论文部分内容阅读
故障现象一辆2016款凯迪拉克ATS-L车,行驶里程约为2.6万km,因发动机无法起动而拖车进厂检修。故障诊断接车后试车验证故障现象,接通点火开关尝试起动发动机,发动机确实无法起动,仪表盘上多个故障灯点亮。检查蓄电池电压,为12.4 V,正常。连接GDS对车辆进行诊断,无法读取到车辆的VIN码,手动输入车辆的VIN码后进入车辆诊断,发现高速网络上多个控制模块均无法通信(图1)。根据上述检查结果,初步判断该车无法起动的原因是高速网络故障。
Symptoms A 2016 Cadillac ATS-L car, mileage of about 26,000 km, due to the engine can not start the trailer into the plant overhaul. Fault diagnosis After the test car to verify the fault phenomenon, turn on the ignition switch to try to start the engine, the engine does not start, multiple fault lights on the dashboard light. Check the battery voltage, 12.4 V, normal. Connect GDS to diagnose the vehicle, can not read the vehicle’s VIN code, manually enter the vehicle’s VIN code into the vehicle diagnosis and found that many high-speed network control module can not communicate (Figure 1). According to the above test results, the initial judge of the car can not start because of high-speed network failure.