My dad has a 2004 Toyota Sienna which he takes very good care of. He was picking something up very recently and a meaning-to-be-helpful person went to shut the rear door for him (the tailgate door). This person didn’t realize that it would close itself and he tried to force it. Since this happened when my dad pulls the door to engage the power door function, the door beeps like normal, comes down part way and then reverses and opens back up (as if it has hit something, engaging the safety switch). The only way you can get it to close is to turn off the power to the door and close it manually.
Does anyone know of something he can do to fix it?