Data Link Connector
BMW does not supply a wiring diagram specifically for the Diagnostic Connector.The Diagnostic Connector is equipped with circuits from various electrical systems and components, i.e. Computers and Controls, Antilock Brakes, Battery, etc.. Use the information provided at the Data Link Connector View to determine the correct component or system diagram you need to use. Then proceed to appropriately.
Refer to Data Link Connector : Diagrams : Connector Views
Connector Views