3.2仔细阅读故障代码指示元件或相应系统电路图的说明各个车型的维修手册在对故障代码进行分析的时候,均会给出该故障代码指示元件或相应系统的电路图,在进行故障代码诊断的时候,一定要仔细阅读该电路图,电路中的元件、线路、供电、搭铁出现问题均会导致该故障代码的出现。例如:对上海别克君威轿车发动机控制系统中 3.2 carefully read the fault code indicating element or the corresponding system circuit diagram of each model maintenance manual in the analysis of the fault code will be given when the fault code indicating element or the corresponding system circuit diagram, fault code diagnosis, Be sure to carefully read the circuit diagram, the circuit components, lines, power supply, grounding problems will lead to the emergence of the fault code. For example: Shanghai Buick Regal sedan car engine control system