The Pre-Collision System Is Operational When; Conditions That May Trigger The System Even If There Is No Danger Of A Collision - Lexus 2016 IS 200t Service Manual

The pre-collision system is operational when

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The pre-collision system is enabled and the following conditions are met:
Pre-collision warning:
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• Vehicle speed is greater than about 10 mph (15 km/h).
• The speed at which your vehicle is approaching the obstacle or the vehicle running
ahead of you is greater than about 10 mph (15 km/h).
Pre-collision brake assist:
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• The VSC system is not disabled.
• 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.
Pre-collision braking:
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• The VSC system is not disabled.
• Vehicle speed is greater than about 10 mph (15 km/h).
• The speed at which your vehicle is approaching the obstacle or the vehicle running
ahead of you is greater than about 10 mph (15 km/h).
Suspension control (vehicles with Adaptive Variable Suspension System):
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• Vehicle speed is greater than about 4 mph (5 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).

Conditions that may trigger the system even if there is no danger of a collision

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In any of the following situations where the frontal area of the radar sensor is interrupted,
the radar sensor may detect possibility of a frontal collision and the system may be acti-
vated.
When passing by an oncoming vehicle in a curve or a turn to the right or the left.
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When rapidly approaching an obstacle ahead (e.g. preceding vehicle, toll gate barrier,
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etc.)
When there is a structural object (billboard, low ceiling, fluorescent light, etc.) above
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the uphill road ahead
When driving on a narrow road or through under a low overhead structure (bridge,
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tunnel, fly-under, etc.)
When driving on an uneven road surface
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When there is a metal object, bump, or protrusion on the road surface
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When vehicle' s front part is raised or lowered depending on loading conditions
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When the direction of radar sensor is misaligned by strong impact applied on an area
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around the radar sensor, etc.
When there is an obstacle (guard rail, etc.) by the roadside at the entrance to a curve
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When the front of your vehicle is pointing upwards (caused by putting a heavy load in
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the trunk etc.)
When the system is activated in the situations described above, there is also a possibility
that the brakes may be applied with a force greater than normal.
IS350/300/200t_U (OM53D18U)
4-5. Using the driving support systems
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