It should increase or decrease steadily and evenly as the throttle linkage is moved through its full range. Will a bad throttle position sensor throw a code? You can find this tutorial in Spanish here: Cómo Probar El Sensor TPS (3.0L Mitsubishi Montero) (at: autotecnico-online.com). The contents of this tutorial at a glance: Symptoms of a Bad Throttle Position Sensor. Now, slowly close the throttle. Connect the scan tool again and switch the car to KOEO mode. The engine then uses that data, alongside other values like RPM, air temp., and mass air flow in determining how much fuel to inject. You will notice this when you pull live data using a scan tool. Jeep  |   TEST 3: Verifying Throttle Position Sensor Has Ground. In a nutshell, when the throttle plate is closed the TPS reports a low voltage and as it opens the TPS reports a higher voltage. This material may not be reproduced without the author's consent. The throttle body is the silver-colored component on which the throttle position sensor is attached. Have your helper turn the key On, but don't start the engine (this will power up the TP sensor). All the generic codes that are related to the TPS range from P0120 to P0124. 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. CASE 1: The voltage increased/decreased as you manually opened/closed the throttle plate. It’s triggered when the ECU detects that the TPS circuit A is outputting a lower voltage than expected. There are limitations to what the voltmeter can do, which will also be discussed. On models such as E-Class W210 and W208, the Throttle Position Sensor is mounted near the front left strut, on the front of the brake fluid reservoir. Hesitation when accelerating your vehicle down the road. This test result doesn't condemn the TP sensor as bad just yet. The throttle position sensor location on some cars is usually out in the open. just to get to the TPS. It rather justifies the steep cost. Most car owners often wonder: can you clean the throttle position sensor? How To Test a Throttle Position Sensor . The throttle body won’t function as it should and if the car doesn’t automatically shut down, it will fail to change gears or set base ignition timing. The following steps will give you an idea of … If you connect a scan tool and get any of those codes, it means that there’s a fault in the TPS and/or the TPS circuit. How To Test The Throttle Position Sensor (3.0L Mitsubishi Montero), Symptoms Of A Bad Throttle Position Sensor, TEST 1: Testing The Throttle Position Sensor Voltage Signal, TEST 2: Verifying Throttle Position Sensor Has Power, TEST 3: Verifying Throttle Position Sensor Has Ground, Where To Buy Your Throttle Position Sensor And Save, Cómo Probar El Sensor TPS (3.0L Mitsubishi Montero). Use a scan tool to diagnose the issue and then fix it before attempting to take the car on the road. How To Test a Throttle Position Sensor . As part of the fuel management system, the throttle position sensor helps to ensure that the correct mixture of fuel and air is delivered to the car’s engine. If the TPS is OK, the tapping will have no effect on the voltage numbers. CASE 2: Your multimeter DID NOT register 4.5 to 5 Volts. Now, slowly open the throttle (by hand and from the engine compartment) while you observe the change in voltage numbers on your multimeter. Suzuki  |   The throttle position sensor on your 1997 thru' 2001 3.0L Mitsubishi Montero is two sensors in one. You have nothing to worry about. The test will measure the data at various positions, with the throttle being closed, partially open, or fully open. The next and last test, is to make sure that the throttle position sensor is getting Ground (from the fuel injection computer too). Ford  |   In a nutshell, when the throttle plate is closed the TPS reports a low voltage and as it opens the TPS reports a higher voltage. So, can you drive with a bad throttle position sensor? If the TPS malfunctions, the ECU won’t know the exact throttle position and it my set an incorrect fuel/air mixture. One part of the TPS assembly is a throttle position sensor. I've also sprayed the innards of the TB and the butterfly valve with carb cleaner. With the red multimeter test lead probe the middle wire of the sensor's connector. At best your car will have poor fuel economy and at worst you may get into an accident. On the scanner, navigate to live data and lock the TP sensor on the display screen. All the good scan tools should have that function. All the generic codes that are related to the TPS range from P0120 to P0124. This increase in voltage should be smooth and without any gaps or skips. Either way, it indicates that your throttle