Air Bag And Safety Belt PRETENSIONER Supplemental Restraint System (SRS) - Overview (G1520748): Overview

WARNING: All pyrotechnic devices are dangerous. Before performing any procedures on any pyrotechnic device, read all information contained within the standard workshop practices, refer to Standard Workshop Practices .

Refer to: Supplemental Restraint System (SRS) Health and Safety Precautions .

The Supplemental Restraint System (SRS) provides additional protection for the vehicle occupants in certain impact conditions. The system is controlled by the Restraints Control Module (RCM), which is mounted beneath the floor console. The system includes twin stage drivers and front passenger airbags.

The RCM receives inputs from various sensors around the vehicle and determines which, if any, airbags should be deployed.

The SRS features an occupant detection system. The occupant detection system comprises a mat fitted inside the front passenger seat. By monitoring the condition of the mat, the RCM can determine if the front passenger seat is occupied. It uses this information to determine which airbags to deploy in the event of an impact. This information is also used to illuminate the safety belt Instrument Cluster (IC) warning lamp if the front passenger seat is occupied and the safety belt is not engaged.

North American Specification (NAS) vehicles also feature an occupant classification system. The occupant classification system comprises a control module, pressure pad and safety belt tension sensor. The system can determine the size and weight of the front seat passenger. This information is transmitted to the RCM over the high speed Controller Area Network (CAN) bus. The RCM uses this information to help determine which airbags to deploy in the event of an impact.