Vehicle-Sensitive (Emergency) Locking Mode
WARNING: This page is about a different car, the 2003 Ford RV Cutaway, 2003 Ford Econoline, 2003 Ford E550 Super Duty, 2003 Ford E450 Super Duty, and 2003 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The rear seat belts cannot be made to lock up by pulling quickly on the belt
The vehicle-sensitive locking mode is the normal retractor mode, allowing free shoulder belt length adjustments to occupant movements and locking in response to vehicle movements. If the driver brakes suddenly, turns a corner sharply or the vehicle receives an impact of approximately 8 km/h (5 mph), the combination safety belts will lock to restrain forward movement of the driver and passengers.
The front seat belt system can also be made to lock manually by quickly pulling on the shoulder belt.