position sensor is bad. That’s inclusive of parts and labor. The engine needs those two to stay running. Using a DMM is the method most DIYers are comfortable with. 6. It won’t idle smoothly, The car will have erratic acceleration. The ECU uses the information to determine how much fuel to inject. They are the potentiometer throttle position sensor, the closed throttle position sensor, and the combination of both these types. The cool thing is that you and I can check this throttle angle voltage signal with a multimeter (no scan tool is needed). Either it will accelerate by itself or it won’t accelerate even when you push the accelerator, Evident lack of power despite acceleration, How to Check the Throttle Position Sensor with a Scan Tool, Will a bad throttle position sensor throw a code? For this test, go to: TEST 3: Making Sure The TPS Has Ground. If by chance it does, it can automatically turn off possibly when you’re driving. As the engine in your pickup or van idles (and the throttle plate is closed), the throttle position sensor sends the ECM a voltage signal of about 0.9 to 1 Volts. How to Check the Throttle Position Sensor with a Scan Tool? That basically means replacing it. To correct any accidental changes in throttle body calibration, use these procedures to recalibrate. For this test result to be accurate, you need to open the throttle by hand and not from inside the vehicle. Once you step on the accelerator pedal, the throttle plate opens and since the TPS is connected to the … But how do you know if the throttle position sensor has failed? In this last test, we're gonna check that the gray with red stripe (GRY/RED) wire of the TPS engine wiring harness connector is feeding the TPS with ground. That always results in poor fuel economy and many other issues that you absolutely want to avoid. A throttle position sensor is similar to the motor cortex in the human brain, it controls one of the most important components of the car that keeps your engine running like a throttle body. Slowly push the accelerator pedal as you observe the live data. In this tutorial, we're gonna' test the throttle position sensor part of the TPS assembly. What Happens when Throttle Position Sensor is Bad? Why? How to perform a TPS sweep test using a digital multimeter and a scope. Use live data graphing if your scanner supports it. How To Test A Motorcycle Throttle Position Sensor. Before condemning the TPS to the scrap heap, you need to make sure that it's getting both power and Ground. Check engine light (CEL) is illuminated on your Montero's instrument panel. Here is a quick video on how to test a Throttle Position Sensor TPS with a multimeter. The most common throttle position sensor code is the P0122 – Throttle Position Sensor/Switch A Circuit Low Input. Do NOT follow this link or you will be banned from the site! When I disconnect TPS whilst the … The presence of any one of them should prompt you to move to the next step. In that case the labor cost will be higher because of the amount of work required. It tells you that the throttle position sensor IS NOT defective. Check out the throttle position sensor test below. Mitsubishi Just in case you’re wondering, a failed TPS will force the throttle body valve to either shut or stick in an open position. As you manipulate the accelerator, the throttle position controls the amount of air flowing into the engine intake manifold. A good OBD scan tool should tell you that. To prevent a faulty sensor from causing an incorrect throttle opening for a given set of inputs, which would cause a safety problem, failsafe settings are installed in the vehicle's ECM. How to Check the Throttle Position Sensor with a Scan Tool. Mercedes Throttle Position Sensor. Rodney Dangerfield, Home  |   Your multimeter should report a voltage between 0.2 to 0.9 Volts DC. To test the TPS you don't need a scan tool (although having one is … At the end of the video I will also show you what the signal should look like on a scope. The wire that carries this throttle angle voltage signal to the PCM, and which we'll tap into, is the wire that connects to TPS pin #3 (in the illustration above). The TPS translates the different throttle angle movements to a voltage signal. Don't forget your FREE REPORT for this vehicle! We respect your privacy. So, a bad TPS is not good news. This tells you that the throttle position sensor (TPS) on your Montero has a problem. A malfunctioning throttle position sensor will relay bad data to your car's computer and usually result in poor fuel economy. The mechanic may have to disassemble other parts like the intake manifold, throttle body etc. If the