Importance

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Abstract

An MPU, which serves as an anomaly detecting device, carries out a drive circuit operating state determination. If the drive circuit is in a non-driving state, the MPU stores in a storage area a board temperature detected value, which is detected at each predetermined calculation cycle, as a board temperature reference value. If the drive circuit is in a driving state, the MPU reads out the reference value stored in the storage area and calculates a difference between the reference value and the detected value detected at each predetermined calculation cycle. Then, if the absolute value of the difference is less than or equal to a predetermined threshold value, the MPU determines that a stuck anomaly of the output signal from the temperature sensor has occurred.

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First Claim