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故障现象一辆长城炫丽车(车型为CC7150SM03,采用型号为VT2的CVT),行驶了约5 000 km,出现变速器故障灯常亮,但车辆可以正常行驶的现象。故障诊断连接故障检测仪读取故障代码,调得的故障代码为P0872——雪地模式故障,而且故障代码无法清除。正常情况下按下雪地模式开关(图1)后,仪表盘上会有“winter”字样的绿色显示灯点亮,表示变速器处于雪地模式,此时通过一些程序设定使变速器以二挡起步,从而保证车辆拥有更平稳、更柔和的转矩输出,以减小在雪地上起步轮胎打滑的概率。在接通点火开关但不起动发动机时,用数字万用表
Symptom A Great Wall dazzling car (model CC7150SM03, using a model VT2 CVT), traveling about 5 000 km, appeared transmission fault light is on, but the vehicle can be normal driving phenomenon. Troubleshooting Connect the fault detector to read the fault code, tune the fault code is P0872 - snow mode fault, and the fault code can not be cleared. Under normal circumstances, press the snow mode switch (Figure 1), the dashboard will have “winter ” the green light is lit, indicating that the transmission is in snow mode, this time through some programs to set the transmission to The second gear starts to ensure that the vehicle has a smoother and softer torque output to reduce the probability of slipping tires on snow. When the ignition switch is turned on but the engine is not started, use a digital multimeter