Lexus RX450h (2022 year). Manual in english — page 23

383

6-3. Do-it-yourself maintenance

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1

Turn 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.

7

Remove 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

384

6-3. 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 areas with heavy traffic

flow, early replacement may be required.

(For scheduled maintenance information,

please refer to the “Owner’s Manual Sup-

plement” or “Scheduled Maintenance”.)

■

If air flow from the 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.

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6-3. Do-it-yourself maintenance

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1

Change 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.

6

After 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

386

6-3. Do-it-yourself maintenance

■

Replacing the rear wiper insert

Have the rear wiper insert replaced by your

Lexus dealer.

■

Handling of the windshield 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 range will be reduced.



Flathead screwdriver



Lithium battery CR2032

■

Use a CR2032 lithium battery

●

Batteries can be purchased 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

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6-3. Do-it-yourself maintenance

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of the flathead screwdriver with a tape.

3

Remove 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.

388

6-3. Do-it-yourself maintenance

1

Turn 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

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6-3. Do-it-yourself maintenance

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3

Remove 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.

390

6-3. Do-it-yourself maintenance



Vehicles without single-beam head-
lights

Adjustment bolt A
Adjustment bolt B



Vehicles with single-beam head-
lights

Adjustment 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

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6-3. Do-it-yourself maintenance

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2

Park the vehicle on level ground.

3

Sit in the driver’s seat.

4

Bounce the vehicle several times.

1

Using a phillips-head screwdriver,
turn bolt A in either direction.

Remember the turning direction and the

number of turns.



Vehicles without single-beam head-
lights



Vehicles with single-beam head-
lights

2

Turn bolt B the same number of
turns and in the same direction as
step

1

.

If the headlight cannot be adjusted using

this procedure, take the vehicle to your

Lexus dealer to adjust the headlight aim.



Vehicles without single-beam head-
lights



Vehicles with single-beam head-
lights

Adjusting the headlight aim

392

6-3. Do-it-yourself maintenance

Check the wattage of the light bulb to
be replaced. (



P.460)



P.123

■

Front

Front side marker light (vehicles
with single-beam headlights)
Front turn signal light (vehicles with
single-beam headlights)

Light bulbs

You may replace the following bulbs
by yourself. The difficulty level of
replacement varies depending on
the bulb. If necessary bulb replace-
ment seems difficult to perform,
contact your Lexus dealer.

For more information about replac-
ing other light bulbs, contact your
Lexus dealer.

Preparing for light bulb replace-
ment

Canceling the power back door
system

Bulb locations

A

B

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6-3. Do-it-yourself maintenance

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Rear

Back-up light (bulb type)
Rear turn signal light (bulb type)

■

Replacing the following bulbs

If any of the lights listed below has
burnt out, have it replaced by your
Lexus dealer.



Headlight



Parking lights and daytime running
lights



Front turn signal lights (vehicles
without single-beam headlights)



Front side marker lights (vehicles
without single-beam headlights)



Front fog lights (if equipped)



Cornering lights (if equipped)



Side turn signal lights



Stop/tail lights



Back-up lights (LED type)



Rear turn signal light (LED type)



Rear side marker lights



High mounted stoplight



License plate lights



Outer foot lights

■

LED Lights

The lights other than the front turn signal

lights (vehicles with single-beam head-

lights), front side marker lights (vehicles

with single-beam headlights), rear turn sig-

nal lights (bulb type) and back-up lights

(bulb type) each consist of a number of

LEDs. If any of the LEDs burn out, take your

vehicle to your Lexus dealer to have the

light replaced.

■

Condensation build-up on the inside of

the lens

Temporary condensation build-up on the

inside of the headlight lens does not indi-

cate a malfunction. Contact your Lexus

dealer for more information in the following

situations:

●

Large drops of water have built up on the

inside of the lens.

●

Water has built up inside the headlight.

■

When replacing light bulbs



P.389

■

Front side marker lights (vehicles
with single-beam headlights)

1

To ensure enough space to per-
form work, turn the steering wheel
to rotate the front wheel away from
the bulb to be replaced.
Remove the 3 fender liner clips.

Turn the steering wheel to the left when

replacing the right side light bulb, and turn

the steering wheel to the right when

replacing the left side light bulb.
When removing a fender liner clip, use a

A
B

Replacing light bulbs

394

6-3. Do-it-yourself maintenance

flathead screwdriver to pry the center por-

tion out and then remove the whole clip.

2

Pull back the fender liner until the
connector is visible.

3

Partially remove the fender liner
and turn the bulb base counter-
clockwise and remove it.

4

Remove the light bulb.

5

Install a new light bulb and then
install the bulb base to the light unit
by inserting it and turning it clock-
wise.

After installing the bulb base, wiggle it

lightly to make sure it is securely installed

and turn the lights on to visually check that

there is no light leaking from between the

bulb base and light unit.

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6-3. Do-it-yourself maintenance

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6

Reinstall the fender liner and install
the 3 fender liner clips.

■

Front turn signal lights (vehicles
with single-beam headlights)

1

Removing the engine compartment
cover.

1

Push the center of the clip.

2

Remove the clip.

2

For the right side only: Remove the
bolt of washer fluid inlet.

3

For the right side only: Open the
cap, remove the bracket , and
move the washer fluid inlet.

A

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6-3. Do-it-yourself maintenance

4

Turn the bulb base counterclock-
wise and remove it.

5

Remove the light bulb.

6

Install a new light bulb and then
install the bulb base to the light unit
by inserting it and turning it clock-
wise.

After installing the bulb base, wiggle it

lightly to make sure it is securely installed

and turn the lights on to visually check that

there is no light leaking from between the

bulb base and light unit.

7

For the right side only: Install the
bracket and close the cap.

8

For the right side only: Fix the
washer fluid inlet.

1

Align the tab position and install
washer fluid inlet.

2

Fasten the bolt.

A

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6-3. Do-it-yourself maintenance

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9

Install the engine compartment
cover.

1

Push up center portion

2

Insert

3

Press

■

Rear turn signal lights (bulb type)

1

Open the back door and apply pro-
tective tape to the vehicle body
around the taillight.

Use masking tape, etc. Do not use duct

tape, as it may leave residue or damage the

paint when removed.

2

Using a flathead screwdriver,
remove the cover.

To prevent scratching the vehicle, wrap the

tip of the flathead screwdriver with a cloth,

etc.

3

Remove the 2 screws.

4

Remove the taillight unit.

1

Attach 2 long pieces of masking

398

6-3. Do-it-yourself maintenance

tape to the taillight unit and fold the
excess in half.

2

Hold the folded portion and pull it
toward the rear of the vehicle to
remove the light unit.

5

Turn the bulb base counterclock-
wise and remove it.

6

Remove the light bulb.

7

Install a new light bulb and then
install the bulb base to the light unit
by inserting it and turning it clock-
wise.

After installing the bulb base, wiggle it

lightly to make sure it is securely installed

and turn on the rear turn signal lights to

visually check that there is no light leaking

from between the bulb base and light unit.

8

Install the light unit.

Align the tabs and push the light unit-

toward the front of the vehicle to install it.

9

Install the 2 screws.