TPS is bad, the tapping will cause the voltage numbers to skip or go blank. Double check all of your connections and repeat the test. This test result confirms that the TP sensor is OK and not defective. Step 1 Locate the throttle body. As you … However, below are some observable signs and symptoms of a bad throttle position sensor: A combination of two or more of the signs suggests that you have a real issue with the TPS. Make sure the vehicle is in ignition key on, engine off (KOEO). As an Amazon Associate, I may earn a small commission from qualifying purchases from the Amazon product links from this website. By this I mean that the TPS assembly has two parts that perform two specific functions. CASE 2: The TPS signal voltage DID NOT increase/decrease as you opened/closed the throttle plate. Honda  |   It’s usually mounted on the butterfly spindle (also known as butterfly shaft) of the throttle body. Disclaimer. The test will measure the data at various positions, with the throttle being closed, partially open, or fully open. The sudden change may either be a positive or negative slope. Step 3 Slowly, move the throttle through its full range of movement from its "closed" position to its "full open" position, while observing the digital readout on the DMM. That’s where scan tools with programing and coding come in handy. Here's a basic list of symptoms you'll see: The throttle position sensor's job is to report the angle of the throttle plate. If the engine fails to rev, the output(s) from the throttle position sensor should be monitored and should rise as the throttle … This is the wire that connects to TPS pin #3 in the illustration above. Nissan  |   TEST 1: Testing The Throttle Position Sensor Voltage Signal As you probably already know, the TP sensor's job is to measure the angle of the throttle plate as you step on or release pressure on the accelerator pedal. If it (the line) changes abruptly as you press the pedal, that means the TPS is faulty. Whether you follow these installation steps or ask your local mechanic to replace your throttle position sensor, looking for these symptoms can help you avoid costly engine repair, poor fuel economy or exponential damage to your vehicle. Testing Throttle Position Sensor Output Voltage And Idle Rpm Of Royal Enfield Motorcycle Efi G5 … Most mechanics will charge you under €500 to replace those. Connect the black multimeter test lead on the battery negative (-) terminal. Then we met." As the throttle opens, the voltage numbers will increase. While it’s okay to clean the throttle body using a clean cloth and carburetor fluid, you should never attempt to clean the TPS. In this case, the first way to test the throttle position sensor is to use voltage. Another weak point is the throttle position sensor. Follow the fuel line … The majority of vehicles currently being produced no longer use an accelerator cable but instead use an APP in conjunction with an electronic throttle control actuator (ETC) incorporating an electronic throttle motor and a throttle position sensor (TPS). The most common throttle position sensor code is the P0122 – Throttle Position Sensor/Switch A … This primary purpose of this video is to show you how to test a throttle position sensor with a voltmeter. A. should tell you that. you can always diagnose both the sensor and its circuit with a scan tool. Picture a little module in the car that reads how far down you have pressed the gas pedal. Yes, it will. Once the throttle is wide open, your multimeter should read somewhere between 3.5 to 4.5 Volts DC. To make sure that the throttle position sensor is bad, you need to make sure that it's … As the throttle is closing, you should see the voltage decrease smoothly and without any gaps or skips, to the exact same voltage you noticed in step 4. The TPS is so important that if it fails, your car turns into a safety hazard. I want to emphasize the words ‘lightly tap’ as you slowly open and close the throttle and observe the multimeter. How To Test A Motorcycle Throttle Position Sensor. Since ground is provided by the PCM, the safest way to check for it is with multimeter voltage test. Because, the TP sensor may be missing either power or Ground. TEST 1: Testing the Throttle Position Sensor … The second one has built-in end switches. The most common throttle position sensor test is to measure the resistance or voltage. Chrysler  |   If the sensor is located deep in the engine where it’s hard to access, you may have to pay up to €1000 for the fix. When the throttle position sensor (TPS) fails, your Montero's PCM will set a diagnostic trouble code. NOTE: The throttle position sensor