2022 LEXUS RX450h Owners Manual

3836-3. Do-it-yourself maintenance
6
Maintenance and care
1Turn the power switch off.
2 Open the glove box. Slide off the
damper.
3 Push in the glove box on the vehi-
cle’s outer side to disconnect the
claws. Then pull out the glove box
and disconnect the lower claws. 4
Remove the cover.
5 Unlock the filter cover ( ), pull the
filter cover out of the claws ( ),
and remove the filter cover.
6 Remove the filter case.
There may be foreign objects on top of the
air conditioning filter.
7Remove the air conditioning filter
from the filter case and replace it
with a new one.
The “ UP” marks shown on the filter
Air conditioning filter
The air conditioning filter must be
changed regularly to maintain air
conditioning efficiency.
Removing the air conditioning
filter
A
B

3846-3. Do-it-yourself maintenance
and the filter case should be pointing up.
■Checking interval
Inspect and replace the air conditioning fil-
ter according to the maintenance schedule.
In dusty areas or area s with heavy traffic
flow, early replacement may be required.
(For scheduled mainte nance information,
please refer to the “Owner’s Manual Sup-
plement” or “Scheduled Maintenance”.)
■If air flow from th e vents decreases dra-
matically
The filter may be clogged. Check the filter
and replace if necessary.
■Air conditioning filter with deodorizing
function
When fragrances are placed in your vehi-
cle, the deodorizing effect may become
significantly weakened in a short period.
When an air conditioning odor comes out
continuously, replace the air conditioning
filter.
NOTICE
■When using the air conditioning sys-
tem
Make sure that a filter is always installed.
Using the air conditioning system without
a filter may cause damage to the system.
■To 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.

3856-3. Do-it-yourself maintenance
6
Maintenance and care
1Change the rest position of the
windshield wipers to the service
position using the wiper lever and
then lift a windshield wiper.
( P.207)
2 While pressing and holding the
wiper blade lock release button,
remove the wiper blade.
When performing this operation, make
sure to hold the hook portion of the wiper
arm securely.
Hook portion
3 While disengaging the cap lock,
using a tool such as a flathead
screwdriver if necessary, remove
the wiper insert.
Hold the cap on the end of the wiper insert
when removing the wiper insert. (The cap
is integrated into the wiper insert.)
If using a screwdriver, make sure to wrap its tip with tape to protect the wiper blade.
Cap lock
4 Install a new wiper insert.
Make sure to push the wiper insert firmly
until the cap lock is engaged.
After installation, check that the cap lock is
locked securely.
5 Install the wiper blade to the wiper
arm.
Make sure to push the wiper blade until it is
locked.
When performing this operation, make
sure to hold the hook portion of the wiper
arm securely.
After installation, check that the wiper
blade is locked securely.
6After replacing the wiper inserts,
place the windshield wipers on the
windshield and lower them to the
retracted position. ( P.207)
Do not drive the vehicle with the wind-
shield wipers lifted.
Windshield wiper inserts
Replacing a windshield wiper
insert
A
A

3866-3. Do-it-yourself maintenance
■Replacing the rear wiper insert
Have the rear wiper insert replaced by your
Lexus dealer.
■Handling of the wind shield wiper blades
and inserts
Improper handling of the windshield wiper
blades and inserts may cause them to be
damaged. If it is difficult to follow the wiper
blade and insert replacement procedure
precisely, contact your Lexus dealer.
■If the electronic key battery is depleted
The following symptoms may occur:
●The smart access system with push-but-
ton start and wireless remote control will
not function properly.
●The operational rang e will be reduced.
Flathead screwdriver
 Lithium battery CR2032
■Use a CR2032 lithium battery
●Batteries can be purc hased at your Lexus
dealer, local electrical appliance shops or
camera stores.
●Replace only with the same or equivalent
type recommended by the manufacturer.
●Dispose of used batteries according to
the local laws.
1 Take out the mechanical key.
2 Remove the cover.
To prevent damage to the key, cover the tip
Electronic key battery
Replace the battery with a new one
if it is depleted.
You will need the following items:
Replacing the battery

