Seat Belt Reminder
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2014 Volvo XC90, 2013 Volvo XC90, 2012 Volvo XC90, 2011 Volvo XC90, and 2010 Volvo XC90. However, it is still accessible from the selected car via links, so may be relevant.
The seat belt reminder is activated when the upper electronic module (UEM) (4/70) receives a signal from the supplemental restraint system module (SRS) (4/9), via the controller area network (CAN), which indicates that the seat belt is not engaged despite someone sitting in the front seat.