2011 Lexus LS 460 Owners Manual - Page 396

2-4. Using other driving systems n Obstacles not detected The sensor cannot detect plastic obstacles such as pylons. There may also be occasions when the radar sensor cannot detect pedestrians, animals, bicycles, motorcycles, trees, or snowdrifts. n The camera sensor cannot detect obstacles in the following situations. l The camera sensor is directly receiving intense light, such as sunlight. l Visibility is poor because of the bad weather or other reasons. l The sensor temperature is extremely high. n The pre-collision system is operational when l Pre-crash seat belts: Operating conditions A • Vehicle speed is above 4 mph (5 km/h). • The relative speed difference between your vehicle and another vehicle that is forward of your vehicle, or the speed at which your vehicle is approaching an obstacle is greater than 19 mph (30 km/h). • The front occupants are wearing a seat belt. Operating conditions B • Vehicle speed exceeds 19 mph (30 km/h). • The system detects sudden braking or skidding. • The front occupants are wearing a seat belt. l Pre-collision brake assist: • Vehicle speed is above 19 mph (30 km/h). • The relative speed difference between your vehicle and another vehicle that is forward of your vehicle, or the speed at which your vehicle is approaching an obstacle is greater than 19 mph (30 km/h). • The brake pedal is depressed. l Pre-collision braking: • The pre-collision braking off switch is not pressed. • Vehicle speed is above 10 mph (15 km/h). • The relative speed difference between your vehicle and another vehicle that is forward of your vehicle, or the speed your vehicle is approaching an obstacle is greater than 13 mph (20 km/h). 300