丰田已经找到了问题所在。
在踏板总成里面有弹簧机构，当驾驶者松开踏板时，弹簧负责把踏板拉回到原位。但是弹簧会造成踏板用力弹回，从而造成不舒适甚至脚部伤害。于是踏板总成里还装有阻尼器，在踏板弹回的过程里提供摩擦力，从而实现踏板温柔，平滑，稳定地弹回。这次有问题的踏板就是阻尼器在经过一段时间的使用后，阻力增大直至踏板异常缓慢地弹回或者不弹回。
丰田会在召回的踏板总成里面加装一根拉杆，把阻尼器拉离踏板，从而减小卡住的机会。
How Toyota Will Fix Recalled Vehicles
Toyota has pinpointed the issue that could, on rare occasions, cause accelerator pedals in recalled vehicles to stick in a partially open position. The issue involves a friction device in the pedal designed to provide the proper "feel" by adding resistance and making the pedal steady and stable. The device includes a shoe that rubs against an adjoining surface during normal pedal operation. Due to the materials used, wear and environmental conditions, these surfaces may, over time, begin to stick and release instead of operating smoothly. In some cases, friction could increase to a point that the pedal is slow to return to the idle position or, in rare cases, the pedal sticks, leaving the throttle partially open.
Toyota’s solution for current owners is both effective and simple. A precision-cut steel reinforcement bar will be installed into the assembly that will reduce the surface tension between the friction shoe and the adjoining surface. With this reinforcement in place, the excess friction that can cause the pedal to stick is eliminated. The company has confirmed the effectiveness of the newly reinforced pedals through rigorous testing on pedal assemblies that had previously shown a tendency to stick.
Separately from the recall for sticking accelerator pedals, Toyota is in the process of recalling vehicles to address rare instances in which floor mats have trapped the accelerator pedal in certain Toyota and Lexus models (announced November 25, 2009), and is already notifying customers about how it will fix this issue. In the case of vehicles covered by both recalls, it is Toyota’s intention to remedy both at the same time.
