Fault determination method, fault determination device, processor and electronic control unit

The invention provides a fault determination method, a fault determination device, a processor and an electronic control unit, and the method comprises the steps: respectively calculating a voltage value of a target detection point at a collection time point through a plurality of preset calculation formulas, and obtaining a plurality of voltage calculation values; calculating a difference value between each voltage calculation value and the voltage acquisition value to obtain a target difference value, and calculating a ratio of the target difference value to the voltage acquisition value to obtain a plurality of target percentages; and determining a target fault type of the sensor at least according to a plurality of target percentages corresponding to one acquisition period and a preset deviation range, or determining a target fault type of the connector at least according to the voltage calculation values and the voltage acquisition values of the plurality of acquisition periods, the target fault type at