故障现象一辆顶配大众CC轿车,收音机导航系统无声音输出(图1),喇叭不响,其他功能测试正常。故障诊断使用VAS5052监控到47-音响系统无法进入(图2),在19-网关(数据总线诊断接口)内读到1个故障代码——00463(图3),其含义是数字音响控制单元(J525)无通讯信号,且该故障代码无法清除。同时,读取网关信息娱乐通讯状态的相关数据块,实测导航(140组的第4区)和媒体播放器(143组的第2区)的通讯状态均为1(正常,见图4 Symptoms of a top with Volkswagen CC sedan, radio navigation system no sound output (Figure 1), the speaker does not ring, the other functions tested normally. Troubleshooting Using the VAS5052 to monitor the 47-sound system inaccessible (Figure 2), a fault code -00463 (Figure 3) was read in the 19-Gateway (Data Bus Diagnostic Interface), which means that the Digital Audio Control Unit J525) No communication signal, and the fault code can not be cleared. In the meantime, the related data blocks of the state of the gateway infotainment communication are read, and the communication states of the real-time navigation (area 4 of group 140) and the media player (area 2 of group 143) are both 1 (normal, see FIG. 4