how to test ecm motor with multimeter

After opening up the ECU board, If you see any broken components or corrosion, the ECU computer will need to be replaced. If available be sure to ask for a history of the car, such as known check engine light issues, idle speed issues or any issues that the previous vehicle had including past scheduled maintenance . Step 4 - Check starter motor current draw. However, for this process, you need some DIY skills. Using a scanner, you can find out your car engine code, which will show you ECM computer testing results. www.ecmweb.com is using a security service for protection against online attacks. How to Easily Test an ECM Motor Using the SUPCO TradeFox ECMPRO Universal Tester Sealed Unit Parts Co. 2.08K subscribers Subscribe 8.2K views 2 years ago Test any type of Electronically. Then test the motor terminals and wires. Test any type of Electronically Commutated Motor on the market with the technician-invented SUPCO TradeFox ECMPRO Universal Tester. Under the TradeFox brand, Supco helped bring their\r inventions to life through additional engineering and manufacturing. You can also test your car ECU at home and by yourself using on-board diagnostics 2 readers or a scanner. There is a short circuit to positive or an open circuit From the GE ECM Service Guide, https://www.linkedin.com/company/contracting-business-mag/, AHR 2023: The Importance of Training and Certification. For a good understanding, here is a simple guide. If the motor runs the problem is in the low voltage thermostat wire. When connected properly the voltage of the capacitors terminal should be 1.7 times the voltage of the power supply. A25408 "The Electronic steering lock has a malfunction. You can conduct a test with a multimeter using the following three steps. So, lets know the caution to test ECU with a multimeter. OBD scanner is used to check the car vehicle engine and communicate all the possible glitches in the vehicle. Verify that the correct thermostat input voltage is present at the interface of the main control board on the furnace or air handler. Be on the lookout for dirt, metal shavings, and oil. Every car owner should have an OBD code scanner in the vehicle. So, bring your multimeter and set-up for the circuit and ensure you use the circuit with the best range available multimeter gadgets. Observe the voltage reading on the multimeter. On 240VAC systems, the jumper should be removed. Bad ECMs may also display similar symptoms as other faulty components making it difficult to determine where the symptoms originate. One thing to always keep in mind, however, is to always consult the manufacturer's guide to confirm proper configurations and demands. If any of these is present, clean them out. Locating the Camshaft Sensor/Crankshaft Sensor Since there is almost always a factor that contributes to ECM failure, addressing the underlying cause is a priority. When you know how to test the ECU, you will be able to know what causes your ECU to go bad and you also be able to know common symptoms of a bad ECU. More about us. 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. If the motor fails Test 1, you might have to replace the wiring and the capacitors. That is why today we are going to look at how to test a motor with a multimeter. Make sure you do this by pulling on the metal connectorsNOT the wires. Unplugging and Cleaning the Sensor The first step entails removing the sensor from the engine block. 2023 Endeavor Business Media, LLC. Replacing an Engine Control Module (ECM) is simple, and you dont need to know too much about it. www.ecmweb.com is using a security service for protection against online attacks. Then, connect the red probe of Circuit Tester F to the white wire. Component pin outs. 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. So, its essential to have a multimeter in your car. Here is how to troubleshoot ECM HVAC blower motor.Tools That Can Make You Easy Money: https://www.dirtymaintenancenation.com/diy-tools-for-men/If you'd like . Wait for programmed delays to time out. *******************************************************************GET IN ON THE SUPCO TRADEFOX CONVERSATION:Instagram: @supco_hvacFacebook: http://bit.ly/SUPCOfbLinkedIN: http://bit.ly/SUPCOlinkedin If the motor does not run, remove the 16 pin plug from the IFC board. And not only for testing an engine control unit, there are various components you can test with a multimeter (aka Volt Ohm Meter). The service requires full JavaScript support in order to view this website. After you open up the car computer board, now you need to look for any broken components or corrosion in the ECU board. By elimination process, you will check almost all of the cars components, letting you know the current cars components situation. Link the red probe to the red wire. Another thing you should keep in mind is that when you set up the multimeter, use the current breakers with one of the leads to keep your multimeter safe and avoid any accidents. