2007 Lexus GS350 air conditioning

198
3-2. Using the air conditioning system and defogger
Rear window and outside rear view mirror defoggers
■Operating conditions
The engine switch must be in the “IG-ON” mode.
CAUTION
■When the outside rear view mirror defoggers are on
Do not touch the rear view mirror surfaces , as they can become very hot and burn
you.
NOTICE
■To prevent battery discharge
Turn the defoggers off when the engine is not running.
These features are used to defog the rear window, and to remove rain-
drops, dew and frost from the outside rear view mirrors.
Press the button.
Press the button to turn on the
rear window and outside rear
view mirror defoggers. The
defoggers will automatically
turn off after approximately 15
minutes. Pressing the button
again also turns the defoggers
off.

264
3-4. Using the hands-free system
■When using the hands-free system
●The audio system and voice guidance are muted when making a call.
●If both parties speak at the same time it may be difficult to hear.
●If the received call volume is overly loud, an echo may be heard.
●Try to face the microphone as much as possible when speaking.
●In the following circumstances it may be difficult to hear the other party.
• When driving on unsealed roads
• When driving at high speeds
• If the window is open
• If the air-conditioning is blowing directly on the microphone
• If the air-conditioning is set to high
■Conditions under which the system will not operate
●If using a mobile phone that does not support Bluetooth®.
●If the mobile phone is switched off.
●If you are outside service range.
●If the mobile phon e is not connected.
●If the mobile phone's battery is low.
■Bluetooth® antenna
The antenna is built into the display. If the m
obile phone is behind the seat or in the
console box, or touching or covered by metal objects, connection status may dete -
riorate.
■Battery charge/Signal status
This display may not correspond exact ly w
ith the mobile phone itself.

353
3-7. Other interior features
3
Interior features
■Speech recognition information
The Lexus Link speech recognition systems use speech technology that is designed
t
o understand a wide range of speakers of American English. However, the technol -
ogy may not work as well if a regional or et h
nic 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 preset. 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 r
oof 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 s
peak 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 a
t a time for personal calling. (There
are some exceptions, such as “Advanced services” and “My number”.)
• When inputting the security codes or v
oice-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
357
4-1. Maintenance and care ........ 358Cleaning and protecting the 
vehicle exterior....................... 358
Cleaning and protecting the 
vehicle interior........................ 360 4-2. Maintenance........................... 363
Maintenance requirements............................ 363
General maintena nce ............. 365
Emission inspection and 
maintenance (I/M) 
programs ................................... 368
4-3. Do-it-yourself 
maintenance......................... 369
Do-it-yourself service 
precautions ............................... 369
Hood .............................................. 372
Positioning the jack .................. 373
Engine compartment .............. 375
Tires ................................................. 390
Tire inflation pressure ............. 400
Wheels .......................................... 404
Air conditioning filter .............. 406
Electronic key battery ............. 409
Checking and replacing 
fuses ................................................ 411
Headlight aim ............................. 429
Light bulbs..................................... 431

371
4-3. Do-it-yourself maintenance
4
Maintenance and care
CAUTION
■When working near the electric cooling fan or radiator grille
Be sure the engine switch is “OFF”.
With the engine switch in “IG-ON” mode, the electric cooling fan may automati-
cally start to run if the air conditioning is on and/or the coolant temperature is high. 
(  P. 3 8 5 )
■Safety glasses
Wear safety glasses to prevent flying or fall ing 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.

406
4-3. Do-it-yourself maintenance
Air conditioning filter
The air conditioning filter must be cleaned or changed regularly to main-
tain air conditioning efficiency.
■ Removal method
Set the air conditio ning sy
stem to recirculated mode.
The air conditioning filter case cannot be removed with the system in
the outside air mode.
Turn the engine switch to “OFF” mode.
Open the glove box and
r
emove the partition.
Remove the filter cover.
Push the tabs and remove the
filter case.
STEP1
STEP2
STEP3
STEP4
STEP5

407
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Cleaning method
If the filter is dirty, clean by blow -
ing compressed air through the
filter fr

om the downward side.
Hold the air gun 2 in. (5cm)
from the filter and blow for
approximately 2 minutes at 72
psi (500 kPa, 5.0 kgf/cm
2 or
bar).
If it is not available, have the filter
cleaned b
y your Lexus dealer.
■Replacement method
Remove the air conditioning fil-
ter from the filter case and
r
eplace it with a new one.
The “ UP” marks shown on the
filter and the filter case should
be pointing up.

408
4-3. Do-it-yourself maintenance
■Checking 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
r
equired. (For scheduled maintenance information, refer to the “Warranty and Ser -
vices Guide/Owner's Manual Supp le
ment/Scheduled Maintenance”.)
■If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary.
NOTICE
■To prevent damage to the system
●When using the air conditioning system, make sure that a filter is always installed.
●When cleaning the filter, do not clean the with water.