Provided is an insulation resistance measuring apparatus capable of highly precisely measuring an insulation resistance characteristic of a capacitive electronic part in a short period of time while being unaffected by various kinds of noises such as from a power supply, measured power supply and the measured capacitor. A printer driver generates print data such as a PDL interpretable by a printer on the basis of command data transferred from a GDI. The torque control module selectively limits torque output by an engine to the torque limit.