2011 Lexus ES 350 Owners Manual - Page 181

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2-4. Using other driving systems

2

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Obstacles not detected

The sensor cannot detect plastic obstacles such as pylons. There may also be occa-

sions when the sensor cannot detect pedestrians, animals, bicycles, motorcycles,

trees, or snowdrifts.

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The pre-collision system is operational when

●

Pre-collision seat belt (type A)

°

Vehicle speed is above 4 mph (5 km/h).

° The speed at which your vehicle is approaching the obstacle or oncoming

vehicle exceeds 19 mph (30 km/h).

°

The front occupants are wearing a seat belt.

●

Pre-collision seat belts (type B)

°

Vehicle speed is above 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 above 19 mph (30 km/h).

°

The speed at which your vehicle is approaching the obstacle or the vehicle is

greater than about 19 mph (30 km/h).

°

The brake pedal is depressed.

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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 there is a metal plate in the road in front of the vehicle on a downhill slope

●

When there is a metal object such as a sign board in front of the vehicle on an

uphill slope

●

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.