Lexus IS220d 2012 Manual page 244

2-4. Using other driving systems

The pre-crash safety system is operational when

Pre-crash seat belts (type A):
• Vehicle speed is above 5 km/h (4 mph).
• The speed at which your vehicle is approaching the obstacle or oncom-
ing vehicle exceeds 30 to 40 km/h (19 to 25 mph).
• The front occupants are wearing a seat belt.

Pre-crash seat belts (type B):
• Vehicle speed exceeds 30 km/h (19 mph).
• The system detects sudden braking or skidding.
• The front occupants are wearing a seat belt.

Pre-crash brake assist:
• Vehicle speed is above 30 km/h (19 mph).
• The speed at which your vehicle is approaching the obstacle or the
vehicle running ahead of you is greater than 30 to 40 km/h (19 to 25
mph).
• The brake pedal is depressed.

Pre-crash braking:
• The pre-crash braking function is activated.
• Vehicle speed is above 15 km/h (10 mph).
• The relative speed difference between your vehicle and another vehi-
cle that is forward of your vehicle, or the speed at which your vehicle
is approaching an obstacle is greater than 15 km/h (10 mph).

Conditions that may trigger the system even if there is no possibility of col-
lision

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 right-turn (right-hand drive
countries) or left-turn (left-hand drive countries)

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.
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IS250/220d/200d_EE