ECU输出接口功率驱动器件故障检修方法

介绍了ECU输出接口功率驱动电路的特点和工作原理。指出ECU输出接口故障一般是由于功率驱动器件损坏引起的。提出了通过ECU输出接口控制端找到相应功率驱动器件的方法；介绍了判断该常用功率驱动器件是否损坏的方法、代换原则以及对特殊封装的功率器件的识别和代换；给出了功率驱动器件更换后的试验方法。如果ECU故障是由输出接口故障引起的，则可以采用所介绍的方法维修而不必更换整个ECU，从而有效降低维修成本。

Troubleshooting of the Power Units of ECU Output Interface

Features and the working principle of the power circuit of ECU output interface are introduced.It is pointed out that failure of ECU output interface is caused generally by damage of power units.It is presented to find the corresponding power units from the control terminal of ECU output interface and how to judge if conventional power unit is damaged,also the substitution principles and identification methods and substitution of specially packaged power units as well as the test methods after power units are replaced are introduced.If the ECU failure results from output interface,it can be repaired with the introduced method,therefore it is not necessary to change the entire ECU,so it is an effective way to reduce the service cost.