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故障现象断开点火开关后,中央显示屏(CID)显示“NO SIGNAL”(图2),持续约5 min后消失。故障诊断用故障检测仪检测,读得故障代码“B7F8C3主机与CID的连接线:无通信”和故障代码“B7F8C3 CID:图像数据无效或损坏”。按照检测计划检查CID与主机之间的线束,拆下主机面板后,发现该车加装了倒车影像及导航系统。分析认为,正常情况下,断开点火开关后,CID与主机之间还是会通过APIX导线进行通信,而将倒车影像及导
Symptom After the ignition is turned off, the center display (CID) shows “NO SIGNAL” (Fig. 2) and disappears for about 5 minutes. Fault Diagnostics Detected with Fault Detector, Read Fault Code “B7F8C3 Host to CID Cable: No Communications ” and Fault Code “B7F8C3 CID: Invalid or Corrupted Image Data ”. Check the wiring harness between the CID and the host according to the test plan. After removing the host panel, it was found that the car was equipped with a reversing image and navigation system. Analysis, under normal circumstances, disconnect the ignition switch, CID and the host will still communicate between the APIX wire, and the reverse video and guide