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Self-diagnostic Function

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By connecting the HDS to the data link connector (DLC), the HDS can retrieve and indicate the diagnostic results from the MICU via a diagnostic line called K-LINE. The K-LINE is distinguished from the CAN line, and connected to the CAN related ECUs. The MICU is a gateway between the HDS and B-CAN related ECUs, and sends B-CAN diagnostic results to the HDS.

Fig 1: Identifying Self-Diagnostic Function Diagram
G00455456Courtesy of AMERICAN HONDA MOTOR CO., INC.