top will not open or close says its locked, it won't move an inch on 2007 BMW 650i

I have a 2007 BMW 650i convertible the dash has an alert sign saying the top is locked and isn't closed all the way. it won't move at all

by in Saint Johns, FL on January 11, 2011
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3 answers
ANSWER by , January 12, 2011
There is a common problem with the rotation sensor on the tensioning bar, it's submits incorrect signal to the CVM (Convertible Top Module) and the CVM "thinks" the top is closed. Here is the SIB 541706 for this problem: Body - Convertible Top Won't Open/Close Completely SI B54 17 06 Special Roofs November 2006 Technical Service SUBJECT Convertible Top Does Not Completely Open or Close MODEL E64 (6 Series Convertible) SITUATION The customer may complain that either the convertible top will not completely open or close, or the convertible top appears to be completely open/closed, yet the red top operation light continues to flash and the top not locked message appears. Fault code A6A4, for overspeed, will typically be stored in the CVM (Convertible Top Module) when this situation occurs. CAUSE The angle of rotation sensor on the tensioning bar is reading the wrong segment. The sensor position segments are very close together; therefore, if the frame or the sensor itself is slightly out of position, the wrong segment may be read. This condition is exaggerated by temperature-induced expansion, such as when the vehicle sits in direct sun for an extended period of time. CORRECTION The angle of rotation sensor has been updated with improved tolerances for segment recognition. The updated parts have been produced from 8/2005. PROCEDURE In case of a customer complaint, follow the recommendations below. - Attempt to reproduce the customer's complaint. This may require allowing the vehicle to sit in the sun to promote some degree of temperature induced expansion. - Compare the convertible top statuses via the DIS Plus or GT1, to the known correct statuses displayed in the attachment. - If the angle of rotation, tensioning bar, is reading the wrong segment at any position of the convertible top, proceed with procedure A or B. Procedure A - vehicles produced up to 8/2005: - Replace the angle of rotation sensor with the updated part. - Note: The part number did not change, and the updated part can be identified by a date code of August 1, 2005, shown as 1.8.05. - Allow the car to sit in the sun with the top closed and then verify the correct operation of the top. - If the same condition returns, follow procedure B Procedure B - vehicles produced from 8/2005: - The existing sensor will need to be removed from the convertible top frame and modified. Zee
ANSWER by , January 11, 2011
I am not familiar with the 650, I would first check the owner's manual Check here or try this link you may be able to down load a free copy of the owner's manual for your vehicle Then post your question to a BMW specific web site or lastly Autozone have some popular workshop manuals for free on line once you register (for free) on their website or there is a company that independent auto repair shops "buy" their information from that offer a very reasonable service to do it yourselvers. You can get a one week subscription or year subscription very cheap. The information is year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... great quality information same as the professionals have ,much better than generic workshop manuals from parts stores, much cheaper than the factory manual try and get an online repair manual subscription.
ANSWER by , January 12, 2011
If it has less than 50,000 miles it is under the four year/50K warranty and will be free at the dealer. Otherwise, you will need a scan tool with BMW software that can scan the body control module.