故障现象一辆2010年10月出厂的一汽大众CC车(搭载2.0T发动机,配备02E型6速DSG变速器),行驶里程约为10万km。车主反映,该车在高速行驶中,有时车速在100 km/h~120 km/h,正常踩制动减速到100 km/h左右时,变速器的挡位偶尔会自动掉入D3挡或D4挡,然后再加速,发动机转速已经达到4 000 r/min~5 000 r/min,此时车速已达100 km/h~120 km/h,但变速器依然还处于D3挡(图1),不能正常升入D6挡,而车主能用手动挡使变速器 Symptom A FAW-Volkswagen CC car (equipped with a 2.0T engine equipped with a 02E 6-speed DSG transmission) that was delivered in October 2010 has a mileage of about 100,000 km. Owners reflect the car at high speeds, sometimes at speeds of 100 km / h ~ 120 km / h, normal brake slow down to about 100 km / h, the transmission gear will automatically fall into the D3 block or D4 block , Then speed up, the engine speed has reached 4 000 r / min ~ 5 000 r / min, the speed has reached 100 km / h ~ 120 km / h, but the transmission is still in the D3 block (Figure 1), not normal D6 into the block, while the owners can manually shift the gear