Lexus GX460 2013 Specifications /

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4-2. Maintenance
4
Maintenance and care
GX460_OM_OM60J63U_(U)
Emission inspection and maintenance (I/M) programs
Some states have vehicle emission inspection programs which include
OBD (On Board Diagnostics) checks. The OBD system monitors the oper-
ation of the emission control system.
■ If the malfunction indicator lamp comes on
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.
■ Your vehicle may not pass the I/M test in the following situations:
●When the battery is disconnected or discharged
Readiness codes that are set during ordinary driving are erased.
Also, depending on your driving habits, the readiness codes may
not be completely set.
● When the fuel tank cap is loose
The malfunction indicator lamp comes on a temporary malfunc-
tion and your vehicle may not pass the I/M test.
■ When the malfunction indicator la mp still remains on after several
driving trips
The error code in the OBD system will not be cleared unless the
vehicle is driven 40 or more times.
■ If your vehicle does not pass the I/M test
Contact your Lexus dealer to prep are the vehicle for re-testing.

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GX460_OM_OM60J63U_(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.
ItemsPa r t s a n d t o o l s
Battery condition (P. 6 3 1 )
•Warm water
• Baking soda
•Grease
• Conventional wrench
(for terminal clamp bolts)
Brake fluid level ( P. 6 2 7 )
• FMVSS No.116 DOT 3 or SAE
J1703 brake fluid
•Rag or paper towel
• Funnel (used only for adding brake
fluid)

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4-3. Do-it-yourself maintenance
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Maintenance and care
GX460_OM_OM60J63U_(U)
ItemsPa r t s a n d t o o l s
Engine coolant level (P. 6 2 4 )
• “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 cool-
ant)
Engine oil level ( P. 6 2 0 )
• “Toyota Genuine Motor Oil” or
equivalent
•Rag or paper towel
• Funnel (used only for adding
engine oil)

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4-3. Do-it-yourself maintenance
GX460_OM_OM60J63U_(U)
ItemsPa r t s a n d t o o l s
Fuses( P. 6 5 5 )• Fuse with same amperage rating as
original
Headlight aim ( P. 668)• Phillips-head screwdriver
Light bulbs( P. 6 7 0 )
• Bulb with same number and watt-
age rating as original
• Phillips-head screwdriver
•Flathead screwdriver
•Wrench
Power steering fluid level (P. 6 2 9 )
• Automatic transmission fluid
DEXRON® II or III
•Rag or paper towel
• Clean funnel
Radiator and condenser ( P. 6 2 6 )
Tire inflation pressure ( P. 643)• Tire pressure gauge
• Compressed air source
Wa s h e r f l u i d ( P. 6 3 5 )
• Water or washer fluid containing
antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)

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4-3. Do-it-yourself maintenance
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Maintenance and care
GX460_OM_OM60J63U_(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 easi ly, 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.
■When working near the electric cooling fans 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 fans may automatically start to run if the air conditioning is on and/or the
coolant temperature is high. ( P. 6 2 6 )
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting
in your eyes.

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4-3. Do-it-yourself maintenance
GX460_OM_OM60J63U_(U)
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.

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4-3. Do-it-yourself maintenance
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Maintenance and care
GX460_OM_OM60J63U_(U)
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.
Move the auxiliary catch lever
to side direction and lift the
hood.
STEP1
STEP2

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4-3. Do-it-yourself maintenance
GX460_OM_OM60J63U_(U)
Engine compartment
Engine coolant reservoir(P. 6 2 4 )
Engine oil level dipstick (P. 620)
Engine oil filler cap (P. 621)
Brake fluid reservoir (P. 6 2 7 )Fuse box ( P. 655)
Battery ( P. 6 3 1 )
Radiator ( P. 6 2 6 )
Condenser ( P. 6 2 6 )
Electric cooling fan
Washer fluid tank ( P. 635)
Power steering fluid reservoir (P. 6 2 9 )

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4-3. Do-it-yourself maintenance
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Maintenance and care
GX460_OM_OM60J63U_(U)
Engine compartment cover■ Removing the engine compartment cover
■ Installing the clips
NOTICE
■After installing an engine compartment cover
Make sure the cover is securely installed in its original position.

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4-3. Do-it-yourself maintenance
GX460_OM_OM60J63U_(U)
Engine oilWith 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 grou nd. After warming up the engine
and turning it off, wait more than five 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.
Wipe the dipstick and reinsert it fully.
Low
Full
STEP1
STEP2
STEP3
STEP4
STEP5
STEP6