Seat belt warning: Notes

Fig 1: Identifying Seat Belt Warning

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fig 2: Seat Belt Warning Circuit Diagram

Courtesy of SAAB-SCANIA OF AMERICA, INC.

The seat belt warning checks that the driver and front-seat passenger have fastened their seat belts.

The passenger seat has a sensor that detects when the seat is occupied/loaded. Each buckle has a contact connected with TWICE. If the belt is not fastened, TWICE sends a warning, which is indicated in the following way:

belt warning light "FASTEN BELTS"
acoustic signal (SID).

The belt warning light is turned on each time the ignition is turned ON and stays alight until the seat belt is fastened.