浅谈自动空调热车不制冷的故障检修

摘 要：当今社会，汽车已成为普遍家庭的代步工具，人们使用汽车的要求也由最初的实用性转到了舒适性。因而，汽车空调作为汽车舒适性能最基本的组成部分，自动空调更是人们的追求。本文主要通过一台丰田凌志LS400轿车自动空调实训台架空调热车不制冷的故障检修，总结汽车自动空调检修的经验。

关键词：自动空调制冷系统 不制冷 水温传感器 故障检修

Discussion about the Troubleshooting of the Automatic Air-conditioning Hot Car without Cooling

Liao Musheng

Abstract：Today， cars have become a means of transportation for common families， and people's requirements for using cars have shifted from initial practicality to comfort. Therefore， as the most basic component of the car's comfort performance， auto air conditioners are people's pursuit. This article mainly summarizes the experience of auto air conditioning maintenance through the failure inspection and repair of a Toyota Lexus LS400 car automatic air conditioning training bench， whose air conditioning hot car couldn’t not get cool.

Key words：automatic air conditioning refrigeration system， no cooling， water temperature sensor， troubleshooting

1 引言

本人近期對一台学生实训用的丰田凌志LS400轿车自动空调台架在发动机热机后空调不制冷的故障进行了一系列的检修，最后检查出它的故障原因竟然是发动机水温传感器内的热敏电阻有问题，致使电控单元ECU误判断发动机冷却水温度过高，为保护发动机而启用切断控制空调模式所导致。