Diagnostic method, non-transitory computer readable medium, and diagnostic apparatus

A diagnostic method for diagnosing a state of a cable including a diagnosis target portion and a portion other than the diagnosis target portion,

• the diagnosis target portion corresponding to a part of a measurement target portion for measuring a temperature of the cable,
• the portion other than the diagnosis target portion corresponding to a different measurement target portion than the measurement target portion corresponding to the diagnosis target portion,
• the diagnostic method comprising:
• acquiring a measured temperature value at the measurement target portion corresponding to the diagnosis target portion of the cable as a temperature of the diagnosis target portion of the cable;
• acquiring a measured temperature value at the measurement target portion corresponding to the portion other than the diagnosis target portion of the cable as a temperature of the portion other than the diagnosis target portion of the cable;
• and
• determining that a state of the diagnosis target portion is abnormal in a case in which an amount of change in the temperature of each of the diagnosis target portion and the portion other than the diagnosis target portion of the cable satisfies a diagnostic condition applied to diagnosis based on a change over time in the temperature of each of the diagnosis target portion and the portion other than the diagnosis target portion of the cable, and the temperature of the diagnosis target portion of the cable satisfies a diagnostic condition applied to diagnosis based on the temperature of the diagnosis target portion of the cable.