轿车自动变速器的故障往往是由发动机和电控系统引起，也有是由自动变速器本身引起，在进行检修之前，根据由简入繁、由易到难的原则，应先将故障部位大致分清（即发动机故障还是自动变速器故障）。若变速器带有自我诊断系统，则应先进行自诊。检查自动变速器鼓掌一般按以下程序进行：

The faults of automatic transmissions in cars are often caused by the engine and electronic control system, as well as by the automatic transmission itself. Before conducting maintenance, according to the principle of simple to complex and easy to difficult, the fault location should be roughly distinguished (i.e. engine fault or automatic transmission fault). If the transmission is equipped with a self diagnostic system, self diagnosis should be performed first. The inspection of automatic transmission applause is generally carried out according to the following procedure:

（1）先进行基础检查：如变速器油的质量和数量是否合适；节气门拉线记号是否正确；变速操纵杆系及空挡启动开关是否工作正常；空转转速是否合适；轮胎气压是否标准

(1) First, conduct a basic inspection: such as whether the quality and quantity of transmission oil are appropriate; Is the throttle cable marked correctly; Is the gear lever system and neutral start switch working properly; Is the idle speed appropriate; Is the tire pressure standard

（2）然后进行时速试验：以检查发动机和自动变速器的性能。

(2) Then conduct a speed test to check the performance of the engine and automatic transmission.

（3）时滞试验：对液压管道进行基础检查后，通过液压试验来确认液压系统是否有故障。

(3) Time delay test: After conducting a basic inspection of the hydraulic pipeline, a hydraulic test is conducted to confirm whether there is a malfunction in the hydraulic system.

（4）最后道路试验：通过路试，进一步检查变速器的性能，确认故障发生的部位，为变速器检修提供依据。

(4) Final road test: Through the road test, further inspect the performance of the transmission, confirm the location of the fault, and provide a basis for transmission maintenance.