how to test ecm motor with multimeter

The best way for a deduction to be made is by making sure that all the sensors and actuators are functioning properly; we need to ensure that the sensors are supplying the correct amount of power to the ECM and that all components are able to receive the correct signals that the computer provides. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,50],'caralso_com-box-3','ezslot_8',138,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-box-3-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,50],'caralso_com-box-3','ezslot_9',138,'0','1'])};__ez_fad_position('div-gpt-ad-caralso_com-box-3-0_1');.box-3-multi-138{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:50px;padding:0;text-align:center!important}To test ECU with a multimeter, you have to have a compatible and working multimeter. And an ECM computer is an expensive part of your car. For this motor test, we are going to use two multimeters; Circuit Tester A and Circuit Tester B. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. And after you put the replacement unit in your vehicle and communicate, that is a certain indication that tells your cars unit that it needs to be replaced. Every car owner should have an OBD code scanner in the vehicle. Please enable cookies on your browser and try again. In most cases, the units are sent completely plug and play so that your vehicle will even start upon installation. If there is a problem with the engine computer then it will not process the data correctly and it will affect the way the outputs function. Plug the red test lead into the amperage or "A" jack. The multimeter is also known as a volt-ohm meter. The process of elimination is done by checking the cars Inputs and Outputs. Most of the time, its hard to notice the sign of ECM failure in a car. To address these two concerns efficiency and noise the electronically commutated motor (ECM) was developed. By following these ways, you can test ECM computer. I show you where the test voltage goes and how to check if the Fan Motor is good or bad. The gauges on the instrument cluster stay where they were when power is lost. If you see ECM computers PINs are good and intact. 4 0 obj So, it is always better to check the wires and connections, before jumping to any conclusions. At this point the meter should be displaying a fairly constant AC voltage. The multimeter should be in AC voltage mode. If it's higher than the manufacturer's recommendations, then correct the airflow restriction.If the motor does not shut off at the end of the cycle, check the delay times and wait for delays to time out. As a result it may sound like a dealership is unavoidable, however, there are companies that specialize in the procurement and programming of engine computers. After you tested the ECU with your multimeter, now it is time for you to read the record of what you get from the ECU computer. So, you never know when you may have to test your motor. A multimeter loads the circuit under test to some extent, with full-scale deflection of 50 microamps (amps) or "ohms per volt." Here are four simple steps you need to consider while diagnosing the ECU system of your car: Get your multimeter and set it up to test for the circuit using the best range available multimeter gadgets. Use a multimeter or an ohmmeter to test the voltage of the electric motor. For the example above, we used a 100V motor. The following process of testing ECU with a multimeter is one way you can run a test. Sometimes, these readings can be smaller than 170 ohms like when there is an internal short circuit, the readings can be smaller than 170 ohms. Move the switch from side to side and, with a trigger switch taped so it remains on, press on the brushes and turn the commutator by hand. Using a scanner, you can find out your car engine code, which will show you ECM computer testing results. Remove the filter and check that all of the dampers, registers, and grills are open and free-flowing. The reference voltage is used for sensors and switches. You might have to test for these kinds of issues too. Look for loose plugs and/or loose pin connections in the plug, and for burnt, bent or loose pins or seats. You can now start the engine and let it idle. Im not only an electrician, but I also like machinery and anything to do with carpentry. