2022 LEXUS ES300h Owners Manual

3436-3. Do-it-yourself maintenance
6
Maintenance and care
filter.
Remove the dust from the air intake
vent with a vacuum cleaner, etc.
Make sure to only use a vacuum to suck
out dust and clogs. Attempting to blow out
dust and clogs using an airgun, etc. may
push it into the air intake vent. (P.346)
If dust and clogs cannot be completely
removed with the air intake vent cover
installed, remove the cover and clean
NOTICE
QWhen using the air conditioning sys-
tem
OMake sure that a filter is always
installed.
Using the air conditioning system with-
out a filter may cause damage to the
system.
OThe filter is replaceable.
When cleaning the filter, do not clean
with water or an air gun.
QTo prevent damage to the filter cover
When moving the filter cover in the
direction of arrow to release the fitting,
pay attention not to apply excessive
force to the claws. Otherwise, the claws
may be damaged.
Cleaning the hybrid battery
(traction battery) air intake
vent and filter
To prevent the fuel economy from
being affected, visually inspect the
hybrid battery (traction battery) air
intake vent periodically for dust and
clogs. If it is dusty or clogged or if
“Maintenance required for Trac-
tion battery cooling parts See
owner’s manual” is displayed on the
multi-information display, clean the
air intake vent using the following
procedures:
Cleaning the air intake vent
If dust and clogs cannot be com-
pletely removed

3446-3. Do-it-yourself maintenance
the filter.
1Turn the power switch off.
2 Using a Phillips screwdriver,
remove the clip.
3 Remove the air intake vent cover.
1 Pull the cover as shown in the illus-
tration to disengage the 7 claws,
starting from the claw in the upper
right corner.
2 Pull the cover toward the front of
the vehicle to remove it. 4
Remove the air intake vent filter.
1 Disengage the 3 claws as shown in
the illustration.
2 Remove the filter from the cover.
5 Remove the dust and clogs from
the filter using a vacuum cleaner,
etc.
Make sure to also remove the dust and
clogs from the inside of the air intake vent
cover.

3456-3. Do-it-yourself maintenance
6
Maintenance and care
6Reinstall the filter to the cover.
1 Engage the filter to the 2 claws as
shown in the illustration.
2 Engage the 3 claws to install the fil-
ter.
Make sure that the filter is not crooked or
deformed when installing it.
7Install the air intake vent cover.
1 Insert the tab of the cover as shown
in the illustration.
2 Push the cover to engage the 7
claws. 8
Using a Phillips screwdriver, install
the clip.
QScheduled maintenance of the air
intake vent is necessary when
In some situations such as when the vehicle
is used frequently or in heavy traffic or dusty
areas, the air intake vent may need to be
cleaned more regularly.
For details, refer to “Owner’s Manual Sup-
plement” or “Scheduled Maintenance”.
QCleaning the air intake vent
ODust in the air intake vent may interfere
with the cooling of the hybrid battery
(traction battery). If charging/discharg-
ing of the hybrid battery (traction battery)
becomes limited, the distance that the
vehicle can be driven using the electric
motor (traction motor) may be reduced
and the fuel economy may be reduced.
Inspect and clean the air intake vent peri-
odically.
OImproper handling of the air intake vent
cover and filter may re sult in damage to
them. If you have any concerns about
cleaning the filter, contact your Lexus
dealer.
QIf “Maintenance required for Traction
battery cooling parts See owner’s man-
ual” is displayed on the multi-informa-
tion display
OIf this warning message is displayed on
the multi-information display, remove the
air intake vent cover and clean the filter.
(  P.343)
OAfter cleaning the air intake vent, start
the hybrid system and check that the
warning message is no longer displayed.
After the hybrid system is started, it may

3466-3. Do-it-yourself maintenance
be necessary to drive the vehicle up to
approximately 20 minutes before the
warning message disappears. If the warn-
ing message does not disappear after
driving for appropriately 20 minutes,
have the vehicle inspected by your Lexus
dealer.
WARNING
QWhen cleaning the air intake vent
ODo not use water or other liquids to
clean the air intake vent. If water is
applied to the hybrid battery (traction
battery) or other components, a mal-
function or fire may occur.
OBefore cleaning the air intake vent,
make sure to turn the power switch off
to stop the hybrid system.
QWhen removing the air intake vent
cover
Do not touch the service plug located
near the air intake vent. ( P.63)
NOTICE
QWhen cleaning the air intake vent
When cleaning the air intake vent, make
sure to only use a vacuum to suck out
dust and clogs. If a compressed air blow
gun, etc. is used to blow out dust and
clogs, the dust or clogs may be pushed
into the air intake vent, which may affect
the performance of the hybrid battery
(traction battery) and cause a malfunc-
tion.
QTo prevent damage to the vehicle
ODo not allow water or foreign matter
to enter the air intake vent when the
cover is removed.
OCarefully handle the removed filter so
that it will not be damage.
If the filter is damaged, have it
replaced with a new filter by your
Lexus dealer.
OMake sure to reinstall the filter and
cover to their original positions after
cleaning.
ODo not install anything to the air intake
vent other than the exclusive filter for
this vehicle or use the vehicle without
the filter installed.
QIf “Maintenance required for Trac-
tion battery cooling parts See
owner’s manual” is displayed on the
multi-information display
If the vehicle is continuously driven with
the warning message (indicating that
charging/discharging of the hybrid bat-
tery (traction battery) may become lim-
ited) displayed, the hybrid battery
(traction battery) may malfunction.

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.

3496-3. Do-it-yourself maintenance
6
Maintenance and care
1Turn the power switch off.
2 Open the Fuse box cover.
Engine compartment: type A fuse
box
Push the tab in and lift the lid off.
Engine compartment: type B fuse
box
Push the tab in and lift the lid off.
Driver’s side instrument panel
Push the tab in and remove the lid. Make sure to push the tab in during
removal or installation.
3
Remove the fuse with the pullout
tool.
Only type A fuses can be removed using
the pullout tool.
4Check if the fuse is blown.
Type A and B:
Replace the blown fuse with a new fuse of
an appropriate amperage rating. The
amperage rating can be found on the fuse
box lid.
Type C:
Contact your Lexus dealer.
Type A
Checking and replacing
fuses
If any of the electrical components
do not operate, a fuse may have
blown. If this happens, check and
replace the fuses as necessary.
Checking and replacing fuses

3506-3. Do-it-yourself maintenance
Normal fuse
Blown fuse
Type BNormal fuse
Blown fuse
Type CNormal fuse
Blown fuse
QAfter a fuse is replaced
OWhen installing the lid, make sure that the
tab is installed securely.
OIf the lights do not turn on even after the
fuse has been replaced, a bulb may need
replacement. ( P.352)
OIf the replaced fuse blows again, have the
vehicle inspected by your Lexus dealer.
QIf there is an overload in a circuit
The fuses are designed to blow, protecting
the wiring harness from damage.
A
B
A
B
A
B
WARNING
QTo prevent system breakdowns and
vehicle fire
Observe the following precautions.
Failure to do so may cause damage to
the vehicle, and possibly a fire or injury.
ONever use a fuse of a higher amperage
rating than that indicated, or use any
other object in place of a fuse.
OAlways use a genuine Lexus fuse or
equivalent.
Never replace a fuse with a wire, even
as a temporary fix.
ODo not modify the fuses or fuse boxes.
NOTICE
QBefore replacing fuses
Have the cause of electrical overload
determined and repaired by your Lexus
dealer as soon as possible.