Side Impact

In event of a side-on collision, the side impact sensors (7/108, 7/109, 7/115 and 7/116 for the S40/V50) and (7/115, 7/116, 7/228 and 7/229 for the C30), on the left and right-hand sides evaluate the force of the collision pulse.

If the collision pulse is powerful enough, the level of the acceleration signal from the side impact sensors will exceed the calculated activation level for the collision protection system in the supplemental restraint system module (SRS) (4/9).

The control module must also receive another signal, either from the acceleration sensors in the control module or another side impact sensor.

If the signal from the collision sensor meets the conditions for activation of the side impact airbags (8/51 and 8/52) and/or inflatable curtains (8/66 and 8/67), the control module sends a current pulse to those side impact airbags and/or inflatable curtains that are to be deployed. The side impact protection system will only be deployed on the side where the impact is registered.

The control module also transmits a collision signal on a directly connected cable to the central electronic module (CEM) (4/56) and the phone module (PHM) (16/60), so that these control modules can take certain actions.

A collision status signal is also sent to the phone module (PHM) and the central electronic module (CEM) via the controller area network (CAN).