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. There are two types of multimeter: analog multimeter and digital multimeter. If this is the case, rev the motor up and down and observe the reading on . This is the process for Circuit Tester A. In input process elimination, The battery has a major role. You can test your VSS to make sure it's functioning properly by using a device called a multimeter. If all the connections are good, you will get a reading of 1.7 times the power supply reading. The price range of a multimeter is from $25 to $450. 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 . Continue with Recommended Cookies, Thinking of testing an ECU with multimeter? 4). Once more, this will differ based on the brand, model, and features of your vehicle. You need to disconnect the wires attached to the motor to remove it from the appliance. The same way that wear and tear on mechanics happens over a period of time, strain can also as efficiently as possible. If fault codes are present, consult the manufacturer's recommendations to resolve the problem. 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. Setting up your meter for a parasitic draw test. 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. Correct any voltage issues before proceeding. So, if you have proper knowledge about testing an ECM, program software, and tools, you can test your ECM at home without any difficulty. Diagnostic manual comes with: Wiring diagrams. This is followed up by ensuring that you put your multimeter on frequency mode. Onboard Diagnostic (OBD or OBD II) scanner manufacturers are constantly updating OBD II scanners for better performance. Connect the black multimeter probe to the negative battery terminal and the red probe to the positive battery terminal. Grab your digital multimeter and set it to DC volts. You will not need to spend hundreds of dollars in any auto shop to test the ECU computer; if you have a compatible multimeter, you can do it by yourself at home. (2). Plug the red test lead into the amperage or "A" jack. 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}. However, if you dont get such a reading, there might be an issue with your motor. This is mainly due to the fact that your engine computer is responsible for so many different areas within the engine compartment, many of which become affected when the engine computer begins malfunctioning. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Check the setting of the jumper pins or DIP switches on the manufacturer's control board. Also, check and clean the blower wheel, secondary heat exchanger, and evaporator coil. There are also a few checks you can perform if the ECM motor is not running. Using a multimeter set on the Ohm scale, use the positive lead and test the black wire. Module cost from these online stores are as little as $100.00 and even the rarest modules like cummins diesel control modules are sold at a fraction of the price when compared to the dealership. First, you have to test the fuse and relay with your multimeter. A swap is only effective for older cars. The cars Input contains the Ignition Switch, the Fuses, the Battery, and the Sensors. The second thing to do is start the smell test on your car computer; if your ECU computer smells more like burnt plastic, that means something is wrong, or its not alright. Look for loose plugs and/or loose pin connections in the plug, and for burnt, bent or loose pins or seats. The 3 wire speed sensor is externally powered, so you will need a power source of some form. First, make sure you unplug the electrical connection connected to it. Because OBD-I engine computers do not require programming upon installation, they will start and run your vehicle once installed. endobj The reason for this issue could be a bad motor, or it could be the bad components such as; bad relays, switches, cables, or the incorrect voltage. 1) Insulation resistance (IR). Always remember not to start your vehicle. Afterward, we can check the motors condition according to the two values. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. 07 grandprix has multiple codes that every time its cleared difference codes return but some are the same just would like to get the ecm tested and repaired if possible. Place the amp clamp around the positive battery cable with the arrow on the amp clamp facing towards the starter. And you will also get a PDF, where you will see the diagnosing process of a bad ECU with a multimeter.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,50],'caralso_com-medrectangle-3','ezslot_10',145,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-medrectangle-3-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,50],'caralso_com-medrectangle-3','ezslot_11',145,'0','1'])};__ez_fad_position('div-gpt-ad-caralso_com-medrectangle-3-0_1');.medrectangle-3-multi-145{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}. After factoring in the cost of the part itself, the cost of labor must also be considered. Whatever the reason, youve got yourself a faulty motor. 