Lexus ES350 Speed Sensor is the car's electronic eye for movement, converting the rotation of the wheels or the movement along the road into real-time information the on-board computers use to control acceleration, changing gears and anti-lock braking. Mounted close to a toothed tone wheel on each hub or at the output of the transmission is the Speed Sensor which detects the passing teeth and translates the mechanical rhythm into electrical pulses, which discloses exact vehicle and wheel speeds. Early Lexus ES350 sedans in this line were based on passive Speed Sensor units with simple magnets and coils that produced a raw sinusoidal signal interpreted by the control modules. Within the ES350 platform, with the advancement of electronics, newer editions have taken on active Speed Sensor designs that incorporate signal conditioning directly within the sensor body; these deliver sharper digital waveforms, resist electrical noise better and provide reliable readings over wider air gaps. Though both have the fundamental task of providing speed information to systems such as the engine control unit and ABS pump, the active style provides faster response at very low speeds, an important advantage in the case of gentle stops on slippery roads. No matter what year of ES350 they drive, every Lexus ES350 combines the signals from its Speed Sensor with software that instantly fine-tunes fuel mapping, transmission timing and brake pressure to provide drivers with smooth power delivery, confident stopping and a consistently refined ride worthy of the Lexus badge.
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