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故障现象一辆一汽大众迈腾轿车(采用CBL,发动机和09G自动变速器),累计行驶里程约为12万km,自动变速器出现3挡升4挡时有空转的现象,导致轿车无法高速行驶。故障诊断首先对该车进行路试。试车发现,轿车升入2挡和3挡均正常,当3挡升4挡时发动机转速突然升高,存在着发动机空转的问题,这时仪表盘上的挡位显示红屏(图1),说明是自动变速器有故障,导致了红屏,自动变速器锁挡。继续用VAS5054进行诊断,发现发动机系统与自动变速器系统都存在故障记忆(图2)。接着分别进入发动机系统和自动变速器系统读取故障代码,调得的故障代码分别如图3、图4所示。
Symptom A FAW-Volkswagen Mai Teng Sedan (using CBL, engine and 09G automatic transmission), the cumulative mileage of about 120,000 km, automatic transmission appeared 3 block 4 block when idle when the phenomenon, leading to the car can not speed. Troubleshooting First of all, the car road test. The test car found that the car into the 2 block and 3 block are normal, when the 3 block up 4 block when the engine speed suddenly increased, there is the problem of engine idling, then the gear on the dashboard display red screen (Figure 1) Description of the automatic transmission is faulty, resulting in a red screen, automatic transmission lock block. Continue to diagnose with VAS5054 and found that both the engine system and the automatic transmission system have a fault memory (Figure 2). Then enter the engine system and automatic transmission system to read the fault code, tune the fault code shown in Figure 3, Figure 4.