故障现象一辆东风日产骊威车,累计行驶了约4万km此车搭载自动变速器,配置智能钥匙。在起动时只点一次火,便再也无法点火。故障诊断及排除接车后首先用日产专用检测仪检查,无故障代码存储。燃油泵工作正常,拆下火花塞后发现车辆起动时1缸、2缸、3缸火花塞只跳一次火,而4缸火花塞不跳火。用试灯检查点火线圈电源线及搭铁线,均正 Failure phenomenon A Nissan Li Wei car, accumulated a total of about 40,000 km This car equipped with automatic transmission, equipped with smart keys. Only fire once at start-up, and can no longer ignite. Fault diagnosis and troubleshooting After the first car with Nissan detector inspection, fault-free code storage. Fuel pump is working properly, remove the spark plug and found the vehicle starts 1 cylinder, 2 cylinder, 3 cylinder spark plugs only jump once the fire, and 4 cylinder spark plugs do not jump fire. Check the ignition coil power cord and ground wire with a test light, are positive