On-board component abnormal site identifying method, on-board component abnormal site identifying system, on-board component abnormal site identifying apparatus, on-board component abnormal site report control apparatus, and vehicle control apparatus

An on-board component abnormal site identifying method comprising:

• executing, by an execution device, an acquisition process for acquiring values of input variables in a state in which mapping data for defining mapping is stored in a storage device, the mapping including, as the input variables, a foreign substance variable related to a foreign substance in oil flowing through an on-board component when an abnormality occurs in the on-board component, and including, as an output variable, an abnormal site variable indicating an abnormal site of the on-board component;
• executing, by the execution device, a calculation process for calculating a value of the abnormal site variable by inputting, to the mapping, the values of the input variables that are acquired through the acquisition process;
• and
• executing, by the execution device, a reporting process for reporting a calculation result of the calculation process by operating a reporting device.