2019 LEXUS RX450H check

5857-1. Maintenance and care
7
Maintenance and care
RX450h_RX450hL_U
■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.
■Shampooing the carpets
There are several commercial foaming-type cleaners available. Use a sponge or brush to
apply the foam. Rub in overlapp ing circles. Do not use water. Wipe dirty surfaces and let
them dry. Excellent results are obtained by keeping the carpet as dry as possible.
■Seat belts
Clean with mild soap and lukewarm water using a cloth or sponge. Also check the belts
periodically for excessive wear, fraying or cuts.
WARNING
■Water in the vehicle
●Do not splash or spill liquid in the vehicle, su ch as on the floor, in the hybrid battery
(traction battery) air vents, and in the luggage compartment.
Doing so may cause the hybrid battery, elec trical components, etc. to malfunction or
catch fire.
●Do not get any of the SRS components or wiring in the vehicle interior wet. (P. 38)
An electrical malfunction ma y cause the airbags to deploy or not function properly,
resulting in death or serious injury.
●Vehicles with wireless charger:
Do not let the wireless charger ( P. 549) get wet. Failure to do so may cause the
charger to become hot and cause burns or could cause electric shock resulting in
death or serious injury.
■Cleaning the interior (especially instrument panel)
Do not use polish wax or polish cleaner. Th e instrument panel may reflect off the wind-
shield, obstructing the driver’s view and le ading to an accident, resulting in death or
serious injury.

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RX450h_RX450hL_U
7
Maintenance and care
7-2. Maintenance
General maintenance should be performed on a daily basis. This can be done by
yourself or by a Lexus dealer.
Scheduled maintenance should be perfor med at specified intervals according to
the maintenance schedule.
For details about maintenance items and sc hedules, refer to the “Warranty and Ser-
vice Guide”, “Owner’s Manual Supplement” or “Scheduled Maintenance”.
You can perform some maintena nce procedures by yourself.
Please be aware that do-it-yourself maintenance may affect warranty coverage.
The use of Lexus repair manuals is recommended.
For details about warranty co verage, refer to the separate “Owner’s Guide”, “War-
ranty and Service Guide”, “Owner’s Manu al Supplement” or “Warranty Booklet”.
Maintenance requirements
To ensure safe and economical driving, day-to-day care and regular mainte-
nance are essential. It is the owner’s re sponsibility to perform regular checks.
Lexus recommends the following maintenance:
General maintenance
Scheduled maintenance
Do-it-yourself maintenance

5897-2. Maintenance
7
Maintenance and care
RX450h_RX450hL_U
General maintenance
Listed below are the general maintenance items that should be performed at
the intervals specified in the “Warranty and Service Guide” or “Owner’s
Manual Supplement”. It is recommende d that any problem you notice should
be brought to the attention of your Lexu s dealer or qualified service shop for
advice.
Engine compartment
ItemsCheck points
Brake fluidIs the brake fluid at the correct level? ( P. 603)
Engine/power control unit
coolantIs the engine/power control unit coolant at the correct
level?( P. 601)
Engine oilIs the engine oil at the correct level?( P. 598)
Exhaust systemThere should not be any fumes or strange sounds.
Radiator/condenserThe radiator and condenser should be free from
foreign objects. (P. 602)
Washer fluidIs there sufficient washer fluid?( P. 604)
Luggage compartment
ItemsCheck points
12-volt batteryCheck the connections. (P. 605)

5907-2. Maintenance
RX450h_RX450hL_U
*: Vehicles with sing le-beam headlights
Vehicle interior
ItemsCheck points
Accelerator pedal• The accelerator pedal sh ould move smoothly (with-
out uneven pedal effort or catching).
Brake pedal
• Does the brake pedal move smoothly?
• Does the brake pedal have appropriate clearance from the floor? ( P. 716)
• Does the brake pedal have the correct amount of free play? ( P. 716)
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 no t get too close to the floor
when the brakes are applied.
Head restraints• Do the head restraints move smoothly and lock securely?
Hybrid transmission “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?
• Are the headlights aimed correctly?
* ( P. 635)
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 offree play?
• There should not be any strange sounds coming from the steering wheel.

5917-2. Maintenance
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Maintenance and care
RX450h_RX450hL_U
Vehicle exterior
ItemsCheck 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 mainte- nance schedule?
• The wheel nuts should not be loose.
Windshield wipers/
rear window wiper
•The wiper blades should no t show any signs of crack-
ing, splitting, wear, contamination or deformation.
• The wiper blades should clear the windshield/rear
window without streaking or skipping.
WARNING
■If the hybrid system is operating
Turn the hybrid system off and ensure that there is adequate ventilation before per-
forming maintenance checks.

5927-2. Maintenance
RX450h_RX450hL_U
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.
●When the 12-volt battery is disconnected or discharged
Readiness codes that are set duri ng ordinary driving are erased.
Also, depending on your driving habits , the readiness codes may not be com-
pletely 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 pr epare the vehicle for re-testing.
Emission inspection and maintenance (I/M) programs
Some states have vehicle emission in spection programs which include OBD
(On Board Diagnostics) checks. The OBD system monitors the operation of
the emission control system.
If the malfunction indicator lamp comes on
Your vehicle may not pass the I/M te st in the following situations:
When the malfunction indicator lamp still remains on after several driv-
ing trips
If your vehicle does not pass the I/M test

5957-3. Do-it-yourself maintenance
7
Maintenance and care
RX450h_RX450hL_U
Pull the hood lock release lever.
The hood will pop up slightly.
Pull up the auxiliary catch lever and
lift the hood.
Hood
Release the lock from the inside of the vehicle to open the hood.
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WARNING
■Pre-driving check
Check that the hood is fully closed and locked.
If the hood is not locked properly, it may op en while the vehicle is in motion and cause
an accident, which may result in death or serious injury.

5987-3. Do-it-yourself maintenance
RX450h_RX450hL_U
With the engine at operating temperatur e and turned off, check the oil level on
the dipstick.
■Checking the engine oil
Park the vehicle on level ground. Afte r 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 dif-
fer depending on the type of vehi-
cle or engine.
Wipe the dipstick and reinsert it fully.
Engine oil
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