Defect appearance detecting unit for electrical angle i.e. rotational angle, detection device, has return state evaluation section evaluating that detection device is return back from defect state to normal state based on angle and value

摘要

The unit has a return state evaluation section (537) determining whether an electrical angle i.e. rotational angle, is modified on all its range and evaluating that a rotational angle detection device is return back from a temporary defect state to a normal state, based on the angle and a defect evaluation value. A determined defect evaluation section (538) evaluates that the device is found in a determined defect state, based on continuation of the evaluation during a time interval that is longer than a preset time interval, and determines a defect appearance in the device.