LEXUS NX 300H (2019 year). Instruction - part 20

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6-1. Maintenance and care

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Clean the air intake vents by the follow-
ing procedures to prevent dust from 
accumulating in them, or to prevent 
them from clogging.

There are air intake vents on the both sides 
of the seats.

■

Cleaning the air intake vents

1

Remove the dust from the vents 
with a vacuum cleaner etc.

Clean the vents of the both sides.

2

Start the hybrid system and check 
that the warning message on the 
multi-information display disap-
pears.

NOTICE

■

Preventing damage to leather sur-

faces

Observe the following precautions to 

avoid damage to and deterioration of 

leather surfaces:

●

Remove any dust or dirt from leather 

surfaces immediately.

●

Do not expose the vehicle to direct 

sunlight for extended periods of time. 

Park the vehicle in the shade, espe-

cially during summer.

●

Do not place items made of vinyl, plas-

tic, or containing wax on the uphol-

stery, as they may stick to the leather 

surface if the vehicle interior heats up 

significantly.

■

Water on the floor

Do not wash the vehicle floor with water.

Vehicle systems such as the audio system 

may be damaged if water comes into 

contact with electrical components such 

as the audio system above or under the 

floor of the vehicle. Water may also 

cause the body to rust.

■

When cleaning the inside of the wind-

shield (vehicles with Lexus Safety 

System+)

Do not allow glass cleaner to contact the 

lens. Also, do not touch the lens. 

(

P.198)

■

Cleaning the inside of the rear win-

dow

●

Do not use glass cleaner to clean the 

rear window, as this may cause dam-

age to the rear window defogger 

heater wires or antenna. Use a cloth 

dampened with lukewarm water to 

gently wipe the window clean. Wipe 

the window in strokes running parallel 

to the heater wires or antenna.

●

Be careful not to scratch or damage 

the heater wires or antenna.

■

Cleaning the front side windows

Do not use any compound or abrasive 

product (e.g., glass cleaner, detergent, 

wax) to clean the windows. It may dam-

age the coating.

Cleaning the air intake vents

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It may take several minutes before the 

warning message disappears.

■

Cleaning the air intake vents

●

Dust on the air intake vents may inter-

feres cooling of the hybrid battery (trac-

tion battery) and results in poor fuel 

consumption. Clean the air intake vents 

periodically.

●

If continuing to drive the vehicle with 

“Maintenance required for Traction bat-

tery cooling parts See owner’s manual” 

shown on the multi-information display, 

the hybrid battery (traction battery) input 

and output may be restricted, leading to a 

reduction in hybrid battery (traction bat-

tery) output and a malfunction. It may 

cause poor fuel consumption or a mal-

function. If the warning message is shown, 

contact your Lexus dealer or clean the air 

intake vents immediately.

●

If the warning message on the multi-infor-

mation display does not disappear after 

cleaning the air intake vents, have the 

vehicle inspected by your Lexus dealer.

●

Timing of cleaning air intake vents differs 

depending on the use environment of the 

vehicle.

 Remove dirt and dust using a vac-

uum cleaner.

 Wipe off any excess dirt and dust 

with a soft cloth dampened with 
diluted detergent.

Use a diluted water solution of approxi-
mately 5% neutral wool detergent.

 Wring out any excess water from 

the cloth and thoroughly wipe off all 
remaining traces of detergent.

 Wipe the surface with a dry, soft 

cloth to remove any remaining 
moisture. Allow the leather to dry in 
a shaded and ventilated area.

■

Caring for leather areas

Lexus recommends cleaning the interior of 

the vehicle at least twice a year to maintain 

the quality of the vehicle’s interior.

 Remove dirt and dust using a vac-

uum cleaner.

 Wipe it off with a soft cloth damp-

ened with neutral detergent diluted 

NOTICE

■

When cleaning the air intake vents

When cleaning the air intake vent, make 

sure to only use a vacuum to suck out 

dust and clogs. If a compressed air blow 

gun, etc. is used to blow out dust and 

clogs, the dust or clogs may be pushed 

into the air intake vent, which may affect 

the performance of the hybrid battery 

(traction battery) and cause a malfunc-

tion.

■

To prevent damage to the vehicle

Observe the following precautions. Fail-

ure to do so may cause damage to the 

vehicle.

