key battery LEXUS ES300h 2022 User Guide

1183-2. Opening, closing and locking the doors and trunk
effective range (detection areas), the sys-
tem may not operate properly in the fol-
lowing cases:
• The electronic key is too close to the win- dow or outside door handle, near the
ground, or in a high place when the doors
are locked or unlocked.
• The electronic key is near the ground or in a high place, or too close to the center
of the rear bumper when the trunk is
opened.
• The electronic key is on the instrument
panel, rear package tray or floor, or in the
door pockets or glove box when the
hybrid system is started or power switch
modes are changed.
ODo not leave the electronic key on top of
the instrument panel or near the door
pockets when exiting the vehicle.
Depending on the radio wave reception
conditions, it may be detected by the
antenna outside the cabin and the doors
will become lockable from the outside,
possibly trapping the electronic key
inside the vehicle.
OAs long as the electronic key is within the
effective range, the doors may be locked
or unlocked by anyone. However, only
the doors detecting the electronic key
can be used to unlock the vehicle.
OEven if the electronic key is not inside the
vehicle, it may be possible to start the
hybrid system if the electronic key is near
the window.
OThe doors may unlock or lock if a large
amount of water splashes on the door
handle, such as in the rain or in a car
wash, when the electronic key is within
the effective range. (The doors will auto-
matically be locked after approximately
60 seconds if the doors are not opened
and closed.)
OIf the wireless remote control is used to
lock the doors when the electronic key is
near the vehicle, there is a possibility that
the door may not be unlocked by the
entry function. (Use the wireless remote
control to unlock the doors.)
OTouching the door lock sensor while
wearing gloves may delay or prevent
lock operation. Remove the gloves and
touch the lock sensor again.
OWhen the lock operation is performed
using the lock sensor, recognition signals
will be shown up to two consecutive
times. After this, no recognition signals
will be given.
OUnlocking the vehicle may take more
time if another electronic key is within the
effective range.
OIf the door handle becomes wet while the
electronic key is within the effective
range, the door may lock and unlock
repeatedly. In this case, follow the follow-
ing correction procedures to wash the
vehicle:
• Place the electronic key in a location 6 ft. (2 m) or more away from the vehicle.
(Take care to ensure that the key is not
stolen.)
• Set the electronic key to battery-saving
mode to disable the smart access system
with push-button start. ( P.117)
OIf the electronic key is inside the vehicle
and a door handle becomes wet during a
car wash, a message may be shown on
the multi-information display and a
buzzer will sound outside the vehicle. To
turn off the alarm, lock all the doors.
OThe lock sensor may not work properly if
it comes into contact with ice, snow, mud,
etc.
Clean the lock sensor and attempt to
operate it again.
OA sudden approach to the effective
range or door handle may prevent the
doors from being unlocked. In this case,
return the door handle to the original
position and check that the doors unlock
before pulling the door handle again.
QWhen the vehicle is not driven for
extended periods
OTo prevent theft of the vehicle, do not
leave the electronic key within 6 ft. (2 m)
of the vehicle.
OThe smart access system with push-but-
ton start can be deactivated in advance.
OBattery-saving mode can reduce the
power consumption of electronic keys.
( P.117)

1484-2. Driving procedures
4-2 . D riving p roce dures
1Press the parking brake switch to
check that the parking brake is set.
( P.159)
Parking brake indicator will come on.
2 Check that the shift lever is in P.
3 Firmly depress the brake pedal.
and a message will be displayed on
the multi-information display.
If it is not displayed, the hybrid system can-
not be started.
4 Press the power switch shortly and
firmly.
When operating the power switch, one
short, firm press is enough. It is not neces-
sary to press and hold the switch.
If the “READY” indicator turns on, the
hybrid system will operate normally.
Continue depressing the brake pedal until
the “READY” indicator is illuminated.
The hybrid system can be started from any
power switch mode.
5Check that the “READY” indicator
is illuminated.
The vehicle will not move when the
“READY” indicator is off.
QPower switch illumination
According to the situation, the power
switch illumination operates as follows.
OWhen a door is opened, or the power
switch mode is changed from ACCES-
SORY or ON mode to off, the power
switch illumination slowly blinks.
OWhen depressing the brake pedal with
carrying the electronic key on your per-
son, the power switch illumination rapidly
blinks.
OWhen the power switch is in ACCES-
SORY or ON mode, the power switch
illumination illuminates.
QIf the hybrid system does not start
OThe immobilizer system may not have
been deactivated. ( P.67)
Contact your Lexus dealer.
OIf a message related to start-up is shown
on the multi-information display, read the
message and follow the instructions.
OIf the door is unlocked with the mechani-
cal key, the hybrid system cannot be
started using the smart access system
with push-button start. Refer to P.390 to
start the hybrid system. However, if the
electronic key is carried inside the vehi-
cle and the doors are locked ( P.106),
the hybrid system can be started.
QWhen the ambient temperature is low,
such as during winter driving conditions
(for vehicles sold in except Canada)
OWhen starting the hybrid system, the
flashing time of the “READY” indicator
may be long. Leave the vehicle as it is
until the “READY” indicator is steady on,
as steady means the vehicle is able to
move.
OWhen the hybrid battery (traction bat-
tery) is extremely cold (below approxi-
mately -22°F [-30°C]) under the
influence of the outside temperature, it
may not be possible to start the hybrid
Power (ignition) switch
Performing the following opera-
tions when carrying the electronic
key on your person starts the hybrid
system or changes power switch
modes.
Starting the hybrid system

