S60 AWD L5-2.5L Turbo VIN 59 B5254T2 (2005)
Front impact sensor (certain markets and models only)
The frontal impact sensors are used to provide the supplemental restraint system module (SRS) with advance information about the collision pulse. This
enables the control module to determine more accurately the components to be activated.
The frontal impact sensors have integrated logic which transmits acceleration data to the supplemental restraint system module (SRS).
The front impact sensors transmit continuous signals to the control module to indicate that they are working. In the event of a fault in a frontal impact
sensor, a fault signal is transmitted to the control module which then stores a diagnostic trouble code (DTC). A diagnostic trouble code (DTC) is also
stored if the communication between the control module and one of the frontal impact sensors does not function. Each frontal impact sensor has a
software ID. The ID is used to check that the correct frontal impact sensor is installed.
Data is transmitted on the same cable used for power supply.
The two frontal impact sensors are inside the left and right-hand headlamps.
Seat position sensors (XC90 USA/CDN only)
The seat position sensor is used to determine the size of the person sitting on the seat. There are two seat position sensors in the car. One is under the
driver's seat and the other under the front passenger seat. The seat position sensors are connected directly to the central electronic module (CEM).
The seat position sensor consists of a Hall sensor which alters the current depending on the position of the seat. The seat position sensor has two
classifications, these are a small person and a large person.
A small person means that the seat is approximately 10 cm from the first seat position and forwards. Other positions are classified as a large person.
This information is sent onwards on the controller area network (CAN) to the supplemental restraint system (SRS) module. The supplemental restraint
system module (SRS) uses this information to optimize the function of the front driver and passenger airbags in the event of a collision.
Adaptive steering column (XC90 USA/CDN only)
