Lexus RC350 (2022 year). Manual in english - page 15

• SAE J1703 or

FMVSS No.116 DOT
3 brake fluid

• SAE J1704 or

FMVSS No.116 DOT
4 brake fluid

• Rag or paper towel
• Funnel (used only for

adding brake fluid)

Engine/inter-
cooler coolant
level(



• “Toyota Super Long

Life Coolant” or a
similar high quality
ethylene gly-
col-based non-sili-
cate, non-amine,
non-nitrite and
non-borate coolant
with long-life hybrid
organic acid tech-
nology

• For the U.S.A.:“Toy-

ota Super Long Life
Coolant” is
pre-mixed with 50%
coolant and 50%
deionized water.

• For Canada:“Toyota

Super Long Life
Coolant” is
pre-mixed with 55%
coolant and 45%
deionized water.

• Funnel (used only for

adding coolant)

Engine oil level
(

• “Toyota Genuine

Motor Oil” or equiv-
alent

• Rag or paper towel
• Funnel (used only for

adding engine oil)

Fuses (



P.276)

• Fuse with same

amperage rating as
original

Items

Parts and tools

252

6-3. Do-it-yourself maintenance

Light bulbs
(



P.279)

• Bulb with same num-

ber and wattage rat-
ing as original

• Phillips-head screw-

driver

• Flathead screw-

driver

• Wrench

Radiator, con-
denser and inter-
cooler radiator
(





Tire inflation pres-
sure (



P.271)

• Tire pressure gauge
• Compressed air

source

Washer fluid
(



P.262)

• Water or washer

fluid containing anti-
freeze (for winter
use)

• Funnel (used only for

adding water or
washer fluid)

WARNING

The engine compartment contains many

mechanisms and fluids that may move

suddenly, become hot, or become elec-

trically energized. To avoid death or seri-

ous injury, observe the following

precautions.

■

When working on the engine com-

partment

●

Keep hands, clothing and tools away

from the moving fans and engine drive

belt.

●

Be careful not to touch the engine,

radiator, exhaust manifold, etc. right

after driving as they may be hot. Oil

and other fluids may also be hot.

Items

Parts and tools

●

Do not leave anything that may burn

easily, such as paper and rags, in the

engine compartment.

●

Do not smoke, cause sparks or expose

an open flame to fuel or the battery.

Fuel and battery fumes are flammable.

●

Be extremely cautious when working

on the battery. It contains poisonous

and corrosive sulfuric acid.

■

When working near the electric cool-

ing fans or radiator grille

Be sure the engine switch is off.
With the engine switch in IGNITION

ON mode, the electric cooling fans may

automatically start to run if the air condi-

tioning is on and/or the coolant tempera-

ture is high. (

■

Safety glasses

Wear safety glasses to prevent flying or

falling material, fluid spray, etc. from get-

ting in your eyes.

NOTICE

■

If you remove the air cleaner filter

Driving with the air cleaner filter

removed may cause excessive engine

wear due to dirt in the air.

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Pull the hood lock release lever.

The hood will pop up slightly.

Pull up the auxiliary catch lever and
lift the hood.

■

If a symbol indicating the hood opens is

shown on the multi-information display

P.88

■

Front



2WD models

Hood

Opening the hood

WARNING

■

Pre-driving check

Check that the hood is fully closed and

locked.
If the hood is not locked properly, it may

open while the vehicle is in motion and

cause an accident, which may result in

death or serious injury.

Positioning a floor jack

When using a floor jack, follow the
instructions in the manual provided
with the jack and perform the oper-
ation safely.

When raising your vehicle with a
floor jack, position the jack cor-
rectly. Improper placement may
damage your vehicle or cause
injury.

Location of the jack point

255

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

RC350/RC300 AWD

Fuse boxes (

P.276)

Battery (



P.261)

Engine oil level dipstick (

Engine coolant reservoir (



Engine oil filler cap (



Brake fluid reservoir (



Washer fluid tank (



P.262)

Electric cooling fans
Condenser (



Radiator (



Engine compartment

Components

A
B
C
D

E
F

256

6-3. Do-it-yourself maintenance



RC300

Fuse boxes (

P.276)

Battery (



P.261)

Engine oil level dipstick (

Engine oil filler cap (



Engine coolant reservoir (



Brake fluid reservoir (



Washer fluid tank (



P.262)

Electric cooling fans
Condenser (



Intercooler radiator (



Radiator (



Intercooler coolant reservoir (

With the engine at operating tempera-
ture and turned off, check the oil level
on the dipstick.

