Activating/Deactivating Front Passenger Airbag

Fig 1: Identifying Activating/Deactivating Front Passenger Airbag

Courtesy of VOLVO CARS CORPORATION

In normal conditions it is the information from the Occupant weight sensor (OWS) (7/93) that is the basis for if the Supplemental restraint system module (SRS) (4/9) shall activate or deactivate the front passenger airbag (8/31 and 8/32). Occupant weight sensor (OWS) communicates continuously with Supplemental restraint system module (SRS) on the local CAN-network. When a passenger is seated, with a weight exceeding a certain level, in the passenger seat the Occupant weight sensor (OWS) will inform the Supplemental restraint system module (SRS) about this. Then the control module's software activates the front passenger airbag, which means that the airbag has full function in case of a collision. At the same time, the Supplemental restraint system module (SRS) sends a signal on the CAN-network, to the central electronic module (CEM) (4/56), with a request that the warning light passenger airbag (PAD) shall be turned off. Then the Central electronic module (CEM) turns off the warning light for passenger airbag (PAD).

If the weight in the passenger seat front is under a certain level, then the Occupant weight sensor (OWS) will inform Supplemental restraint system module (SRS) about this. The control module's software then deactivates airbag passenger front, which means that the airbag remains inactive in case of a collision. At the same time the Supplemental restraint system module (SRS) sends a signal on the CAN-net, to Central electronic module (CEM), with a request to turn on warning light airbag passenger (PAD). Then Central electronic module (CEM) turns on warning light airbag passenger (PAD).