2006 LEXUS LS430 cooling

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3-1. Using the air conditioning system and defogger
Rear air conditioning controls
Using the automatic mode
Push or .
If the front air conditioner is switched off, only the fan, not the cooling,
will operate.
Adjust the temperature setting using .
The temperature of front seats will also change.
Rear side vents
Turning the knob fully back closes
the air outlets.
Auto
The air purifier system will function
automatically.
Off
Air flow control
Child lock button
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3-5. Other interior features
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Interior features
CAUTION
■Burns/ excessive cooling
●The following passengers should take extra care to avoid burns:
• Babies, small children, elderly persons, si
ck or physically disabled persons.
• Persons who have sensitive skin.
• Exhausted persons.
• Persons who have taken alcohol or drug s whi
ch induce sleep (sleeping drugs,
cold remedies, etc.)
●Do not use a blanket or cushion on the seat. Using the climate control seat with
a blanket or cushion increases the temperature of the seat and may lead to over -
heating.
●Take care not to overuse the cooling function, as it may cool the above men -
tioned passengers excessively minor burns and overheating/ excessive cooling
NOTICE
■To prevent seat heater damage
Do not put unevenly weighted objects on the
seat and do not stick sharp objects
(needles, nails, etc.) into the seat.
■To prevent battery discharged
Turn the switches off when the engine is not running.

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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.

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4-3. Do-it-yourself maintenance
Engine coolant
The coolant level is satisfactory if it is between the “FULL” and “LOW” lines on
the reservoir when the engine is cold.
Reservoir cap
Full line
Low line
If the level is on or below the
“LOW” line, add coolant up to the
“Full” line.
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■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, engine c
oolant filler cap, radiator cap and drain
cock and water pump. If you cannot find a leak, have your Lexus dealer test the cap
pressure and check for leaks in the cooling system.
■Coolant type selection
Use of improper coolants may dama ge y
our engine cooling system.
Only use “Toyota Super Long Life Coolant” or similar hig
h quality ethylene glycol
based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life
hybrid organic acid technology. (Coolant wi th long-life hybrid organic acid technol-
ogy is a combination of low phosphates and organic acids.)
For the USA : “Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% di
stilled or deionized water. (Protects to: -35 C (-31F))
For Canada : “Toyota Super Long Life Coolant” is a mixture of 55% coolant and 4
5% distilled or deionized water. (Protects to: -42 C (-44F))
Please contact your Lexus dealer for further details.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
Radiator and condenser
Check the radiator and condenser and clear any foreign objects. If the parts are
extremely dirty or you are not sure of their condition, have your vehicle checked
by your Lexus dealer.
CAUTION
■When the engine is hot
Do not remove the radiator cap. The cooling system may be under pressure and
ma

y spray hot coolant if the cap is removed, causing burns or other injuries.
Do not touch the radiator or condenser, as they may be not and may cause burns.
NOTICE
■When adding engine coolant
Do not use plain water alone.
■If you spill coolant:
Be sure to wash it off with water to prevent damage to parts or point.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
■Engine compartment fuse box
FuseAmpereCircuit
ST30Starting system
D/C CUT20All components in "DOME", "MPX-B1",
and "MPS-B3"
A LT- S5Charging system
FuseAmpereCircuit
H-LP R LWR15Right-hand headlight (low beam)
H-LP L LWR15Left-hand headlight (low beam)
EFI NO.27. 5Multiport fuel injection system/sequential
multiport fuel injection system
S TA7. 5Multiport fuel injection system/sequential
multiport fuel injection system
INJ10Multiport fuel injection system/sequential
multiport fuel injection system
IGN7. 5Multiport fuel injection system/sequential
multiport fuel injection system
FR IG7. 5
Electric cooling fan, Headlight cleaner,
Charging system, Starting system, Rear
window defogger
A/C IG7. 5Air conditioning system
WIP30Windshield wiper
A/C15Fog lights
WA S H E R20Windshield washer
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5-2. Steps to take in an emergency
NOTICE
■To prevent damaging the vehicle
Do not pull- or push-start the vehicle, because the three-way catalytic converter
ma
y overheat and become a fire hazard.
■When handling jumper cables
Be careful that the jumper cables do not bec
ome tangled in the cooling fan or any
of the belts when connectin g or disconnecting them.

5
When trouble arises
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5-2. Steps to take in an emergency
If your vehicle overheats
If your engine overheats
Stop the vehicle in a safe place and turn off the automatic climate
control.
Check to see if steam is coming out from under the hood.
If you see steam: 
Stop the engine.
If you do not see steam: 
Leave the engine running and carefully lift the hood.
Check to see if the cooling fan is operating.
If the fan is operating: 
Wait until the temperature of the engine (shown in the instrument clus -
ter) begins to fall and then stop the engine.
If the fan is not operating: 
Stop the engine and call your local Lexus dealer.
After the engine has cooled down
sufficiently, check the level of
engine coolant and inspect the
radiator core (radiator) for any
leaks.