■

Checking the engine oil

Park the vehicle on level ground.
After warming up the engine and
turning it off, wait more than 5 min-
utes for the oil to drain back into the
bottom of the engine.

A
B
C
D

E
F

Checking and adding the engine
oil

257

6-3. Do-it-yourself maintenance

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Holding a rag under the end, pull
the dipstick out.



RC350/RC300 AWD



RC300

Wipe the dipstick clean.

Reinsert the dipstick fully.

Holding a rag under the end, pull
the dipstick out and check the oil
level.

Low
Normal
Excessive

The shape of the dipstick may differ

depending on the type of vehicle or

engine.

Wipe the dipstick and reinsert it
fully.

■

Checking the oil type and prepar-
ing the item needed

Make sure to check the oil type and
prepare the items needed before add-
ing oil.



Engine oil selection

P.329



Oil quantity (Low



Full)

1.6 qt. (1.5 L, 1.3 Imp. qt.)



Item
Clean funnel

■

Adding engine oil

If the oil level is below or near the low
level mark, add engine oil of the same
type as that already in the engine.



RC350/RC300 AWD

A
B
C

258

6-3. Do-it-yourself maintenance



RC300

Remove the oil filler cap by turning
it counterclockwise.

Add engine oil slowly, checking the
dipstick.

Install the oil filler cap by turning it
clockwise.

■

Engine oil consumption

A certain amount of engine oil will be con-

sumed while driving. In the following situa-

tions, oil consumption may increase, and

engine oil may need to be refilled in

between oil maintenance intervals.

●

When the engine is new, for example

directly after purchasing the vehicle or

after replacing the engine

●

If low quality oil or oil of an inappropriate

viscosity is used

●

When driving at high engine speeds or

with a heavy load, or when driving while

accelerating or decelerating frequently

●

When leaving the engine idling for a long

time, or when driving frequently through

heavy traffic

■

After changing the engine oil

The engine oil maintenance data should be

reset. Perform the following procedures:

Select

on the multi-information dis-

play. (

P.76)

Press the

meter control

switch on the steering wheel to select

“Vehicle Settings” then “Oil Mainte-
nance”. (To confirm setting, press

Select “Yes” and then press

A message is displayed on the

multi-information display.

The coolant level is satisfactory if it is
between the “FULL” and “LOW” lines

WARNING

■

Used engine oil

●

Used engine oil contains potentially

harmful contaminants which may

cause skin disorders such as inflamma-

tion and skin cancer, so care should be

taken to avoid prolonged and

repeated contact. To remove used

engine oil from your skin, wash thor-

oughly with soap and water.

●

Dispose of used oil and filters only in a

safe and acceptable manner. Do not

dispose of used oil and filters in house-

hold trash, in sewers or onto the

ground. Call your Lexus dealer, ser-

vice station or auto parts store for

information concerning recycling or

disposal.

●

Do not leave used engine oil within the

reach of children.

NOTICE

■

To prevent serious engine damage

Check the oil level on a regular basis.

■

When replacing the engine oil

●

Be careful not to spill engine oil on the

vehicle components.

●

Avoid overfilling, or the engine could

be damaged.

●

Check the oil level on the dipstick

every time you refill the vehicle.

●

Be sure the engine oil filler cap is prop-

erly tightened.

Checking the coolant

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6-3. Do-it-yourself maintenance

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on the reservoir when the engine is
cold.

■

Engine coolant reservoir



RC350/RC300 AWD



RC300

Reservoir cap
“FULL” line
“LOW” line

If the level is on or below the “LOW” line,
add coolant up to the “FULL” line.
(



P.320)

■

Intercooler coolant reservoir
(RC300)

The coolant level is satisfactory if it is
between the “F” and “L” lines on the
reservoir when the engine is cold.

Reservoir cap
“F” line
“L” line

If the level is on or below the “L” line, add
coolant up to the “F” line. (



P.320)

■

Coolant selection

Only use “Toyota Super Long Life Coolant”

or a similar high quality ethylene glycol

based non-silicate, non-amine, non-nitrite,

and non-borate coolant with long-life

hybrid organic acid technology.
U.S.A.:

“Toyota Super Long Life Coolant” is a mix-

ture of 50% coolant and 50% deionized

water. (Minimum temperature: -31°F

[-35°C])
Canada:

“Toyota Super Long Life Coolant” is a mix-

ture of 55% coolant and 45% deionized

water. (Minimum temperature: -44°F

[-42°C])
For more details about coolant, contact

your Lexus dealer.

