The Acura TL Speed Sensor provides the car's computer with accurate data on road and component rotation to enable the car to shift smoothly and provide reliable traction control. Mounted on the output shaft of a transmission, this Speed Sensor translates tooth passages on a reluctor ring into electrical pulses to enable the powertrain control module to time the gear changes, control line pressure, and engage the torque converter clutch at the appropriate moment. Each wheel Speed Sensor tracks individual wheel rotation through the anti-lock brake system, preventing skid and helping the sedan corner safely. Earlier TL generations were based on passive magnetic designs that produce a changing sine wave, and the third generation of TL had active versions using hall-effect and added onboard electronics to create cleaner signals at low speeds and a wider air gap for improved reliability. Though functions are still similar, the active output shaft Speed Sensor is faster in response, and the active wheel Speed Sensor is more resistant to electrical noise. Across subsequent models of the Acura, these updates refine the quality of the shifts. In all Acura sedans, they also enhance braking response, and original Acura engineering ensures current TL drivers continue to enjoy confident performance.
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