TEST 1: Testing the Throttle Position Sensor Voltage Signal. How to Diagnose a Throttle Position Sensor with a Multimeter Using a multimeter one of the best ways to determine if a TPS is defective, and even a inexpensive multimeter will do. From what I can tell 2G's TPS adjustment procedure is different than what I've posted for 1G's. The throttle position sensor (TPS) can be tested using a simple multimeter and in this tutorial I'll show you how in a step-by-step way. If the multimeter displays a negative number, for example, the probes are most likely in the wrong place. If you removed the throttle linkage rod (6), refit it now. I then was able to reset it to approx. Car does not have to be running, but ignition needs to be on to get 5v feed going to tps connector. (Yes, and I know this doesn't add up to 5080 in both cases. To check and adjust the TPS you'll need a digital multimeter, two small straight pins, and a screw driver. I fired it up basically cold and the idle was much better and smoother than before but seemed like it was just a tad too fast. The red or positive (+) wire on your multimeter will go to the pin in the green wire. Step 1: Gather your tools A. Multimeter (set to DC voltage- 20 scale) B. Should be about 0.49v @ idle, and 4.5v @ WOT. Here's a brief tutorial on my method of adjusting the APS (accelerator position sensor) on a Kia Forte. I have Kpro but was told I needed to calibrate the TPS with the multimeter before setting it up in KManager. There's really no other way to do it without the multimeter. After that I was able to hook up the multimeter with the TPS connector cable and adjust the TPS to .650-.660 volts as described in many forums (and by the cable manufacturer). Let's take a look at what your test results mean: CASE 1: The multimeter registered 4.5 to 5 Volts.This is the correct test result and confirms that the fuel injection computer and the circuit is supplying the TPS with power. Still, I now have some reference figures.) You either have to get k-pro, or spend $20 and buy a multimeter. The FSM procedure is to set where the IPS opens and closed in relation to throttle shaft opening. What you will need: 1. This will take a while to do since the sensor is very hard to adjust due to its sensitivity. TPS Adjustment procedure Short Version.....adjusting the idle voltage (1) Find the yellow wire leading to the TPS and carefully pierce the insullation with the positive lead of your multimeter (make sure that you seal that bare spot when finished). Since the TPS by definition is monitoring the throttles position, it’s located on the throttle body. *note: This post covers the accelerator position sensor (APS) not the throttle position sensor (TPS). A modern car consists of many components and assemblies. If it is set too high, it will have a hard time detecting the voltage of a weaker current. Slapped the multimeter on the terminals and received a reading of 794Ω as below. As long as the connector is attached to the TPS during measurement. If not, loosen 2 TPS retaining bolts and rotate until continuity has just barely been achieved. Then unscrew Idle screw so Throttle injector butterflys are fully seated == no tickover. Multimeter or Ohm Meter 2. Carefully tighten the screws to 31 In.Lbs. go back to the engine bay and loosen the two philip screws that hold the TPS on the throttle body then and tighten until snugish, turn the TPS left to right while waching the multimeter you want it to be .50v. Wait a minute for the engine idle to level off, then use a pen and paper to write down the RPMs that your engine settles and idles at. Dave Ex HVUK, Aug 10, 2011 #6 (3.5 Nm) when the voltage is 0.70 +/- 0.01 Vdc. To test this sharply open the throttle and watch for the voltage change, under high vacuum (e.g. Adjust this until the idle reading on the tps is about 0.48-0.49v. This is a very touchy adjustment and your reading will likely change slightly when you tighten the screws back up, you need to compensate for this change when adjusting, it needs to be .700 when tight. I went out to the shed after reading your post on the TPS adjustment. To adjust the TPS all you have to do is loosen (don't take them out) both screws and move the TPS until you see the right voltage. Using the TPS test tool, verify the TPS is set to 0.70 +/- 0.01 Vdc. Maybe enlarging slightly sidewards the original Duke 390 TPS fixing holes with a Dremel or a drill (carefully) should provide more than enough room to do the adjustment. Now turn on your multimeter and set it to volts (DC), connect it to terminals 1 & 2 and start the engine. In this tutorial, we're gonna' test the throttle position sensor part of the TPS assembly. Minimum differences in TPS position make big changes on TPS tool readings. To hook the multimeter up you will have to pierce the green wire (red arrows) with a pin so you can check how much voltage is going through it. You basically screw the sensor enough so that you can still move it around. ... All you need from the tools is a multimeter. The contents of this tutorial at a glance: Symptoms of a Bad Throttle Position Sensor. The owner of the video made it private. When you press down on the gas pedal, your throttle body unit's valve opens. This can be viewed most easily with an analog multimeter, but a digital multimeter works as well. This feature is dependent on the throttle valve. You may need to let the engine run for a few minutes in order for it to come down to its normal idle speed. Open the throttle rotor to WOT and keep rotating the sensor until you get the output shown on the multimeter to 4.5v. Rotate tps slightly until you can get your settings. 