The throttle position sensor (TPS) is one of the easiest sensors to test on your Ford 1 .9 liter or 2.0 liter 4 cylinder engine.
The best part of testing the TPS is that you don't need any expensive tools. You can test it with a simple multimeter... no scan tool is required for the TPS test.
Also you don't need to remove the TPS from its place on the throttle body to test it since it can be tested while its still on the engine.
In this tutorial I am going to explain the whole test in a step by step manner.
Here are the contents of this tutorial at a glance:
Your vehicle’s computer needs to know how much the throttle plate opens, when you step on the accelerator pedal, so that it can inject more fuel.
It also needs to know when the throttle plate closes, as you’re letting your foot off of the accelerator pedal, so that it can inject less fuel.
So, when the TP sensor fails... the fuel injection computer isn't able to effectively control the amount of fuel injection (and a host of other things) and you're gonna' feel it as you drive your vehicle down the road.
Here a other symptoms of a bad throttle position sensor (TPS) your Ford vehicle may experience:
The throttle position sensor (TPS) is located on the side of the throttle body.
As you're already aware, the throttle position sensor (TPS) on your 1.9L or 2.0L equipped Ford has 3 wires coming out of its connector.
Each wire starts and ends at the fuel injection computer (known in today's tech lingo as the Powertrain Control Module = PCM).
Each one carries a specific type of signal and in this section I'll briefly go over each one.
NOTE: You'll notice in the descriptions below that I did not include the color of the wires. This shouldn't worry you because the circuits are the same regardless of the color of the wires on your specific Ford model. (as long as they're covered by this tutorial -see the ‘Applies To:’ box on the right).
TPS circuit descriptions:
As I mentioned at the beginning of the article, testing the TPS on your Ford vehicle is it hard but you do have to keep certain safety precautions in mind and these are:
The tests in this tutorial are:
“Remember, this hobby is supposed to be your therapy, not the reason you need therapy.”