2022 LEXUS ES300h key

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

3486-3. Do-it-yourself maintenance
WARNING
QBattery precautions
Observe the following precautions. Fail-
ure to do so may result in death or seri-
ous injury.
ODo not swallow the battery. Doing so
may cause chemical burns.
OA coin battery or button battery is
used in the electronic key. If a battery
is swallowed, it may cause severe
chemical burns in as little as 2 hours
and may result in death or serious
injury.
OKeep away new and removed batter-
ies from children.
OIf the cover cannot be firmly closed,
stop using the electr onic key and stow
the key in the place where children
cannot reach, and then contact your
Lexus dealer.
OIf you accidentally swallow a battery or
put a battery into a part of your body,
get emergency medical attention
immediately.
QTo prevent battery explosion or leak-
age of flammable liquid or gas
OReplace the battery with a new battery
of the same type. If a wrong type of
battery is used, it may explode.
ODo not expose batteries to extremely
low pressure due to high altitude or
extremely high temperatures.
ODo not burn, break or cut a battery.
NOTICE
QWhen replacing the battery
Use a screwdriver of appropriate size.
Applying excessive force may deform or
damage the cover.
QFor normal operation after replacing
the battery
Observe the following precautions to
prevent accidents:
OAlways work with dry hands.
Moisture may cause the battery to
rust.
ODo not touch or move any other com-
ponent inside the remote control.
ODo not bend either of the battery ter-
minals.

357
7
7
When trouble arises
When trouble arises
7-1. Essential informationEmergency flashers.................. 358
If your vehicle has to be stopped in an emergency ..................... 358
If the vehicle is submerged or water on the road is rising .. 359
7-2. Steps to take in an emergency
If your vehicle needs to be towed......................................................... 361
If you think something is wrong ........................................................ 362
If a warning light turns on or a warning buzzer sounds ....... 364
If a warning message is displayed ........................................................ 374
If you have a flat tire.................. 379
If the hybrid system will not start ........................................................ 386
If you lose your keys ................. 388
If the fuel filler door cannot be opened........................................ 388
If the electronic key does not operate properly .................... 389
If the 12-volt battery is discharged ......................................................... 391
If your vehicle overheats ........ 396
If the vehicle becomes stuck 399

3787-2. Steps to take in an emergency
ment” for the maintenance interval
applicable to your vehicle.
QIf “Maintenance Required Visit Your
Dealer” is displayed
Indicates that all maintenance is required to
correspond to the driven distance on the
maintenance schedule
*.
Comes on approximately 5000 miles
(8000 km) after the message has been
reset. (The indicator will not work properly
unless the message has been reset.) Per-
form the necessary maintenance. Please
reset the message after the maintenance is
performed. ( P.314)
*: Refer to the separate “Scheduled Main-
tenance” or “Owner’s Manual Supple-
ment” for the maintenance interval
applicable to your vehicle.
QIf “Oil Maintenance Required Soon” is
displayed
Indicates that the engine oil should be
scheduled to be changed.
Check the engine oil an d change it if neces-
sary. After changing the engine oil, make
sure to reset the message. ( P.314)
QIf “Oil Maintenance Required” is dis-
played
Indicates that the engine oil should be
changed.
Check and change the engine oil, and oil fil-
ter by your Lexus dealer. After changing
the engine oil, make sure to reset the mes-
sage. ( P.325)
QIf a message that indicates the need for
visiting your Lexus dealer is displayed
The system or part shown on the multi-
information display is malfunctioning. Have
the vehicle inspected by your Lexus dealer
immediately.
QIf a message that indicates the need for
referring to Owner’s Manual is dis-
played
OIf any of the following messages are
shown on the multi-information display,
follow the instructions.
• “Engine Coolant Temp High” ( P.396)
OIf any of the following messages are
shown on the multi-information display, it
may indicate a malfunction. Have the
vehicle inspected by your Lexus dealer
immediately.
• “Access System with Elec. Key Malfunc-
tion”
• “Hybrid system malfunction”
•“Check Engine”
• “Hybrid battery system malfunction”
• “Accelerator system malfunction”
OIf any of the following messages are
shown on the multi-information display, it
may indicate a malfunction. Immediately
stop the vehicle and contact your Lexus
dealer.
•“Braking Power Low”
• “Charging System Malfunction”
• “Oil Pressure Low”
OIf any of the following messages are
shown on the multi-information display,
the vehicle may have run out of fuel. Stop
the vehicle in a safe place and, if the fuel
level is low, refuel the vehicle. ( P.62)
• “Hybrid system stopped”
• “Engine stopped”
OIf “Low Auxiliary Battery” is shown
• When the display goes off after several
seconds
*:
Maintain the hybrid system operation for
more than 15 minutes and charge the 12-
volt battery.
• When the display does not go off:
Start up the hybrid system using the proce-
dures for “If the 12-volt battery is dis-
charged” ( P.391).
*: Displays for about 6 seconds
OIf “Maintenance required for Traction
battery cooling parts” is shown, the filter
may be clogged, the air intake vent may
be blocked, or there may be a gap in the
duct. Therefore, perform the following
correction procedure.
• If the air intake vent and filter of the
hybrid battery (traction battery) are dirty,
perform the procedure on P.343 to
clean them.
• If the warning message is shown when the air intake vent and filter of the hybrid

3807-2. Steps to take in an emergency
Wheel nut wrench
Wheel lock key
* (if equipped)
Jack
Jack handle
Spare tire
*: Documentation relating to the wheel lock key, such as the registration and I.D. card, is inside the glove box.
Location of the spare tire, jack and tools
A
B
C
D
E
WARNING
QUsing the tire jack
Observe the following precautions.
Improper use of the tire jack may cause
the vehicle to suddenly fall off the jack,
leading to death or serious injury.
ODo not use the tire jack for any pur-
pose other than replacing tires or
installing and removing tire chains.
OOnly use the tire jack that comes with
this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do
not use other tire jacks for replacing
tires on this vehicle.
OPut the jack properly in its jack point.
ODo not put any part of your body under
the vehicle while it is supported by the
jack.
ODo not start the hybrid system or drive
the vehicle while the vehicle is sup-
ported by the jack.

