LEXUS ES 300H (2019 year). Manual — part 20

310

6-2. Maintenance

3

Press

or

of the meter control

switches and select “Scheduled Mainte-

nance”. Then press “OK”.

4

Select “Yes” and press “OK”.

A message will be displayed when the reset

procedure has been completed.

You can perform some maintenance
procedures by yourself.
Please be aware that do-it-yourself
maintenance may affect warranty cov-
erage.

The use of Lexus repair manuals is recom-
mended.
For details about warranty coverage, refer
to the separate “Owner’s Guide”, “War-
ranty and Service Guide”, “Owner’s Man-
ual Supplement” or “Warranty Booklet”.

Do-it-yourself maintenance

General maintenance

Listed below are the general main-
tenance items that should be per-
formed at the intervals specified in
the “Warranty and Service Guide”
or “Owner’s Manual Supplement”.
It is recommended that any prob-
lem you notice should be brought to
the attention of your Lexus dealer
or qualified service shop for advice.

WARNING

■

If the hybrid system is operating

Turn the hybrid system off and ensure

that there is adequate ventilation before

performing maintenance checks.

Engine compartment

Items

Check points

Brake fluid

Is the brake fluid at the
correct level?
(

P.322)

Engine/power
control unit cool-
ant

Is the engine/power
control unit coolant at
the correct level?
(

P.320)

Engine oil

Is the engine oil at the
correct level?
(

P.318)

Exhaust system

There should not be
any fumes or strange
sounds.

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6-2. Maintenance

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Radiator/con-
denser

The radiator and con-
denser should be free
from foreign objects.
(

P.321)

Washer fluid

Is there sufficient
washer fluid?
(

P.322)

Trunk

Items

Check points

12-volt battery

Check the battery fluid
level and connections.
(

P.323)

Vehicle interior

Items

Check points

Accelerator
pedal

• The accelerator

pedal should move
smoothly (without
uneven pedal effort
or catching).

Hybrid transmis-
sion “Park” mech-
anism

• When parked on a

slope and the shift
lever is in P, is the
vehicle securely
stopped?

Brake pedal

• Does the brake

pedal move
smoothly?

• Does the brake

pedal have appro-
priate clearance
from the floor?

• Does the brake

pedal have the cor-
rect amount of free
play?

Items

Check points

Brakes

• The vehicle should

not pull to one side
when the brakes are
applied.

• The brakes should

work effectively.

• The brake pedal

should not feel
spongy.

• The brake pedal

should not get too
close to the floor
when the brakes are
applied.

Head restraints

• Do the head

restraints move
smoothly and lock
securely?

Indicators/buzz-
ers

• Do the indicators

and buzzers function
properly?

Lights

• Do all the lights

come on?

• Are the headlights

aimed correctly?

Parking brake

• Does the parking

brake operate nor-
mally?

• When parked on a

slope and the park-
ing brake is on, is the
vehicle securely
stopped?

Seat belts

• Do the seat belts

operate smoothly?

• The seat belts should

not be damaged.

Items

Check points

312

6-2. Maintenance

Seats

• Do the seat controls

operate properly?

Steering wheel

• Does the steering

wheel rotate
smoothly?

• Does the steering

wheel have the cor-
rect amount of free
play?

• There should not be

any strange sounds
coming from the
steering wheel.

Vehicle exterior

Items

Check points

Doors/trunk

• Do the doors/trunk

operate smoothly?

Engine hood

• Does the engine

hood lock system
work properly?

Fluid leaks

• There should not be

any signs of fluid
leakage after the
vehicle has been
parked.

Items

Check points

Tires

• Is the tire inflation

pressure correct?

• The tires should not

be damaged or
excessively worn.

• Have the tires been

rotated according to
the maintenance
schedule?

• The wheel nuts

should not be loose.

Windshield wip-
ers

• The wiper blades

should not show any
signs of cracking,
splitting, wear, con-
tamination or defor-
mation.

• The wiper blades

should clear the
windshield without
streaking or skip-
ping.

Items

Check points

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6-2. Maintenance

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The OBD system determines that a
problem exists somewhere in the emis-
sion control system. Your vehicle may
not pass the I/M test and may need to
be repaired. Contact your Lexus
dealer to service the vehicle.

 When the 12-volt battery is discon-

nected or discharged
Readiness codes that are set during
ordinary driving are erased.
Also, depending on your driving
habits, the readiness codes may not
be completely set.

 When the fuel tank cap is loose

The malfunction indicator lamp
comes on indicating a temporary
malfunction and your vehicle may
not pass the I/M test.

The error code in the OBD system will
not be cleared unless the vehicle is
driven 40 or more times.

Contact your Lexus dealer to prepare
the vehicle for re-testing.

Emission inspection and
maintenance (I/M) pro-
grams

Some states have vehicle emission
inspection programs which include
OBD (On Board Diagnostics)
checks. The OBD system monitors
the operation of the emission con-
trol system.

