Patent ID: 11928459
Assignee: DENSO CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC G  B  H | IPC B  G  H

Claim 14:
15. A retry point specifying method for an electronic control unit that is configured to receive update data from outside and rewrite a program by writing the received update data into a non-volatile memory, the method comprising the steps of:
setting a process flag indicative of a progress of a first process that is one of a series of processes related to a program rewrite and a progress of a second process that is another of the series of processes related to the program rewrite in response to performing the first process and then performing the second process after performing the first process and setting the process flag to a certain block of the non-volatile memory in the electronic control unit;
specifying a retry point for resuming the program rewrite based on the process flag when the processes related to the program rewrite are suspended;
storing an amount of the update data that has been written until the program rewrite is suspended; and
requesting the vehicle master device to transfer the update data based on the stored amount of the update data when resuming the program rewrite.