故障现象一辆丰田CELICA乘用车,行程约5000km,故障现象为发动机故障指示灯常亮。故障检测诊断用故障检测仪调出故障代码为第3缸缺火。顺其思路检查第3缸点火是否正常以及有无缺火现象,进行跳火试验发现火花塞跳火正常且无断火现象。此车装备2ZZ-FE型发动机,点火方式为无分电器电控点火线圈直接点火,发动机为横置四缸。检查4个火花塞发现:第3缸火花 Fault phenomenon A Toyota CELICA passenger car, travel about 5000km, the fault phenomenon is the engine fault indicator light. Fault detection and diagnosis Fault detector called out the fault code for the first three lack of fire. Follow the idea of ​​checking the 3rd cylinder ignition is normal and whether there is lack of fire phenomenon, the flashover test found that the normal spark plug sparks and no broken fire phenomenon. This car equipped with 2ZZ-FE-type engine, the ignition mode without sub-electric ignition coil ignition, the engine is horizontal cylinder. Check 4 spark plugs found: 3rd cylinder sparks