Ford Mariner Owner's Manual page 133

The Belt-Minder feature uses information from the front passenger
sensing system to determine if a front seat passenger is present and
therefore potentially in need of a warning. To avoid activating the
Belt-Minder feature for objects placed in the front passenger seat,
warnings will only be given to large front seat occupants as determined
by the front passenger sensing system.
Both the driver's and passenger's safety belt usages are monitored and
either may activate the Belt-Minder feature. The warnings are the same
for the driver and the front passenger. If the Belt-Minder warnings have
expired (warnings for approximately five minutes) for one occupant
(driver or front passenger), the other occupant can still activate the
Belt-Minder feature.
Note: If you are using MyKey™, the Belt-Minder warning will not
expire. Refer to MyKey™ in the Locks and security chapter.
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 to 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 Mariner (mrn)
Owners Guide, 2nd 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.
133