Ford 2013 Explorer Owner's Manual page 259

Gray: Indicates that the system is temporarily unable to provide a
warning or intervention on the indicated side(s). This may be because:
• the vehicle is under the activation speed
• the turn indicator is active
• the vehicle is in a dynamic maneuver
• the road has no or poor lane markings in the camera field-of-view
• the camera is obscured or unable to detect the lane markings due to
environmental conditions (e.g. significant sun angles or shadows,
snow, heavy rain, fog), traffic conditions (e.g. following a large vehicle
that is blocking or shadowing the lane), or vehicle conditions (e.g.
poor headlamp illumination).
See Troubleshooting for additional information.
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.
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:
• Pressing the button
• Quick braking
• Fast acceleration
• Using the turn signal indicator
• Evasive steering maneuver
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
Previous feature activation happened within the last one second
2013 Explorer (exp)
Owners Guide gf, 2nd Printing
USA (fus)
Driving Aids 259