Vehicle Height Adjustment Prohibition Control
WARNING: This page is about a different car, the 2002 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
When the vehicle is raised on a jack or is being towed, the vehicle adjustment can be prohibited by operating the height control switch. However, the prohibition control cancels automatically when the vehicle speed becomes higher than approximately 50 mph at the normal vehicle height, or higher than approximately 19 mph at the high or low vehicle height.