Toyota SIENNA 2011 Quick Reference Manual page 361

2-4. Using other driving systems
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Conditions that may trigger the system even if there is no possibility of
a collision
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When there is an object by the roadside at the entrance to a curve
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When passing an oncoming vehicle on a curve
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When driving over a narrow iron bridge
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When there is a metal object on the road surface
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When driving on an uneven road surface
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When passing an oncoming vehicle on a left-turn
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When your vehicle rapidly closes on the vehicle in front
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When there is an overhead bridge, sign or billboard ahead
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When there are excessive changes in the vehicle height (when it tilts for-
wards or backwards)
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When there is an abnormality in the radar sensor
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When an overhead metal object can be seen at the top of an uphill road
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When passing through an electronic toll collection gate (only in countries
with electronic toll collection)
When the system is activated in the situations described above, there is also
a possibility that the seat belts will retract quickly and the brakes will be
applied with a force greater than normal. When the seat belt is locked in the
restricted position, stop the vehicle in a safe place, release the seat belt and
refasten it.
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Obstacles not detected
The sensor cannot detect plastic obstacles such as traffic cones. There may
also be occasions when the radar sensor cannot detect pedestrians, ani-
mals, bicycles, motorcycles, trees, or snowdrifts.
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When there is a malfunction in the system
Warning lights will turn on or flash. (→P. 681)
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