2010 Ford Expedition EL Owner Guide 1st Printing (Spanish) - Page 783

Driving 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 Fast beep (1 meter) 3.1 feet (1 meter) to 5.7 feet Medium/fast beep (1.8 meters) 5.7 feet (1.8 meters) to 9 feet Medium beep (2.8 meters) 9 feet (2.8 meters) to 13 feet Medium/slow beep (4 meters) 13 feet (4 meters) to 19.6 feet Slow beep (6 meters) Speed below 2.5 mph (4 km/h) up to 1.4 feet (.4 meters) Solid 1.4 feet (.4 meters) to 3 feet Fast beep (.9 meters) 3 feet (.9 meters) to 4.5 feet Medium beep (1.4 meters) 4.5 feet (1.4 meters) to Medium/slow beep 6.3 feet (1.9 meters) 6.3 feet (1.9 meters) to Slow beep 8.7 feet (2.6 meters) 8.7 feet (2.6 meters) to No sound 16.4 feet (5 meters) 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. 309 2010 Expedition (exd) Owners Guide (own2002), 1st Printing USA (fus)