●

Do not use water or other liquid to 

clean the air intake vents

●

Do not install anything but the filters 

exclusive for this vehicle to the air 

intake vents or use the vehicle without 

installing the filters.

Cleaning the leather areas

Cleaning the synthetic leather 
areas

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to approximately 1%.

 Wring out any excess water from 

the cloth and thoroughly wipe off 
remaining traces of detergent and 
water.

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6-2. Maintenance

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6-2.Maintenance

■

Repair and replacement

It is recommended that genuine Lexus parts 

be used for repairs to ensure performance 

of each system. If non-Lexus parts are used 

in replacement or if a repair shop other than 

a Lexus dealer performs repairs, confirm 

the warranty coverage.

■

Allow inspection and repairs to be per-

formed by a Lexus dealer

●

Lexus technicians are well-trained spe-

cialists and are kept up to date with the 

latest service information. They are well 

informed about the operation of all sys-

tems on your vehicle.

●

Keep a copy of the repair order. It proves 

that the maintenance that has been per-

formed is under warranty coverage. If any 

problem should arise while your vehicle is 

under warranty, your Lexus dealer will 

promptly take care of it.

General maintenance should be per-
formed on a daily basis. This can be 
done by yourself or by a Lexus dealer.

Scheduled maintenance should be 
performed at specified intervals 
according to the maintenance sched-
ule.

For details about maintenance items and 
schedules, refer to the “Warranty and Ser-
vice Guide”, “Owner’s Manual Supple-
ment” or “Scheduled Maintenance”.

■

Resetting the message indicating main-

tenance is required (U.S.A. only)

After the required maintenance is pre-

formed according to the maintenance 

schedule, please reset the message.

To reset the message, follow the procedures 

described below:

1

Press 

 or 

 of the meter control 

switches and select 

.

Maintenance requirements

To ensure safe and economical driv-
ing, day-to-day care and regular 
maintenance are essential. It is the 
owner’s responsibility to perform 
regular checks. Lexus recommends 
the following maintenance:

WARNING

■

If your vehicle is not properly main-

tained

Improper maintenance could result in 

serious damage to the vehicle and possi-

ble death or serious injury.

■

Handling of the 12-volt battery

●

Engine exhaust, some of its constitu-

ents, and a wide variety of automobile 

components contain or emit chemicals 

known to the State of California to 

cause cancer and birth defects and 

other reproductive harm. Work in a 

well ventilated area.

●

Oils, fuels and fluids contained in vehi-

cles as well as waste produced by 

component wear contain or emit 

chemicals known to the State of Cali-

fornia to cause cancer and birth 

defects or other reproductive harm. 

Avoid exposure and wash any affected 

area immediately.

●

12-volt Battery posts, terminals and 

related accessories contain lead and 

lead compounds which are known to 

cause brain damage. Wash your hands 

after handling. (

P.334)

General maintenance

Scheduled maintenance

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6-2. Maintenance

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2

Press 

 or 

 of the meter control 

switches, select the “Vehicle Settings” 
and then press 

.

3

Press 

 or 

 of the meter control 

switches, select the “Scheduled Mainte-
nance” and then press and hold the 

.

4

Select the “Yes” and push 

.

“The Data Has Been Reset” is displayed 
on the multi-information display.

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 cor-
rect level? (

P.333)

Engine/power 
control unit 
coolant

Is the engine coolant at the 
correct level? (

P.331)

Engine oil

Is the engine oil at the cor-
rect level? (

P.329)

Exhaust sys-
tem

There should not be any 
fumes or strange sounds.

Radiator/con-
denser

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

P.332)

Washer fluid

Is there sufficient washer 
fluid? (

P.333)

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Luggage compartment

Items

Check points

12-volt battery

Check the connections. 
(

P.334)

Vehicle interior

Items

Check points

Accelerator 
pedal

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

Brake pedal

• Does the brake pedal 

move smoothly?

• Does the brake pedal 

have appropriate clear-
ance from the floor?

• Does the brake pedal 

have the correct amount 
of free play?

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?

Hybrid trans-
mission “Park” 
mechanism

When parked on a slope 
and the shift lever is in P, is 
the vehicle securely 
stopped?

Indicators/
buzzers

Do the indicators and 
buzzers function properly?

