Lexus NX450H+ (2022 year). Manual in english

Engine compartment maintenance items list

Items

Check points

Brake fluid

Is the brake fluid at the correct level?

→

P.590

Engine/power control

unit coolant

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

→

P.588

Engine oil

Is the engine oil at the correct level?

→

P.586

Exaust system

There should not be any fumes or strange sounds.

Radiator/condenser

The radiator and condenser should be free from foreign
objects.

→

P.589

Washer fluid

Is there sufficient washer fluid?

→

P.592

8-3. Maintenance

577

Maintenance and car

Vehicle interior maintenance items list

Items

Check points

Accelerator

pedal

The accelerator pedal should move smoothly. There should be no un-
even pedal effort or catching.

Hybrid trans-

mission “Park”

mechanism

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

Brake pedal

●

Does the brake pedal move smoothly?

●

Does the brake pedal have appropriate clearance 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?

Indicators/

buzzers

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 switch operate normally?

●

When parked on a slope and the parking brake is on, is the vehicle
securely stopped?

Seat belts

●

Do the seat belts operate smoothly?

●

The seat belts should not be damaged.

Seats

Do the seat controls operate 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.

8-3. Maintenance

579

Maintenance and car

Vehicle exterior maintenance items list

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.

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

wipers/rear

window wiper

●

The wiper blades should not show any signs of cracking, splitting,
wear, contamination or deformation.

●

The wiper blades should clear the windshield/rear window without
streaking or skipping.

8-3. Maintenance

580

Emission inspection and maintenance (I/M) programs

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

When the malfunction indicator lamp comes on

The OBD system determines that a problem exists somewhere in the emission
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.

Situations your vehicle may not pass the I/M test

Your vehicle may not pass the I/M test in the following situations:

●

When the 12-volt battery is disconnected or discharged
Readiness codes that are set during ordinary driving are erased. Also, depend-
ing 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.

When the malfunction indicator lamp still remains on after several
driving trips

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

When your vehicle does not pass the I/M test

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

8-3. Maintenance

581

Maintenance and car

Inspection of consumables

Do-it-yourself service precautions

If you perform maintenance by yourself, be sure to follow the correct procedure as
given in the section for each part.

WARNING

The engine compartment contains many mechanisms and fluids that may move suddenly,
become hot, or become electrically charged. Observe the following precautions.

■

When working on the engine compartment

●

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 flamma-
ble.

■

When working near the electric cooling fan or radiator grille

Be sure the power switch is OFF.
With the power switch in ON, the electric cooling fan may automatically start to run if the
air conditioning is on or the coolant temperature is high.

■

Safety glasses

Wear safety glasses to prevent flying or falling material, fluid spray, etc., from getting 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.

Maintenance

Items which require maintenance and the necessary parts and tools to perform
maintenance on those items are as follows:

■

12-volt battery condition

●

Grease

●

Conventional wrench (for terminal clamp bolts)

8-4. Inspection of consumables

582

■

Brake fluid level

●

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

●

"Toyota Super Long Life Coolant" or a similar high quality ethylene glycol-based
non-silicate, non-amine, nonnitrite 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

●

"Toyota Genuine Motor Oil" or equivalent

●

Rag or paper towel

●

Funnel (used only for adding engine oil)

■

Fuses

Fuse with same amperage rating as original

■

Light bulbs

Bulb with same number and wattage rating as original

■

Headlight aim

Phillips-head screwdriver

■

Radiator and condenser

■

Tire inflation pressure

●

Tire pressure gauge

●

Compressed air source

■

Washer fluid

●

Water or washer fluid containing antifreeze (for winter use)

●

Funnel (used only for adding water or washer fluid)

8-4. Inspection of consumables

583

Maintenance and car

Opening the hood

Pull the hood lock release lever.

The hood will pop up slightly.

Push the auxiliary catch lever to the left and
lift the hood.

INFORMATION

■

Closing the hood

When closing the hood, make sure to release it from a slightly high position (approxi-
mately 7.9 in. [20 cm]) to close it.
If the hood is pushed by hand to close it, it may not lock on both sides.

