Position sensor and position detection method

A position detection method executed by a position sensor including a magnetic sensor, the magnetic sensor detecting a magnetic flux generated by a magnet moving together with a moving body, and another magnetic sensor configured to detect a magnetic flux generated by the magnet, the other magnetic sensor being different from the magnetic sensor,

• wherein:
• the magnetic sensor is set so as to detect a first detection value taking a value on a locus preset in accordance with a position of the moving body, and the locus is set so that a change rate of the first detection value corresponding to change of the position of the moving body differs for each of a plurality of sections set within a movement range of the moving body;
• the other magnetic sensor is set so as to detect a second detection value taking a value on a second locus preset in accordance with the position of the moving body, and the second locus is set so as to have a preset relation with the locus for each of the sections;
• and
• the second locus is set so that a change rate of the second detection value is substantially identical to the change rate of the first detection value for each of the sections,
• the position detection method comprising detecting an anomaly of the magnetic sensor based on a relation between the first detection value and the second detection value.