1494-2. Driving procedures
4
Driving
system. In this case, try to start the hybrid
system again after the temperature of the
hybrid battery increases due to the out-
side temperature increase etc.
QSounds and vibrations specific to a
hybrid vehicle
 P.60
QIf the 12-volt battery is discharged
The hybrid system cannot be started using
the smart access system with push-button
start. Refer to P.391 to restart the hybrid
system.
QElectronic key battery depletion
 P.100
QConditions affecting operation
 P.117
QNotes for the entry function
 P.117
QSteering lock function
OAfter turning the power switch off and
opening and closing the doors, the steer-
ing wheel will be locked due to the steer-
ing lock function. Operating the power
switch again automatically cancels the
steering lock.
OWhen the steering lock cannot be
released, “Push Power Switch while
Turning Steering Wheel in Either Direc-
tion” will be displayed on the multi-infor-
mation display.
Check that the shift lever is set in P. Press
the power switch shortly and firmly while
turning the steering wh eel left and right.
OTo prevent the steering lock motor from
overheating, the motor may be sus-
pended if the hybrid system is turned on
and off repeatedly in a short period of
time. In this case, refrain from operating
the power switch. After about 10 sec- onds, the steering lock motor will resume
functioning.
QIf there is a malfunction in the smart
access system with push-button start
If “Access System with Elec. Key Malfunc-
tion See Owner’s Manual” is displayed on
the multi-information display, the system
may be malfunctioning. Have the vehicle
inspected by your Lexus dealer immedi-
ately.
QIf the “READY” indicator does not
come on
In the event that the “READY” indicator
does not come on even after performing
the proper procedures for starting the vehi-
cle, contact your Lexus dealer immediately.
QIf the hybrid system is malfunctioning
 P.65
QElectronic key battery
 P.347
QOperation of the power switch
OIf the switch is not pressed shortly and
firmly, the power switch mode may not
change or the hybrid system may not
start.
OIf attempting to restart the hybrid system
immediately after turning the power
switch off, the hybrid system may not start
in some cases. After turning the power
switch off, please wait a few seconds
before restarting the hybrid system.
QCustomization
If the smart access system with push-button
start has been deactivated in a customized
setting, refer to P.421.
WARNING
QWhen starting the hybrid system
Always start the hybrid system while sit-
ting in the driver’s seat. Do not depress
the accelerator pedal while starting the
hybrid system under any circumstances.
Doing so may cause an accident result-
ing in death or serious injury.

1644-3. Operating the lights and wipers
QAutomatic light off system
OWhen the headlights come on: The head-
lights and tail lights turn off 30 seconds
after the driver’s door is opened and
closed if the power switch is turned to
ACCESSORY mode or turned off. (The
lights turn off immediately if on
the key is pressed after all the doors are
locked.)
OWhen only the tail lights come on: The tail
lights turn off automatically if the power
switch is turned to ACCESSORY mode
or turned off and the driver’s door is
opened.
For the U.S.A.: To turn the lights on again,
turn the power switch to ON mode, or turn
the light switch off once and then back to
or .
For Canada: To turn the lights on again, turn
the power switch to ON mode, or turn the
light switch to position once and then
back to or .
QLight reminder buzzer
A buzzer sounds when the power switch is
turned off or turned to ACCESSORY
mode and the driver’s door is opened while
the lights are turned on.
QAutomatic headlight leveling system (if
equipped)
The level of the headlights is automatically
adjusted according to the number of pas-
sengers and the loading condition of the
vehicle to ensure that the headlights do not
interfere with other road users.
QWindshield wiper linked headlight illu-
mination
When driving during daytime with the
headlight switch turned to , if the wind-
shield wipers are used, the headlights will
turn on automatically after several seconds
to help enhance the visibility of your vehicle.
Q12-volt battery-saving function
In order to prevent the 12-volt battery of the
vehicle from discharging, if the headlights
and/or tail lights are on when the power
switch is turned off the 12-volt battery sav-
ing function will operate and automatically
turn off all the lights after approximately 20
minutes.
When the power switch is turned to ON
mode, the 12-volt battery-saving function
will be disabled.
When any of the following are performed,
the 12-volt battery-saving function is can-
celed once and then reactivated. All the
lights will turn off automatically 20 minutes
after the 12-volt battery-saving function has
been reactivated:
OWhen the headlight switch is operated
OWhen a door is opened or closed
QWelcome light illumination control
The parking lights, tail lights and license
plate lights automatically turn on at night
when the doors are unlocked using the
entry function or wireless remote control if
the light switch is in the position.
QIf “Headlight System Malfunction Visit
Your Dealer” is displayed
 P.377
QCustomization
Settings (e.g. light sensor sensitivity) can be
changed.
(Customizable features:  P.421)

