由于现代轿车空调蒸发器安装位置较为隐蔽,平常疏于保养,较易发生制冷剂微漏,给维修技工诊断故障带来很大困难。现提供一种方便可靠的快速诊断方法:第一.将空气循环开关开至车内循环档;第二.先向空调系统充入100～300g 制冷剂,然后充入无水氮气至系统压力达784kPa 为止;第三.静置3～15分钟后用举升机将车升起; As the modern car air conditioner evaporator installation location is more subtle, usually neglect maintenance, more prone to leakage of refrigerant, repair technicians to diagnose the fault caused great difficulties. Now provide a convenient and reliable rapid diagnostic method: First, open the air circulation switch to the car circulation file; second, first to the air conditioning system filled with 100 ~ 300g refrigerant, and then filled with anhydrous nitrogen to the system pressure up to 784kPa so far; third. Stand 3 to 15 minutes after the lift with the car raised;