Abnormality diagnosis apparatus

An abnormality diagnosis apparatus for performing an abnormality diagnosis of a system equipped with a rotary electric machine, the abnormality diagnosis apparatus comprising:

• an abnormality detection section that detects an abnormality of the system;
• a fail-safe processing section that, when the abnormality detection section detects an abnormality, performs a fail-safe process for controlling the rotary electric machine on a safe side;
• an abnormality signal generation section that, when the system is in a normal state, generates a false abnormality signal assuming that an abnormality that requires the fail-safe process has occurred;
• an operation check section that performs, on the basis of the false abnormality signal generated by the abnormality signal generation section, an operation check for checking whether the fail-safe process operates normally;
• a first power storage section and a second power storage section that are connected in parallel to the rotary electric machine;
• a first switch that is provided in an electrical path between the first power storage section and the rotary electric machine and electrically connects or disconnects the first power storage section and the rotary electric machine;
• and
• a second switch that is provided in an electrical path between the second power storage section and the rotary electric machine and electrically connects or disconnects the second power storage section and the rotary electric machine, wherein
• while the operation check section is performing an operation check of the fail-safe process, electric power is supplied from the first power storage section to an electrical load that is driven during the operation check, and
• the operation check section performs the operation check while the first power storage section is electrically disconnected from the rotary electric machine by opening the first switch, and the second power storage section is electrically connected to the rotary electric machine by closing the second switch.