Air Bag Systems: Description and Operation

AIR BAG AND SAFETY BELT PRETENSIONER SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

The air bag supplemental restraint system (SRS) is designed to provide increased collision protection for front seat and second row outboard occupants in addition to that provided by the 3-point safety belt system. Safety belt use is necessary to obtain the best occupant protection and to receive the full advantage of the SRS.

This vehicle contains dual-stage deployment (advanced restraint system) driver and front passenger air bag modules. These vehicles are also equipped with driver and front passenger safety belt retractor pretensioners as well as safety canopies. These canopies deploy from the A-pillar to the C-pillar during a side impact or if a rollover condition is detected. Vehicles with safety canopies are also equipped with seat side air bag modules in the front seats. Seat side air bag modules deploy from the outboard front seat backrest during a side impact. A unique restraints control module (RCM) that detects a potential rollover condition is another standard feature.

In addition, there are 2 front impact severity sensors mounted to the hood latch bracket, 2 first row side impact sensors mounted near the base of the B-pillar and 2 second row impact sensors mounted near the base of the C-pillar. A seat position sensor mounted to the driver seat and a usage detection switch is added to the front driver and passenger outboard buckles.

Vehicles are also equipped with an occupant classification sensor (OCS) system mounted to the front passenger seat track assembly. The weight of any occupant or object on the front passenger seat is electronically communicated to the occupant classification system module (OCSM). The RCM uses this information in determining if the passenger air bag module or passenger seat side air bag module is to be deployed in the event of a deployable collision.

The OCS system includes 4 OCS weight sensor bolts, OCSM and a passenger air bag deactivation (PAD) indicator lamp.

Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) Components
This vehicle is equipped with following SRS components:

Part 1:

Part 2: