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潍柴电控柴油发动机通过专用诊断仪读取故障描述排除故障

2015/5/15 14:42:48

Cummins diesel engine by special instrument to read the description of the fault troubleshooting

1、利用专用的故障检测仪（博世KTS510F 深圳元征X—431）

1, the use of special fault detector (KTS510F Bosch Shenzhen Yuanzheng X - 431)

2、专用诊断仪诊断连接线口目前有两种：一种是长方形的，16针接线（国际标准）。另一种是圆形的。其中，圆形的诊断接口是各汽车厂家普遍采用的，圆形的诊断接口通常是3条线连线：1是正极，2是负极，8是诊断通讯线，并且与控制单元ECU的K25是对应引脚线。如果连接专用诊断仪后，不能建立诊断通讯，要详细检查诊断接口K8引脚线的通讯状态，如果K8不能建立诊断通讯，说明K8引脚线出现开路、短路的现象，可以直接从控制单元ECU的K25引出连线，并且从整车的主继电器引出正极和负极，并与专用诊断仪的K8、1、2相连，即可诊断故障。

2, chaochai special diagnostic connector port currently has two kinds: one is rectangular, 16 pin connection (international standard). The other is circular. The circular diagnosis interface is widely used in the automobile manufacturers and circular diagnosis interface is usually 3 line connection: 1 is positive, 2 is negative, 8 is the diagnostic communication line, and control unit ECU K25 is corresponding to the pin line. If special diagnostic instrument connection can not be established diagnostic communication, to detailed examination diagnosis interface K8 pin line of communication state, if the K8 cannot establish the diagnostic communication that K8 pin line open circuit, short circuit phenomenon can be directly from the control unit ECU K25 leads to the connection, and from the vehicle's main relay leads to positive and negative, and K8 and special diagnostic instrument, 1 and 2 are connected, can diagnose the fault.

3、在进入读取故障码的存储模块以后，首先要删除一下控制单元ECU故障码。

3, in the memory module into the fault code reading, first of all to delete a control unit of ECU fault code.

4、因为控制单元ECU的故障编码有时是虚拟的，只要删除一下，原来虚拟的故障码就不存在了。剩下的故障码就是当前存在的真实故障码。

4, because the control unit ECU fault code sometimes virtual, as long as the deletion of a, the original virtual fault code does not exist. The rest of the code is the current real fault fault code.