Seat belt reminder
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Volvo V70, 2006 Volvo V70, 2005 Volvo V70, 2004 Volvo V70, and 2003 Volvo V70. 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 (4/70) receives a signal from the central electronic module (4/56), via the Control area network (CAN), which indicates that the seat belt is not engaged despite someone sitting in the front seat. Data is also transmitted to the driver information module (5/1) which indicates to the driver that the seat belt is not being used in one of the front seats.