The occupancy and buckle sensors have detected that the driver unbuckled their seatbelt or left their seat with the tractor parking brake disengaged.
<0.01% (Extremely rare)
Tractor parking brake not applied
Vehicle may free roll
Vehicle may roll away.
The occupancy and buckle sensors have detected that the driver unbuckled their seatbelt or left their seat with the tractor parking brake disengaged.
The driver seat buckle and occupancy sensors detect an unbuckling of the seatbelt, or that the seat is unoccupied and the seat belt is unbuckled, while the tractor air status is not exhausted.
Driver returns to the front driver seat and buckles their seatbelt, or the tractor air status becomes exhausted (tractor parking brake engaged).
Semitruck
customer
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