maintenance LEXUS RX450h 2018 Owner's Manual

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RX450h_RX450hL _U_OM48F85U 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 ma intenance may affect warranty coverage.The use of Lexus repair manuals is recommended.
For details about warranty co verage, refer to th e 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

588 7-2. Maintenance
RX450h_RX450hL _U_OM48F85U■
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.■
Resetting the message indicating main tenance is required (U.S.A. only)
After the required maintenanc e is preformed according to the maintenance schedule,
please reset the message.
To reset the message, follow the procedures described below:
Select on the multi-information display.( → P. 108)
Press or of the meter control swit ch, select the “Scheduled Maintenance”
screen and then press and hold the .
Select the “Yes” and push .
A message will be displayed on the multi- information display when the reset proce-
dure has been completed. ■
Allow inspection and repairs to be performed by a Lexus dealer●
Lexus technicians are well-trained specialists and are kept up to date with the latest ser-
vice information. They are well informed about the operat ion of all systems on your
vehicle. ●
Keep a copy of the repair order. It proves that the maintenance that has been per-
formed is under warranty co verage. If any problem should arise while your vehicle is
under warranty, your Lexus dealer will promptly take care of it.
WARNING ■
If your vehicle is not properly maintained
Improper maintenance could result in seriou s damage to the vehicle and possible seri-
ous injury or death. ■
Handling of the 12-volt battery ●
Engine exhaust, some of its constituents, and a wide variety of automobile compo-
nents contain or emit chemicals known to th e State of California to cause cancer and
birth defects and other reproductive ha rm. Work in a well ventilated area.●
Oils, fuels and fluids contained in vehicles as well as waste produced by component
wear contain or emit chemicals known to the State of California 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 com-
pounds which are known to cause brain damage. Wash your hands after handling.
( → P. 605) 1
2
3
4

5897-2. Maintenance
7
Maintenance and care
RX450h_RX450hL _U_OM48F85UGeneral maintenance Listed below are the general maintenanc e 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 Items Check points
Brake fluid Is the brake fluid at the correct level? ( → P. 603)
Engine/power control unit
coolant Is the engine/power control unit coolant at the correct
level?( → P. 601)
Engine oil Is the engine oil at the correct level?( → P. 598)
Exhaust system There should not be any fumes or strange sounds.
Radiator/condenser The radiator and condenser should be free from
foreign objects. ( → P. 602)
Washer fluid Is there sufficient washer fluid?( → P. 604)
Luggage compartment Items Check points
12-volt battery Check the connections. ( → P. 605)

590 7-2. Maintenance
RX450h_RX450hL _U_OM48F85U* : Vehicles with sing le-beam headlightsVehicle interior Items Check 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 of
free play?
• There should not be any strange sounds coming
from the steering wheel.

5917-2. Maintenance
7
Maintenance and care
RX450h_RX450hL _U_OM48F85UVehicle 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 si gns 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.

592 7-2. Maintenance
RX450h_RX450hL _U_OM48F85UThe 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) programsSome 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

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RX450h_RX450hL _U_OM48F85U 7
Maintenance and care 7-3. Do-it-yourself maintenance
Do-it-yourself service precautions If you perform maintenance by yourself, be sure to follow the correct proce-
dure as given in these sections. Items Parts and tools
12-volt battery con-
dition ( → P. 605) •Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
( → P. 603) • FMVSS No.116 DOT 3 or SAE J1703 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/power con-
trol unit coolant level
( → P. 601) • “Toyota Super Long Life Coolan t” 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
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 Cool ant” is pre-mixed with 55%
coolant and 45% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
( → P. 598) • “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses ( → P. 632) • Fuse with same amperage rating as original
Headlight aim
*( → P. 635) • Phillips-head screwdriver
Light bulbs
( → P. 637) • Bulb with same number and wattage rating as original
• Flathead screwdriver •Wrench
Radiator and con-
denser ( → P. 602) ⎯
Tire inflation pres-
sure ( → P. 620) • Tire pressure gauge • Compressed air source

594 7-3. Do-it-yourself maintenance
RX450h_RX450hL _U_OM48F85U* : Vehicles with sing le-beam headlightsWasher fluid
( → P. 604) • Water or washer fluid containing antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)
WARNING
The engine compartment contains many mechan isms and fluids that may move suddenly,
become hot, or become electrically energize d. To avoid death or serious injury, observe
the following precautions. ■
When working on the engine compartment ●
Make sure that the “ACCESSORY” or “I GNITION 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 co ntrol 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 fans or radiator grille
Be sure the power switch is off.
With the 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. 602)■
Safety glasses
Wear safety glasses to prevent flying or falling material, flui d spray, etc. from getting in
your eyes.
NOTICE ■
If you remove the air cleaner filter
Driving with the air cleaner f ilter removed may cause excessive engine wear due to dirt
in the air. Items Parts and tools

5957-3. Do-it-yourself maintenance
7
Maintenance and care
RX450h_RX450hL _U_OM48F85UPull 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.1
2
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.

596 7-3. Do-it-yourself maintenance
RX450h_RX450hL _U_OM48F85U◆ Front
◆ RearPositioning a floor jack When using a floor jack, follow the inst ructions in the manual provided with
the jack and perform the operation safely.
When raising your vehicle with a floor jack, position the jack correctly.
Improper placement may damage your vehicle or cause injury.