Abstract
The SAE J1939 is a typical CAN bus network communication protocol of integrated electronic system of armored vehicles, which adopts the PDU as a data transmission unit. The agreement can quickly parse out the meaning of the received data to according to data definition; The fault code is used to transfer fault diagnosis information while the SAE J1939 is employed, from which equipment faults can be easily obtained. In this paper, the protocol is described and applied to fault diagnosis application of the engine electronic control box in the armored vehicle. The results proved the protocol is reliable and effective.
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