■

If the coolant level drops within a short

time of replenishing

Visually check the radiator, hoses, engine

and intercooler coolant reservoir caps,

drain cock and water pump.
If you cannot find a leak, have your Lexus

dealer test the cap and check for leaks in

the cooling system.

A
B
C

260

6-3. Do-it-yourself maintenance

Check the radiator, condenser and
intercooler radiator and clear away
any foreign objects.
If any of the above parts are extremely
dirty or you are not sure of their condi-
tion, have your vehicle inspected by
your Lexus dealer.

■

Checking fluid level

The brake fluid level should be
between the “MAX” and “MIN” lines
on the tank.



RC350/RC300 AWD



RC300

■

Adding fluid

Make sure to check the fluid type and
prepare the necessary item.



Fluid type

SAE J1703 or FMVSS No.116 DOT 3
brake fluid
SAE J1704 or FMVSS No.116 DOT 4
brake fluid



Item

Clean funnel

WARNING

■

When the engine is hot

Do not remove the engine coolant reser-

voir cap, intercooler coolant reservoir

cap and coolant inlet cap. (

P.323)

The cooling system may be under pres-

sure and may spray hot coolant if the cap

is removed, causing serious injuries, such

as burns.

NOTICE

■

When adding coolant

Coolant is neither plain water nor

straight antifreeze. The correct mixture

of water and antifreeze must be used to

provide proper lubrication, corrosion

protection and cooling. Be sure to read

the antifreeze or coolant label.

■

If you spill coolant

Be sure to wash it off with water to pre-

vent it from damaging parts or paint.

Checking the radiator, con-
denser and intercooler radiator
(if equipped)

WARNING

■

When the engine is hot

Do not touch the radiator, condenser or

intercooler radiator as they may be hot

and cause serious injuries, such as burns.

Checking and adding the brake
fluid

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■

Brake fluid can absorb moisture from

the air

Excess moisture in the brake fluid can cause

a dangerous loss of braking efficiency. Use

only newly opened brake fluid.

Check the battery as follows.

■

Battery exterior

Make sure that the battery terminals
are not corroded and that there are no
loose connections, cracks, or loose
clamps.

Terminals
Hold-down clamp

■

Before recharging

When recharging, the battery produces

hydrogen gas which is flammable and

explosive. Therefore, observe the following

before recharging:

●

If recharging with the battery installed on

the vehicle, be sure to disconnect the

ground cable.

●

Make sure the power switch on the char-

ger is off when connecting and discon-

necting the charger cables to the battery.

■

After recharging/reconnecting the bat-

tery

The engine may not start. Follow the proce-

dure below to initialize the system.

Shift the shift lever to P.

Open and close either door.

Restart the engine.

●

Unlocking the doors using the smart

access system with push-button start may

not be possible immediately after recon-

necting the battery. If this happens, use

the wireless remote control or the

mechanical key to lock/unlock the doors.

●

Start the engine with the engine switch in

ACCESSORY mode. The engine may

not start with the engine switch turned off.

However, the engine will operate nor-

mally from the second attempt.

●

The engine switch mode is recorded by

the vehicle. If the battery is disconnected

and reconnected, the vehicle will return

the engine switch mode to the status it

was in before the battery was discon-

nected. Make sure to turn off the engine

before disconnecting the battery. Take

extra care when connecting the battery if

the engine switch mode prior to the bat-

tery being disconnected is unknown.

If the system will not start even after multi-

ple attempts, contact your Lexus dealer.

WARNING

■

When filling the reservoir

Take care as brake fluid can harm your

hands and eyes and damage painted sur-

faces.If fluid gets on your hands or in your

eyes, flush the affected area with clean

water immediately.
If you still experience discomfort, see a

doctor.

NOTICE

■

If the fluid level is low or high

It is normal for the brake fluid level to go

down slightly as the brake pads wear out

or when the fluid level in the accumulator

is high.
If the reservoir needs frequent refilling,

there may be a serious problem.

Battery

A
B

262

6-3. Do-it-yourself maintenance

If any washer does not work or the
warning message appears on the
multi-information display, the washer
tank may be empty. Add washer fluid.



RC350/RC300 AWD

WARNING

■

Chemicals in the battery

Batteries contain poisonous and corro-

sive sulfuric acid and may produce

hydrogen gas which is flammable and

explosive. To reduce the risk of death or

serious injury, take the following precau-

tions while working on or near the bat-

tery:

●

Do not cause sparks by touching the

battery terminals with tools.

●

Do not smoke or light a match near the

battery.

●

Avoid contact with eyes, skin and

clothes.

●

Never inhale or swallow electrolyte.

●

Wear protective safety glasses when

working near the battery.

●

Keep children away from the battery.

