S60 AWD L5-2.5L Turbo VIN 59 B5254T2 (2005)
Seat belt buckle
The two front seat belt buckles have Hall sensors and are connected to the SRS module. These connections are electrically separated from each other.
The hall sensor detects whether the belt is engaged in the seat belt buckle or not and indicates this to the supplemental restraint system module (SRS).
The information is used to set the activation level for the airbags and seat belt tensioners. If a fault is detected in the seat belt buckles or in their
terminals, an adjustment is made for this, depending on the type of fault.
Activating the collision protection system
The collision safety system is extremely advanced. It is able to adapt the collision protection system to suit the specific circumstances of a collision. In
general it is extremely unlikely that all airbags and seat belt tensioners will be deployed in the same accident. It is possible that only one airbag or seat
belt tensioner is deployed. This is determined by the supplemental restraint system module (SRS) based on the forces that occur during the collision.
If the control module deploys the front airbags, all stages will always be activated. By varying the time between the deployment phases, the inflation of
the airbag is more gentle for a low speed collision.
Activation levels for the collision protection system
The table below shows how the SRS system reacts in the event of a frontal impact.
Level 1= Low speed collision
Level 5 = Severe collision
Activating the side impact protection system
