Lincoln MKZ Owner's Manual page 223

Green: Indicates that the system is available
or ready to provide a warning or intervention,
on the indicated side(s).
Yellow: Indicates that the system is providing
or has just provided a lane keeping aid
intervention.
Troubleshooting
Why is the feature not available (line markings are gray) when I can see the lane markings on the road?
Vehicle speed is outside the operational range of the feature
Sun is shining directly into the camera lens
Quick intentional lane change
Staying too close to the lane marking
Driving at high speeds in curves
The last Alert warning or Aid intervention occurred a short time ago
Ambiguous lane markings (mainly in construction zones)
Rapid transition from light to dark or vice versa
Sudden offset in lane markings
ABS or AdvanceTrac activation
MKZ (CC9) Canada/United States of America, enUSA, Second Printing
Driving Aids
Red: Indicates that the system is providing
or has just provided a lane keeping alert
warning.
The system can be temporarily suppressed
at any time by the following:
220
• Quick braking.
• Fast acceleration.
• Using the turn signal indicator.
• Evasive steering maneuver.