FIG. 1 is a perspective view of an electronic control unit showing my design;

FIG. 2 is another perspective view thereof wherein the cover of thereof is in the open position, the inside portion of the cover in broken lines is for illustrative purposes only and forms no part of claimed design;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left side elevational view thereof; and,

FIG. 8 is a right side elevational view thereof.