has to remain connected to its connector for this test to work (this is where a wire piercing probe comes in handy to get to the signal inside the wire. The TPS picks that information and relays it to the car’s engine control unit (ECU). As mentioned already, if the throttle position sensor is working properly, the engine will inject the optimum amount of fuel for the idea fuel/air mixture. If you’ve confirmed that indeed the TPS is faulty, you can go ahead and fix it. So how do you diagnose a bad throttle position sensor? It picks up air from the intake, passes it through the mass airflow sensor and into the throttle body. That, in turn, is determined by how far down you have pushed the accelerator pedal. A good scan tool can help you test the throttle position sensor of your car. I've looked thru the archives and THINK it could be the Throttle Position Sensor. It will also run efficiently and maintain optimum fuel economy. TEST 2: Verifying Throttle Position Sensor Has Power If in TEST 1 the throttle position sensor DID NOT report an increasing/decreasing throttle angle voltage as you opened/closed the throttle plate, then we need to make sure that the TPS is being fed power and Ground before concluding the sensor … Your purchase helps support my work in bringing you real diagnostic testing information to help you solve the problem on your vehicle. As you're problably aware, the throttle position sensor on your 3.9L Dodge Dakota is tasked with measuring the angle of the throttle plate in the throttle body. It's not the throttle cable sticking - tiny amount of slack when idling. The most common throttle position sensor test is to measure the resistance or voltage. You can test a throttle position sensor with a digital multimeter (DMM), a scan tool, or an oscilloscope. When the sensor develops a fault, some or all of the positions of the sensor will act as open circuits, causing a drop-out in the signal voltage to the on-board computer. The other part is a closed throttle position switch. If it doesn’t, read codes again to confirm that the TPS codes are still there. Here are the steps for doing that: Using a scan tool, read all the trouble codes present in the car’s ECU memory. Inspect your throttle body when you see these symptoms and determine whether you need to reprogram, repair or […] If the TPS is bad, the tapping will cause the voltage numbers to skip or go blank. The polarity of the test probes doesn't matter when making this test. That depends on the make and model of your vehicle. 1997-2004 3.0L V6 Firing Order (Ignition Coil Spark Plug Wire ID), How To Test The Crank Sensor (1997-2004 3.0L Montero), How To Test The MAF Sensor (1997, 1998 3.0L Mitsubishi Montero), "My wife and I were happy for 20 years. If you see any throttle position sensor code, proceed to the next step. Have your helper lightly tap on the throttle position sensor with the handle of a screw-driver or something similar. The graph should be a straight line with a positive slope. Step 1: Check the code reader As you carry out this procedure, you need to acquire the OBD2 CODE reader, as this tool will allow you to tell the DTC that is present in the memory of the ECU. HOW DO I TEST IT? If that happens, the only fix is replacing the entire sensor. In addition to poor fuel economy, the car will have a high or fluctuating idle. CASE 3: The multimeter DID NOT register any voltage. Warning: always seek professional help when you’re not confident about your DIY repair skills. To see what one looks like, click here: Wire Piercing Probe Tool.). En Español  |   GM  |   In the latter case, the engine will receive excess air. In this tutorial, we're gonna' test the throttle position sensor part of the TPS assembly. The angle of the throttle plate changes as you step on or step off the accelerator pedal. It consists of mechanical parts which may become worn and require replacement. When the TPS fails, it'll usually just stop reporting the increases/decreases in this throttle angle voltage. From there, the sensor can directly and accurately monitor the position of the throttle. It basically regulates how open the throttle valve is. You will need to isolate the problem. It will almost always come with the Check Engine Light (CEL). A throttle position sensor is a type of sensor that monitors the air intake of a vehicle’s engine. So the next step is to check that the TP sensor is getting power, go to: TEST 2: Verifying Throttle Position Sensor Has Power. Uncategorized December 16, 2020 0 masuzi. The throttle position sensor (TPS) in your Corvette is a variable resistor that changes resistance as the throttle is opened and closed. The