ELECTRONIC CONTROL DEVICE, FUNCTION RESTRICTION MANAGEMENT SYSTEM, FUNCTION RESTRICTION MANAGEMENT METHOD, AND STORAGE MEDIUM THEREOF

An electronic control device includes at least one of (i) a circuit and (ii) a processor with a memory storing computer program code executable by the processor. The at least one of the circuit and the processor configured to cause the electronic control device to: activate a function restriction against vehicle theft; set a priority based on an operation type corresponding to an activation operation or a deactivation operation of the function restriction; maintain the set priority; update the maintained priority when a current priority indicated by a function restriction activation request is higher than the maintained priority; determine, based on the priority, whether the activated function restriction can be deactivated; and deactivate the function restriction, which has been activated, in response to determining that the function restriction can be deactivated.