My 2013 Durango Citadel has 3 quick beeps that is different than the chime when it opens and closes. Currently the power open and close is not functioning, just the three quick beeps. I can hear the unit try to open/ shut. It can be opened and shut manually. I checked the fuse and it is in good condition and the battery to the vehicle is in good shape. Any ideas of what may be causing the fault?