What does VSS mph mean?
The vehicle speed sensor (VSS) is also commonly referred to as a transmission speed sensor or output shaft speed sensor. It is a small device—typically mounted somewhere on the transmission—that determines how fast your vehicle is going by measuring the rotation of a toothed wheel on a shaft inside the transmission.
What kind of sensor is a VSS?
wheel speed sensor
A wheel speed sensor or vehicle speed sensor (VSS) is a type of tachometer. It is a sender device used for reading the speed of a vehicle’s wheel rotation. It usually consists of a toothed ring and pickup.
How to set multi tester to DC volts?
Set multi tester to ohms and test each wire till continuity, that’s earth. Set multi meter to DC volts. Switch the ignition on and connect one lead to earth.
Can you tell the voltage level of a DMM wire?
Now about your question you can’t determine exact voltage level of signal wire using DMM because it’s interrupt signal & it’s voltage level rise only for some mill seconds. but you can determine which wire is +ve, -ve & signal using voltage deference between each wire (from main board side).
How to determine the speed of a signal?
You can also determine the speed as well using Arduino interrupt and voltage divider (if the signal voltage level higher then 5 volt) Note: I recommend you use oscilloscope etc to determine the exact voltage of signal. Set multi tester to ohms and test each wire till continuity, that’s earth. Set multi meter to DC volts.
What does 12V mean on a multi meter?
Set multi meter to DC volts. Switch the ignition on and connect one lead to earth. One of the remaining 2 wires should read 12v, that’s power. That means the last wire is the signal. I’m no electrician so my simple solution may be too simple but I just did it that way and all is as I predicted.
Set multi tester to ohms and test each wire till continuity, that’s earth. Set multi meter to DC volts. Switch the ignition on and connect one lead to earth.
Where to test for a 5V reference circuit problem?
The easiest place to start testing is at one of the engine sensors (MAP, TPS, etc.). When you confirm that the 5V reference circuit is dead, you need to locate the source of the problem.
Now about your question you can’t determine exact voltage level of signal wire using DMM because it’s interrupt signal & it’s voltage level rise only for some mill seconds. but you can determine which wire is +ve, -ve & signal using voltage deference between each wire (from main board side).
What is the 5V reference circuit voltage drop?
If the 5V reference circuit (in-series) limiting resistor, for example, is 50 ohms and the sensor is 25,000 ohms, then the amperage would be .000199A, or 199µA. The clamp-on amp meter will not be able to measure amperage that low. Also, the voltage drop across the limiting resistor (50 ohms) is around .009V.