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Driver’s seat position sensor, Front safety belt usage sensors, Front safety belt pretensioners – FORD 2007 Expedition v.2 User Manual

Page 178: Front safety belt energy management retractors, Seating and safety restraints

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Driver’s seat position sensor

The driver’s seat position sensor allows your Personal Safety System

௢ to

tailor the deployment level of the driver dual-stage airbag based on seat
position. The system is designed to help protect smaller drivers sitting
close to the driver airbag by providing a lower airbag output level.

Front safety belt usage sensors

The front safety belt usage sensors detect whether or not the driver and
front outboard passenger safety belts are fastened. This information
allows your Personal Safety System

௢ to tailor the airbag deployment and

safety belt pretensioner activation depending upon safety belt usage.
Refer to Safety restraints section in this chapter.

Front safety belt pretensioners

The safety belt pretensioners at the front outboard seating positions are
designed to tighten the safety belts firmly against the occupant’s body
during frontal collisions, and in side collisions and rollovers when the
vehicle is equipped with the Safety Canopy

௢ system. This helps increase

the effectiveness of the safety belts. In frontal collisions, the safety belt
pretensioners can be activated alone or, if the collision is of sufficient
severity, together with the front airbags.

Front safety belt energy management retractors

The front outboard safety belt energy management retractors allow
webbing to be pulled out of the retractor in a gradual and controlled
manner in response to the occupant’s forward momentum. This helps
reduce the risk of force-related injuries to the occupant’s chest by
limiting the load on the occupant. Refer to Safety restraints section in
this chapter.

Determining if the Personal Safety System

ி is operational

The Personal Safety System

௢ uses a warning light in the instrument

cluster or a back-up tone to indicate the condition of the system. Refer
to the Warning lights and chimes section in the Instrument Cluster
chapter. Routine maintenance of the Personal Safety System

௢ is not

required.

The Restraints Control Module (RCM) monitors its own internal circuits
and the circuits for the airbag supplemental restraints, crash sensor(s),
safety belt pretensioners, front safety belt buckle sensors, and the driver
seat position sensor. In addition, the RCM also monitors the restraints
warning light in the instrument cluster. A difficulty with the system is
indicated by one or more of the following:

2007 Expedition (exd)
Owners Guide (post-2002-fmt)
USA
(fus)

Seating and Safety Restraints

178