Lexus GS350 (2020 year). Manual in english — page 25

406

6-3. Do-it-yourself maintenance

■

Instructions for checking tire inflation pressure

When checking tire inflation pressure, observe the following:

●

Check only when the tires are cold.

If your vehicle has been parked for at least 3 hours or has not been driven for more than

1 mile or 1.5 km, you will get an accurate cold tire inflation pressure reading.

●

Always use a tire pressure gauge.

It is difficult to judge if a tire is properly inflated based only on its appearance.

●

It is normal for the tire inflation pressure to be higher after driving as heat is generated

in the tire. Do not reduce tire inflation pressure after driving.

●

Never exceed the vehicle capacity weight.

Passengers and luggage weight should be placed so that the vehicle is balanced.

WARNING

■

Proper inflation is critical to save tire performance

Keep your tires properly inflated.

If the tires are not properly inflated, the following conditions may occur which could

lead to an accident resulting in death or serious injury:

●

Excessive wear

●

Uneven wear

●

Poor handling

●

Possibility of blowouts resulting from overheated tires

●

Air leaking from between tire and wheel

●

Wheel deformation and/or tire damage

●

Greater possibility of tire damage while driving (due to road hazards, expansion

joints, sharp edges in the road, etc.)

NOTICE

■

When inspecting and adjusting tire inflation pressure

Be sure to put the tire valve caps back on.

If a valve cap is not installed, dirt or moisture may get into the valve and cause an air

leak, resulting in decreased tire inflation pressure.

407

6-3. Do-it-yourself maintenance

6

Main

tenance an

d care

Wheels

When replacing wheels, care should be taken to ensure that they are equivalent
to those removed in load capacity, diameter, rim width and inset

*

.

Replacement wheels are available at your Lexus dealer.

*

: Conventionally referred to as “offset”.

Lexus does not recommend using the following:

●

Wheels of different sizes or types

●

Used wheels

●

Bent wheels that have been straightened

●

Steel wheels (2WD F SPORT models only)

●

Use only Lexus wheel nuts and wrenches designed for use with your alumi-
num wheels.

●

When rotating, repairing or changing your tires, check that the wheel nuts are
still tight after driving 1000 miles (1600 km).

●

Be careful not to damage the aluminum wheels when using tire chains.

●

Use only Lexus genuine balance weights or equivalent and a plastic or rubber
hammer when balancing your wheels.

■

When replacing wheels

The wheels of your vehicle are equipped with tire pressure warning valves and transmit-

ters that allow the tire pressure warning system to provide advance warning in the event

of a loss in tire inflation pressure. Whenever wheels are replaced, tire pressure warning

valves and transmitters must be installed. (



P. 395)

If a wheel is bent, cracked or heavily corroded, it should be replaced. Other-
wise, the tire may separate from the wheel or cause a loss of handling control.

Wheel selection

Aluminum wheel precautions

408

6-3. Do-it-yourself maintenance

WARNING

■

When replacing wheels

●

Do not use wheels that are a different size from those recommended in the Owner’s

Manual, as this may result in a loss of handling control.

●

Never use an inner tube in a leaking wheel which is designed for a tubeless tire. Doing

so may result in an accident, causing death or serious injury.

●

2WD F SPORT models: Do not install steel wheels.

The wheel contact surface could be damaged, and the wheel could come off while

driving, which could lead to an accident resulting in death or serious injury.

■

Use of defective wheels prohibited

Do not use cracked or deformed wheels.

Doing so could cause the tire to leak air during driving, possibly causing an accident.

NOTICE

■

Replacing tire pressure warning valves and transmitters

●

Because tire repair or replacement may affect the tire pressure warning valves and

transmitters, make sure to have tires serviced by your Lexus dealer or other qualified

service shop. In addition, make sure to purchase your tire pressure warning valves

and transmitters at your Lexus dealer.

●

Ensure that only genuine Lexus wheels are used on your vehicle.

Tire pressure warning valves and transmitters may not work properly with non-genu-

ine wheels.

409

6-3. Do-it-yourself maintenance

6

Main

tenance an

d care

Air conditioning filter

Turn the engine switch off.
Open the glove box. Lift up the side
with the stay, disconnect the stay
tabs and remove the partition by
pulling horizontally.

Press the tabs and remove the filter
cover.

Press the tabs and remove the filter
case.

The air conditioning filter must be changed regularly to maintain air condi-
tioning efficiency.

Removal method

1

2

3

4

410

6-3. Do-it-yourself maintenance

Remove the air conditioning filter
from the filter case and replace it
with a new one.

The “



UP” marks shown on the filter

and the filter case should be pointing up.

■

Changing interval

Inspect and replace the air conditioning filter 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 Supplement”

or “Scheduled Maintenance”.)

■

If air flow from the vents decreases dramatically

The filter may be clogged. Check the filter and replace if necessary.