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); The world's top supplier of programmed OEM (Original Equipment Manufacturer) Powertrain Control Modules (PCM), Engine Control Modules (ECM), Injection Control Modules (IDM), Body Control Modules (BCM), Transmission Control Modules (TCM), Engine Control Units and all other car control units. Personally, I always test my cars ECU computer using this OBD II scanner because its an easy and precise method to do it. There are various ways you can test the engine control unit with a volt-ohm meter.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'caralso_com-large-mobile-banner-1','ezslot_12',153,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-large-mobile-banner-1-0'); There are cautions for you when you test your engine control unit with a multimeter, and you should know them properly, whether you test or replace your car ECU. Here are five useful ways to test ECM computer: As a car owner, you should know what an OBD code scanner is. Remember that ECM motors have high voltage going to them at all times and are turned on and off by low voltage commands), the testers are listed below: In addition to being time-consuming, replacing your bad ECMs can be costly so it is important to be sure your vehicles problem truly lies within the ECM. *******************************************************************GET IN ON THE SUPCO TRADEFOX CONVERSATION:Instagram: @supco_hvacFacebook: http://bit.ly/SUPCOfbLinkedIN: http://bit.ly/SUPCOlinkedin One thing that I do know for certain is that Fuse Box A2049006709 has been replaced at one point It does this by analyzing the data it receives from individual sensors and transmitting that data to a variety of actuators that will adjust the way they perform based on the communicated information. More about us. ECM Service Tech Tips. On most autos, the MAF sensor should read between 0.5 and 0.7 volts while the engine is idling. This motor may take a while to come to a complete stop with selected delays and the normal ramp down. Step 4 - Check starter motor current draw. B219400 THE POWER SUPPLY OF CIRCUIT 30 IS <7.5 V Remember that the change in airflow between continuous-fan speed and low stages of operation may be very slight depending on the size of the system. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. A new ECU needs to be programmed into your vehicle because the ECU computer needs to be programmed for your cars model and make. On 240VAC systems, the jumper should be removed. Test any type of Electronically Commutated Motor on the market with the technician-invented SUPCO TradeFox ECMPRO Universal Tester. Components that used to be controlled manually are now controlled by sophisticated computers. ECM Motor Testing . If you remember, in the previous two tests, we set the multimeters to voltage mode. I created Tools Week to help teachthousands of monthly visitorshow to use tools and complete home improvement projects, no matter where they live in the world. Using a multimeter set on the Ohm scale, use the positive lead and test the black wire. Turn the ignition key to the on position. I am a Car Mechanic and a student of Automobile Restoration here in Florida, USA. First, make sure you unplug the electrical connection connected to it. Connector pin outs. Proper knowledge about your car ECM computer will help you to maintain your car properly. In addition to being time-consuming, replacing your ECM can be costly so it is important to be sure your vehicles problem truly lies within the ECM. Follow the process of testing ECU step by step, and you will get the precise test result of your engine control unit computer. For brushes/commutator, your best check is visual. This is the process for Circuit Tester A. There is a short circuit to positive e or an open circuit. You should also get an OBD-II scanner because this tool is so useful. Lives In: Denver Colorado In the ohmmeter mode, connect the meter to the plug and monitor the resistance as you wiggle the cord where it enters the enclosure. Connect 24 volts from R to pin 12 and pin 15. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. If you use a 100 VAC motor, you will get 100V reading on the multimeter. A good and properly charged battery should read at least 12.6 volts with the engine off, or 13.7 volts with the engine running. A faulty ECM may also display similar symptoms as other faulty components making it difficult to determine where the symptoms originate. An engine control unit (ECU), also known as the engine control module (ECM). ********************************************** SUPCO TradeFox - Technician Invented. Electrical engineering is my passion, and Ive been in the industry for over 20 years. If the motor hums but the belt doesn't move, the motor control board is the problem. Connect both of the black probes to the black wire. Whenever your vehicles check engine light comes on there will be fault codes attached to it that will indicate to the driver what the possible issue might be. See you next time at ACSERVICETECH Channel!Check out All of the ACSERVICETECH Playlists- https://www.youtube.com/channel/UCOZR-1IqsAer9wzlvFgb4mA/playlists?view_as=publicACSERVICETECH is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.You can enter Amazon through this http://amzn.to/2aenwTqHere is the Link for the TecMate Pro- http://amzn.to/2jIP0tyHere is the Link for the newer UEI DL469 Multimeter- http://amzn.to/2jw4ePJHere is a link for the Supco Magnet Jumpers http://amzn.to/2gS4h6zHere is the Link for the newer UEI DL479 Multimeter with temp sensor- http://amzn.to/2jtsUbJHere is the link to the 2 pairs of alligator clips- http://amzn.to/2CtIL5zHere is a link to the JB 6 CFM Vacuum Pump http://amzn.to/2nqbvo8Here is the Link to the Appion Blue 3/8\" to 1/4\" Vacuum Hose- http://amzn.to/2uYlVycHere is the Link to the Appion Red 3/8\" to 1/4\" Vacuum Hose- http://amzn.to/2uYg6RoHere is the link to the Appion Valve Core Removal Tool- http://amzn.to/2uYr8WLHere is the link to the Yellow Jacket 1/4\" by 1/4\" heavy duty hose straight- http://amzn.to/2umtcodHere is the link to the CPS Vacuum Micron Gauge- http://amzn.to/2v1nM3OHere is the link to the Supco Vacuum Micron Gauge- http://amzn.to/2v1JRiAHere is a link for RectorSeal Bubble Gas Leak Detector http://amzn.to/2ckWACnHere is a link to the UEI DL389 Multimeter used in the videos- http://amzn.to/2xAdaJfHere is the link to the Fieldpiece ST4 Dual Temp Meter- http://amzn.to/2wc1ME3Here is a link to the Air Acetylene Torch setup- http://amzn.to/2aQalsb Here is a link to the 15% Silver Brazing Rods- http://amzn.to/2gVLyLcHere is a link the Nitrogen Regulator http://amzn.to/2bXdR5fHere is a link to the Nitrogen Flow Meter http://amzn.to/2brvoBgHere is a link to the Digital Refrigerant Scale used in the videohttp://amzn.to/2b9oXYl Here is the Link for the Yellow Jacket Refrigerant Manifold Gauge Set used in the videos http://amzn.to/2aenwTqHere is a link to Refrigerant hoses with valves used in the videos http://amzn.to/2aBumVIHere is the link for the Imperial Kwik Charge 535-C- http://amzn.to/2uipEI6 Here is the link to the Fieldpiece SDMN6 Dual Pressure Testing Manometer with Pump-http://amzn.to/2jyK5KaHere is a link for the Supco Magnet Jumpers http://amzn.to/2gS4h6zHere is a link to 1 gallon of JB Vacuum Pump Oil http://amzn.to/2mGrlXyHere is a link to the General Tools digital Psychrometer http://amzn.to/2cSHsi1Here is a link to the Fieldpiece SDP2 Digital Psychrometer- http://amzn.to/2nniMVRHere is the link for the Ratcheting Service Wrench http://amzn.to/2dGV4NhHere is a link to the Appion G5 Twin Recovery Pump http://amzn.to/2dGSEyr Here is a link to the Malco Sheet metal scribe- http://amzn.to/2qCwu9DHere is a link to the Malco 90 Degree Right Hand Vertical Snips- http://amzn.to/2qHHpu4Here is a link to the Malco 90 Degree Left Hand Vertical Snips- http://amzn.to/2qHF564Here is the link for the Malco 3\" Blade Combination Snips- http://amzn.to/2dz7EjcHere is the link for the Irwin Wire Stripper/Cutter/Crimper http://amzn.to/2dGTj2VThank You, ACSERVICETECH Try and find it on the internet or ask the manufacturer. Onboard Diagnostic (OBD) is an engine code scanner that can access vehicle data. OBD II readers are widely popular worldwide, and almost every car owner has them in their car. You should first take out the ECM to make sure the pins are in an upright position and check inside the plug and casing to make sure there is no corrosion for all wire connection . The price range of a multimeter is from $25 to $450. Grab your digital multimeter and set it to DC volts. If you need any help let me know. According to GE, an innovator in ECM technology, the wide range of the ECM motor, high efficiency, and programmability gives it a virtually unlimited range of performance characteristics. You can replace an ECM by yourself. If you need any help let me know. Also, since the motors run on high speed all the time, the noise levels are also high. This has happened while driving but usually happens when the key is removed from the ignition. How do you test a blower motor with a multimeter? Tech Tip 3: A True-RMS meter isn't needed to . In any auto shop or many retail shops, you will get a multimeter easily. It is not intended to be technical advice and should not be treated as such, since