The Sparrow Pride in 2011 lasted about 56,000 kilometers. According to customers, the car has traveled 55213 kilometers. A few days ago, a faulty light suddenly appeared in the driving process. When the engine goes out, it can't start again.

　　故障诊断:预约客户后，安排维修技术人员对车辆进行检查，使用SM3诊断仪器对发动机诊断系统进行检查。故障代码显示P0890自闭继电器故障。为了确定是否偶尔出现故障，维修人员会清除故障代码，然后打开钥匙，车辆顺利启动。

　　Fault Diagnosis: After booking customers, arrange maintenance technicians to inspect the vehicle, and use SM3 diagnostic instrument to inspect the engine diagnostic system. The fault code shows the fault of P0890 self-closing relay. In order to determine whether there are occasional failures, maintenance personnel will clear the fault code, and then open the key, the vehicle starts smoothly.

　　似乎与报道的返修现象不同，客户陪同的路检没有发现异常。这真的是由于未知原因造成的意外故障吗?出乎意料的是，当我进入车站时，我撞上了一个减速带，看到仪表上的AT油在闪烁。然后我进入车间关车，连接诊断仪器检查故障代码，原来的故障代码。

　　It seems that unlike the reported repairs, no abnormalities were found in the road inspection accompanied by customers. Is this really an accident caused by an unknown cause? Unexpectedly, when I entered the station, I hit a deceleration belt and saw AT oil flashing on the instrument. Then I went into the workshop and shut down, connected the diagnostic instrument to check the fault code, the original fault code.

　　当你试图重新启动汽车时，你会发现汽车没有启动，你只会听到启动器上“哒哒哒”的声音。尽管故障再次出现，技术员认为可能是电池故障或发电机故障。从仓库借一个新的蓄电池，但安装后仍不能启动。

　　When you try to restart the car, you will find that the car did not start, you will only hear the "beep" sound on the starter. Despite the recurrence of the failure, technicians believe that it may be a battery failure or a generator failure. A new battery was borrowed from the warehouse, but it could not be started after installation.

　　根据故障代码，发现故障代码所指的继电器实际上是TCM电源。

　　According to the fault code, it is found that the relay referred to by the fault code is actually the TCM power supply.

　　继电器各回路状态良好，无松动现象。把它拿下来，检查继电器本身。静态和动态测试都是正常的。这怀疑中医内部接触不良现象存在于本身,而是因为这个网站没有模型的中医,中医加载,所以不得不继电器,试着用手摇晃两部分测试和震动皮瓣与中医,故障没有出现,但是当帕特继电器在石油仪器上突然亮了起来,立即关闭发动机,车辆不能重新开始。

　　Each circuit of the relay is in good condition without loosening. Take it down and check the relay itself. Static and dynamic tests are normal. This suspicion is that the harmful internal contact of TCM exists in itself, but because the website has no model of TCM, TCM loading, so it has to relay, try to shake two parts of the test and vibration skin flaps and TCM, the failure did not appear, but when the Pat relay suddenly lights up on the petroleum instrument, immediately shut down the engine. Vehicles can't start over.

　　此时，可以说缺陷零件终于被识别出来了。这是中医继电器，内部有松动的地方，这将发生在通过颠簸的道路。更换继电器，故障排除。

　　At this point, it can be said that the defective parts were finally identified. This is a traditional Chinese medicine relay. There is a loosening place in it. This will happen on the bumpy road. Replace relay and troubleshoot.

　　故障总结:在维修口腔时，当出现一些故障时，一定要遵循故障判断的逻辑，尤其是当诊断仪器有比较清晰的故障代码可供参考时，一定不能忽视。

　　Fault summary: When repairing oral cavity, we must follow the logic of fault judgment when some faults occur, especially when the diagnostic instrument has a clear fault code for reference, it must not be ignored.

　　本案例由于维修技师的经验，从开机时“哒哒”的声音，得到了电池故障，于是绕道而行。

　　In this case, due to the experience of maintenance technicians, the battery malfunction was obtained from the "beep" sound when the machine was turned on, so it was detoured.

　　三包政策的出台对我们的维修工作也是一个考验，在短时间内对车辆进行维修，那么故障判断就显得尤为重要。

　　The introduction of the three-package policy is also a test for our maintenance work. If the vehicle is repaired in a short time, the fault diagnosis is particularly important.