Restraints System - Aston Martin DB 9 2010 Manual

Restraints System

The Restraints System provides an improved overall level of frontal
crash protection to the seat occupants and is designed to help further
reduce the risk of airbag-related injuries. The system will analyze
different occupant conditions and crash severity and start the
appropriate safety devices to help better protect a range of occupants
in a variety of frontal crash situations.
A collection of crash sensors provide information to the Restraints
Control Module (RCM). During a crash, the RCM may or may not
operate the safety belt pre tensioners or either none, one, or both
stages of the dual-stage airbag supplemental restraints based on crash
severity and conditions.
The fact that the pre-tensioners or airbags did not operate for both
occupants in a collision does not mean that something is wrong with
the system.
3.10
Rather, it means the system determined the accident conditions
(crash severity, belt usage, etc.) were not appropriate to operate these
safety devices. Frontal airbags are designed to operate only in frontal
and near-frontal collisions, not rollovers, side-impacts, or rear-
impacts unless the collision causes sufficient longitudinal
deceleration.
The system consists of:
• Driver and passengers safety belts with pre-tensioners and load
limiting systems
• Driver and front passenger safety belt usage sensors
• Driver and front passenger dual-stage airbags
• Driver and front passenger side airbags
• Driver and front passenger seat position sensors
• Crash severity sensors
• Restraints Control Module (RCM)
• Restraint system warning symbol
Dual-Stage Airbags
The airbags deploy at either a normal or reduced level of inflation,
depending on crash severity. Various sensors determine the direction
and severity of an impact. The system analyses this information then
deploys the appropriate airbags only.
Seat Position Sensors
Seat position sensors determine the position of the driver and front
passenger seats. The information is used to tailor the airbag
deployment depending upon seat position.
The system is designed to help protect smaller drivers sitting close to
the driver airbag by providing a lower airbag output level.