Description & Operation

WARNING: Accidental air bag deployment is possible. Personal injury may result. Read and follow all WARNINGS and AIR BAG SAFETY PRECAUTIONS before working on air bag system or related components.

Supplemental Inflatable Restraint (SIR) system is designed to supplement protection provided by driver-side and passenger-side seat belts. A frontal collision of sufficient force will deploy driver-side and passenger-side dual stage air bag modules and single stage seat belt pretensioners. Steering column and knee bolsters also absorb collision energy.

Single stage head impact air bag modules supplement protection offered by driver-side and passenger-side front doors and vehicle structure. Upon a side collision of sufficient force, Sensing and Diagnostic Module (SDM) deploys head impact air bag modules from driver or passenger front roof rail on side of impact. SDM maintains a 23 Volt Loop Reserve (23 VLR) energy supply to provide deployment energy for up to one minute after loss of ignition voltage.

SIR system consists of Sensing and Diagnostic Module (SDM), driver-side and passenger-side air bag modules, driver-side and passenger-side head impact air bag modules, front seat belt pretensioners, driver-side and passenger-side Side Impact Sensors (SIS), SIR coil assembly and AIR BAG warning light.