engine Lexus IS250C 2010 Owners Manual

384
4-2. Maintenance
10_IS250C/350C_U
Vehicle exterior
ItemsCheck points
Steering wheel
• Moves smoothly?
• Has correct free play?
• No strange noises?
ItemsCheck points
Door/trunk• Operate smoothly?
Engine hood• The lock system works properly?
Fluid leaks• Is there any leakage after parking?
Ti r e
• Inflation pressure is correct?
• Tire surfaces not worn or dam-aged?
• Tires rotated according to the maintenance schedule?
• Wheel nuts are not loose?
CAUTION
■If the engine is running
Turn the engine off and ensure that there is adequate ventilation before performing
maintenance checks.

386
10_IS250C/350C_U
4-3. Do-it-yourself maintenance
Do-it-yourself service precautions
If you perform maintenance yourself, be sure to follow the correct proce-
dure given in these sections.
ItemsParts and tools
Battery condition ( →P. 4 0 2)
•Warm water
• Baking soda
•Grease
•Conventional wrench
(for terminal clamp bolts)
Brake fluid level ( →P. 4 0 0 )
• FMVSS No.116 DOT 3 or SAE
J1703 brake fluid
•Rag or paper towel
• Funnel (used only for adding brake
fluid)
Engine coolant level ( →P. 3 9 8 )
• “Toyota Super Long Life Coolant”
or 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
engine coolant)

387
4-3. Do-it-yourself maintenance
4
Maintenance and care
10_IS250C/350C_U
CAUTION
The engine compartment contains many mechanisms and fluids that may move sud-
denly, become hot, or become electrically energized. To avoid death or serious injury,
observe the following precautions.
■When working on the engine compartment
●Keep hands, clothing, and tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, radiator, exhaust manifold, etc. right after driv-
ing as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper or rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel
and battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and
corrosive sulfuric acid.
ItemsParts and tools
Engine oil level (→P. 3 9 5 )
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel, funnel (used
only for adding engine oil)
Fuses (→ P. 4 2 7 )• Fuse with same amperage rating as
original
Tire inflation pressure ( →P. 4 1 6 )• Tire pressure gauge
• Compressed air source
Headlight aim ( →P. 4 4 2 )• Phillips-head screwdriver
Radiator and condenser ( →P. 4 0 0 )
Wa s h e r f l u i d ( →P. 4 0 5 )
• Water washer fluid containing anti-
freeze (for winter use)
•Funnel

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4-3. Do-it-yourself maintenance
10_IS250C/350C_U
CAUTION
■When working near the electric cooling fan or radiator grille
Be sure the “ENGINE START STOP” switch is OFF.
With the “ENGINE START STOP” switch in IGNITION ON mode, the electric
cooling fan may automatically start to run if the air conditioning is on and/or the
coolant temperature is high. (→P. 400)
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting
in the 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. Also a backfire could cause a fire in the engine compartment.

391
4-3. Do-it-yourself maintenance
4
Maintenance and care
10_IS250C/350C_U
CAUTION
■When raising your vehicle
Make sure to observe the following to reduce the possibility of death or serious
injury.
●Do not use the jack that was supplied with your vehicle.
●Do not put any part of your body or get underneath the vehicle supported only by
the floor jack.
Always use automotive jack stands on a solid, level, surface.
●Do not start the engine while the vehicle is supported by the floor jack.
●Stop the vehicle on level firm ground, firmly set the parking brake and put the shift
lever in P (automatic) or R (manual).
●Make sure to set the floor jack properly at the jack point.
Raising the vehicle with an improperly positioned floor jack will damage the vehi-
cle and may cause the vehicle to fall off the floor jack.
●Do not raise the vehicle while someone is in the vehicle.
●When raising the vehicle, do not place any objects on top of or underneath the
floor jack.
●When raising the vehicle, ensure that there is sufficient surrounding space. The
vehicle’s position may change slightly when lowered.
●Lift up the vehicle using a floor jack such as
the one shown in the illustration.

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4-3. Do-it-yourself maintenance
10_IS250C/350C_U
Engine compartment
IS350C
Battery (→P. 4 0 2 )
Engine oil level dipstick (→P. 395)
Engine oil filler cap (→P. 395)
Brake fluid reservoir (→P. 4 0 0 )
Fuse boxes ( →P. 4 2 7 )Washer fluid tank
(→P. 405)
Electric cooling fans
Condenser ( →P. 4 0 0 )
Radiator ( →P. 4 0 0 )
Engine coolant reservoir (→P. 398)

393
4-3. Do-it-yourself maintenance
4
Maintenance and care
10_IS250C/350C_U
IS250C
Battery (→P. 4 0 2 )
Engine oil level dipstick (→P. 395)
Engine oil filler cap (→P. 395)
Brake fluid reservoir (→P. 4 0 0 )
Fuse boxes ( →P. 4 2 7 )Washer fluid tank
(→P. 405)
Electric cooling fans
Condenser ( →P. 4 0 0 )
Radiator ( →P. 4 0 0 )
Engine coolant reservoir (→P. 398)

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4-3. Do-it-yourself maintenance
10_IS250C/350C_U
Engine compartment cover■ Removing the engine compartment cover
Front
Outside
■ Installing the clips
Press the tip of the clip against a
hard surface, such as a desk, to
allow the center part of the clip
to be pushed up.
Insert
Press

395
4-3. Do-it-yourself maintenance
4
Maintenance and care
10_IS250C/350C_U
Engine oilWith the engine at operating temperature and turned off, check the oil
level on the dipstick.
■ Checking the engine oil
Park the vehicle on level ground. After turning off the engine, wait
more than five minutes for the oil to drain back into the bottom of
the engine.
Hold a rag under the end and 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.
Wipe the dipstick and reinsert it fully. Low
Full
STEP1
STEP2
STEP3
STEP4
STEP5
STEP6

396
4-3. Do-it-yourself maintenance
10_IS250C/350C_U■
Adding engine oil
If the oil level is below or near the
low level mark, add engine oil of
the same type as already in the
engine.
Make sure to check the oil type and prepare the items needed before
adding oil.
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.
Engine oil selection→ P. 5 3 0
Oil quantity
(Low → Full)1.6 qt. (1.5 L, 1.3 Imp. qt.)
ItemsClean funnel
STEP1
STEP2
STEP3