Detecting apparatus and electric power steering apparatus

An electric power steering apparatus that is equipped with a detector that has plural sensor sections including plural detecting sections that detecting objects and state quantities to detect are same, and detects at least one of said state quantities in at least two of said sensor sections, comprising:

• a control section to perform a driving-control of a motor based on said state quantities;
• and
• at least one signal line to connect said sensor sections with said control section,
• wherein said plural detecting sections in said sensor sections output said state quantities to said control section through same said signal line,
• wherein said control section comprises:
• a state quantity estimating section to estimate a state quantity at any time from said state quantities and to output said state quantity as an estimated state quantity;
• and
• an abnormality detecting section to detect abnormality of said detector by using an abnormality detection based on said state quantities and said estimated state quantity,
• wherein said control section outputs a selection information that is used in selecting said detecting sections outputting said state quantity through said signal line,
• wherein said detecting sections corresponding to said selection information output said state quantity, and
• wherein said selection information are signals having a predetermined level, said signals having said predetermined level and having a different time length are assigned to each of said detecting sections and selection of said detecting sections outputting said state quantity is performed based on said time length.