When driving below 5 mphâforward or reverseâwith the rear passenger door fully open, the only alert is a small âdoor ajarâ icon on the dash. This icon is the same drawing, whether the door is completely open or semi-latched, so the driver has no way to know the extent of the hazard. Without an additional warning, an fully open door can strike pedestrians, poles, garage, or other vehicles, and any passenger seated beside it is needlessly exposed to injury.