Lincoln 2015 MKZ Owner's Manual page 228

The surface of the radar in the grille is dirty or obstructed in some
The surface of the radar in the grille is clean but the message remains
in the display
Heavy rain, spray, snow, or fog is interfering with the radar signals
Swirling water, or snow or ice on the surface of the road may interfere
with the radar signals
System Limitations
WARNING
The collision warning system's brake
support can only help reduce the
speed at which a collision occurs if the driver
applies the vehicle's brakes. The brake pedal
must be pressed just like any typical braking
situation.
MKZ (), enUSA
Driving Aids
Cause
way
Due to the nature of radar technology, there
may be certain instances where vehicles do
not provide a collision warning. These
include:
• Stationary vehicles or vehicles moving
below 6 mph (10 km/h).
• Pedestrians or objects in the roadway.
• Oncoming vehicles in the same lane.
• Severe weather conditions (see blocked
sensor section).
I n f o r ma t i o n P r o v i d e d b y :
Clean the grille surface in front of the radar or remove the object
causing the obstruction
Wait a short time. It may take several minutes for the radar to detect
that it is no longer obstructed
The collision warning system is temporarily disabled. Collision warning
should automatically reactivate a short time after the weather condi-
The collision warning system is temporarily disabled. Collision warning
should automatically reactivate a short time after the weather condi-
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Action
tions improve
tions improve
Debris build-up on the grille near the
headlamps (see blocked sensor section).
Small distance to vehicle ahead.
Steering wheel and pedal movements
are large (very active driving style).