344 5-4 . Using the driving support systems
●On an extremely bumpy road , on an incline , on gravel , or on grass .
●When vehicle horns , vehicle detectors , motorcycle engines , air
brakes of large vehicles , the clearance sonar of other vehicles or other devices which produce ultrasonic waves are near the vehicle
●A sensor is coated with a sheet of spray or heavy rain .
●If objects draw too close to the sensor .
●When a pedestrian is wearing clothing that does not reflect ultrasonic waves ( ex . skirts with gathers or frills ).
●When objects that are not perpendicular to the ground , not perpendicular to the vehicle traveling direction , uneven , or waving are in the detection range .
● When strong winds are blowing
●When driving in inclement weather such as fog , snow or a sandstorm
●When an object that cannot be detected is between the vehicle and a detected object
●If an object such as a vehicle , motorcycle , bicycle or pedestrian
cuts in front of the vehicle or runs out from the side of the vehicle
●If the orientation of a sensor has been changed due to a collision or other impact
●When equipment such as a towing eyelet , transport hook , bumper protector , bumper trim , bicycle carrier or snow-removal device ( snow plow ) is installed near the
sensor
●If the front of the vehicle is raised or lowered due to the carried load
●If the vehicle cannot be driven in a stable manner , such as when the vehicle has been in an accident or is malfunctioning
●When tire chains , compact spare tire or an emergency tire puncture repair kit are used
●When towing with the vehicle
■ Situations in which the system may operate even if there is no possibility of a collision
In some situations , such as the following , the system may operate
even though there is no possibility of a collision .
●When driving on a narrow road
●When driving toward a banner , flag , low-hanging branch or boom barrier ( such as those used at railroad crossings , toll gates and
parking lots )
●When there is a rut or hole in the surface of the road
●When driving on a metal cover ( grating ), such as those used for drainage ditches
●When driving up or down a steep slope
●If a sensor is hit by a large amount of water , such as when driving on a flooded road
●There is dirt , snow , water drops or ice on a sensor . ( Cleaning the sensors will resolve this problem .)
●A sensor is coated with a sheet of spray or heavy rain
●When driving in inclement weather