Side Impact Sensor

SIDE IMPACT SENSOR (SIS)




The release system for the side airbag consists of a SRSCM installed in the middle of the vehicle and two side impact sensor (SIS) - one on the left hand and one on the right. Only the SRSCM is capable of releasing the airbag system in the vehicle. In the dialog between the SRSCM and the side impact sensor it is the SRSCM which takes the release decision. The SRSCM is supported in connection with the side airbag function by the two side impact sensor, which act as intelligent acceleration sensors and as such back up the central airbag controller. Both the side impact sensors continuously report the current system status on the left and right-hand sides of the vehicle to the SRSCM.
If one of the two side impact sensor reports an acceleration level, the SRSCM must verify the acceleration signal internally by means of a suitable plausibility check. The SRSCM does not release the appropriate side airbag unless the result of this verification is positive.