Restraint Devices
The frontal Supplemental
Inflatable Restraint (SIR) system supplements the protection offered by the
driver and front passenger seat belts. The frontal SIR system deploys an air
bag (1) from the center of the steering wheel and from the right side
of the instrument panel (1). The seat belt pretensioners (2)
remove slack from the driver and passenger front seat belts during a frontal
impact. The frontal SIR system deploys the seat belt pretensioners with the
frontal air bags. The knee bolsters (3) absorb crash energy. The driver
and passenger knee bolsters are below the instrument panel. The steering column
is collapsible. After an AIR BAG deployment, the SDM will send out a post-air
bag deployment message to the Rear Integration Module (RIM). The RIM will
unlock the doors and turn ON the interior lights 15 seconds after receipt
of this message.
Frontal Inflatable Restraint Devices
A frontal crash of sufficient
force up to 30 degrees off the longitudinal centerline of the vehicle
will deploy the frontal air bags.
Frontal SIR System Description
The frontal SIR system consists of the following components:
• | An inflatable restraint sensing and diagnostic module (SDM). |
• | An inflatable restraint steering wheel module (steering wheel
air bag). |
• | An Inflatable restraint steering wheel module coil. |
• | An inflatable restraint IP Module (IP air bag). |
• | An driver seat belt pretensioner |
• | An passenger seat belt pretensioner |
• | An AIR BAG Warning Lamp in the instrument panel cluster (IPC). |
The inflatable restraint sensing and diagnostic module (SDM), inflatable
restraint steering wheel module coil, inflatable restraint steering wheel
module, inflatable restraint IP module, driver seat belt pretensioner, passenger
seat belt pretensioner, and the connecting wires make up the frontal deployment
loops. The function of the frontal deployment loops is to supply current
through the frontal inflator modules, deploying the frontal inflator modules
simultaneously. Deployment occurs when the SDM detects vehicle velocity changes
severe enough to warrant deployment.
The SDM contains a sensing device (accelerometer) that converts vehicle
velocity changes to an electrical signal. The SDM compares this electrical
signal to a value stored in memory. When the generated signal exceeds the
stored value, the SDM performs additional signal processing and compares the
generates signals to values stored in memory. When two of the generated signals
exceed the stored values, the SDM will cause current to flow through the frontal
inflator modules deploying the frontal inflator modules.
Side Impact Inflatable Restraint Devices
The side impact inflatable
restraint system supplements the protection offered by the driver or passenger
door (2), and the vehicle structure along with the protection offered
by the driver and passenger seat belts. The side impact air bag system deploys
an air bag (1) from the side of the driver or front passenger seat.
A side crash of sufficient force will deploy a side air bag.
Side Impact Air Bag System Description
The side impact air bag system consists of the following components:
• | Two inflatable restraint side impact sensors (SIS) (one in each
lower center pillar). |
• | Two inflatable restraint side impact inflator modules (one side
air bag in each front seat). |
• | An inflatable restraint sensing and diagnostic module (SDM). |
• | An AIR BAG Warning Lamp in the instrument panel cluster (IPC). |
The inflatable restraint side impact sensor (SIS), inflatable restraint
side impact inflator modules (Side Air Bags), inflatable restraint sensing
and diagnostic module (SDM), and the connecting wires make up the side impact
inflatable restraint system. The SDM contains a sensing device (accelerometer)
that converts vehicle velocity changes to an electrical signal. The SIS is
treated as a discriminating sensor and is a input to the SDM. If the SIS determines
that the side air bags should be deployed, the SIS tells the SDM to deploy
the side air bags. The SDM will then check to see if there is enough vehicle
acceleration to warrant a deployment. If so, the SDM will send current to
the side air bag. Deployment occurs when the SDM receive vehicle velocity
changes through the SIS that are severe enough to warrant deployment.
Rear Side Impact Air Bag System Devices if equipped with (option AW9)
The rear side impact inflatable restraint system
supplements the protection offered by the driver or passenger door, and the
vehicle structure along with the protection offered by the driver and passenger
seat belts. The rear side impact air bag system deploys an air bag (1)
from behind the driver or passenger seat. A side crash of sufficient force
will deploy a side air bag.
Rear Side Impact Air Bag System Description if equipped with (option
AW9)
The rear side impact air bag system is made up of some components that
are use in the side impact air bag system. The rear side impact air bag system
consists of the following components:
• | Two inflatable restraint side impact sensors (SIS) (one in each
lower center pillar). |
• | Two inflatable restraint rear side impact inflator modules (one
rear side air bag in back of rear seat). |
• | An inflatable restraint sensing and diagnostic module (SDM). |
• | An AIR BAG Warning Lamp in the instrument panel cluster (IPC). |
The inflatable restraint side impact sensor (SIS), inflatable restraint
rear side impact inflator modules (Rear Side Air Bags), inflatable restraint
sensing and diagnostic module (SDM), and the connecting wires make up the
rear side impact inflatable restraint system. The SDM contains a sensing device
(accelerometer) that converts vehicle velocity changes to an electrical signal.
The SIS is treated as a discriminating sensor and is a input to the SDM. If
the SIS determines that the side air bags should be deployed, the SIS tells
the SDM to deploy the front and rear side air bags. The SDM will then check
to see if there is enough vehicle acceleration to warrant a deployment. If
so, the SDM will send current to the front and rear side air bags. Deployment
occurs when the SDM receive vehicle velocity changes through the SIS that
are severe enough to warrant deployment.