■

Where to safely charge the battery

Always charge the battery in an open

area. Do not charge the battery in a

garage or closed room where there is

insufficient ventilation.

■

How to recharge the battery

Only perform a slow charge (5 A or

less). The battery may explode if charged

at a quicker rate.

■

Emergency measures regarding

electrolyte

●

If electrolyte gets in your eyes

Flush your eyes with clean water for at

least 15 minutes and get immediate med-

ical attention. If possible, continue to

apply water with a sponge or cloth while

traveling to the nearest medical facility.

●

If electrolyte gets on your skin

Wash the affected area thoroughly. If you

feel pain or burning, get medical atten-

tion immediately.

●

If electrolyte gets on your clothes

It can soak through clothing on to your

skin. Immediately take off the clothing

and follow the procedure above if neces-

sary.

●

If you accidentally swallow electrolyte

Drink a large quantity of water or milk.

Get emergency medical attention imme-

diately.

NOTICE

■

When recharging the battery

Never recharge the battery while the

engine is running. Also, be sure all acces-

sories are turned off.

Adding the washer fluid

263

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

RC300

Check if the treadwear indicators are
showing on the tires. Also check the
tires for uneven wear, such as excessive
wear on one side of the tread.
Check the spare tire condition and
pressure if not rotated.

New tread
Worn tread
Treadwear indicator

The location of treadwear indicators is
shown by a “TWI” or “

” mark, etc.,

molded into the sidewall of each tire.
Replace the tires if the treadwear indica-
tors are showing on a tire.

WARNING

■

When adding washer fluid

Do not add washer fluid when the engine

is hot or running as washer fluid contains

alcohol and may catch fire if spilled on

the engine, etc.

NOTICE

■

Do not use any fluid other than

washer fluid

Do not use soapy water or engine anti-

freeze instead of washer fluid.
Doing so may cause streaking on the

vehicle’s painted surfaces, as well as

damaging the pump leading to problems

of the washer fluid not spraying.

■

Diluting washer fluid

Dilute washer fluid with water as neces-

sary.
Refer to the freezing temperatures listed

on the label of the washer fluid bottle.

Tires

Replace or rotate tires in accor-
dance with maintenance schedules
and treadwear.

Checking tires

A
B
C

264

6-3. Do-it-yourself maintenance

■

When to replace your vehicle’s tires

Tires should be replaced if:

●

The treadwear indicators are showing on

a tire.

●

You have tire damage such as cuts, splits,

cracks deep enough to expose the fabric,

and bulges indicating internal damage

●

A tire goes flat repeatedly or cannot be

properly repaired due to the size or loca-

tion of a cut or other damage

If you are not sure, consult your Lexus

dealer.

■

Tire life

Any tire over 6 years old must be checked

by a qualified technician even if it has sel-

dom or never been used or damage is not

obvious.

■

Low profile tires

Generally, low profile tires will wear more

rapidly and tire grip performance will be

reduced on snowy and/or icy roads when

compared to standard tires. Be sure to use

snow tires or tire chains on snowy and/or icy

roads and drive carefully at a speed appro-

priate for road and weather conditions.

■

Maximum load of tire

Check that the maximum load of the

replacement tire is greater than 1/2 of the

Gross Axle Weight Ratings (GAWR) of

either the front axle or the rear axle, which-

ever is greater.
For the GAWR, see the Certification Label.

For the maximum load of the tire, see the

load limit at maximum cold tire inflation

pressure mentioned on the sidewall of the

tire. (



P.341)

■

Tire types

●

Summer tires

Summer tires are high-speed performance
tires best suited to highway driving under
dry conditions. Since summer tires do not
have the same traction performance as
snow tires, summer tires are inadequate for
driving on snow-covered or icy roads. For
driving on snow-covered roads or icy
roads, the use of snow tires is recom-
mended. When installing snow tires, be
sure to replace all four tires.

●

All season tires

All season tires are designed to provide
better traction in snow and to be adequate
for driving in most winter conditions as well
as for use year-round. All season tires,
however, do not have adequate traction
performance compared with snow tires in
heavy or loose snow. Also, all season tires
fall short in acceleration and handling per-
formance compared with summer tires in
highway driving.

●

Snow tires

For driving on snow-covered roads or icy
roads, we recommend using snow tires. If
you need snow tires, select tires of the
same size, construction and load capacity
as the originally installed tires. Since your
vehicle has radial tires as original equip-
ment, make sure your snow tires also have
radial construction. Do not install studded
tires without first checking local regula-
tions for possible restrictions. Snow tires
should be installed on all wheels.
(