Research on the fault diagnosis technique of automotive integral ABS/ASR/VDC systems based on dual MCU

The fault diagnosis system is essential part of integral ABS/ASR/VDC systems.Based on the research of the fault diagnosis technique of ABS/ASR/VDC,the scheme of the fault diagnosis system is proposed and the hardware circuit and the software flow is designed.The system designed is used in the ECU of the self-developed ABS/ASR/VDC system.The results of real vehicle road test indicate:the fault diagnosis system can detect the fault of the key components in real time.The fault codes are stored and the control of ABS/ASR/VDC exits that insures the safety of vehicle.Otherwise,the design scheme based on the architecture of dual MCU can enhance the fault diagnostic capacity and reliability of ABS/ASR/VDC system,and the failure probability of ECU is greatly reduced.