2006 LEXUS LS430 maintenance

255
4-2. Maintenance
4
Maintenance and care
Emission inspection and maintenance (I/M) programs
Some 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
The OBD system determines that a pr
oblem 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.
■ Y
our vehicle may not pass the I/M test:
●When the battery is disconnected or discharged
Readiness codes that are set during or
dinary 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 co mes on as tempor
ary malfunction
and your vehicle may not pass the I/M test.
■ When the malfunction indicator lamp goes off after se
veral driving
trips
The error code in the OBD system wi ll not be clear
ed unless the vehi-
cle is driven 40 or more times.
■ If y
our vehicle does not pass the I/M test
Contact your Lexus dealer to prep ar
e the vehicle for re-testing.

256
4-3. Do-it-yourself maintenance
Do-it-yourself service precautions
Do-it-yourself maintenancePa r t s a n d t o o l s
Battery condition 
( P. 2 7 3 )
•Warm water
• Baking soda
•Grease
• Conventional wrench 
(for terminal clamp bolts)
Blade type fuses
( P. 2 9 8 )
• Fuse with same amperage rating as original
Brake fluid level 
(P. 2 7 0 )
• FMVSS No.116 DOT 3 or SAE J1703 brake
fluid
•Rag or paper towel
• Funnel (used only for adding brake fluid)
Cartridge type fuses 
(P. 3 0 9 )
• Genuine Lexus fuse or equivalent with same
amperage rating as original
Engine coolant level 
(P. 2 6 8 )
• “Toyota Super Long Life Coolant” or similar
high quality ethylene glycol based non-silicate,
non-amine, non-nitrate and non-borate coolant
with long-life hybrid organic acid technology.
“Toyota Super Long Life Coolant” is pre-mixed
with 50% coolant and 50% de-ionized water
(vehicles sold in the U.S.A.), 55% coolant 45%
de-ionized water (vehicles sold in Canada).
• Funnel (used only for adding coolant)
Engine oil level
( P. 2 6 3 )
• “Toyota Genuine Motor Oil” or equivalent
•Rag or paper towel
• Funnel (used only for adding oil)
If you perform maintenance yourself, be sure to follow the correct procedure
given in these sections.

257
4-3. Do-it-yourself maintenance
4
Maintenance and care
Do-it-yourself maintenancePa r t s a n d t o o l s
Headlight aim 
( P.311)
• Phillips-head screwdriver
Power steering fluid
level
(P. 2 7 2 )
• Automatic transmission fluid DEXRON ll or
lll
• Rag or paper towel
• Funnel (used only for adding power steering fluid)
Radiator and 
condenser 
(P. 2 6 9 )

Tire inflation pressure 
(P. 2 8 3 )
• Tire pressure gauge
• Compressed air source
Wa s h e r f l u i d 
(P. 2 7 7 )
• Washer fluid containing antifreeze 
(for winter use)
• Funnel (used only for adding washer fluid)

258
4-3. Do-it-yourself maintenance
CAUTION
The engine compartment contains many mechanisms and fluids that many move
suddenly, become hot, or become electrically energized. To avoid death or serious
injury:
■When working in 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 and power steering
fluid reservoir, 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.
■When the engine is running
Perform maintenance checks with adequate ventilation
■When working near the electric cooling fan or radiator grill:
Be sure the ignition is off. With the igni tion on, th
e electric cooling fan may automat-
ically start to run if the air conditioning is on and/
or if the coolant temperature is
high. ( P.262 )
■When working on or under the vehicle:
●Do not get under the vehicle with just the jack supporting it. 
Always use automotive jack stands or other solid supports.
●Use eye protection to prevent flying or falling material, fluid spray, etc. from get -
ting in your eyes.

259
4-3. Do-it-yourself maintenance
4
Maintenance and care
NOTICE
■If you remove the engine air filter:
Driving with the engine air filter removed may cause e
xcessive engine wear due to
dirt in the air. 
Also, a backfire could cause a fire in the engine compartment.

260
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
ca
use an accident, which may result in death or serious injury.
Lift the hood to inspect engine components and fluid levels.
Pull the hood release lever.
The hood will pop up slightly.
Lift the hood catch and lift the hood.

261
4-3. Do-it-yourself maintenance
4
Maintenance and care
Positioning the jack
CAUTION
■When raising your vehicle:
Make sure to observe the following to reduce the possibility of death or serious
injur
y.
• Do not put any part of your body or get underneath the vehicle supported only b
y the jack. Always use automotive jack stands or a solid, level, surface.
• Do not start or run the engine while your vehicle is supported by the jack.
• Stop the vehicle on level firm ground, firmly
set the parking brake and put the
selector lever in “P” position.
• Make sure to set the jack properly at the jack point. 
Raising the vehicle with an improperly positioned jack will damage the vehicle
or
may allow the vehicle to fall off the jack.
• Do not raise the vehicle with someone in the vehicle.
• When raising the vehicle, do not place an y ob
jects on top of or underneath the
jack.
When raising your vehicle, position the jack correctly.
Improper placement may damage your vehicle or cause injury.
Dummy

262
4-3. Do-it-yourself maintenance
Engine compartment
Brake fluid reservoir
( P.
2 7 0 )
Fuse Box ( P.298 , P.309 )
Engine oil filler cap 
( P.
2 6 3 )
Engine oil level dipstick 
( P.
2 6 3 )
Washer fluid tank ( P.277 ) Radiator
Condenser
(P.
2 6 9 )
Engine coolant reservoir 
( P.
2 6 8 )
Power steering fluid 
reservoir ( P
.272)
Battery 
(P.
2 7 3 )
1
2
3
4
5
6
7
8
9
10