is not opened within approximately 60 seconds after the vehicle is unlocked,
the security feature automatically locks the
vehicle again. (However, depending on the
location of the electronic key, the key may
be detected as being in the vehicle. In this
case, vehicle may be unlocked.)
QWhen the doors cannot be locked by
the lock sensor on the upper part of the
door handle
When the doors cannot be locked even if
the lock sensor on the surface of the door
handle is touched by a finger, touch the lock
sensor with the palm.
If you are wearing gloves, remove them.
QDoor lock buzzer
If an attempt to lock the doors using the
smart access system with push-button start
is made when a door other than the door
you are locking is open, a buzzer sounds
continuously for 5 seconds. Fully close all
the doors, and lock the vehicle once more.
QSetting the alarm
Locking the doors will set the alarm system.
(  P.68)
QConditions affectin g the operation of
the smart access system with push-but-
ton start or wirele ss remote control
 P.117
QIf the smart access system with push-
button start or the wireless remote con-
trol does not operate properly
Use the mechanical key to lock and unlock
the doors. ( P.389)
Replace the key battery with a new one if it
is depleted. ( P.347)
QIf the 12-volt battery is discharged
The doors cannot be locked and unlocked
using the smart access system with push-
button start or wireless remote control.
Multi-information display/BeepUnlocking function
Exterior: Beeps 3 times
Interior: Pings once
Holding the driver’s
door handle unlocks
only the driver’s door.
Holding a passenger’s
door handle unlocks all
the doors.
Exterior: Beeps twice
Interior: Pings onceHolding a door handle
unlocks all the doors.

1093-2. Opening, closing and locking the doors and trunk
3
Before driving
WARNING
ORemove any heavy loads, such as
snow and ice, from the trunk lid before
opening it. Failure to do so may cause
the trunk lid to suddenly shut again
after it is opened.
OWhen opening or closing the trunk lid,
thoroughly check to make sure the
surrounding area is safe.
OIf anyone is in the vicinity, make sure
they are safe and let them know that
the trunk is about to open or close.
OUse caution when opening or closing
the trunk lid in windy weather as it may
move abruptly in strong wind.
OVehicles without power trunk lid: The
trunk lid may suddenly shut if it is not
opened fully. It is more difficult to open
or close the trunk lid on an incline than
on a level surface, so beware of the
trunk lid unexpect edly opening or
closing by itself. Make sure that the
trunk lid is fully open and secure
before using the trunk.
OWhen closing the trunk lid, take extra
care to prevent your fingers etc. from
being caught.
OVehicles without power trunk lid:
When closing the trunk lid, make sure
to press it lightly on its outer surface. If
the trunk grip is used to fully close the
trunk lid, it may result in hands or arms
being caught.
ODo not attach any accessories other
than genuine Lexus parts to the trunk
lid. Such additional weight on the trunk
lid may cause the lid to suddenly shut
again after it is opened.
QTrunk easy closer (vehicles with
power trunk lid)
In the event that the trunk lid is left slightly
open, the trunk easy closer will automati-
cally close it to the fully closed position. It
takes several second s before the trunk
easy closer begins to operate. Be careful
not to catch fingers or anything else in
the trunk lid, as this may cause bone frac-
tures or other serious injuries.
QPower trunk lid (if equipped)
Observe the following precautions when
operating the power trunk lid.
Failure to do so may cause serious injury.
OCheck the safety of the surrounding
area to make sure there are no obsta-
cles or anything that could cause any
of your belongings to get caught.
OIf anyone is in the vicinity, make sure
they are safe and let them know that
the trunk is about to open or close.
OIf the trunk closer switch is pressed
while the trunk lid is opening during
automatic operation, the trunk lid
stops opening. Take extra care when
on an incline, as the trunk lid may open
or close suddenly.

1103-2. Opening, closing and locking the doors and trunk
QTrunk opener switch
Press the trunk opener switch.
WARNING
OOn an incline, the trunk lid may sud-
denly shut after it opens automatically.
Make sure the trunk lid is fully open
and secure before using the trunk.
OIn the following situations, the power
trunk lid may detect an abnormality
and automatic operation may be
stopped. In this case, the trunk lid has
to be operated manually. Take extra
care in this situation, as the stopped
trunk lid may suddenly shut, causing an
accident.
• When the trunk lid contacts an obsta- cle
• When the 12-volt battery voltage sud- denly drops, such as when the power
switch is turned to ON mode or the
hybrid system is started during auto-
matic operation
ODo not attach any accessories other
than genuine Lexus parts to the trunk
lid. The power trunk lid may not oper-
ate, causing itself to malfunction, or the
trunk lid may suddenly shut again after
it is opened.
QHands Free Power Trunk Lid (vehi-
cles with power trunk lid)
Observe the following precautions.
Failure to do so may cause serious injury.
OExhaust gases cause the exhaust pipes
to become quite hot. When operating
the Hands Free Power Trunk Lid, be
careful not to touch the exhaust pipe.
ODo not operate the Hands Free Power
Trunk Lid if there is little space under
the rear bumper.
QJam protection function (vehicles
with power trunk lid)
Observe the following precautions.
Failure to do so may cause serious injury.
ONever use any part of your body to
intentionally activat e the jam protec-
tion function.
OThe jam protection function may not
work if something gets caught just
before the trunk lid fully closes. Be
careful not to catch fingers or anything
else in the trunk lid.
OThe jam protection function may not
work depending on the shape of the
object that is caught. Be careful not to
catch fingers or anything else.
NOTICE
QTo prevent trunk easy closer mal-
functions (vehicles with power trunk
lid)
Do not apply force to the trunk lid while
the trunk easy closer is operating.
QTo prevent damage to the power
trunk lid (vehicles with power trunk
lid)
OMake sure that there is no luggage or
snow on the trunk lid before operating
the power trunk lid. In addition, make
sure that there is no ice between the
trunk lid and frame that prevents
movement of the trunk lid. Operating
the power trunk lid when excessive
load is present on the trunk lid may
cause a malfunction.
ODo not apply excessive force to the
trunk lid while the power trunk lid is
operating.
Opening/closing the trunk