air condition Lexus GX470 2007 Using other driving systems /

168
3-1. Using the air conditioning system and defogger
Rear cooler system
NOTICE
■To prevent battery discharge
Do not leave the rear cooler on longer than necessary when the engine is off.
Rear cooler vents
Fan speed control button
Push either side to adjust the fan speed.
“AUTO” mode: Fan speed is automati cally adjusted. Can only be set
if the front air conditioning fan speed is set to “AUTO”.
“REAR COOL” button
Turns the rear cooler on and off.
Does not operate if the front air conditioning is off.
“TEMP” (temperature control) button
Push either side to adjust the temperature.
The rear cooler temperature can be adjusted to within 10°F
( 5°C) of the front air conditioning temperature.

169
3-1. Using the air conditioning system and defogger
3
Interior features
Rear window and outside rear view mirror defoggers
These features are used to defog the rear window, and to remove rain-
drops, dew and frost from the outside rear view mirrors.
■Rear window defogger
With navigation system
ON/OFF
Without navigation system ON/OFF
■ Outside rear view mirror defogger
ON/OFF

170
3-1. Using the air conditioning system and defogger
■Operating conditions
The ignition switch must be in the “ON” position.
■Auto shut-off function
The system will automatically shut off after operating for 15 minutes.
CAUTION
■When the outside rear view mirror defoggers are on
Do not touch the rear view mirror surfac es, as they can become very hot and burn
you.
NOTICE
■To prevent battery discharge
Turn the defoggers off when the engine is off.

267
3-6. Other interior features
3
Interior features
■Speech recognition information
The Lexus Link speech recognition systems use speech technology that is designed
to understand a wide range of speakers of American English. However, the technol-
ogy may not work as well if a regional or ethnic accent is encountered. If the speech
recognition system does not work properly, refer to the following.
●The system does not recognize your command properly if noise is present. Per-
form the following to improve voice command recognition.
• Turn down or off the air conditioning system.
• Slow down to reduce wind noise.
• Close the windows and the moon roof to block outside noise.
• Have all occupants be quiet so that the system does not recognize their con- versation as a command.
●When to speak
Say a command within 5 seconds after the system prompts you to speak.
●How to speak
• Speak forcefully and clearly.
• Speak calmly and naturally.
• The driver should speak while facing forward, and the passenger should
speak facing the inside rear view mirror.
• Avoid speaking with a rising intonati on. Use a flat or falling intonation.
●Tips for one-word commands
• The system recognizes only one word at a time for personal calling. (There
are some exceptions, such as “Advanced services” and “My number”.)
• When inputting the security codes or voice-activated keypad number, you
must say them one digit at a time. When inputting a phone number, the
speech recognition system can recognize 7, 10, and 11-digit numbers as well
as the number 911.

Maintenance and care4
271
4-1. Maintenance and care ......... 272Cleaning and protecting the vehicle exterior........................ 272
Cleaning and protecting the vehicle interior.......................... 274 4-2. Maintenance........................... 277
Maintenance requirements............................. 277
General maintena nce ............. 279
Emission inspection and maintenance (I/M)
programs ................................... 282
4-3. Do-it-yourself maintenance......................... 283
Do-it-yourself service precautions ............................... 283
Hood .............................................. 286
Engine compartment .............. 287
Tires ................................................. 302
Tire inflation pressure .............. 309
Wheels ........................................... 313
Air conditioning filter ............... 315
Wireless remote control battery .......................................... 317
Rear seat entertainment system controller..................... 319
Checking and replacing fuses .............................................. 321
Light bulbs..................................... 331

285
4-3. Do-it-yourself maintenance
4
Maintenance and care
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.
■When working near the electric cooling fan or radiator grille
Be sure the ignition switch is in “LOCK”.
With the ignition switch is in the “ACC” or “ON” position, the electric cooling fan
may automatically start to run if the air conditioning is on and/or the coolant tem-
perature is high. ( P. 295)
■Safety glasses
Wear safety glasses to prevent flying or falling 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.

308
4-3. Do-it-yourself maintenance
CAUTION
■When inspecting or replacing tires
Observe the following precautions to prevent accidents. Failure to do so may cause
damage to parts of the drive train, as well as dangerous handling characteristics,
which may lead to fatal or injury accidents.
●Do not mix tires of different makes, models, tread patterns or tread wear.
●Do not use tire sizes other than those recommended by Lexus.
●Do not mix radial, bias-belted, or bias-ply tires.
●Do not mix summer, all season and winter tires.
NOTICE
■Repairing or replacing tires, wheels and tire pressure warning valves and trans-
mitters
●When removing or fitting the wheels, tires or the tire pressure warning valve and
transmitter, contact your Lexus dealer as the tire pressure warning valve and
transmitter may be damaged if not handled correctly.
●When replacing tires, make sure also to replace the tire pressure warning valve
and transmitter grommets.
■Do not use puncture sealant sprays to repair flats
Puncture sealant sprays may damage tire pressure warning valves and transmitters.
■Driving on rough roads
Take particular care when driving on roads with loose surfaces or potholes.
These conditions may cause losses in tire inflation pressure, reducing the cushion-
ing ability of the tires. In addition driving on rough roads may cause damage to the
tires themselves, as well as the vehicle’s wheels and body.
■If tire inflation pressures become low while driving
Do not continue driving, or your tires and/or wheels may be ruined.

312
4-3. Do-it-yourself maintenance
CAUTION
■Proper inflation is critical to save tire performance
Keep your tires properly inflated. Otherwise, the following conditions may occur
and result in an accident causing death or serious injury.
●Excessive wear
●Uneven wear
●Poor handling
●Possibility of blowouts resulting from overheated tires
●Poor sealing of the tire bead
●Wheel deformation and/or tire separation
●A greater possibility of tire damage from road hazards
NOTICE
■When inspecting and adjusting tire inflation pressure
Be sure to reinstall the tire valve caps.
Without the valve caps, dirt or moisture could get into the valve and cause air leak-
age, which could result in an accident. If the caps have been lost, replace them as
soon as possible.

315
4-3. Do-it-yourself maintenance
4
Maintenance and care
Air conditioning filter
The air conditioning filter must be changed regularly to maintain air condi-
tioning efficiency.
Turn the ignition switch to the “LOCK” position.Open the glove box and
unhook the clip.
Push in each side of the glove
box to disconnect the claws.
Remove the filter case.STEP1
STEP2
STEP3
STEP4

316
4-3. Do-it-yourself maintenance
■Changing interval
Inspect and replace the air conditioning filter according to the maintenance sched-
ule. In dusty areas or areas with heavy traffic flow, early replacement may be
required. (For scheduled maintenance information, refer to the “Warranty and Ser-
vices Guide/Owner's Manual Supplement/Scheduled Maintenance”.)
■If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary.
NOTICE
■When using the air conditioning system
Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the system.
Remove the air conditioning fil-
ter from the filter case and
replace it with a new one.
The “UP” marks shown on the
filter and the filter case should
be pointing up.
STEP5