To enhance mountability by reducing physique regarding ECU1 for VGRS, and to attain monitoring of an operation result regarding a detection value of an ACT angle even if the operation result is not transmitted/received at the outside of a micro computer 22.

The micro computer 22 is provided with first and second CPUs 27, 28. Thereby, the ECU1 for VGRS can execute operation processing in one micro computer 22 by the first and second CPUs 27, 28 in parallel and can compare the respective operation results. Therefore, by one micro computer 22, it can be monitored whether or not the operation processing can be executed without an error. As a result, the mountability can be enhanced by contracting the physique of the ECU1 for VGRS, and the operation result can be monitored even if the operation result is not transmitted/received at the outside of the micro computer 22.