Ford 2010 Expedition v.1 Manuel d'utilisateur télécharger pdf (Page 205)

the system. Rather, it means the Personal Safety System威 determined

the accident conditions (crash severity, belt usage, etc.) were not

appropriate to activate these safety devices. Front airbags 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.

Driver and passenger dual-stage airbag supplemental restraints

The dual-stage airbags offer the capability to tailor the level of airbag

inflation energy. A lower, less forceful energy level is provided for more

common, moderate-severity impacts. A higher energy level is used for

the most severe impacts. Refer to Airbag supplemental restraints

(SRS) section in this chapter.

Front crash severity sensor

The front crash severity sensor enhances the ability to detect the

severity of an impact. Positioned up front, it provides valuable

information early in the crash event on the severity of the impact. This

allows your Personal Safety System威 to distinguish between different

levels of crash severity and modify the deployment strategy of the

dual-stage airbags and safety belt pretensioners.

Driver’s seat position sensor

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

Seating and Safety Restraints

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Owners Guide (own2002), 1st Printing

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Ford 2010 Expedition v.1 Manuel d'utilisateur Page 205