The structure,working principle and fault diagnostic methods of the MP5.2 digital electronic control system of the ELYSEE SX car engine are introduced here with the common diagnostic tools.

• 介绍MP5.；2数字式发动机电子控制系统的组成、工作原理及故障诊断方法；并对爱丽舍轿车发动机电子控制系统常用的故障诊断工具做了简要介绍。