If the malfunction indicator lamp
comes on

Your vehicle may not pass the
I/M test in the following situa-
tions:

When the malfunction indicator
lamp still remains on after sev-
eral driving trips

If your vehicle does not pass the
I/M test

314

6-3. Do-it-yourself maintenance

6-3.Do-it-yourself maintenance

Do-it-yourself service pre-
cautions

If you perform maintenance by
yourself, be sure to follow the cor-
rect procedure as given in these
sections.

Maintenance

Items

Parts and tools

12-volt battery
condition
(

P.323)

• Grease
• Conventional wrench

(for terminal clamp
bolts)

Brake fluid
level
(

P.322)

• FMVSS No.116 DOT 3

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

• Rag or paper towel
• Funnel (used only for

adding brake fluid)

Engine/power
control unit
coolant level
(

P.320)

• “Toyota Super Long Life

Coolant” or a similar
high quality ethylene
glycol-based non-sili-
cate, non-amine, non-
nitrite and non-borate
coolant with long-life
hybrid organic acid
technology
For the U.S.A.:
“Toyota 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)

Hybrid bat-
tery (traction
battery) air
intake vent
(

P.304)

• Vacuum cleaner, etc.
• Phillips screwdriver

Engine oil level
(

P.318)

• “Toyota Genuine Motor

Oil” or equivalent

• Rag or paper towel
• Funnel (used only for

adding engine oil)

Fuses
(

P.341)

• Fuse with same amper-

age rating as original

Headlight aim

• Phillips-head screw-

driver

Light bulbs
(

P.344)

• Bulb with same number

and wattage rating as
original

• Flathead screwdriver

Items

Parts and tools

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Radiator and
condenser
(

P.321)



Tire inflation
pressure
(

P.334)

• Tire pressure gauge
• Compressed air source

Washer fluid
(

P.322)

• Water or washer fluid

containing antifreeze
(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

●

Make sure that the “IGNITION ON”

on the multi-information display and

the “READY” indicator are both off.

●

Keep hands, clothing and tools away

from the moving fan and engine drive

belt.

●

Be careful not to touch the engine,

power control unit, radiator, exhaust

manifold, etc. right after driving as they

may be hot. Oil and other fluids may

also be hot.

●

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. Fuel fumes are

flammable.

Items

Parts and tools

■

When working near the electric cool-

ing fan or radiator grille

Be sure the power switch is off.

With the power switch in ON mode, the

electric cooling fan may automatically

start to run if the air conditioning is on

and/or the coolant temperature is high.

(

P.321)

■

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.

316

6-3. Do-it-yourself maintenance

1

Pull the hood lock release lever.

The hood will pop up slightly.

2

Pull up the auxiliary catch lever and
lift the hood.

■

Front

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

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6-3. Do-it-yourself maintenance

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■

Rear

318

6-3. Do-it-yourself maintenance

Fuse boxes (

P.341)

Engine oil filler cap (

P.319)

Engine oil level dipstick (

P.318)

Brake fluid reservoir (

P.322)

Radiator (

P.321)

Electric cooling fan

Condenser (

P.321)

Power control unit coolant reservoir (

P.321)

Engine coolant reservoir (

P.320)

Washer fluid tank (

P.322)

■

12-volt battery

P.323

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

Engine compartment

Components

A
B
C
D

E
F

G

H

I

J

Checking and adding the engine
oil

319

6-3. Do-it-yourself maintenance

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on the dipstick.

■

Checking the engine oil

1

Park the vehicle on level ground.

After warming up the engine and turning

off the hybrid system, wait more than 5

minutes for the oil to drain back into the

bottom of the engine.

2

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

3

Wipe the dipstick clean.

4

Reinsert the dipstick fully.

5

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.

6

Wipe the dipstick and reinsert it
fully.

■

Checking the oil type and prepar-
ing the items needed

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

P.396

 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.

1

Remove the oil filler cap by turning
it counterclockwise.

2

Add engine oil slowly, checking the
dipstick.

3

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

A
B
C

320

6-3. Do-it-yourself maintenance

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:

1

While the vehicle is stopped, press

of the meter control switches.

2

Press

or

of the meter control

switches, and select

.

3

Press

or

of the meter control

switches, select “Vehicle Settings”, and
then press “OK”.

4

Press

or

of the meter control

switches, select “Oil Maintenance”, and
then press “OK”.

5

Select “Yes” and then press “OK”.

A message will be displayed on the multi-

information display.

The coolant level is satisfactory if it is
between the “F”/“FULL” and
“L”/“LOW” lines on the reservoir when
the hybrid system is cold.

■

Engine coolant reservoir

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, service 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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Reservoir cap

“F” line

“L” line

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

P.388)

■

Power control unit coolant reser-
voir

Reservoir cap

“FULL” line

“LOW” line

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

P.389)

■

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/power control unit 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.