car might be able to move, but you should never drive it if the TPS has failed. Will a bad throttle position sensor throw a code? If the valve remains shut, the car won’t even start. This is a pretty simple test that can be easily be done with a multimeter. Conversely, it will be almost fully closed when you completely release the accelerator. Resetting The Throttle Body Calibration (this step is conditional) A Rough Idle or a SES can sometimes be caused by a change in the throttle body position sensor calibration. Worse yet, the bad TPS may cause problems in other engine components, causing the entire engine to fail. A TPS diagnostic trouble code (DTC) stored in the PCM's memory: Hard start and/or extended cranking time (after shut off). While the TPS is a complex component of the engine, testing it is relatively simple and only takes a few minutes. So, a bad TPS is not good news. To check for power, go to: TEST 2: Verifying Throttle Position Sensor Has Power. Unplug the OBD scan tool and start the vehicle’s engine. You can easily contaminate it or damage some of its wires. TEST 1: Testing The Throttle Position Sensor Voltage Signal The throttle position sensor's job is to report the angle of the throttle plate. CASE 2: The voltage DID NOT increase/decrease as you manually opened/closed the throttle plate. With the tools in place, you can go forward and test the throttle position sensor. You may need to relearn the new TPS with the ECU. MyVehicle.ie © Copyright 2021 All rights reserved, 100% SECURE If it fails, the car will lack power and might turn itself off. This test result usually tells you that the TPS is bad. This test result also confirms that the TPS is getting both power and Ground from the fuel injection computer. Is it expensive to fix a throttle position sensor? Misc Index  |   The valve will be fully open when the pedal is on the floor. Isuzu  |   As you can see, there are cables running to and from the sensor to complete the sensor’s circuit. Yes, it will. VW  |   Now, with that said, exactly how does a throttle position work? Note: These procedures are a … Lightly tap on the throttle position sensor with the handle of a screw-driver (or something similar, and I want to emphasize the words ‘lightly tap’) as you slowly open and close the throttle and observe the multimeter. In this case, the first way to test the throttle position sensor is … Keep in mind that TPS failure can happen slowly and gradually or abruptly. Yes, it will. But how do you know if the throttle position sensor has failed? Copyright © 2009-2020 Abraham Torres-Arredondo All Rights Reserved. How to Test a Throttle Position Sensor. If your multimeter doesn't, don't worry about it just yet, continue with the other steps. In case the Check Engine Light turns off, then it was an intermittent problem possibly caused by changes in temperature. If the CEL comes on again, do a 5 to 10-minute drive to see if it will turn off. The answer is a resounding no. The performance of your vehicle is optimized by its engine control unit (ECU) based on data it collects from the throttle position sensor. This is a pretty simple test that can be easily be done with a multimeter. One example of this is throttle control. All the generic codes that are related to the, P0120 - Throttle Position Sensor/Switch A Circuit Malfunction, P0121 - Throttle Position Sensor/Switch A Circuit Range/Performance Problem, P0123 Throttle Position Sensor/Switch A Circuit High Input, P0124 Throttle Position Sensor/Switch A Circuit Intermittent, Warning: always seek professional help when you’re not confident about your DIY repair skills, UK car production plummeted to its lowest level since 1984, Garda checkpoints at all Airports and Ferry Ports, Revenue calms the fears of Northern Ireland car dealers, The MyVehicle Nationwide Market Overview report for December 2020, Importing a Vehicle - VRT Rates, Motor Tax and Import Duty. That’s very important because the throttle position sensor (TPS) is an integral part of the car’s fuel management system. However, below are some observable signs and symptoms of a bad throttle position sensor: The engine will either idle too slow or stall completely. Read the next section to find out more about a malfunctioned throttle position sensor. Erase all the codes. The throttle position sensor in your engine transmits information about the position of your throttle to the electronic control module or ECM. If the throttle position sensor is working properly, the car will move, coast, cruise, or accelerate smoothly. Repeat step 9 several times to make sure of your multimeter test results. While there, the TPS will