Patent ID: 7248959
Filing Date: 2007-07-24
Classification: F02D

Abstract:
1. An electronic control apparatus comprising a control circuit which performs processing for controlling a control object, and controlled power supply means responsive to a power-on command status of an externally supplied power supply on/off changeover command for supplying a power supply voltage to operate said control circuit, with said controlled power supply means comprising a power supply holding function whereby said controlled power supply means is responsive to initiation of said power-on command status for beginning to supply said power supply voltage to said control circuit, and is responsive to initiation of a power-off command status of said power supply on/off changeover command for terminating the supplying of said power supply voltage to said control circuit, until completion of the execution of specific processing by said control circuit; wherein said electronic control apparatus comprises measurement means for measuring a duration of a power supply holding interval that extends from a point of changeover from said power-off command status to said power-on command status up to a point of cessation of supplying said power supply voltage to said control circuit, and abnormality detection means for detecting an abnormality of said power supply holding function based upon said measured duration obtained by said measurement means.