Airbag Supplementary Restraint System (G2298637): Overview
For additional information, Refer to: STANDARD WORKSHOP PRACTICES .
The Supplementary Restraint System (SRS) provides additional protection for vehicle occupants in certain impact conditions by selective activation of the following airbags:
- Driver and passenger airbags.
- Side airbags.
- Lower airbags.
- Side air curtains.
- Seatbelt pretensioners.
Operation of the system is controlled by a Restraints Control Module (RCM).
The RCM receives inputs from various sensors around the vehicle to determine which devices, if any, should be activated during an impact.
The inputs are the following:
- An Occupant Classification Sensor System (OCSCM) - North American Specification (NAS) market vehicles only
- Front and side impact sensors.
- Side impact pressure sensors.
- Pedestrian impact sensor.
- X, Y and Z axis acceleration sensors.
- Vehicle speed.
- Front seatbelt tension sensor.
- Seat track position sensor.
On all vehicles except NAS, Australia and Japan market, the passenger airbag can be enabled and disabled using the vehicle setup menu in the Instrument Cluster (IC) message center.
For additional information, Refer to: INFORMATION AND MESSAGE CENTER .
The activation status of the passenger airbag is given by an indicator in the front overhead console. The status of the SRS is given by an airbag warning indicator in the IC.
The airbags and air curtains feature hybrid inflators, which use a self-contained pyrotechnic device to heat a cylinder of compressed inert gas within the inflator. Above a calibrated pressure, the cylinder bursts and releases the gas into the airbag. The benefits of hybrid inflators are a cooler inflation gas, resulting in lower airbag surface temperatures, and elimination of the post-deployment effluent associated with solid pyrotechnic inflators.