故障现象一辆2003年产SC7130羚羊车,搭载铃木1.3 L单顶置凸轮轴16气门全铝电控汽油发动机和五速手动变速器,行驶里程约为18.5万km。该车因发动机无法起动而拖至修理厂检修。故障诊断据驾驶人反映,该车在正常行驶过程中突然熄火,然后就无法起动了,曾在其他修理厂试换过火花塞、点火线圈及发动机ECU等配件,又对发动机线束进行了相应的检查,但故障依旧。接车后,首先目视检查发动机室内的情况,发现继电器盒没有盖子,其他基本正常;接着又检查了电控系统各连接器的连接情况,未见异常;随后检查了冷却液 Fault phenomenon A 2003 SC7130 antelope car, equipped with Suzuki 1.3 L single overhead camshaft 16-valve aluminum electric gasoline engine and five-speed manual transmission, mileage of about 185,000 km. The car was towed to the repair shop for engine inability to start. Fault diagnosis According to the driver reflected that the car suddenly turn off during normal driving, and then can not start, and had in other repair shop replaced the spark plug, ignition coil and engine ECU and other accessories, but also the engine wiring harness was the appropriate inspection , But the fault still. After the car, the first visual inspection of the engine room and found that the relay box without a lid, the other basic normal; and then check the electrical control system connector connection, no exception; then check the coolant