故障现象一辆2015款福特新蒙迪欧车,搭载1.5 L涡轮增压缸内直喷发动机和型号为6F35的自动变速器,行驶里程约为1万km,因空调和音响系统均不工作而进厂检修。故障诊断接车后试车验证故障,接通点火开关起动发动机,发动机顺利起动。接通空调开关,空调系统没有任何反应,接通音响开关,音响也没有声音发出。经询问驾驶人得知该车曾因涉水导致车辆被淹,且当时水位较深,几乎没顶。查阅该车的 Fault phenomenon A 2015 Ford new Mondeo car, equipped with 1.5L turbocharged direct injection engine and automatic transmission model 6F35 mileage of about 10000 km, due to air conditioning and sound systems are not working and into the factory maintenance . Fault diagnosis After the test car to verify the fault, turn the ignition switch to start the engine, the engine started smoothly. Connected to the air conditioning switch, air conditioning system did not respond, turn on the sound switch, the sound did not sound issued. Upon inquiry, the driver learned that the car had been flooded due to wading and that the water level was deep at that time and had almost no roof. Check the car’s