What is the definition of a speed sensor?
Definition of a Vehicle Speed Sensor (VSS) A vehicle speed sensor generates a magnetic pulse in the form of a wave proportional to the speed of the vehicle (i.e., imagine a vehicle moving at high speed, the VSS will generate a high-frequency signal directly proportional to this).
How does the vehicle speed sensor ( VSS ) work?
VSS is supplied with +12V from the ignition key. When the tachometer speed cable rotates, the Hall switch is turned on and off consecutively, sending a rectangular signal to the onboard computer. The frequency of this signal indicates the speed of the car.
How do you test a speed sensor on a car?
Open the hood of the vehicle so you can access the engine. Locate and pull the release hatch near the driver’s side door to open the hood. Engage the interior release hatch on the front of your hood and raise the hood up. If your hood uses a rod to hold it open, move the rod to its slot.
How are speed sensors used in the PCM?
The PCM may use other sensors on the vehicle (ABS Wheel Speed) to validate VSS operation. VSS information is used to calculate vehicle loads including: torque converter application, cruise control, fuel cutoff/speed governance strategies, instrument panel speedometer and more.
Definition of a Vehicle Speed Sensor (VSS) A vehicle speed sensor generates a magnetic pulse in the form of a wave proportional to the speed of the vehicle (i.e., imagine a vehicle moving at high speed, the VSS will generate a high-frequency signal directly proportional to this).
VSS is supplied with +12V from the ignition key. When the tachometer speed cable rotates, the Hall switch is turned on and off consecutively, sending a rectangular signal to the onboard computer. The frequency of this signal indicates the speed of the car.
Open the hood of the vehicle so you can access the engine. Locate and pull the release hatch near the driver’s side door to open the hood. Engage the interior release hatch on the front of your hood and raise the hood up. If your hood uses a rod to hold it open, move the rod to its slot.
How many wheel speed sensors do you need?
More than 90% of vehicles on the road today are equip- ped with wheel speed sensors. A vehicle has from two to four such sensors – in most cases fitted opposite the bearing. All third-generation type wheel bearings are equipped with this technology, which requires the presence of 4 sensors per vehicle.