2012 Lexus GX460 cooling

392
GX460_U.S.A. (OM60J00U)
3-1. Using the air conditioning system and defogger
Front automatic air conditioning system
Air outlets and fan speed are automatically adjusted according to the tem-
perature setting.
Vehicles with a navigation system
Refer to the “Navigation System Owner’s Manual”.
Vehicles without a navigation system
Control panel (vehicles without a rear automatic air conditioning
system)
Automatic mode button
Off button
Cooling and dehumidification function on/off button
Air outlet selector button
Micro dust and pollen filter
mode button
Passenger’s side temperature
control button
Dual mode button
Outside/recirculated air mode button
Windshield defogger button
Driver’s side
temperature control button
Fan speed control button

393
3-1. Using the air conditioning system and defogger
3
Interior features
GX460_U.S.A. (OM60J00U)
Control panel (vehicles with a rear automatic air conditioning sys-
tem)
Automatic mode button
Off button
Cooling and dehumidification function on/off button
Air outlet selector button
Micro dust and pollen filter mode button
Front passenger’s side temperature control button3 zone mode button
Outside/recirculated air mode button Windshield defogger button
Driver’s side temperature
control button
Fan speed control button
Rear automatic air
conditioning on/off button
Rear passenger’s side
temperature control
button

394
3-1. Using the air conditioning system and defogger
GX460_U.S.A. (OM60J00U)
Multi-information display (Accessory meters)
Driver’s side temperature displayFront passenger’s side temperature display
Rear passenger’s side temperature display
(vehicles with a rear automatic air conditioning system)
Cooling and dehumidification function on/off display
Fan speed displayAir outlet display

405
3-1. Using the air conditioning system and defogger
3
Interior features
GX460_U.S.A. (OM60J00U)
■Switching between outside air and recirculated air modes
Recirculated air mode or outside air mode may be automatically switched to in
accordance with the temperature setting, the inside temperature, outside tempera-
ture, etc.
■Using the system in recirculated air mode
The windows will fog up more easily if the recirculated air mode is used.
■Window defogger feature
Recirculated air mode may automatically switch to
(outside air) mode in situ-
ations where the windows need to be defogged.
■Automatic mode for air intake control (vehicles with a rear automatic air condi-
tioning system)
In automatic mode, the system detects exhaust gas and other pollutants and auto-
matically switches between outside air and recirculated air modes.
When the air conditioning is off, and the fan is operating, turning automatic mode
on will activate the air conditioning system.
■Micro dust and pollen filter
●In order to prevent the windows from fogging up when the outside air is cold,
the following may occur.
• Outside air mode does not switch to (recirculated air) mode.
• The air conditioning system operates automatically.
• The operation cancels after 1 minute.
●In rainy weather, the windows may fog up. Press .
■When outside air temperature is below 32 °F (0 °C)
The cooling and dehumidification function may not operate even when the “A/C”
button is pressed.
■When the “A/C ON” in the multi-information display (accessory meter) flashes
Press
the “A/C” button and turn off the cooling and dehumidification function and
turn it on again. There may be a problem in the air conditioning system if the indica-
tor light continues to flash. Turn the air co nditioning system off and have it inspected
by your Lexus dealer.

536
3-7. Other interior features
GX460_U.S.A. (OM60J00U)
■Items unsuitable for the cool box
●Drinks in unsealed containers
●Fragile items, perishables or anything with strong odor
●Owner’s manual, electronic devices, CDs, etc.
■When the indicator light flashes
The cool box is not operated when any of the following conditions occurs.
●When the air conditioning system is off
Turn the air conditioning system on also turns on the cool box.
●When outside air temperature is about 32 °F (0 °C) or below.
●When the “A/C ON” in the multi-information display (accessory meter)
(→ P. 392) also flashes
Press the “A/C” button to turn off the cooling and dehumidification function and
turn it on again.
If the indicator light continues to flash, there may be a malfunction in the system.
Turn the air conditioning system off and have it inspected by your Lexus dealer.
■When using the cool box lid as an armrest
Slide the cool box lid forward or backward as
needed. Slide the lid while pulling up the
upper lever to release the lock.

606
4-3. Do-it-yourself maintenance
GX460_U.S.A. (OM60J00U)
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.
■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 1 8 )
■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
4
Maintenance and care
GX460_U.S.A. (OM60J00U)
Engine compartment
Engine coolant reservoir(→P. 6 1 6 )
Engine oil level dipstick (→P. 6 1 1 )
Engine oil filler cap (→P. 6 1 2 )
Brake fluid reservoir (→P. 6 1 9 )Fuse box ( →P. 6 4 7 )
Battery ( →P. 623)
Radiator ( →P. 6 1 8 )
Condenser ( →P. 6 1 8 )
Electric cooling fan
Washer fluid tank ( →P. 6 2 7 )
Power steering fluid reservoir (→P. 621)

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4-3. Do-it-yourself maintenance
4
Maintenance and care
GX460_U.S.A. (OM60J00U)
■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, engine coolant reservoir caps, drain cock and
water pump.
If you cannot find a leak, have your Lexus dealer test the cap and check for leaks in
the cooling system.
CAUTION
■When the engine is hot
Do not remove the radiator cap.
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing serious injuries, such as burns.
NOTICE
■When adding the coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of water
and antifreeze must be used to provide proper lubrication, corrosion protection
and cooling. Be sure to read the antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to prevent it damage to parts or paint.