Vehicle mounted update apparatus, update processing program, and program update method

An update processing program for causing a computer to execute processing for:

• obtaining update information regarding a plurality of updates and an update program that are transmitted from an outer-vehicle external server;
• determining, based on the update information, a transmission order in which update programs respectively corresponding to the plurality of updates are to be transmitted to the vehicle-mounted ECU;
• storing, in a storage unit of the computer, the determined transmission order in association with version numbers of the update programs,
• transmitting the update program corresponding to a single update of the plurality of updates and a self-diagnosis processing program for the vehicle-mounted ECU to perform self-diagnosis processing to the vehicle-mounted ECU, based on the determined transmission order;
• determining success or failure of the single update of the vehicle-mounted ECU based on a result of the self-diagnosis processing performed by the vehicle-mounted ECU according to the self-diagnosis processing program;
• transmitting the update program next in the transmission order to the update program corresponding to the single update to the vehicle-mounted ECU, if the single update is determined as having succeeded;
• and
• interrupting the plurality of updates without transmitting the update program next in order to the vehicle-mounted ECU, if the single update is determined as having failed.

A program update method comprising:

• obtaining update information regarding a plurality of updates and an update program that are transmitted from an outer-vehicle external server;
• determining, based on the update information, a transmission order in which update programs respectively corresponding to the plurality of updates are to be transmitted to the vehicle-mounted ECU;
• transmitting the update program corresponding to a single update of the plurality of updates and a self-diagnosis processing program for the vehicle-mounted ECU to perform self-diagnosis processing to the vehicle-mounted ECU, based on the determined transmission order;
• determining success or failure of the single update of the vehicle-mounted ECU based on a result of the self-diagnosis processing performed by the vehicle-mounted ECU according to the self-diagnosis processing program;
• transmitting the update program next in the transmission order to the update program corresponding to the single update to the vehicle-mounted ECU, if the single update is determined as having succeeded;
• and
• interrupting the plurality of updates without transmitting the update program next in order to the vehicle-mounted ECU, if the single update is determined as having failed.