The anti collision avoidance systems did not engage. Instead it seemed the vehicle sped up. It did not engage to stop a collision, I was at almost a stop. Vehicle seemed to speed up. Anti-collision systems did not engage at all. This system worked previously. It did not brake automatically nor avoid a collision. It caused an accident & there were minor injuries & totaling 2 vehicles mine (2014 Jeep Grand Cherokee Overland) & the other party to accidents truck.