Jumper Harness and Communication

There is a jumper harness between C921 and both roof opening panel assembly motors (sunshade and sunroof motors) which includes a communication circuit that is used only for communication between the motors. If the communication circuit between the sunroof motor and sunshade motor is open or shorted the sunroof motor will only fully close the sunroof one time, then not operate. Also, if the communication circuit is open or shorted the sunshade motor will open fully, then only operate between fully open and the front of the fixed glass panel.