Apparatus for detecting abnormal execution of program

摘要

An apparatus for detecting abnormality in execution state of a control program. An electronic control unit to which the apparatus for detecting abnormality is applied is provided with a CPU, and a memory for storing a set value representing the number of sub-routines to be executed in each of a series of operations of the control program to be repeatedly executed. The CPU includes a control processor for drive-controlling a door lock motor by executing the control program; a counter for counting the number of the sub-routines that have been executed actually in each of the series of the operations; and a detector which compares the set value stored in the memory with a count value of the counter at the last of the series of the operations, detects that the execution state of the control program is abnormal when the two values are different from each other, and then performs reset of the control processor.