Coded Ground Signals

Coded ground signals produce a set of High/Low requests, the combination (pattern) of which is interpreted by the control module to perform a specific function. Coded ground signals are generated through a switch or series of switches signaling the control module requests for operation.

Fig 1: Identifying E 36 Wiper Circuit

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Identifying E 39 Wiper Circuit

Courtesy of BMW OF NORTH AMERICA, INC.