Abnormality monitoring device for a vehicle control system

摘要

A data field of a data frame which is sent from a HEV_ECU to a motor A controller and a motor B controller includes control data of 5 bytes and a number-of-sending-times counter of one byte, which is located following the control data. The contents of the number-of-sending-times counter is incremented (decremented) every time data is sent to the motor A controller and the motor B controller. A T/M_ECU constantly monitors the contents of the number-of-sending-times counter. When a count value of the number-of-sending-times counter is not normally incremented (decremented) consecutively two times, the T/M_ECU decides that the HEV_ECU is abnormal, and informs other ECUs that the HEV_ECU is abnormal.