situations, conditions, experience and skills are unique and vary widely. You also need to make sure that the circuit board is not fried, most ECU repairs shop charges a lot for their services while at Flagship One Inc, We guaranteed you the cheapest of prices, be sure to call us for a quote. If you are testing the ECM computer and found the main culprit, then its better to go to an auto repair shop or a professional to take proper steps about your car computer. When connecting the probes to the wires make sure to connect them properly. A25464 "The Electric steering lock has a malfunction. There is a short circuit to positive or an open circuit The 3 wire speed sensor is externally powered, so you will need a power source of some form. All rights reserved. Certifications: B.E.E. With those codes, you will be able to diagnose the ECM properly. 2023 Endeavor Business Media, LLC. Multimeters make simple everyday testing so easy.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'caralso_com-box-4','ezslot_3',147,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-box-4-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'caralso_com-box-4','ezslot_4',147,'0','1'])};__ez_fad_position('div-gpt-ad-caralso_com-box-4-0_1');.box-4-multi-147{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:250px;padding:0;text-align:center!important}. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'caralso_com-box-3','ezslot_6',138,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-box-3-0');You better remember, ECM Computer, car computer, Engine control module computer are the same, people say what they are accustomed to. Here we are going to discuss all three motor tests. The current reading on the multimeter should not be more than 1.2 amps because if the amps are more than that, that tells you there is anything wrong with the car computer. An example of data being processed may be a unique identifier stored in a cookie. Apart from the method above, there are two other different methods by which we can test an electric motor. OBD or OBD II Code Scanner OBD II Code Scanner As a car owner, you should know what an OBD code scanner is. An engine control unit (ECU) monitors most of the sensors in the engine bay to bring out the highest performance of your vehicles engine. It does this by analyzing the data it receives from individual sensors and transmitting that data to a variety of actuators that will adjust the way they perform based on the communicated information. Connect the negative Meter lead to a good chassis ground in the vehicle and the positive lead to the suspected tachometer wire. The multimeter is most commonly used for measuring the battery voltage and diagnosing faulty components and complex diagnostics. Connect the black multimeter probe to the negative battery terminal and the red probe to the positive battery terminal. When you start visual inspection on your car computer, the first thing to see is PINs. Tech Tip 1: Don't automatically assume the ECM motor has failed. Step 2: Then, turn the shaft clockwise and counterclockwise. Save my name, email, and website in this browser for the next time I comment. And if you dont know much about ECM computer or have no experience, you should first need to learn the ECM testing procedure from a professional or an experienced person. Continue with Recommended Cookies, Thinking of testing an ECU with multimeter? B162A15 The Left low Beam has had a malfunction. If these checks don't resolve the problem, or if the fault code reveals a motor problem, then it's time for some additional diagnostics. (1). First, turn the power off. If the motor does not run, remove the 16 pin plug from the IFC board. GE offers a few basic checks that technicians should perform before troubleshooting the ECM motor. If you are experiencing problems like loss in fuel economy and engine performance then you may only need to have your unit reprogrammed. If this is the case, rev the motor up and down and observe the reading on . Tech Tip 3: A True-RMS meter isn't needed to check high-or low-voltage to the motor. If the issues do not return after test driving the vehicle then that is a good indicator that there was an issue with your original unit. The tools needed for testing either a 2 or 3 wire speed sensor are essentially a multimeter with the clamp leads, and a drill. The problem with these types of motors is that they use a lot of energy because they run at full amp draw at all times even during off-demand cycles. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. However, for this process, you need some DIY skills. If all the connections are good, you will get a reading of 1.7 times the power supply reading. Tech Tip 2: When it's necessary to disconnect the power from the HVAC system, it's always a good practice to verify that voltage has been disconnected, by using a voltmeter. After testing the fuse and relay, you will need to perform the amperage draw. Afterward, compare the two values. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); What Is An Engine Control Unit And How Does It Work, Multimeters make simple everyday testing so easy, How To Properly Ground A Car Battery | Ground Automobile Electrical system, How To Jump Start A Dead Battery Without Another Car (Fast), Causes Manual and Automatic Transmission Will Not Engage in Any Gear, 8 Things That Can Drain A Car Battery When The Car Is Off, Car Battery Dead Will It Recharge By Itself? We and our partners use cookies to Store and/or access information on a device. C427 Implausible Data was received from the electronic ignition switch, ESP Electronic Stability Program Make sure the circuit is connected with a harness when you test the engine control module because if the harness is disconnected, you wont get any results. Some of the common codes may be shown in your OBD II scanner: In order to test an ECM computer, you have to do a visual inspection around the ECM computer. *****TECHS**** Find your nearest SUPCO distributor here: http://bit.ly/2ZB0cd8Learn more: https://www.supco.com/web/supco_live/products/ECMPRO.htmlThis product update video contains general technical information provided for educational use only. The best way to check a treadmill's motor is to use the treadmill itself. This is the process for Circuit Tester A. When it comes to determining if your control modules ECM is faulty, the goal is to make sure that there is an issue within the computer itself- that there is an issue with how the ECM ( Engine control modules ) is processing the data and not an issue with the sensors sending the data or an issue with the actuators receiving the data. For every version of ECM computer resetting and testing processes are the same. How to Replace a PCM ECM ECU Module (Engine Computer) on 2005-2006 Ford Escape / Mercury Mariner / Mazda Tribute, Car Engine Computers No Longer the Brains, How to Replace a PCM ECM ECU (Engine Computer) on a 2001 Dodge RAM Truck Pick-up, How to Buy the Right Replacement Module for Your Chrysler PCM, The P0138 Trouble Code and How To Deal With It, 1999 Ford Truck (F-Series) 7.3L F81F-12A650-BF PCM ECM ECU Control Module (Engine Computer) Replacement, How to Choose the Best PCM for Your Ford Vehicle, 5 common Problems With Cars and How to Check Them, 2004 Jeep Liberty Problems To Keep In Mind. If removing the filter corrects the problem, clean or replace with a less restrictive filter. For instance, if the motor does not pass the 1st test, the problem is in the wiring or the capacitors. Education: University Of Denver - Electric Engineering B219500 "THE POWER SUPPLY OF CIRCUIT 30 IS < 8.5 V With the right guide, you can easily identify a faulty ECU with a multimeter. A Range of multimeter gadgets also will be required to test ECU. Tech Tip 4: If you must replace the 2.0, 2.3, or 2.5 control module, then be sure to use a direct replacement from the manufacturer. References(1) diagram https://www.computerhope.com/jargon/d/diagram.htm(2) internet https://www.livescience.com/20727-internet-history.html. Privacy Policy. Thats why you should learn the whole process of testing an ECM computer in your car. % Step 1 - Check the Power Supply Voltage with Circuit Tester A Just like in the diagram shown above, first, connect the red probe of the multimeter to the red wire; connect the black probe to the black wire. Now you need to turn the key on and see the driver supply; if the driver supplies power, then move the meters negative lead over to the positive battery post precisely. Reminder: there is something that is a total failure in the ECU, and even the ECU itself can be a total failure when you test with a multimeter. Now you need to see if the output units are working properly or not.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'caralso_com-leader-4','ezslot_15',125,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-leader-4-0'); Ensure the Injector, the Starter, and the Spark Plugs get the right signal from the ECM computer. People get confused to understand the difference between ECU and ECM or PCM or TCM, which is not really hard to understand.