Toyota 2014 Sienna Manual page 356

2-4. Using other driving systems
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Conditions under which the Rear Cross Traffic Alert function may not
function correctly
The Rear Cross Traffic Alert function may not detect vehicles correctly in the
following conditions:
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When ice or mud etc. is attached to the rear bumper
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During bad weather such as heavy rain, fog, snow etc.
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When multiple vehicles approach continuously
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Shallow angle parking
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When a vehicle is approaching at high speed
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When parking on a steep incline, such as hills, a dip in the road etc.
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Directly after the BSM main switch is set to on
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When towing a trailer
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Rear Cross Traffic Alert buzzer hearing
Rear Cross Traffic Alert function may be difficult to hear over loud noises
such as high audio volume.
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SIENNA_OM_OM45483U_(U)
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Vehicles that the sensors cannot detect
because of obstacles