maintenance Lexus GS450h 2007 Using the hands-free system (for cellular phone) / LEXUS 2007 GS450H FROM JULY 2006 PROD. (OM30A05U) Owner's Guide

364
4-3. Do-it-yourself maintenance
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.
■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, inverter, 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 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.
ItemsPa r t s a n d t o o l s
Engine oil level ( P. 3 7 1 )
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel, funnel (used
only for adding engine oil)
Fuses ( P. 4 0 3 )• Fuse with same amperage rating as
original
Headlight aim ( P. 4 1 9 )• Phillips-head screwdriver
Radiator and condenser (P. 377)
Tire inflation pressure ( P. 393)• Tire pressure gauge
• Compressed air source
Wa s h e r f l u i d ( P. 3 8 2 )
• Water washer fluid containing anti-
freeze (for winter use)
•Funnel

365
4-3. Do-it-yourself maintenance
4
Maintenance and care
CAUTION
■When working near the electric cooling fan or radiator grille
Be sure the power switch is “OFF”.
With the power switch in “IG-ON” mode, the electric cooling fan may automati-
cally start to run if the air conditioning is on and/or the coolant temperature is high. 
(  P. 377)
■Safety glasses
Wear safety glasses to prevent flying or fall ing 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.

366
4-3. Do-it-yourself maintenance
Hood
CAUTION
■Pre-driving check
Check that the hood is fully closed and locked. 
If the hood is not locked properly it may open while the vehicle is in motion and
cause an accident, which may result in death or serious injury.
Release the lock from the inside of the vehicle to open the hood.
Pull the hood lock release lever.
The hood will pop up slightly.
Lift the hood catch and lift the
hood.
STEP1
STEP2

367
4-3. Do-it-yourself maintenance
4
Maintenance and care
Positioning the jack
When raising your vehicle with the jack, position the jack correctly.
Improper placement may damage your vehicle or cause injury.
Front
Rear

368
4-3. Do-it-yourself maintenance
CAUTION
■When raising your vehicle
Make sure to observe the following to reduce the possibility of death or serious
injury.
●Do not put any part of your body or get underneath the vehicle supported only by
the jack.
Always use automotive jack stands or a solid, level, surface.
●Do not start the hybrid system while the vehicle is supported by the jack.
●Stop the vehicle on level firm ground, firmly set the parking brake and put the shift
lever in “P”.
●Make sure to set the jack properly at the jack point.
Raising the vehicle with an improperly positioned jack will damage the vehicle
and may cause the vehicle to fall off the 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
jack.

369
4-3. Do-it-yourself maintenance
4
Maintenance and care
Engine compartment
■12 volt battery
P. 3 7 9
Engine oil level dipstick 
( P. 371)
Engine oil filler cap 
( P. 3 7 2 )
Brake fluid reservoir (P. 3 7 8 )
Fuse box ( P. 403)Washer fluid tank 
( P. 382)
Gasoline engine/inverter 
coolant reservoir ( P. 3 76 )
Electric cooling fans
Condenser ( P. 377)
Radiator ( P. 377)

370
4-3. Do-it-yourself maintenance
Engine compartment cover■ Removing the cover
Front
Right-hand side
Left-hand side

371
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Installing the clips
Push up center portion
Insert
Press
Engine oil
With the engine at operating temperat ure and turned off, check the oil
level on the dipstick.
■ Checking the engine oil
Park the vehicle on level ground. After turning off the hybrid sys-
tem, wait a few 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.
STEP1
STEP2
STEP3
STEP4
STEP5

372
4-3. Do-it-yourself maintenance
Wipe the dipstick and reinsert it fully.Low
Full
■ 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.
Add engine oil slowly, checking the dipstick.
Install the filler cap, turning it clockwise until you hear a click.STEP6
Oil gradeILSAC multigrade engine oil
Oil quantity
(Low  Full)1.6 qt. (1.5 L, 1.3 Imp. qt.)
ItemsClean funnel
STEP1
STEP2
STEP3

373
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Recommended viscosity
SAE 5W-30 is the best choice for
good fuel economy, and good
starting in cold weather.
*: If SAE 5W-30 oil is not available, SAE 10W-30 oil may be used.
However, it should be replaced
with SAE 5W-30 at the next oil
change.
■ How to read oil container labels
Some oil containers are labeled wi th ILSAC certification marks that
help you to select the proper oil.
Outside temperature