3876-3. Do-it-yourself maintenance
6
Maintenance and care
of the flathead screwdriver with a tape.
3Remove the depleted battery.
When removing the cover, the electronic
key module may stick to the cover and the
battery may not be visible. In this case,
remove the electronic key module in order
to remove the battery.
Insert a new battery with the “+” terminal
facing up.
WARNING
■Battery precautions
Observe the following precautions.
Failure to do so may result in death or
serious injury.
●Do not swallow the battery. Doing so
may cause chemical burns.
●A coin battery or button battery is
used in the electronic key. If a battery is
swallowed, it may cause severe chemi-
cal burns in as little as 2 hours and may
result in death or serious injury.
●Keep away new and removed batteries
from children.
●If the cover cannot be firmly closed,
stop using the electronic key and stow
the key in the place where children
cannot reach, and then contact your
Lexus dealer.
●If you accidentally swallow a battery or
put a battery into a part of your body,
get emergency medical attention
immediately.
■To prevent battery explosion or leak-
age of flammable liquid or gas
●Replace the battery with a new battery
of the same type. If a wrong type of
battery is used, it may explode.
●Do not expose batteries to extremely
low pressure due to high altitude or
extremely high temperatures.
●Do not burn, break or cut a battery.
NOTICE
■For normal operation after replacing
the battery
Observe the following precautions to
prevent accidents:
●Always work with dry hands.
Moisture may cause the battery to
rust.
●Do not touch or move any other com-
ponent inside the remote control.
●Do not bend either of the battery ter-
minals.

3886-3. Do-it-yourself maintenance
1Turn the power switch off.
2 Open the fuse box cover.
Engine compartment
Push the tab in and lift the lid off.
Driver’s side instrument panel
Remove the lid.
Luggage compartment (type A fuse
box)
RX450h:
Remove the 12-volt battery cover.
( P.370) RX450hL:
Remove the deck board and side auxiliary
box cover and 12-volt battery cover.
(
P.370)
Luggage compartment (type B fuse
box)
RX450h:
Remove the terminal cover.
RX450hL:
Remove the terminal cover.
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

3896-3. Do-it-yourself maintenance
6
Maintenance and care
3Remove the fuse with the pullout
tool.
Only some fuses can be removed
using the pullout tool.
4 Check if the fuse is blown.
Normal fuse
Blown fuse
Replace the blown fuse with a new fuse of
an appropriate amperage rating. The
amperage rating can be found on the fuse
box lid.
Many types of fuse are used on this vehicle.
This illustration shows a common type of
fuse used on this vehicle.
■After a fuse is replaced
●If the lights do not turn on even after the
fuse has been replaced, a bulb may need
replacement. ( P.392)
●If the replaced fuse blows again, have the
vehicle inspected by your Lexus dealer.
■If there is an overload in a circuit
The fuses are designed to blow, protecting
the wiring harness from damage.
■When replacing light bulbs
Lexus recommends that you use genuine
Lexus products designed for this vehicle.
Because certain bulbs are connected to cir-
cuits designed to prevent overload,
non-genuine parts or parts not designed for
this vehicle may be unusable.
A
B
WARNING
■To 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.
●Never use a fuse of a higher amperage
rating than that indicated, or use any
other object in place of a fuse.
●Always use a genuine Lexus fuse or
equivalent.
Never replace a fuse with a wire, even
as a temporary fix.
●Do not modify the fuses or fuse boxes.
■Fuse box near the power control unit
Never check or replace the fuses as
there are high voltage parts and wiring
near the fuse box.
Doing so may cause electric shock,
resulting in death or serious injury.

3906-3. Do-it-yourself maintenance
Vehicles without single-beam head-
lightsAdjustment bolt A
Adjustment bolt B
Vehicles with single-beam head-
lightsAdjustment bolt A
Adjustment bolt B
1 Make sure the vehicle has a full
tank of gasoline and the area
around the headlight is not
deformed.
NOTICE
■Before replacing fuses
Have the cause of electrical overload
determined and repaired by your Lexus
dealer as soon as possible.
Headlight aim
Vertical movement adjusting
bolts
Before checking the headlight
aim
A
B
A
B