Ground, Power & Input/Output Circuits

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Testing information is not available from manufacturer. See WIRING DIAGRAMS article to identify DME/Motronic control unit ground circuits, power circuits and input/output circuits. See Fig 1 . See DME ECU CONTROL UNIT LOCATION table.

Fig 1: DME ECU Connector Terminal Identification

Courtesy of BMW OF NORTH AMERICA, INC.

DME ECU CONTROL UNIT LOCATION

Application	Location
3-Series	Behind Cover On Right Rear Corner Of Firewall
All Others	Inside Box On Right Rear Corner Of Engine Compartment, Behind Strut Tower