Subaru Forester 2018 Manual page 100

Troubleshooting
A vehicle (in front of your vehicle) is not detected, detection is delayed or detec-
tion is lost quickly.
Is the vehicle in front stopped, moving slowly relative to your vehicle or moving
extremely slowly?
Detection of stopped vehicles, vehicle moving slowly relative to your vehicle, and
vehicles moving extremely slowly may be difficult.
Is the windshield dirty or fogged?
If the windshield is dirty or fogged, it may not be possible to detect object or vehi-
cles. Clean off the dirt or fog from the windshield, and then try using the system
again.
Is the vehicle in front far away?
The maximum detection distance of EyeSight's stereo camera is approximately
360 ft (110 m). Detection is not possible if the vehicle is farther away.
Is the vehicle on a curve?
The detection range is limited in the horizontal directions when the camera is
properly aimed.
Is the vehicle on a road with repeated uphill and downhill grades (such as an over-
pass), or on a banked road?
The detection range is limited in the vertical directions.
Did the vehicle detected in front change?
Detection may be delayed after the vehicle in front has changed.
Have water, snow or other substances been kicked up by the vehicle in front as it
drives?
When water or snow have been kicked up, it may not be possible to detect the
vehicle in front.
Control is activated even though there is no vehicle in front detected.
Is there a vehicle in the neighboring lane?
Depending on the road conditions, vehicles in neighboring lanes may be detected
as well as a vehicle directly in front.
Are you driving on or near a curve?
When driving on a curve, braking control may be activated in response to guard
rails, the angle of the steering wheel, or roadside structures.
The Lead Vehicle Start Alert activates, even though there is no vehicle in front.
Depending on surrounding objects, traffic environment and weather, the Lead
Vehicle Start Alert may issue a warning in response to objects other than a vehicle
that appear in front of your vehicle.
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