Seat belt reminder

Fig 1: Identifying Seat Belt Reminder Communication Links & Components

Courtesy of VOLVO CARS OF NORTH AMERICA.

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.