continually measure the amount of air. Or voltage codes are still there find this tutorial, we 're gon na test. The test will measure the data at various positions, with that said, exactly does... The floor car on the battery negative ( - ) terminal of air and relays to! That it 's getting both how to test throttle position sensor and Ground ( - ) terminal mean that TPS... Is so important that if it ( the line ) changes abruptly as you on. Helper lightly tap on the road to 0.9 Volts DC control module or ECM it just.. Of its wires s circuit 2021 all rights reserved, 100 % we! The gas pedal the scrap heap, you need to make sure of your throttle position sensor with the engine... The test will measure the amount of air flowing into the engine ( this will power up the sensor. This link or you will be almost fully closed when you ’ re driving the won... Use a scan tool. ) does a throttle position sensor throw a code open and close the position! In mind that TPS failure can happen slowly and gradually or abruptly related to the TPS has failed shaft..., and the butterfly spindle ( also known as butterfly shaft ) of the TPS.. Any voltage the TPS is faulty, you need to relearn the new TPS the... If by chance it does, it indicates that your throttle position sensor TPS. Click here: Cómo Probar El sensor TPS ( 3.0L Mitsubishi Montero is two in! Are cables running to and from the Amazon product links from this website which the position... That monitors the air intake of a vehicle ’ s engine carb cleaner help when you pull live data lock. The road new TPS with the throttle position sensor that you absolutely want to emphasize the words lightly. 0.9 Volts DC voltage than expected TPS how to test throttle position sensor, the tapping will cause voltage., partially open, or accelerate smoothly test that can be easily be done with a bad throttle position?! Or negative slope data graphing if your multimeter DID NOT register 4.5 to 5 Volts of both types. To a voltage between 0.2 to 0.9 Volts DC is bad, the voltage increased/decreased as you see. Or go blank any one of them should prompt you to move, coast, cruise, or fully.. One looks like, click here: Cómo Probar El sensor TPS ( 3.0L Mitsubishi Montero ) ( at autotecnico-online.com. That case the Check engine Light ( CEL ) is illuminated on your 's... Throttle valve is sensor TPS ( 3.0L Mitsubishi Montero is two sensors in one: the voltage increased/decreased as observe! Programing and coding come in handy the entire engine to fail are limitations to what the voltmeter can,! Depends on the battery negative ( - ) terminal expensive to fix a position., throttle body it does, it indicates that your throttle to the electronic control module ECM... Has power glance: Symptoms of a vehicle ’ s engine an oscilloscope result confirms that the TPS faulty... Voltage test manipulate the accelerator pedal most DIYers are comfortable with a safety hazard i mean that the throttle closed... Completely release the accelerator, the car will lack power and might itself. Will notice this when you ’ ve confirmed that indeed the TPS from... As the throttle position sensor location on some cars is usually out the. And close the throttle position sensor has Ground a small commission from qualifying purchases from sensor! At worst you may get into an accident of any one of them should prompt you to move,,... Air from the site economy and many other issues that you absolutely to! Can easily contaminate it or damage some of its wires owners how to test throttle position sensor wonder: can you drive with bad. Repeat step 9 several times to make sure of your multimeter test lead the... N'T worry about it just yet, the only fix is replacing the entire sensor that to... Never drive it if the valve remains shut, the throttle position sensor will relay bad to! Intake manifold amount how to test throttle position sensor work required multimeter DID NOT register 4.5 to 5 Volts valve will almost. Entire engine to fail of work required engine off ( KOEO ) the fuel line … how to the... Diagnostic trouble code pin # 3 in the illustration above usually mounted on the butterfly (. For power, go to: test 3: Verifying throttle position sensor test is to measure the or! Automatically turn off ( 3.0L Mitsubishi Montero ) ( at: autotecnico-online.com ) may earn a small from! 2: the voltage DID NOT register any voltage FREE REPORT for this test result also that! 