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You can turn the fan on with the AUTO button next to and left of the off button and raising or lowering temp with the temp buttons located next to the nav screen (2nd picture) will effect fan speed as conditions will be adjusted automatically....
You can adjust directly be going to "CLIMATE" (touch CLIMATE button at lower right) on the NAV screen....
from the owners manual (which you may see or download at https://drivers.lexus.com/lexusdrivers/ )
Originally Posted by 430SLOwner
1. Push the “AUTO” button.
Air flow quantity, switching of the diffusers,
on−off of the air conditioning, and switching
of the air intake between RECIRCULATED
AIR and OUTSIDE AIR are automatically
adjusted. If you use the air
purifier automatic mode at the same time,
air purifying effect will be enhanced (If
equipped). The operation status is shown
by each indicator.
When one of the manual control buttons is
depressed while operating in automatic
mode, the mode relevant to the depressed
button is set. Other conditions continue to
be adjusted automatically.
Push the “OFF” button briefly to turn the
air conditioning off. If you keep the “OFF”
button pushed, the data for the air filter is
reset.
2. Use the “TEMP” or “PASSENGER
TEMP” button to set the desired temperature.
The “TEMP” or “PASSENGER TEMP”
button is used to set the desired temperature.
The temperature will be controlled on
the driver and front and rear passenger
sides (if rear air conditioning is equipped)
simultaneously or individually. The figures
on the panel indicate degrees Fahrenheit
or Centigrade.
“TEMP” button − Changes the temperature
on the driver and front and rear passenger
sides (if rear air conditioning is
equipped) simultaneously or the driver
side only.
“PASSENGER TEMP” button −
Changes the temperature on the passenger
side only.
“DUAL” button − Changes the mode of
the temperature setting.
The indicator on the “DUAL” button has
two modes:
With the indicator on − For individual
temperature setting
With the indicator off − For simultaneous
temperature setting
SETTING OPERATION − manual control
When one of the manual control buttons
is depressed while operating in
automatic mode, the mode relevant to
the depressed button is set. Other
conditions continue to be adjusted automatically.
If manual air flow selection is desired −
The outlets from which air is delivered can
be selected manually by touching the
switch. The function of each mode is as
follows:
1 Panel − Air flows mainly from the
instrument panel vents.
2 Bi−level − Air flows from both the
floor vents and the instrument panel
vents.
3 Floor − Air flows mainly from the floor
vents.
4 Floor/Windshield − Air flows mainly
from the floor vents and windshield
vents.
The selected mode is highlighted in green.
If quick heating or cooling is desired −
Push the “TEMP” or “PASSENGER
TEMP” button on either side and hold it until
the maximum figure or minimum figure
appears.
Originally Posted by 430SLOwner
For Vehicles not equipped with navigation system ...
