FORD 2003 Explorer v.3 - Manual (Page 110)

All safety restraints in the vehicle are combination lap and shoulder
belts. All of the passenger combination lap and shoulder belts have two
types of locking modes described below:
Vehicle sensitive mode
This is the normal retractor mode, which allows free shoulder belt length
adjustment to your movements and locking in response to vehicle
movement. For example, if the driver brakes suddenly or turns a corner
sharply, or the vehicle receives an impact of approximately 8 km/h (5
mph) or more, the combination safety belts will lock to help reduce
forward movement of the driver and passengers.
Automatic locking mode
The automatic locking mode is not available on the driver safety belt.
When to use the automatic locking mode
In this mode, the shoulder belt is automatically pre-locked. The belt will
still retract to remove any slack in the shoulder belt. The automatic
locking mode is not available on the driver safety belt.
This mode should be used any time a child safety seat is installed in a
passenger front or outboard rear seating position (if equipped). Children
12 years old and under should be properly restrained in the rear seat
whenever possible. Refer to Safety restraints for children or Safety
seats for children later in this chapter.
How to use the automatic locking mode
• Buckle the combination lap and
shoulder belt.
Seating and Safety Restraints
110