7mm socket with extension and a lot of patience. As you open the throttle plate, the digital multimeter should increase to 5 volts. Tighten 2 screws. I loosened the TPS and moved it until the voltage was 0.99-1.00V on my multimeter and then tightened the screws back down. If the digital multimeter reads between .2 to 1.5 volts, then the throttle position sensor is working correctly. Insert the key into the ignition and start the engine. This causes your throttle position sensor to adjust the engine intake manifold accordingly. Adjust wide open position first and lock the tb down. Volume controls, tone controls, and balance controls are all three-terminal potentiometers. To make your voltage adjustment, loosen 2 small screws that hold clamps that hold the tps. Screw it all the way, but try to be as still as possible as any sudden movement will change the value on the multimeter. Circuit (Wire) Descriptions of the TPS. Gently! To test the TPS you don't need a scan tool (although having one is major plus). TPS Adjustment Procedure and Testing Procedure - Coming soon IAC Test Procedure This is the Throttle Position Sensor Adjustment Procedure. To adjust the Throttle Position Sensor you will require a T-25H Security Torx bit to undo the two bolts that hold it in place on the right side of the rear Carburettor and a Multimeter to measure the … Disconnect 3 wire harness. First set airbypass screws to 0 by screwing all the way in. The factory spec for TPS voltage on a 2G is so wide that it's only to verify defective TPS's. The FSM requires an OBDII to check current data of the throttle position while adjusting … 2G's critical adjustment is the Idle Position Switch that's part of the TPS. ... You can adjust the position of the TPS with a multimeter but you need to know what value is stored in the ECU to set it up correctly. If you are lucky enough to have a scanner (Auto XRay Scanner) and know how to incorporate this into this adjustment, by all means … go right ahead! TPS is a fancy new name for the old three-terminal potentiometer that is commonly known by many different names. I couldn't get the idle under 1400 until I took the TPS off and turned the "double smile" so that it would catch the butterfly lever while it was completely closed. Throttle position sensor. Set this reading to exactly .700 , this is done by loosening the 2 screws on the TPS sensor which is on the MAG side throttle body. The multimeter range has to be set to the correct maximum voltage for the circuit in order to get the most accurate result possible. My car read .675 and obviously when I moved the throttle reel, the throttle motor will move the TPS and the voltage will raise. So, turn on the ignition and look at … Picture 2 To hook the multimeter up you will have to pierce the green wire with a pin so you can check how much voltage is going through it. if you quickly open the throttle fully) the voltage value should quickly change to 4.5+v and then settle … - Tighten tps sensor down & adjust idle setting screw shown in the pic below. Wire Colour & Purpose P= +5V reference Y= TPS position signal to ECU BR= TPS idle switch BK/DB= sensor ground. To adjust the TPS base-line, slightly loosen the screws, then slowly turn the TPS clockwise or counter-clockwise to adjust the voltage. WOT setting is more important than idle. Adjust it until its at .65 volts on the multimeter. The multimeter should display 4.5 to 5 Volts on its screen. Start the engine and take note of the idle RPMs. You need a good digital multimeter to set TPS ( Throttle position Sensor) and a good set of Vacuum balancer guages or carbtune sticks. Here are the contents of this tutorial at a glance: Symptoms of a Bad Throttle Position Sensor (TPS). It is nothing more than a variable resistor and can be checked with Digital Multimeter (DMM). If you adjusted the throttle linkage rod (6), set it back to its approximate original position. If the throttle position sensor test does not reach 5 volts, this is a sign that the throttle position sensor needs to be replaced. Then use the idle adjustment screw to adjust idle voltage. A pin or needle (mine have alligator clips attached to them) C. 1) Locate the TPS on your vehicle. 6. How to Adjust the Throttle Position Sensor Before adjusting the TPS make sure that you do a carb sync and set the idle speed beforehand as this could effect the reading. This vital sensor allows your engine to maintain a proper amount of air. Open and close the throttle a few times to check the idle setting is stable and adjust if required. Some may also elect on making jumper wires to go from the TPS connector to the TPS and attach the voltmeter, via clip-leads. The TPS set up routine reads the mv value of the TPS with the throttle closed and stores this value in the ECU as the baseline for the fuelling. Detach TPS connector. 306 GTI-6 TPS (Throttle Position Sensor) Testing With A Multimeter The TPS on a Peugeot 306 GTi-6 is located under the throttle body and can be easily accessed by … When installing and adjusting the TPS, some tips: 1. In this tutorial, I'm gonna' show you how troubleshoot the throttle position sensor (TPS), on your Honda Civic, with a multimeter and in a step-by-step way. And even a malfunction of the smallest of them can lead to very serious consequences. Reconnect temp sensor. This is a pretty simple test that can be easily be done with a multimeter. What Is a Throttle Position Sensor? Not very big. The manual has you place a 0.0177" (0.45mm) feeler guage between the stop screw and the throttle pulley to open the butterfly and then adjust the TPS right to where the IPS (pins 3 and 4) switches from closed … How the Throttle Position Sensor (TPS) Works. The voltage should fluctuate between 0.1 and 5v depending on the engine load. Either my multimeter is off, or there's some additional resistance in there. Screw Driver (Philips) 3. The only apparent difference is holes in the TPS the fixing mount to allow adjustment. TPS Adjust (mechanical) Engine off. RESISTANCE TEST: is only to test the tps. The TPS is now set and the horizontal throttle body stop screw (7) should not be touched again. If you have a logger that will show the actual value of the idle position switch then you can use it to replace the multimeter for measuring continuity. Connect ohmeter to 2 bottom pins (BR and BK/DB) and you should get continuity. Set your meter to 10kΩ. 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