2835-4. Using the interior lights
5
Interior features
QTurning the door position on
Press the door-linked interior light
switch
The lights are turned on and off according
to whether the doors are opened/closed.
QTurning the lights on/off
Turns the lights on/off (touch the light)
The rear interior light turns on/off
together with the front interior light.
When a door is opened while the door
position is on, the lights turn on.
QTurning the lights on/off
Front
Turns the lights on/off (touch the light)
Rear
Turns the lights on/off
QIlluminated entry system
The lights automatically turn on/off accord-
ing to the power switch mode, the presence
of the electronic key, whether the doors are
locked/unlocked, and whether the doors
are open/closed.
QTo prevent the 12-volt battery from
being discharged
If the interior lights remain on when the
power switch is turned off, the lights will go
off automatically after 20 minutes.
QWhen front interior light or front per-
sonal lights do not respond as normal
OWhen water, dirt, etc., have adhered to
the lens surface
OWhen operated with a wet hand
OWhen wearing gloves, etc.
QThe interior lights will turn on automati-
cally when
If any of the SRS airbags deploy (inflate) or
in the event of a strong rear impact, the
interior lights will turn on automatically.
Operating the interior lights
Operating the personal lights

2955-6. Using the other interior features
5
Interior features
Fold down the armrest for use.An assist grip installed on the ceiling
can be used to support your body
while sitting on the seat.
QRear sunshade
The rear sunshade can be raised and
lowered by operating the button
shown below.
Press the switch. (Raise/lower)
NOTICE
OWhen other wireless keys (that emit
radio waves) are being used nearby
In addition, excluding the above-men-
tioned, when the charger does not per-
form normally or the operation indicator
light is flashing continuously, it is consid-
ered that the wireless charger is malfunc-
tioning. Contact your Lexus dealer.
QTo prevent failure or damage to data
ODo not bring magnetic cards, such as
credit cards, or magnetic recording
media, etc., close to the charger while
charging, otherwise, data may disap-
pear under the influence of magne-
tism. Also, do not bring precision
instruments such as wrist watches, etc.,
close to the charger, as such objects
may break.
ODo not leave portable devices in the
cabin. The temperature inside the
cabin may become high, when under
the sun, and cause damage to the
device.
QTo prevent 12-volt battery discharge
When the hybrid system is stopped, do
not use the wireless charger for a long
time.
Armrest
NOTICE
QTo prevent damage to the armrest
Do not apply too much load on the arm-
rest.
Assist grips
WARNING
QAssist grips
Do not use the assist grip when getting in
or out of the vehicle or rising from your
seat.
NOTICE
QTo prevent damage to the assist grip
Do not hang any heavy object or put a
heavy load on the assist grip.
Rear sunshade (if
equipped)/rear door sunshades
(if equipped)

307
6
6
Maintenance and care
Maintenance and care
6-1. Maintenance and careCleaning and protecting the vehi-cle exterior ................................ 308
Cleaning and protecting the vehi- cle interior ................................... 311
6-2. Maintenance Maintenance requirements ... 314
General maintenance .............. 315
Emission inspection and mainte- nance (I/M) programs .......... 318
6-3. Do-it-yourself maintenance Do-it-yourself service precautions......................................................... 319
Hood................................................ 321
Positioning a floor jack ............. 321
Engine compartment............... 323
12-volt battery............................. 328
Tires ................................................ 330
Tire inflation pressure .............. 338
Wheels........................................... 340
Air conditioning filter............... 342
Cleaning the hybrid battery (trac- tion battery) air intake vent and
filter .............................................. 343
Electronic key battery ............. 347
Checking and replacing fuses ........................................................ 349
Headlight aim............................... 351
Light bulbs .................................... 352

