濰柴電控柴油發(fā)動機通過專用診斷儀讀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、利用專用的故障檢測儀（博世KTS510F 深圳元征X—431）

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

2、專用診斷儀診斷連接線口目前有兩種：一種是長方形的，16針接線（國際標準）。另一種是圓形的。其中，圓形的診斷接口是各汽車廠家普遍采用的，圓形的診斷接口通常是3條線連線：1是正極，2是負極，8是診斷通訊線，并且與控制單元ECU的K25是對應(yīng)引腳線。如果連接專用診斷儀后，不能建立診斷通訊，要詳細檢查診斷接口K8引腳線的通訊狀態(tài)，如果K8不能建立診斷通訊，說明K8引腳線出現(xiàn)開路、短路的現(xiàn)象，可以直接從控制單元ECU的K25引出連線，并且從整車的主繼電器引出正極和負極，并與專用診斷儀的K8、1、2相連，即可診斷故障。

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、在進入讀取故障碼的存儲模塊以后，首先要刪除一下控制單元ECU故障碼。

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

4、因為控制單元ECU的故障編碼有時是虛擬的，只要刪除一下，原來虛擬的故障碼就不存在了。剩下的故障碼就是當(dāng)前存在的真實故障碼。

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.