故障现象一辆宝马320i硬顶敞篷车,因顶篷故障灯点亮而进厂检修。故障诊断接车后试车验证故障,顶篷能够正常收起和展开,但在顶篷收进行李箱后,顶篷故障灯(图1)点亮,车窗玻璃无法上升。连接故障检测仪调取故障代码,得到故障代码“A6A1CTM硬车顶联锁驱动装置”。记录并尝试清除故障代码,故障代码可以清除,但清除故障代码后,顶篷仍不能正常工作。用故障检测仪查看敞篷控制模块(CTM)的相关数 Trouble phenomenon A BMW 320i hardtop convertible, due to the roof fault light lit and into the factory overhaul. Fault diagnosis After the test car to verify the failure, the roof can be properly stowed and unfolded, but the trunk into the trunk, the roof fault light (Figure 1) lit, the window glass can not be raised. Connect the fault detector to retrieve the fault code, get the fault code “A6A1CTM hard roof interlock drive ”. Record and try to clear the error code, the error code can be cleared, but after clearing the error code, the canopy still does not work. View the number of hood control modules (CTMs) with a fault detector