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故障现象 一辆2005年产帕萨特1.8T轿车,空调不制冷。故障诊断 接车后首先验证故障。该车装备的是自动空调系统,操作空调控制面板上的开关将温度调至最低,出风口无冷风吹出;打开发动机室盖,发现空调压缩机不工作,且散热风扇也不工作。本着由简到繁的诊断思路,首先检查位于仪表台左侧下方熔丝盒中的5号、15号及25号熔丝,发现10 A的5号熔丝熔断,更换该熔丝后试车,空调压缩机依然不工作,但散热风扇可正常运转;接着连接空调歧管压力表组检查制
Failure phenomenon A 2005 production Passat 1.8T sedan, air conditioning is not cooling. Troubleshooting After the car first verify the fault. The car is equipped with automatic air conditioning system, air conditioning control panel on the switch to adjust the temperature to a minimum, the outlet without cold air blow; open the engine compartment cover and found the air conditioner compressor does not work, and the cooling fan does not work. Based on the diagnosis from simple to complex, first check the 5, 15 and 25 fuses located in the lower fuse box on the left side of the dashboard and find out that the 5 A fuse of 10 A is blown. After replacing the fuse, test the vehicle , Air-conditioning compressor still does not work, but the cooling fan can be normal operation; then connected to the manifold air-conditioning manifold pressure gauge inspection system