Lights

Do all the lights come on?

Parking brake

• Does the parking brake 

switch operate nor-
mally?

• When parked on a slope 

and the parking brake is 
on, is the vehicle 
securely stopped?

Seat belts

• Do the seat belts oper-

ate smoothly?

• The seat belts should not 

be damaged.

Seats

Do the seat controls oper-
ate properly?

Steering 
wheel

• Does the steering wheel 

rotate smoothly?

• Does the steering wheel 

have the correct amount 
of free play?

• There should not be any 

strange sounds coming 
from the steering wheel.

Vehicle exterior

Items

Check points

Doors

Do the doors 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

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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.

Tires

• Is the tire inflation pres-

sure 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 
wipers/rear 
window wiper

• The  wiper  blades  should 

not show any signs of 
cracking, splitting, wear, 
contamination or defor-
mation.

• The  wiper  blades  should 

clear the windshield/
rear window without 
streaking or skipping.

Items

Check points

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 situations:

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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.

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

If your vehicle does not pass the 
I/M test

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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 Bat-
tery condition 
(

P.334)

• Grease
• Conventional  wrench 

(for terminal clamp 
bolts)

Brake fluid 
level 
(

P.333)

• FMVSS No.116 DOT 3 

or SAE J1703; 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.331)

• “Toyota  Super  Long  Life 

Coolant” or a similar 
high quality ethylene gly-
col-based non-silicate, 
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)

Engine oil 
level 
(

P.329)

• “Toyota  Genuine  Motor 

Oil” or equivalent

• Rag or paper towel
• Funnel (used only for 

adding engine oil)

Fuses 
(

P.351)

Fuse with same amperage 
rating as original

Light bulbs 
(

P.355)

Bulb with same number 
and wattage rating as orig-
inal

Headlight aim Phillips-head screw-driver

Radiator and 
condenser 
(

P.332)

—

Items

Parts and tools

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Tire inflation 
pressure 
(

P.345)

• Tire pressure gauge
• Compressed air source

Washer fluid 
(

P.333)

• 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 fans or radiator grille

Be sure the power switch is off.

With power switch in ON mode, the 

electric cooling fans may automatically 

start to run if the air conditioning is on 

and/or the coolant temperature is high. 

(

P.332)

■

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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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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■

Rear

1

Remove the bolt   and then 
remove the cover  .

2

Raising your vehicle with a floor 
jack.

A

B

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Fuse box (

P.351)

Engine coolant reservoir (

P.331)

Engine oil filler cap (

P.330)

Power control unit coolant reservoir (

P.332)

Brake fluid reservoir (

P.333)

Radiator (

P.332)

Condenser (

P.332)

Electric cooling fans
Engine oil level dipstick (

P.329)

Washer fluid tank (

P.333)

■

12-volt battery

P.334

Engine compartment

Components

A
B
C
D

E
F

G

H

I

J

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■

Removing the engine compart-
ment cover

■

Installing the clips

1

Insert

2

Press

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

■

Checking the engine oil

1

Park the vehicle on level ground. 
After warming up the hybrid sys-
tem, and turning off the engine, 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 with its 
protruding areas (  in the illustra-
tion) pointing towards engine.

Engine compartment cover

NOTICE

■

After installing an engine compart-

ment cover

Make sure that the cover is securely 

installed in its original position.

Checking and adding the engine 
oil

A

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5

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

Low
Normal
Excessive
Measuring side

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.404

 Oil quantity (Low Full)

1.6 qt. (1.5 L, 1.3 Imp.qt.)

 Items

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 

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, when towing, or when 

driving while accelerating or decelerat-

ing 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

Press 

 or 

 of the meter control 

switches and select 

.

A
B
C
D

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2

Press 

 or 

 of the meter control 

switches, select the “Vehicle Settings” 
and then press 

.

3

Press 

 or 

 of the meter control 

switches, select the “Oil Maintenance” 
and then press and hold 

.

4

Select the “Yes” and push 

.

“The Data Has Been Reset” is displayed 
on the multi-information display.

The coolant level is satisfactory if it is 
between the “FULL” and “LOW” lines 
on the reservoir when the hybrid sys-
tem is cold.

■

Engine coolant reservoir

Reservoir cap
“FULL” line
“LOW” line

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

P.396)

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

A
B
C