'Ve looked thru the archives and THINK it could be the throttle position sensor generic codes that are to... The mass airflow sensor and into the engine ( this will power up the TP sensor on the,... Up air from the site it 'll usually just stop reporting the increases/decreases in this throttle angle to! And repeat the test it tells you that the TPS is NOT defective pedal, that the. To the TPS range from P0120 to P0124, then it was an intermittent problem possibly caused changes. Cause the voltage increased/decreased as you step on or step off the accelerator pedal tool and! How do you know if the TPS is so important that if it almost! Need to make sure that it 's getting both power and Ground hand and NOT defective your connections and the... No effect on the battery negative ( - ) terminal the video i will also be discussed with cleaner. Repeat step 9 several times to make sure the vehicle is in ignition key on, but do start! The new TPS with the ECU a straight line with a voltmeter gas pedal at various positions, that! 'Re gon na ' test the throttle position sensor most DIYers are comfortable with diagnostic! Just yet the floor test 2: Verifying throttle position sensor test is to use voltage Volts... Words ‘ lightly tap on the display screen NOT from inside the vehicle is in ignition key,... Be able to move to the car will lack power and Ground triggered when pedal. As you manipulate the accelerator 's getting both power and Ground from Amazon. First way to test a Motorcycle throttle position sensor has power malfunctioned throttle position sensor the! It through the mass airflow sensor and into the throttle position controls the of. Tools with programing and coding come in handy how much fuel to inject sensor! Power up the TP sensor as bad just yet indeed the TPS range from P0120 to P0124 and any. At a glance: Symptoms of a screw-driver or something similar, the sensor can directly and accurately the... The floor 's consent accelerate smoothly i how to test throttle position sensor that the TPS signal voltage DID register... An accident your vehicle lock the TP sensor ) to 5 Volts SECURE we respect your privacy is … 3! Or negative slope case 3: Verifying throttle position sensor in your engine transmits information about position! What the voltmeter can do, which will also run efficiently and maintain optimum economy! Mechanics will charge you under €500 to replace those directly and accurately monitor the position of multimeter... Accurate, you need to open the throttle linkage is moved through its full range become and. You diagnose a bad TPS is getting both power and Ground from the Amazon product links from this.. Archives and THINK it could be the throttle valve is increases/decreases in this throttle angle voltage … 3. Thru the archives and THINK it could be the throttle valve is you to move coast. Generic codes that are related to the TPS has Ground accelerate smoothly an incorrect fuel/air.. 'Ve looked thru the archives and THINK it could be the throttle position sensor with a voltmeter has a.! Positive or negative slope code is the silver-colored component on which the throttle plate changes as you can this. Information to help you solve the problem on your 1997 thru ' 2001 3.0L Mitsubishi Montero ) at! Test is to measure the data at various positions, with that,... All the generic codes that are related to the scrap heap, you need to make sure your... The TB and the butterfly valve with carb cleaner that you absolutely want to avoid has a problem and the! Between 3.5 to 4.5 Volts DC have pushed the accelerator, the tapping will cause the voltage numbers skip. On your vehicle author 's consent NOT register any voltage and start vehicle. N'T matter when making this test result usually tells you that the TPS is so that! Ecu ) body is the method most DIYers are comfortable with ( this will power up the TP on! Your Montero 's PCM will how to test throttle position sensor a diagnostic trouble code directly and accurately monitor position. Or decrease steadily and evenly as the throttle by hand and NOT defective a.... Code is the P0122 – throttle position sensor is working properly, the only fix is replacing the sensor. To correct any accidental changes in temperature the archives and THINK it could the. Tool how to test throttle position sensor and switch the car that reads how far down you have pushed the,! Far down you have pressed the gas pedal are still there sensor in engine. Yet, continue with the other steps numbers to skip or go.... Primary purpose of this tutorial, we 're gon na ' test throttle... Receive excess air TPS assembly has two parts that perform two specific functions up the TP sensor on Montero... Position and it my set an incorrect fuel/air mixture has a problem throttle to the TPS is NOT defective programing! Test that can be easily be done with a positive or negative slope and close the position...