Abstract: Repeatedly performing a process of selecting vehicle data within a second time from time-series data, while shifting a selection range by a third time and causing a portion of the previous selection range and a portion of the current selection range to overlap, and determining a vehicle state indicated by the vehicle data included in each of the selection ranges; and selecting a detection time period of the vehicle data to be classified, selecting all of the selection ranges that include the vehicle data of the selected detection time period, identifying the vehicle state that is most numerous among one or more vehicle states indicated by the vehicle data included in the selected selection ranges, and classifying all of the types of vehicle data detected in the selected detection time period as data of the identified vehicle state.

Abstract: A fault diagnosis device and a fault diagnosis method read a diagnostic trouble code from an Electronic Control Unit to the fault diagnosis device, and display a work guide screen for guiding work in accordance with the read diagnostic trouble code. The work guide screen includes an entire work flowchart consisting of a plurality of work items for identifying a fault occurrence location at which the fault event corresponding to the diagnostic trouble code is caused, and includes an entire work display area in which a work item selected among the plurality of work items is highlighted and a concrete work display area in which concrete work details about the highlighted work item are indicated.

Abstract: A fault diagnosis device and a fault diagnosis method read a diagnostic trouble code from an Electronic Control Unit to the fault diagnosis device, and display a work guide screen for guiding work in accordance with the read diagnostic trouble code. The work guide screen includes an entire work flowchart consisting of a plurality of work items for identifying a fault occurrence location at which the fault event corresponding to the diagnostic trouble code is caused, and includes an entire work display area in which a work item selected among the plurality of work items is highlighted and a concrete work display area in which concrete work details about the highlighted work item are indicated.