Mazda 2002 B2300 Owner's Manual page 110

Seating and Safety Restraints
How to use the automatic locking mode
Buckle the combination lap and
shoulder belt.
Grasp the shoulder portion and
pull downward until the entire
belt is extracted.
Allow the belt to retract. As the belt retracts, you will hear a clicking
sound. This indicates the safety belt is now in the automatic locking
mode.
How to disengage the automatic locking mode
Disconnect the combination lap/shoulder belt and allow it to retract
completely to disengage the automatic locking mode and activate the
vehicle sensitive (emergency) locking mode.
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