Seat Position Sensors

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.