案例1迈腾B7L车转动转向盘时有“嗡嗡嗡”的异响故障现象一辆迈腾B7L轿车(装备CGM发动机),在转动转向盘时,转向盘底座处有“嗡嗡嗡”的异响。故障检测接车后,起动车辆,转动转向盘,确认异响来源,最终确认异响来自转向盘与安全气囊滑环接触面附近(图1)。拆检转向盘发现故障原因为:转向盘底座接触面不平,转向盘上端面与安全气囊滑环间隙偏 Case 1 MAGOTAN B7L car when turning the steering wheel “buzzing ” abnormal phenomenon A MAGOTAN B7L sedan (equipped with CGM engine), turn the steering wheel, the steering wheel base at the “buzzing ”Abnormal sound. Fault detection After receiving the car, start the vehicle, turn the steering wheel to confirm the source of abnormal sound, the final confirmation of abnormal sound from the steering wheel and airbag slip ring near the contact surface (Figure 1). Dismantling the steering wheel found the cause of the malfunction as follows: steering wheel base contact surface uneven steering wheel upper end surface and the airbag slip ring gap deviation