| 摘要 |
An ECU executes a program including the steps of: when a DC/DC converter is boosting the voltage, calculating a VB estimate value, and if a state, where an absolute value of a difference between the VB estimate value and a VB value sensed by a VB sensor is at least a voltage threshold value X, has been continuing for a predetermined time, determining that the VB sensor is tentatively abnormal; if a state, where an absolute value of a difference between a VH voltage instruct value and a VH value sensed by a VH sensor is at least a voltage threshold value Z, has been continuing for a predetermined time, determining that the VH sensor is tentatively abnormal; and if the sensor is tentatively abnormal, stopping boosting, and specifying the abnormal sensor based on the deviation of the VB value and the VH value.
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