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Seating and safety restraints – FORD 2003 Expedition v.3 User Manual

Page 170

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SAFETY RESTRAINTS

Personal Safety System

The Personal Safety System provides an improved overall level of frontal
crash protection to front seat occupants and is designed to help further
reduce the risk of air bag-related injuries. The system is able to analyze
different occupant conditions and crash severity before activating the
appropriate safety devices to help better protect a range of occupants in
a variety of frontal crash situations.

Your vehicle’s Personal Safety System consists of:
• Driver and passenger dual-stage air bag supplemental restraints.
• Front safety belts with pretensioners, energy management retractors,

and safety belt usage sensors.

• Driver’s seat position sensor.
• Front crash severity sensor.
• Restraints Control Module (RCM).
• Restraint system warning light and back-up tone.
• The electrical wiring for the air bags, crash sensor(s), safety belt

pretensioners, front safety belt usage sensors, driver seat position
sensor, and indicator lights.

How does the personal safety system work?

The Personal Safety System can adapt the deployment strategy of your
vehicle’s safety devices according to crash severity and occupant
conditions. A collection of crash and occupant sensors provides
information to the Restraints Control Module (RCM). During a crash, the
RCM activates the safety belt pretensioners and/or either one or both
stages of the dual-stage air bag supplemental restraints based on crash
severity and occupant conditions.

The fact that the pretensioners or air bags did not activate for both front
seat occupants in a collision does not mean that something is wrong with
the system. Rather, it means the Personal Safety System determined the
accident conditions (crash severity, belt usage, etc.) were not
appropriate to activate these safety devices. Front air bags are designed
to activate only in frontal and near-frontal collisions, not rollovers,
side-impacts, or rear-impacts unless the collision causes sufficient
longitudinal deceleration.

Seating and Safety Restraints

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