Toyota Speed Sensor

Your car is equipped with a speed sensor to give you the information of how fast or slow your car is through the speedometer gauge, cruise control unit and TCU. The speed can be known by looking into the bobbin or the cylindrical wire or spool shaped coil which speaks for the speed of the car. As the car gets faster, the frequency of the wheel magnet goes beyond the sensor. The speed sensor detects the slowness or fastness of the car through the number of revolution produced by the transmission output shaft. The final output is the result of the translation of the mechanical rotation into electronic impulses.

There are different types of speed sensors that you can use for your car. One of which is a speedometer. Speedometers for car usually give a value higher than the actual speed to ensure that the driver or operator will not exceed the legal speed limit which can be one of the factors of accidents and collisions. The information it can give may not be as accurate as the real speed since there are several affecting factors such as tire diameter or error in the transmission. Electronic speedometers are also used which involves a computer to change the interval between pulses into a digital display. The accumulated count of the pulses can also be used to determine the distance traveled.

 

A tachometer is also used to determine the speed by showing the rate of rotation produced by the crankshaft. It measures the spark rate of the ignition system usually in rpm units. It is of great aid to the driver in choosing the best type of gear and throttle settings which can change depending on the driving conditions. However it can only be used at a certain limit which is usually connected with the speed of the car. Excess speed especially when used at a long time can cause damage. Replacements are available in any on-line store.