3817-2. Steps to take in an emergency
7
When trouble arises
When replacing tires on a vehicle with
wheel lock nuts, use the following pro-
cedures to remove and install the
wheel lock nuts. The wheel lock key is
stored in the tray inside the luggage
compartment. Always return the wheel
lock key to its original position after
use, so that it does not get lost.
QRemoval
For ease of removal, the wheel lock nut
should always be the first one loos-
ened.
1 Place the wheel lock key on top of
the wheel lock nut, turning until the
wheel lock key and wheel lock nut
patterns engage. 2
Place the wheel nut wrench on the
wheel lock key, and while applying
pressure on the wheel lock key,
loosen the wheel lock nut.
QInstallation
For ease of installation, the wheel lock
nut should always be the last one tight-
ened.
1 By hand, Install a wheel lock nut on
the wheel to be installed.
2 Place the wheel lock key on top of
the wheel lock nut, turning until the
wheel lock key and wheel lock nut
patterns engage.
3 Place the wheel nut wrench on the
wheel lock key, and while applying
pressure on the wheel lock key,
tighten the wheel lock nut to the
recommended torque.
1 Open the trunk.
2 Pull the lever upwards when lifting
the luggage mat up.
WARNING
ODo not raise the vehicle while some-
one is inside.
OWhen raising the vehicle, do not put an
object on or under the jack.
ODo not raise the vehicle to a height
greater than that required to replace
the tire.
OUse a jack stand if it is necessary to get
under the vehicle.
OWhen lowering the vehicle, make sure
that there is no-one near the vehicle. If
there are people nearby, warn them
vocally before lowering.
Wheel lock nut (if equipped)
NOTICE
Do not use an impact wrench. Using an
impact wrench may cause permanent
damage to wheel lock nut and wheel lock
key. If in doubt about wheel lock applica-
tion, contact your Lexus dealer.
Taking out the jack

3867-2. Steps to take in an emergency
One of the following may be the cause
of the problem:
The electronic key may not be func-
tioning properly. ( P.390)
 There may not be sufficient fuel in
the vehicle’s tank.
Refuel the vehicle. ( P.174)
 There may be a malfunction in the
immobilizer system. ( P.67)
 There may be a malfunction in the
steering lock system.
 The hybrid system may be malfunc-
tioning due to an electrical problem
such as electronic key battery
depletion or a blown fuse. However,
depending on the type of malfunc-
tion, an interim measure is available
to start the hybrid system.
 For vehicles sold in except Canada:
There is a possibility that the tem-
perature of the hybrid battery (trac-
tion battery) is extremely low
(approximately below -22°F [-
30°C]). ( P.63, 148)
WARNING
QSpeed limit when using the compact
spare tire
Do not drive at speeds in excess of 50
mph (80 km/h) when a compact spare
tire is installed on the vehicle.
The compact spare tire is not designed
for driving at high speeds. Failure to
observe this precaution may lead to an
accident causing death or serious injury.
QAfter using the tools and jack
Before driving, make sure all the tools
and jack are securely in place in their
storage location to reduce the possibility
of personal injury during a collision or
sudden braking.
NOTICE
QBe careful when driving over bumps
with the compact spare tire installed
on the vehicle
The vehicle becomes lower when driving
with the compact spare tire compared to
when driving with standard tires. Be
careful when driving over uneven road
surfaces.
QDriving with tire chains and the com-
pact spare tire
Do not fit tire chains to the compact
spare tire.
Tire chains may damage the vehicle
body and adversely affect driving perfor-
mance.
QWhen replacing the tires
When removing or fitting the wheels,
tires or the tire pressure warning valve
and transmitter, contact your Lexus
dealer as the tire pressure warning valve
and transmitter may be damaged if not
handled correctly.
If the hybrid system will not
start
Reasons for the hybrid system not
starting vary depending on the situ-
ation. Check the following and per-
form the appropriate procedure:
The hybrid system will not start
even though the correct starting
procedure is being followed.
(  P.148)

3887-2. Steps to take in an emergency
Remove the cover inside the trunk and
pull the lever.
If you lose your keys
New genuine mechanical keys can
be made by your Lexus dealer using
another mechanical key and the
key number stamped on your key
number plate. Keep the plate in a
safe place such as your wallet, not in
the vehicle.
NOTICE
QWhen an electronic key is lost
If the electronic key remains lost, the risk
of vehicle theft increases significantly.
Visit your Lexus dealer immediately with
all remaining electr onic keys and the
card key (if equipped) that were pro-
vided with your vehicle.
If the fuel filler door cannot
be opened
If the fuel filler door opener switch
cannot be operated, contact your
Lexus dealer to service the vehicle.
In case where refueling is urgently
necessary, the following proce-
dure can be used to open the fuel
filler door.
Opening the fuel filler door
NOTICE
QWhen opening the fuel filler door
manually
ODo not open the fuel filler door manu-
ally except in an emergency. Fuel may
overflow.
OUsing the lever to open the fuel filler
door may not allow for an adequate
reduction in fuel ta nk pressure before
refueling. To prevent fuel from spilling
out, turn the cap slowly when remov-
ing it.
ODuring refueling, fuel may spill out
from the filler opening due to air being
discharged from inside the fuel tank.
Therefore, fill the fuel tank carefully
and slowly.