2006 Lexus GS 300 Owners Manual - Page 1098

STARTING AND DRIVING Adaptive variable suspension control (GS430 only) When the pre −collision sensor detects an object or vehicle with which your vehicle may collide, and determines that a collision may be unavoidable, the adaptive variable suspension adjusts the damping effect on the shock absorbers and regulates the vehicle not to pitch forward so much. The adaptive variable suspension will operate when the following all conditions are met. D When the vehicle speed is about 5 km/h (3 mph) or over. D When the approaching speed in regard to the object or the vehicle exceeds about 30 km/h (18 mph). Pre−collision system failure warning G31079 "Pre−collision system warning light The light warns that there is a problem somewhere in the pre−collision system. The light comes on when the engine switch is selected in "IG−ON" mode. If the system works properly, the light goes off after a few seconds. If the light does not come on when the engine switch is selected in "IG−ON" mode, have your vehicle checked by your Lexus dealer. If the system has a problem, the pre−collision system warning light comes on or blinks. At this time, the master warning light comes on, a warning tone sounds, and either of the following messages appears on the multi−information display. D PCS DISABLED NOW D CHECK PCS 452