If you find that the throttle position sensor is fried, take a look at the links below. I suggest you use a wire-piercing probe (click here so that you can see what one looks like: Wire Piercing Probe) to connect to your multimeter.Īnother important tip since these three circuits go directly to the PCM, you need to be careful not to short these wires to power (12 Volts) or you'll fry the PCM.
NOTE: When checking for the signals the wire carry, you should not probe the front of the TP sensor connector's terminals. One very important thing to know is that all three circuits start and end at the PCM (Powertrain Control Module=Fuel Injection Computer) or vice-versa, depending on how you look at it.
The throttle position sensor (TPS) on your 2.3L Ford Ranger (or 2.3L Ford Mustang or Mazda B2300) has 3 wires sticking out of its connector.Įach wire has a specific job to do and below, you'll find out what each wire (circuit) does. You'll need a helper to help you to perform the test steps in TEST 1. To see what this tool looks like, click here: Wire Piercing Probe. This tool is a time saver of the first order.If you need to buy one or are looking to upgrade, check out my recommendations here: Buying A Digital Multimeter For Automotive Diagnostic Testing.A digital or analog multimeter will work.You need a few basic things and they are: I can tell you right off the bat that the one thing you don't need is a scan tool. Hesitation when you step on the accelerator pedal.No power as you accelerate the vehicle.Transmission does not shift out of second gear.P0123: Throttle Position (TP) Circuit High Input.P0122: Throttle Position (TP) Circuit Low Input.P0121: Throttle Position (TP) Circuit Performance Problem.TPS diagnostic trouble codes (DTCs) stored in the vehicle's computer's memory.The very first thing you'll notice, when the TPS goes bad on your 2.3L Ford Ranger or Mustang, is the check engine light shining nice and bright. To test the newer style TPS (1995 and newer), take a look at this tutorial: How To Test The Throttle Position Sensor (2.3L Ranger, Mustang, B2300) (at: ).
You can find this tutorial in Spanish here: Cómo Probar El Sensor TPS (2.3L Ford Ranger y Mustang) (at: ). TEST 3: Testing The Sensor Return (Ground) Circuit.TEST 2: Testing The 5 Volt Reference Signal.How Does The Throttle Position Sensor (TPS) Work?.
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