Subaru 2014 Legacy Owner's Manual page 71

Conventional Cruise Control
If EyeSight is malfunctioning, the EyeSight warning indicator is displayed
on the multi information display and the Pre-Collision Braking System OFF
indicator light and Lane Departure Warning OFF indicator light illuminate. If
this occurs, stop the vehicle in a safe location and then stop the engine
and restart it. If the indicators remain illuminated after restarting the
engine, Conventional Cruise Control cannot be used. This will not interfere
with ordinary driving; however the system should be inspected by a
SUBARU dealer as soon as possible.
When operation of Conventional Cruise Control has been automatically
canceled, perform the set operation again after the condition that caused
the cancellation has been eliminated. If cruise control cannot be set even
after the condition has been corrected, EyeSight may be malfunctioning.
This will not interfere with ordinary driving; however the system should be
inspected by a SUBARU dealer as soon as possible.
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