故障现象一辆2014款新君越轿车,搭载2.4L LAF发动机和6速手自一体变速器,累计行驶里程约为1 000 km。据驾驶人反映,该车在正常行驶过程中,仪表和多功能显示屏突然黑屏且收音机也无法正常使用。重新起动后恢复正常,但行驶约0.5 h后故障会再次出现。故障诊断接车后试车验证故障,路试一段时间后仪表和多功能显示屏黑屏。连接GDS2读取故障代码,得到3个故障代码(图1),分别是“U150F LIN总线15”、“U0028 Symptoms A 2014 New LaCrosse sedan, equipped with a 2.4L LAF engine and a 6-speed automated manual transmission, has a cumulative mileage of about 1,000 km. According to the driver reflects the car in normal driving process, the instrument and multi-function display suddenly black screen and the radio can not be used normally. Restart normal after restart, but the fault will appear again after about 0.5 h drive. Fault diagnosis After the test car to verify the fault, road test for a period of time after the instrument and multi-function display black screen. Connect GDS2 to read the fault code, get 3 fault codes (Figure 1), namely ”U150F LIN bus 15 “, ”U0028