1.School of Mechanical & Vehicle Engineering，Shanghai University of Engineering Science，Shanghai 201620，China； 2.Weifang Litro Electrical Technology Co．，Ltd．，Weifang 261000，China
Abstract： An ECU of a gas engine is used as a test object, and an ECU offline(EOL) test system is developed based on the STM32F103 series main control chip. It consists of a host computer, a test board layer, and a test ECU. It can implement switching detection, analog detection, and frequency detection and etc. The host computer transmits data instructions, and the test board layer performs, which can complete the detection of ECU hardware and functions. The application shows that the EOL system has the advantages of short time consumption, high efficiency and stable work.
Key words : ECU；offline detection；test board layer
