FORD 2012 Expedition v.1 - Manual (Page 265)

WARNING: Objects that are close to either corner of the
bumper or under the bumper, might not be seen on the screen
due to the limited coverage of the camera system.
WARNING: Backup as slow as possible since higher speeds
might limit your reaction time to stop the vehicle.
WARNING: Do not use the camera system with the liftgate
open.
If the back end of the vehicle is hit or damaged, then check with your
authorized dealer to have your rear video system checked for proper
coverage and operation.
Night time and dark area use
At night time or in dark areas, the reverse camera system relies on the
reverse lamp lighting to produce an image. Therefore it is necessary that
both reverse lamps are operating in order to get a clear image in the
dark. If either of the lamps are not operating, stop using the camera
system, at least in the dark, until the lamp(s) are replaced and
functioning.
Servicing
• If the image comes on while the vehicle is not in R (Reverse), have
the system inspected by your authorized dealer.
• If the image is not clear, then check if there is anything covering the
lens such as dirt, mud, ice, snow, etc. If the image is still not clear
after cleaning, have your system inspected by your authorized dealer.
Driving
265
2012 Expedition (exd)
Owners Guide, 1st Printing
USA (fus)