DUAL STAGE AIR BAGS AND SEAT BELT PRE-TENSIONER




SRS-ECU uses data of the front impact sensor (in engine compartment) and G-sensor (in SRS-ECU) to calculate collision severity during frontal collision. SRS-ECU judges necessity of air bag based on the calculated collision severity. In addition, the SRS-ECU also judges the operation of seat belt pre-tensioner after calculating collision severity. Alternatively, when the passenger’s air bag cut off switch is set to the air bag off position, the SRS-ECU illuminates the passenger’s air bag OFF indicator lamp by disabling the deployment of passenger’s (front) air bag.