WARNING

■

Pre-driving check

Check that the hood is fully closed and locked.
If the hood is not locked properly, the hood may suddenly open while driving.

8-4. Inspection of consumables

584

Engine compartment

Engine compartment components

Fuse boxes

→

P.731

Engine oil filler cap

→

P.588

Engine oil level dipstick

→

P.586

Brake fluid reservoir

Radiator

Electric cooling fan

Washer fluid tank

Power control unit coolant reservoir

→

P.589

Engine coolant reservoir

→

P.588

Checking and adding the engine oil

INFORMATION

■

Engine oil consumption

A certain amount of engine oil will be consumed while driving. In the following situations,
oil consumption may increase, and engine oil may need to be added in between oil
maintenance intervals.

8-4. Inspection of consumables

585

Maintenance and car

●

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 (vehicles with
towing package only), or when driving while accelerating or decelerating frequently

●

When leaving the engine idling for a long time, or when driving frequently through
heavy traffic

WARNING

●

Used engine oil contains potentially harmful contaminants which may cause skin
disorders such as inflammation and skin cancer, so care should be taken to avoid
prolonged and repeated contact. To remove used engine oil from your skin, wash
thoroughly 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 household 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

■

When replacing the engine oil

When replacing the engine oil, observe the following precautions.

●

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 properly tightened.

■

If oil is spilled on the engine cover

To prevent the engine cover from being damaged, remove any engine oil from the engine
cover as soon as possible using a neutral detergent. Do not use an organic solvent such
as brake cleaner.

Checking the engine oil

With the engine at operating temperature and turned off, check the oil level on the
dipstick.

8-4. Inspection of consumables

586

NOTICE

To prevent serious engine damage, check the oil level on a regular basis.

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.

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

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 preparing the items needed

Make sure to check the oil type and prepare the items needed before adding oil.

●

Engine oil selection

●

Oil quantity (Low

→

Full)

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

●

Items
Clean funnel

Related Links

Lubrication system(P. 742)

8-4. Inspection of consumables

587

Maintenance and car

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.

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.

Checking the coolant

The coolant level is satisfactory if it is between the [FULL] and [LOW] lines on the
reservoir when the hybrid system 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.

■

Power control unit 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.

8-4. Inspection of consumables

588

INFORMATION

■

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 mixture of 50% coolant and 50% deion-
ized water. (Minimum temperature: -31°F [-35°C])
Canada: "Toyota Super Long Life Coolant" is a mixture 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.

WARNING

When the hybrid system is hot, do not remove the engine coolant reservoir cap or power
control unit coolant reservoir cap.
The cooling system may be under pressure 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 prevent it from damaging parts or paint.

Checking the radiator and condenser

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 condition,
have your vehicle inspected by your Lexus dealer.

8-4. Inspection of consumables

589

Maintenance and car

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.

■

When the electric cooling fan are operating

Do not touch the engine compartment. With the power switch in ON, the electric cooling
fan may automatically start to run if the air conditioning is on or the coolant temperature
is high. Be sure the power switch is OFF when working near the electric cooling fan or
radiator grille.

Checking the brake fluid

The brake fluid level should be between the
[MAX] and [MIN] lines on the tank.

Adding the brake fluid

Slide and lift up the rubber strip to partly
remove it as shown.

Disconnect the claws and remove the service
cover.

8-4. Inspection of consumables

590

Remove the reservoir cap.

Add brake fluid slowly while checking the fluid level.

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

●

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

●

Items
Clean funnel

WARNING

Take care when filling the reservoir, as brake fluid can harm your hands and eyes and
damage painted surfaces.
If brake fluid gets on your hands or in your eyes, flush the affected area with clean
water immediately.
If you experience discomfort, see a doctor.

NOTICE

It is normal for the brake fluid level to go down slightly as the brake pads wear or
when the fluid level in the accumulator is high.
If the reservoir needs frequent refilling, there may be a serious problem.

INFORMATION

■

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.

8-4. Inspection of consumables

591

Maintenance and car

Lexus NX450H+ (2022 year). Manual in english - page 35