■

Air conditioning filter with deodorizing function

When fragrances are placed in your vehicle, the deodorizing effect may become signifi-

cantly weakened in a short period.

When an air conditioning odor comes out continuously, replace the air conditioning filter.

5

NOTICE

■

When using the air conditioning system

Make sure that a filter is always installed.

Using the air conditioning system without a filter may cause damage to the system.

411

6-3. Do-it-yourself maintenance

6

Main

tenance an

d care

Electronic key battery

●

Flathead screwdriver

●

Small flathead screwdriver

●

Lithium battery CR2032

Take out the mechanical key.

Remove the cover.

To prevent damage to the key, cover the

tip of the screwdriver with a rag.

Remove the depleted battery.

Insert a new battery with the “+” termi-

nal facing up.

Replace the battery with a new one if it is depleted.

You will need the following items:

Replacing the battery

1

2

3

412

6-3. Do-it-yourself maintenance

■

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 local laws.

■

When 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.

■

If the electronic key battery is depleted

The following symptoms may occur:

●

The smart access system with push-button start and wireless remote control will not

function properly.

●

The operational range will be reduced.

WARNING

■

Removed battery and other parts

These parts are small and if swallowed by a child, they can cause choking. Keep away

from children. Failure to do so could result in death or serious injury.

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 component inside the remote control.

●

Do not bend either of the battery terminals.

413

6-3. Do-it-yourself maintenance

6

Main

tenance an

d care

Checking and replacing fuses

Turn the engine switch off.
Open the fuse box cover.

If any of the electrical components do not operate, a fuse may have blown. If
this happens, check and replace the fuses as necessary.

1

2



Engine compartment (type A fuse
box)



Engine compartment (type B fuse
box)

Push the tab in and lift the lid off.

Push the tab in and lift the lid off.



Driver’s side instrument panel



Passenger’s side instrument panel

Remove the lid.

Remove the lid.

414

6-3. Do-it-yourself maintenance



Trunk
Push the tab in and lift the lid off.

Remove the lid.

Remove the fuse with the pullout
tool.

Only type A fuse can be removed using

the pullout tool.

3

415

6-3. Do-it-yourself maintenance

6

Main

tenance an

d care

Check if the fuse is blown.

Normal fuse
Blown fuse

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 and D:

Contact your Lexus dealer.

4

1

2



Type A



Type B



Type C



Type D

416

6-3. Do-it-yourself maintenance

■

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. 419)

●

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 circuits designed to prevent overload, non-gen-

uine parts or parts not designed for this vehicle may be unusable.

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.

NOTICE

■

Before replacing fuses

Have the cause of electrical overload determined and repaired by your Lexus dealer as

soon as possible.

417

6-3. Do-it-yourself maintenance

6

Main

tenance an

d care

Headlight aim (vehicles with single-beam head-
lights)

Adjustment bolt A
Adjustment bolt B

Make sure the vehicle has a full tank of gasoline and the area around the
headlight is not deformed.
Park the vehicle on level ground.
Sit in the driver’s seat.
Bounce the vehicle several times.

Vertical movement adjusting bolts

1

2

Before checking the headlight aim

1

2
3
4

418

6-3. Do-it-yourself maintenance

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

Remember the turning direction and the

number of turns.

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

If the headlight cannot be adjusted using

this procedure, take the vehicle to your

Lexus dealer to adjust the headlight aim.

Adjusting the headlight aim

1

2

1

419

6-3. Do-it-yourself maintenance

6

Main

tenance an

d care

Light bulbs

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



P. 528)



P. 383

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

You may replace the following bulbs by yourself. The difficulty level of replace-
ment varies depending on the bulb. If necessary bulb replacement seems diffi-
cult to perform, contact your Lexus dealer.
For more information about replacing other light bulbs, contact your Lexus
dealer.

Preparing for light bulb replacement

Removing the engine compartment covers

Bulb locations

1

420

6-3. Do-it-yourself maintenance

■

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

For the left side only: Remove the
bolt and move the washer fluid
filler opening.

Turn the bulb base counterclock-
wise.

Remove the light bulb.

Replacing light bulbs

1

2

3

421

6-3. Do-it-yourself maintenance

6

Main

tenance an

d care

When installing, reverse the steps listed.

After installing the bulb base, secure the cord with the clips and if replacing the left

side bulb, make sure to install the bolt for the washer fluid filler opening in its origi-

nal position.

■

Replacing the following bulbs

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

●

Headlights

●

Parking lights/daytime running lights

●

Front side marker lights

●

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

●

Side turn signal lights

●

Stop/tail lights

●

Stop lights

●

Rear side marker lights

●

Rear turn signal lights

●

Back-up lights

●

High mounted stoplight

●

License plate lights

●

Outer foot lights

4



Right side



Left side