Ford 2010 Explorer Sport Trac Owner's Manual page 143

The Belt-Minder feature uses two different warning chimes. During the
first minute of activation, the warning chime will sound once every
second. The remaining warning chimes will sound twice every second
while the system is activated.
If...
The driver's and front
passenger's safety belts are
buckled before the ignition
switch is turned to the on
position or less than
1-2 minutes have elapsed since
the ignition switch has been
turned on...
The driver's or front
passenger's safety belt is not
buckled when the vehicle has
reached at least 3 mph
(5 km/h) and 1-2 minutes have
elapsed since the ignition
switch has been turned to on...
The driver's or front
passenger's safety belt becomes
unbuckled for approximately
1 minute while the vehicle is
traveling at least 3 mph
(5 km/h) and more than
1-2 minutes have elapsed since
the ignition switch has been
turned to on...
2010 07+ Explorer Sport Trac (esp)
Owners Guide (own2002), 1st Printing
USA (fus)
Seating and Safety Restraints
Then...
The Belt-Minder feature will not
activate.
The Belt-Minder feature is activated
- the safety belt warning light
illuminates and the warning chime
sounds for six seconds every
30 seconds, repeating for
approximately five minutes or until
the safety belts are buckled.
The Belt-Minder feature is activated
- the safety belt warning light
illuminates and the warning chime
sounds for six seconds every
30 seconds, repeating for
approximately five minutes or until
the safety belts are buckled.
143