Rear Cooling; Air Purification - Lexus 2004 LS430 Owner's Manual

AIR CONDITIONING
These are the controls added to the front air conditioning when
your vehicle is equipped with a rear air conditioning. The
controls for the rear passengers and for the front passengers
both work the same, so operation can be made with the
controls on either panel.
(a) Controls and Functions
This rear air conditioning is equipped with dustproof and
deodorant filter with photocatalyst. When light in the
xenon tube (ultraviolet rays) hits the filter, odious
ingredients adsorbed in the filter are oxidized and
decomposed to deliver clean air in the interior.
REAR AIR CONDITIONING ON-OFF -
Push the "AUTO" button to turn the air conditioning on,
and push the "OFF" button to turn it off.
AIR FLOW CONTROL -
The mode changes every time the "LO HI A/C" button is
pushed.
AUTO mode - Turns the fan operation to automatic.
LO speed mode - Turns the fan at low speed.
HI speed mode - Turns the fan at high speed.
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(b) Rear Cooling
1. Turn the front air conditioning on. The rear cooler will not
turn on if the front air conditioning is off.
2. Turn the rear air conditioning on. The fan speed and rear
cooler are adjusted automatically.
3. Use either of the "LO HI A/C" buttons to adjust the desired
fan speed and the rear cooler. Each indicator light shows
which mode is now selected.
(c) Air Purification
The air purifier operates whenever the rear air conditioning or
the rear fan operation is on, regardless of front air conditioning
activation.