Sensor system, and sensor system failure detecting method

A sensor system comprising:

• a current DA converter configured to output a control current toward a sensor element;
• a control unit configured to generate a control current instruction value corresponding to magnitude of the control current and input the control current instruction value to the current DA converter;
• an instruction value sequence generating unit configured to generate, instead of the control current instruction value generated by the control unit, an inspection instruction value sequence in which predetermined inspection current instruction values inputted to the current DA converter are arranged in order and by which failure of the current DA converter can be detected;
• an inspection current detection unit configured to detect an inspection current value of an inspection current that is outputted from the current DA converter sequentially inputting the inspection current instruction value forming the inspection instruction value sequence;
• and
• a failure detection unit configured to detect the failure of the current DA converter from an inspection current value sequence in which the inspection current values detected by the inspection current detection unit are arranged in order of detection.