3086-1. Maintenance and care
6-1.Maintenance and care
Working from top to bottom, liber-
ally apply water to the vehicle body,
wheel wells and underside of the
vehicle to remove any dirt and dust.
 Wash the vehicle body using a
sponge or soft cloth, such as a
chamois.
 For hard-to-remove marks, use car
wash soap and rinse thoroughly with
water.
 Wipe away any water.
 Wax the vehicle when the water-
proof coating deteriorates.
If water does not bead on a clean surface,
apply wax when the vehicle body is cool.
QSelf-restoring coat
The vehicle body has a self-restoring coat-
ing that is resistant to small surface
scratches caused in a car wash etc.
OThe coating lasts for 5 to 8 years from
when the vehicle is delivered from the
plant.
OThe restoration time differs depending on
the depth of the scratch and outside tem-
perature.
The restoration time may become
shorter when the coating is warmed by
applying warm water.
ODeep scratches caused by keys, coins,
etc. cannot be restored.
ODo not use wax that contain abrasives.
QAutomatic car washes
OBefore washing the vehicle:
• Fold the mirrors
• Turn off the power trunk lid (if equipped)
Start washing from the front of the vehicle.
Make sure to extend the mirrors before
driving.
OBrushes used in automatic car washes
may scratch the vehicle surface, parts
(wheel, etc.) and harm your vehicle’s
paint.
ORear spoiler may not be washable in
some automatic car washes. There may
also be an increased risk of damage to
vehicle.
QHigh pressure car washes
As water may enter the cabin, do not bring
the nozzle tip near the gaps around the
doors or perimeter of windows, or spray
these areas continuously.
QNotes for the smart access system with
push-button start
If the door handle becomes wet while the
electronic key is within the effective range,
the door may lock and unlock repeatedly. In
that case, follow the following correction
procedures to wash the vehicle:
OPlace the key in a position 6 ft. (2 m) or
more separate from the vehicle while the
vehicle is being washed. (Take care to
ensure that the key is not stolen.)
OSet the electronic key to battery-saving
mode to disable the smart access system
with push-button start. ( P.117)
QWheels and wheel ornaments
ORemove any dirt immediately by using a
neutral detergent.
OWash detergent off with water immedi-
ately after use.
OTo protect the paint from damage, make
sure to observe the following precau-
tions.
• Do not use acidic, alkaline or abrasive detergent
• Do not use hard brushes
• Do not use detergent on the wheels when they are hot, such as after driving or
Cleaning and protecting the
vehicle exterior
Perform cleaning in a manner
appropriate to each component
and its material.
Cleaning instructions

3286-3. Do-it-yourself maintenance
The 12-volt battery is located on the
right-hand side of the trunk.
QBefore recharging
When recharging, the 12-volt battery pro-
duces hydrogen gas which is flammable
and explosive. Therefore, observe the fol-
lowing precautions before recharging:
OIf recharging with the 12-volt battery
installed on the vehicle, be sure to dis-
connect the ground cable.
OMake sure the power switch on the char-
ger is off when connecting and discon-
necting the charger cables to the 12-volt
battery.
QAfter recharging/reconnecting the 12-
volt battery
OThe hybrid system may not start.
Follow the procedure below to initialize the
system.
1 Shift the shift lever to P.
2 Open and close any of the doors.
3 Restart the hybrid system.
OUnlocking the doors using the smart
access system with push-button start may
not be possible immediately after recon-
necting the 12-volt battery. If this hap-
pens, use the wireless remote control or
the mechanical key to lock/unlock the
doors.
OStart the hybrid system with the power
switch in ACCESSORY mode. The
NOTICE
QDo not use any fluid other than
washer fluid
Do not use soapy water or engine anti-
freeze instead of washer fluid.
Doing so may cause streaking on the
vehicle’s painted surfaces, as well as
damaging the pump leading to problems
of the washer fluid not spraying.
QDiluting washer fluid
Dilute washer fluid with water as neces-
sary.
Refer to the freezing temperatures listed
on the label of the washer fluid bottle.
12-volt battery
Location

3476-3. Do-it-yourself maintenance
6
Maintenance and care
QIf the electronic key battery is depleted
The following symptoms may occur:
OThe smart access system with push-but-
ton start and wireless remote control will
not function properly.
OThe operational range will be reduced.
QWhen the card key battery needs to be
replaced (if equipped)
The battery for the card key is available only
at Lexus dealers. Your Lexus dealer can
replace the battery for you.
Prepare the following before replacing
the battery:
 Flathead screwdriver
 Small flathead screwdriver
 Lithium battery CR2032
QUse a CR2032 lithium battery
OBatteries can be purchased at your Lexus
dealer, local electrical appliance shops or
camera stores.
OReplace only with the same or equivalent
type recommended by the manufacturer.
ODispose of used batteries according to
the local laws.
1 Take out the mechanical key.
2 Remove the cover.
To prevent damage to the key, wrap the tip
of the screwdriver with tape.
3Remove the depleted battery.
Insert a new battery with the “+” terminal
facing up.
Electronic key battery
Replace the battery with a new one
if it is depleted.
Items to prepare
Replacing the battery