Lexus RX 450h 2012 Owner's Manual page 284

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The pre-collision system is operational when
Pre-collision seat belts linked to the radar sensor
• Vehicle speed is greater than about 4 mph (5 km/h).
• The speed at which your vehicle is approaching the obstacle or oncoming
vehicle is greater than about 19 mph (30 km/h).
• The front occupants are wearing a seat belt.
Pre-collision seat belts in the event of sudden braking or skidding
• Vehicle speed is greater than about 19 mph (30 km/h).
• The system detects sudden braking or skidding.
• The front occupants are wearing a seat belt.
Pre-collision brake assist
• Vehicle speed is greater than about 19 mph (30 km/h).
• The speed at which your vehicle is approaching the obstacle or the vehicle
running ahead of you is greater than about 19 mph (30 km/h).
• The brake pedal is depressed.
Conditions that may trigger the system even if there is no possibility of collision
When there is an object by the roadside at the entrance to a curve
When passing an oncoming vehicle on a curve
When driving over a narrow iron bridge
When there is a metal object on the road surface
When driving on an uneven road surface
When passing an oncoming vehicle on a left-turn
When your vehicle rapidly closes on the vehicle in front
When a grade separation/interchange, sign, billboard, or other structure
appears to be directly in the vehicle's line of travel
When climbing a steep hill causes an overhead billboard or other metallic struc-
ture to appear directly in the vehicle's line of travel
When an extreme change in vehicle height occurs
When the axis of the radar is out of adjustment
When passing through certain toll gates
When driving on a bridge
2-4. Using other driving systems
2
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