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A virtual speedometer is a computer-generated tool that displays the current speed of a vehicle or object. The virtual speedometer typically calculates the object's speed based on the distance it travels over time. Such speedometers are programmed using programming languages such as HTML, CSS, and Javascript.
- Overview
- Disconnecting the VSS
- Connecting the Multimeter
- Rotating the Sensor
A vehicle speed sensor, or VSS, is a sensor that is used to determine how fast your vehicle is traveling. If your vehicle’s speedometer stops working or isn’t telling you the correct speed that you’re traveling, you likely have a faulty VSS. You can test your VSS to make sure it’s functioning properly by using a device called a multimeter. Start by disconnecting and removing the VSS from your engine so you can test it. You can then connect it to a multimeter and set the multimeter to the AC setting. Connect the VSS to a power drill so you can simulate the rotation of the vehicle’s transmission and read the multimeter to see if the voltage increases as the speed increases to check if the sensor is working properly.
Turn off your vehicle and find the sensor near the transmission.
Unplug the wiring harness connector and press the pull tab (or button).
Unscrew the hold-down bolt and bracket to remove the sensor.
Make sure the vehicle is turned off to avoid being shocked.
Put the vehicle in park on level ground and turn off any lights or accessories that may draw power from the battery. Remove the key from the engine to make sure it’s completely turned off.
Parking on level ground makes it easier for you to access the VSS.
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
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.
Plug the colored lead cables into their slots on the multimeter.
Your multimeter will have a red and a black lead cable. Plug the black lead into the black colored terminal that’s labeled “COM” which stands for common. Then, insert the red lead into the red colored terminal labeled “V” for voltage, which is what you’re testing.
Push the leads into their slots completely. They may “click” into place when they’re fully connected.
Set the multimeter to AC to test your VSS.
Look for a dial on your multimeter that has numbers and letters on it. The AC, or alternating current, setting may be labeled as AC, V with a squiggly line, or ACV. Turn the dial until the arrow or indicating line is pointing to the AC setting.
Electrical devices, such as your VSS, use an AC current for power.
Find a drill bit that fits securely into the VSS.
In order to simulate the movement of your vehicle to properly test the sensor, you need to rotate the gear inside of the VSS. Insert drill bits into the gear slot on the VSS until you find one that fits securely into it.
Different sensors have differently sized slots, so try out a few bits until you find one that fits your VSS.
Connect the bit to your power drill.
Loosen the chuck, or the piece on the end of the drill, by rotating it so the jaws open up. Slide the smooth end of the bit into the jaws and then slowly rotate the drill to tighten the jaws around the bit so it’s held securely.
Give the bit a gentle tug to make sure it won’t fall out.
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