Ford Fiesta Owner's Manual page 118

Note: If your vehicle sustains damage to
the bumper or fascia, leaving it misaligned
or bent, the sensing zone may be altered
causing inaccurate measurement of
obstacles or false alarms.
The system warns you of obstacles within
a certain range of the bumper area.
When receiving a detection warning, the
radio volume is reduced to a
predetermined level. After the warning
goes away, the radio volume returns to the
previous level.
Rear Sensing System
The rear sensors are only active when you
move the transmission selector lever to
position R (reverse). As your vehicle moves
closer to the obstacle, the rate of the
audible warning increases. When the
obstacle is fewer than 12 inches (30
centimetres) away, the audible warning
sounds continuously. If a stationary or
receding object is detected farther than 12
inches (30 centimetres) from the side of
your vehicle, the audible warning sounds
for only three seconds. Once the system
detects an object approaching, the audible
warning sounds again.
A Coverage area of up to 72 inches
(183 centimetres) from the rear
bumper (with a decreased
coverage area at the outer
corners of the bumper).
Parking Aids
The system detects certain objects when
you move the transmission selector lever
to position R (reverse):
• and your vehicle is moving toward a
stationary object at a speed of 3 mph
(5 km/h) or less
• but your vehicle is not moving, and a
moving object is approaching the rear
of your vehicle at a speed of 3 mph (5
km/h) or less
• and your vehicle is moving at a speed
of less than 3 mph (5 km/h) and a
moving object is approaching the rear
of your vehicle at a speed of less than
3 mph (5 km/h).
Move the transmission selector lever from
position R (reverse) to turn the system off.
If a fault is present in the system, a warning
message appears in the information
display and does not allow you to switch
the system on.
Front and Rear Sensing System
The system turns on automatically
whenever you switch the ignition on. It
becomes active when you press the
parking aid button or move the
transmission selector lever into position R
or reverse gear and your vehicle speed is
below 7 mph (12 km/h).
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