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

A
B
C

A
B
C

WARNING

■

When the hybrid system is hot

Do not remove the engine/power control

unit coolant reservoir caps or the radia-

tor cap. (

P.391)

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 and con-
denser

322

6-3. Do-it-yourself maintenance

■

Checking fluid level

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

■

Adding fluid

Make sure to check the fluid type and
prepare the necessary items.
 Fluid type

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

 Item

Clean funnel

■

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.

If any washer does not work or “Wind-
shield Washer Fluid Low” is shown on
the multi-information display, the
washer tank may be empty. Add
washer fluid.

WARNING

■

When the hybrid system is hot

Do not touch the radiator or condenser

as they may be hot and cause serious

injuries, such as burns.

Checking and adding the brake
fluid

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.

Adding the washer fluid

WARNING

■

When adding washer fluid

Do not add washer fluid when the hybrid

system is hot or operating as washer fluid

contains alcohol and may catch fire if

spilled on the engine etc.

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6-3. Do-it-yourself maintenance

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The 12-volt battery is located on the
right-hand side of the trunk.

■

Before recharging

When recharging, the 12-volt battery pro-

duces hydrogen gas which is flammable

and explosive. Therefore, observe the fol-

lowing precautions before recharging:

●

If recharging with the 12-volt battery

installed on the vehicle, be sure to discon-

nect the ground cable.

●

Make sure the power switch on the char-

ger is off when connecting and discon-

necting the charger cables to the 12-volt

battery.

■

After recharging/reconnecting the 12-

volt battery

●

Unlocking the doors using the smart

access system with push-button start may

not be possible immediately after recon-

necting the 12-volt battery. If this hap-

pens, use the wireless remote control or

the mechanical key to lock/unlock the

doors.

●

Start the hybrid system with the power

switch in ACCESSORY mode. The

hybrid system may not start with the

power switch turned off. However, the

hybrid system will operate normally from

the second attempt.

●

The power switch mode is recorded by

the vehicle. If the 12-volt battery is recon-

nected, the vehicle will return the power

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.

12-volt battery

Location

324

6-3. Do-it-yourself maintenance

switch mode to the status it was in before

the 12-volt battery was disconnected.

Make sure to turn off the power switch

before disconnect the 12-volt battery.

Take extra care when connecting the 12-

volt battery if the power switch mode

prior to discharge is unknown.

If the hybrid system will not start even after

multiple attempts at all methods above,

contact your Lexus dealer.

Lift the luggage mat up.

WARNING

■

Chemicals in the 12-volt battery

The 12-volt battery contains poisonous

and corrosive sulfuric acid and may pro-

duce hydrogen gas which is flammable

and explosive. To reduce the risk of death

or serious injury, take the following pre-

cautions while working on or near the 12-

volt battery:

●

Do not cause sparks by touching the

12-volt battery terminals with tools.

●

Do not smoke or light a match near the

12-volt battery.

●

Avoid contact with eyes, skin and

clothes.

●

Never inhale or swallow electrolyte.

●

Wear protective safety glasses when

working near the 12-volt battery.

●

Keep children away from the 12-volt

battery.

■

Where to safely charge the 12-volt

battery

Always charge the 12-volt battery in an

open area. Do not charge the 12-volt bat-

tery in a garage or closed room where

there is insufficient ventilation.

■

How to recharge the 12-volt battery

Recharge at a current of 5 A or less and

make sure that the recharging period

does not exceed a total of 12 hours.

■

Emergency measures regarding

electrolyte

●

If electrolyte gets in your eyes

Flush your eyes with clean water for at

least 15 minutes and get immediate

medical 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

attention 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 nec-

essary.

●

If you accidentally swallow electrolyte

Drink a large quantity of water or milk.

Get emergency medical attention

immediately.

■

When replacing the 12-volt battery

Use a 12-volt battery designed for this

vehicle. Failure to do so may cause gas

(hydrogen) to enter the passenger com-

partment, causing a fire or explosion.
For replacement of the 12-volt battery,

contact your Lexus dealer.

NOTICE

■

When recharging the 12-volt battery

Never recharge the 12-volt battery while

the hybrid system is operating. Also, be

sure all accessories are turned off.

Removing the 12-volt battery
cover

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6-3. Do-it-yourself maintenance

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Make sure that the 12-volt battery ter-
minals are not corroded and that there
are no loose connections, cracks, or
loose clamps.

Terminals

Hold-down clamp

Check the 12-volt battery condition by
indicator color.

Blue: Good condition

Red: Charging is necessary.

Have the vehicle inspected by your Lexus
dealer.

Clear: Replacement is necessary.

Have the 12-volt battery checked by your
Lexus dealer.

Exterior

Checking 12-volt battery condi-
tion

A
B

A
B

C