车型:配置CED1.8T发动机、01V变速器。VIN:LSVET69F792××××××。故障现象:客户反映行驶中偶尔出现发动机水温过高现象,水温表指针已经到表的红色区域极限,同时水温灯报警(如图1所示),空调失效。故障诊断:客户描述的故障中,有两类故障现象,分别是水温过高和空调失效。在笔者看来这两个故障现象其实是有直接的因果关系,因为现代电子控制单元控制比较完善,一旦发动机检测水温过高,如果不切断空调的话,则发动机水温会进一步升 Model: CED1.8T engine configuration, 01V transmission. VIN: LSVET69F792 ××××××. Symptom: The customer reflects the occasional driving water temperature is too high, the water temperature gauge pointer has reached the red region of the table limit, while the water temperature alarm (shown in Figure 1), air conditioning failure. Fault diagnosis: Customer described the fault, there are two types of symptoms, namely, the water temperature is too high and air-conditioning failure. In my opinion, these two symptoms are in fact a direct causal relationship because the modern electronic control unit is relatively perfect. Once the engine detects the water temperature is too high, if you do not cut off the air conditioner, then the engine water temperature will be further increased