The ornamental design for an enginemonitoringunit, as shown and described.
FIG. 1 is a front elevation view of an engine monitoring unit;
FIG. 2 is a rear elevation view of the engine monitoring unit of FIG. 1;
FIG. 3 is a top plan view of the engine monitoring unit of FIG. 1;
FIG. 4 is a bottom plan view of the engine monitoring unit of FIG. 1;
FIG. 5 is a left side elevation view of the engine monitoring unit of FIG. 1;
FIG. 6 is a right side elevation view of the engine monitoring unit of FIG. 1; and,
FIG. 7 is a perspective view of the engine monitoring unit of FIG. 1.
The broken line showing of *structural matter** is included for the purpose of illustrating non-claimed subject matter and forms no part of the claimed design.