故障现象一辆2009年出厂的吉利熊猫HQ7131轿车,累计行驶约3.7万km,在怠速和低速状态下发动机温度偏高。故障诊断分析导致该车发动机温度过高的原因,有:冷却液短缺;冷却液循环不足或系统堵塞;散热风扇故障。检查冷却液液面,处于中线位置,正常;检查散热器上、下冷却液管,温度没有明显温差,说明节温器能正常开 Symptom A 2009 Geely Panda HQ7131 sedan was delivered in 2009, accumulating about 37,000 km in total. The engine temperature is high at idle and low speeds. Fault diagnosis and analysis led to the car engine temperature is too high, there are: coolant shortage; insufficient coolant circulation or system blockage; cooling fan failure. Check the coolant level, in the midline position, normal; check the radiator, the coolant pipe, the temperature is not obvious temperature difference, indicating that the thermostat can be normally open