关键词: 大众迈腾 B8 发动机；起动控制系统；故障排除；无法起动；案例分析

Abstract: Taking Magotan B8 engine as an example, this paper introduces the failure cases of engine and failure to start the starter, lists the corresponding fault points according to the engine starting control principle, and explains the troubleshooting methods and diagnostic ideas of different faults in the starting control system combined with the failure cases. In fault diagnosis, the diagnostic idea mainly includes describing the fault phenomenon and characteristics, analyzing the possible causes according to the phenomenon and related fault codes, data measurement and result analysis, and further confirming the fault point and mechanism analysis. In the whole process of fault diagnosis, rigorous diagnostic thinking is particularly important, which is also relatively high requirements for technical personnel, who need to master the control logic of the system. A rigorous train of thought for automobile fault diagnosis is established through fault analysis, which provides a reference train of thought and method for automobile maintenance technicians in automobile fault diagnosis.

Key words: Volkswagen Magotan B8 engine; Starting control system; Troubleshooting; Failure to start; Case analysis