What is a speed sensor circuit?
The vehicle speed sensor (VSS) is how your car knows how fast it’s currently traveling. It sends data to the powertrain control module (PCM) or engine control module (ECM) to help it maintain optimal operation. These interruptions to the circuit are translated into the vehicle speed and output to the ECM or PCM.
How do you fix a speed sensor circuit malfunction?
What repairs can fix the P0720 code?
- Replacement of the output speed sensor.
- Replacement of the input speed sensor.
- Replacement of the wires or connectors.
- Drain and refill of the transmission fluid.
- Replacement of the PCM.
How much does it cost to replace a speed sensor?
To replace the speed sensor, you are going to pay, on average, between $330 and $380. The labor should only cost you between $80 and $100, while parts will run you about $265.
What is the difference between input and output speed sensor?
Typically, two sensors communicate the transmission data to the vehicle’s powertrain control module. The first sensor, referred to as the input sensor, monitors the speed of the transmission’s input shaft. The second sensor is the output sensor, which monitors the output shaft speed.
What is the purpose of a turbine speed sensor?
Input Shaft in Automation – Turbine Speed Sensor. A turbine speed sensor, also termed an input speed sensor, is used for measuring the performance of the turbine by evaluating transmission performance and other components of the turbine.
What causes a speed sensor to malfunction?
Also, the plastic portion of the sensor can become brittle after prolonged exposure to the elements. The magnetic portion of the sensor may also become worn and damaged over time. The speed sensor measures the rotation of a toothed wheel on a shaft inside the transmission to determine how fast your car is going.
What can a motor speed sensor module do?
Here is a motor speed sensor module, the major goal is to check the rate of an electric motor. The module can be used in association with a microcontroller for motor speed detection, pulse count, position limit, etc. In principle, any rate meter simply measures the rate at which some event occurs.
How does a speed sensor work with an Excitor?
Speed sensor and excitor (Fig. 11.40) The speed sensor uses the variable reluctance magnetic sensing principle, whereby a cylindrical permanent magnetic core with a coil wire wound around it, mounted on the stationary hub carrier, axle casing or back plate, produces a magnetic field (flux) which overlaps the rotating excitor ring.
What does output speed sensor malfunction code mean?
It means that the powertrain control module (or transmission control module) perceives a problem with the output speed sensor (OSS) or its circuit. The sensor in question is the one responsible for the display of real-time vehicle speed. The powertrain control module (PCM) receives input from multiple sensors.
How does the voltage of a speed sensor work?
The light detector produces an output voltage whenever a pulse of light from the light source passes through a slot to the detector. The number of pulses generated per second is proportional to the number of slots in the disk and the vehicle speed: