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故障现象一辆2012年产桑塔纳志俊轿车。搭载BKT发动机和5挡手动变速器,累计行驶里程约为2.5万km。据驾驶人反应,该车在起步时,发动机自动熄火且无法重新起动着机,同时发动机故障灯异常点亮。故障诊断接车后试车发现,起动发动机时,起动机运转有力,但发动机无法起动着机。用故障检测仪进行检测,读得了8个故障代码(图1),且无法清除;起动发动机时,发动机转速为205 r/min,初步推断曲轴位置传感器信号正常。根据故障代码的提示,检查了燃油泵继电器和喷油器熔丝(图2),均正常;拔下各喷油器导线连接器,接通点火开关,
Symptom A 2012 Santana Zhijun sedan. Equipped with BKT engine and 5-speed manual transmission, the cumulative mileage of about 25,000 km. According to the driver’s reaction, the car at the start, the engine automatically turn off and can not restart the machine, while the engine fault light abnormal lighting. Troubleshooting After the car was unloaded, it was found that when the engine was started, the starter was powerful but the engine could not start up. Tester with fault detection, read the fault code 8 (Figure 1), and can not be cleared; start the engine, the engine speed of 205 r / min, the initial conclusion of the crankshaft position sensor signal normal. According to the fault code prompt, check the fuel pump relay and injector fuse (Figure 2), are normal; unplug each injector wire connector, turn the ignition switch,