Mazda 2002 B2300 Owner's Manual page 114

Seating and Safety Restraints
WARNING: The lap belts should fit snugly and as low as possible
around the hips, not around the waist. Failure to position the lap
belt correctly may cause serious injury in an accident.
If you need to lengthen the belt, unfasten it and repeat the procedure
above.
To unfasten the belt, push in the release button prior to opening the rear
door.
Safety belt extension assembly
If the safety belt assembly is too short for you, even when fully
extended, 20 cm (8 inches) can be added to the safety belt assembly by
adding a safety belt extension assembly. Safety belt extension assemblies
can be obtained from your authorized Mazda dealership.
Use only extensions manufactured by the same supplier as the safety
belt. Manufacturer identification is located at the end of the webbing on
the label. Also, use the safety belt extension only if the safety belt is too
short for you when fully extended.
NOTE:Do not use extensions to change the fit of the shoulder belt
across the torso.
Safety belt warning light and indicator chime
The seat belt warning light illuminates in the instrument cluster and a
chime sounds to remind the occupants to fasten their safety belts.
Conditions of operation
If...
The driver's safety belt is not
buckled before the ignition switch
is turned to the ON position...
The driver's safety belt is buckled
while the indicator light is
illuminated and the warning chime
is sounding...
The driver's safety belt is buckled
before the ignition switch is turned
to the ON position...
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Then...
The safety belt warning light
illuminates 1-2 minutes and the
warning chime sounds 4-8
seconds.
The safety belt warning light and
warning chime turn off.
The safety belt warning light and
indicator chime remain off.