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故障现象一辆2006款别克陆尊车,行驶里程约为16.5万km,因自动变速器挡位显示异常而进厂检修。故障诊断接车后,试车验证故障。接通点火开关,发动机无法起动,挡位也锁定在1挡,无法正确显示(图1)。连接故障检测仪,对车辆进行检测,发现故障检测仪无法与自动变速器控制模块(TCM)进行通讯。根据上述检查结果分析可知,该车存在2个方面故障。一是自动变速器挡位显示异常;另一个是故障检测仪与TCM无法通讯。分析可知,造成自动变速器挡位显示异常的可能原因
Trouble phenomenon A 2006 Buick Lu Zun car, mileage of about 165,000 km, due to abnormal transmission gear into the factory overhaul. Troubleshooting After the car, test to verify the fault. Turn the ignition switch, the engine can not start, the gear is also locked in the first gear, can not be displayed correctly (Figure 1). Connected to the fault detector, the vehicle was detected and found that the fault detector can not communicate with the automatic transmission control module (TCM). According to the above analysis of the inspection results, there are two aspects of the car failure. First, the automatic transmission gear display is abnormal; the other is the fault detector and TCM can not communicate. Analysis shows that the possible causes of abnormal transmission gear display