2004 Lexus LS 430 User Guide - Page 270

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. (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. (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. (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. 252