FORD 2010 Expedition v.1 - Manual (Page 309)

While receiving a warning the radio volume will be reduced to a
predetermined level. After the warning goes away, the radio will return
to the previous value.
Audible Warnings
Distance to Object Warning
Speed above 2.5 mph (4 km/h)
up to 1.6 feet (.5 meters) Solid
1.6 feet (.5 meters) to 3.1 feet
(1 meter) Fast beep
3.1 feet (1 meter) to 5.7 feet
(1.8 meters) Medium/fast beep
5.7 feet (1.8 meters) to 9 feet
(2.8 meters) Medium beep
9 feet (2.8 meters) to 13 feet
(4 meters) Medium/slow beep
13 feet (4 meters) to 19.6 feet
(6 meters) Slow beep
Speed below 2.5 mph (4 km/h)
up to 1.4 feet (.4 meters) Solid
1.4 feet (.4 meters) to 3 feet
(.9 meters) Fast beep
3 feet (.9 meters) to 4.5 feet
(1.4 meters) Medium beep
4.5 feet (1.4 meters) to
6.3 feet (1.9 meters) Medium/slow beep
6.3 feet (1.9 meters) to
8.7 feet (2.6 meters) Slow beep
8.7 feet (2.6 meters) to
16.4 feet (5 meters) No sound
The reverse sensing system is automatically enabled when the gearshift
lever is placed in R (Reverse) and the ignition is on. A control in the
message center allows the driver to disable the system, refer to Message
center in the Instrument Cluster chapter for more information.
Note: If the system cannot be turned off, refer to MyKey in the Locks
and Security chapter for more information.
Driving
309
2010 Expedition (exd)
Owners Guide (own2002), 1st Printing
USA (fus)