2005 Lexus LS 430 Owners Manual - Page 400

STARTING AND DRIVING ELECTRONICALLY MODULATED AIR SUSPENSION This electronically modulated air suspension adjusts the damping effect on the shock absorbers and the vehicle height. This adjustment is automatically made in response to the driving conditions to provide good riding comfort and stability in all driving conditions. Normal mode: Suitable for driving on roads with a normal surface. High mode: Suitable for driving on rough roads which are unsurfaced or continually bumpy. The damping effect is set slightly firmer in the high mode. So you may feel the vibration of the vehicle compared to in the normal mode. However, this does not mean a malfunction in the system. We recommend you use a normal mode in normal driving. To change the mode, push the selector switch. Normal mode: The vehicle height remains at normal height at all driving speeds. (a) Vehicle height adjustment 31L343 High mode: The vehicle height switches between the following two vehicle heights according to the driving conditions: Vehicle height Normal Driving condition Medium and high speed driving Low speed driving " 1 High position 2 Normal position High This system maintains a stable vehicle height, regardless of occupants and luggage weight. Select either of the following modes using a selector switch. 361