I have a 1998 1.8 Toyota Avensis with an electric sunroof (moonroof). Sunroof will slide to fully "open" but will not return to fully "closed" position. Roof will stop at either half way or about 90% closed. Found a stone in channel roughly where the roof stops. Removed stone but roof will only move to that point and no further. Appears that the roof "remembers" where the problem may have been and won't move beyond it? Never had a problem before with sunroof. At a guess I suspect that the roof