A rotation drive control apparatus includes a first mode for counting a detection value of a second detecting member to control a shift amount of a rotation member, based on a detection value of a first detecting member obtained in controlling and rotating a motor, and a second mode for extracting at least one abnormal portion among the motor, control section, mechanism section, and detecting section, based on detection patterns of combinations of a state in which the first detecting member detects a rotation reference position within a predetermined time, or a state in which the first detecting member does not detect the rotation reference position within the predetermined time, and a state in which the second detecting member detects a rotation shift position within a predetermined time, or a state in which the second detecting member does not detect the rotation shift position within the predetermined time.