2015 LEXUS NX300h engine

483
7Maintenance and care
NX300h_U_OM78007U 7-1. Maintenance and care
Cleaning and protecting
the vehicle exterior.................484
Cleaning and protecting
the vehicle interior ................. 488
7-2. Maintenance
Maintenance
requirements.............................. 491
General maintena nce .............. 494
Emission inspection and
maintenance (I/M)
programs .....................................497
7-3. Do-it-yourself maintenance
Do-it-yourself service
precautions ................................ 498
Hood .............................................. 500
Positioning a floor jack .............. 501
Engine compartment ...............502
12-volt battery............................... 512
Tires ................................................... 516
Tire inflation pressure ............... 525
Wheels ........................................... 528
Air conditioning filter ...............530
Electronic key battery .............. 532
Checking and replacing
fuses ..............................................534
Light bulbs.....................................538

4937-2. Maintenance
7
Maintenance and care
NX300h_U_OM78007U A message is displayed on the multi-informa-
tion display.
WA R N I N G ■
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 harm. 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. 5 1 2 ) 5

494 7-2. Maintenance
NX300h_U_OM78007UGeneral 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 qualifie d service shop for
advice.
Engine compartment Items Check points
Brake fluid Is the brake fluid at the correct level? (  P. 5 1 0 )
Engine/power control unit
coolant Is the engine coolant at the correct level? (  P. 5 0 8 )
Engine oil Is the engine oil at the correct level? (  P. 5 0 4 )
Exhaust system There should not be any fumes or strange sounds.
Radiator/condenser The radiator and condenser should be free from
foreign objects. (  P. 5 0 9 )
Wa s h e r f l u i d Is there sufficient washer fluid? (  P. 511)
Luggage compartment Items Check points
12-volt battery Check the connections. (  P. 5 1 2 )

496 7-2. Maintenance
NX300h_U_OM78007U 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 si gns of fluid leakage after
the vehicle has been parked.
Ti r e s • 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.
WA R N I N G ■
If the hybrid system is operating
Turn the hybrid system off and ensure that there is adequate ventilation before per-
forming maintenance checks.

498 7-3. Do-it-yourself maintenance
NX300h_U_OM78007UDo-it-yourself service precautions If you perform maintenance by yourself, be sure to follow the correct proce-
dure as given in these sections. Items Pa r t s a n d t o o l s
12-volt battery con-
dition (  P. 5 1 2 ) •Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
(  P. 5 1 0 ) • 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. 5 0 8 ) • “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
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. 5 0 4 ) • “Toyota Genuine Motor Oil” or equivalent
•Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses (  P. 5 3 4 ) • Fuse with same amperage rating as original
Light bulbs
(  P. 5 3 8 ) • Bulb with same number and wattage rating as original
• Phillips-head screwdriver •Flathead screwdriver
•Wrench
Radiator and con-
denser (  P. 5 0 9 ) 
Tire inflation pres-
sure (  P. 5 2 5 ) •Tire pressure gauge • Compressed air source
Wa s h e r f l u i d
(  P. 511) • Water or washer fluid containi ng antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)

4997-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U WA R N I N G
The engine compartment contains many mechanisms and fluids that may move suddenly,
become hot, or become electrically energized. To avoid death or serious injury, observe
the following precautions. ■
When working on the engine compartment ●
Make sure that the indicator on the power switch 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 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. 5 0 9 )■
Safety glasses
Wear safety glasses to prevent flying or fallin g 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.

502 7-3. Do-it-yourself maintenance
NX300h_U_OM78007UEngine compartment
■
12-volt battery
 P. 5 1 2Fuse box (  P. 5 3 4 )
Engine coolant reservoir
(  P. 5 0 8 )
Engine oil filler cap (  P. 505)
Power control unit coolant reservoir
(  P. 5 0 8 )
Brake fluid reservoir (  P. 5 1 0 ) Radiator (  P. 5 0 9 )
Condenser (  P. 5 0 9 )
Electric cooling fans
Engine oil level dipstick
(  P. 5 0 4 )
Wa s h e r f l u i d t a n k (  P. 5 1 1 )1
2
3
4
5 6
7
8
9
10

5037-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U ■
Removing the engine compartment cover
■
Installing the clips
Insert
PressEngine compartment cover
1
2
NOTICE ■
After installing an engine compartment cover
Make sure that the cover is securely installed in its original position.