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. . B127A54 "Component compass module is not calibrated", EZS Electronic Ignition Lock I show you where the test voltage goes and how to. Firing orders. If you see ECM computers PINs are good and intact. Connect pins 1 and 3 to the common side of the 24 volt transformer (fig. Connect the black wire of the multimeter to the ground circuit and the red lead to the MAF sensor. Joined Jun 7, 2009. So you can rely on my recommendation. Make sure the power to the component; otherwise, you wont find circuit reading. Regular ECM tests will help your car to run properly on the road. If so, the following guide is for you. Some modern garages have the tools to swap the old ECU program to the new ECU, but you might not get these tools in a typical garage. If you test your car ECU with an On-Board Diagnostics II (OBD-II), you will get codes on the OBD-II scanner, and those codes notify the issues in your engine control module.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'caralso_com-leader-3','ezslot_17',154,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-leader-3-0'); Using a Volt Ohm Meter known as a multimeter, you will read the amps on the multimeter. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'caralso_com-leader-3','ezslot_14',115,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-leader-3-0');After you test all of these output units, you see output units are not getting the proper signal, which means your car computer is bad or not working correctly. <> Testing Tachometer With A Multimeter ( 4 Step Guide) Step 1: Setting up the Multimeter In this first step, switch on your multimeter. 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. Cookie Notice The motor should run. 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. So, you never know when you may have to test your motor. Here we are going to discuss all three motor tests. Tech Tip 1: Don't automatically assume the ECM motor has failed. Repair costs and labor at a dealership could be anywhere from $1,000 to $2,000 depending on the vehicle. 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 would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. ECM motors are dual voltage motors capable of operating in 120 or 240VAC systems. No matter what you do to your engine control unit (ECU), whether you reflash your car ECU or test the ECU with a multimeter, you have to conduct a visual inspection around the ECU computer. For this motor to operate, make . A Range of multimeter gadgets also will be required to test ECU. You can check your continuity with an ohm meter. In this HVACR Video, we go over the Troubleshooting of the ECM 3.0 Variable Speed Blower Motor and Testing with and without the TecMate Pro. Testing an ECU cannot be so hard if you have a multimeter in your hand. Usually, the car will regain power in around 45 minutes to an hour but has taken up to 3-4 hours before and seems dependent on the temperature before the power is restored and the car will start. On the other hand, if the motor does not pass the 2nd test, the problem is in the connector or the cable. The process for testing a car computer is not always as straight-forward as testing other modules within your vehicle and oftentimes may be difficult and time-consuming. Education: University Of Denver - Electric Engineering To do that, you have to connect Cs red probe to the black wire and Ds red probe to the red wire. This is the simplest of the tests. You should receive a reading of zero or nearly zero. 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. 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When you start visual inspection on your car computer, the first thing to see is PINs. There is a short circuit to positive e or an open circuit. I show you where the test voltage goes and how to check if the Fan Motor is good or bad. Try not to hurry when you open up the ECU board. If there is no resistance or the resistance is uneven, the motor is likely faulty. A high speed or heavy duty motor can see problems where the rotor conductors are crimped into the comm segments. (1). Loose or broken low-voltage wires can potentially cause intermittent problems. Performing a visual inspection is something that anyone can do right from home and is one of the first tests you should perform if a faulty ECM is suspected as ECM plays a very serious role in your vehicle. Thats why without an ECU, the car cannot be running. Don't try this at home.Supervision is needed by a licensed HVAC Tech while doing this as Experience and Apprenticeship garners Wisdom and Safety.If you want to support the ACSERVICETECH Channel and receive more HVAC content, check out www.Patreon.com/acservicetechWe've Partnered with TruTechTools.com! On most autos, the MAF sensor should read between 0.5 and 0.7 volts while the engine is idling. ), 3 Ways To Recondition A Car Battery That Wont Hold Charge. I was trained by parts changers that swap motor, modules, circuit boards til it works. As technology becomes more developed, companies becoming more reliant on electronics to control different aspects of the modern vehicle. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'caralso_com-large-mobile-banner-1','ezslot_9',110,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-large-mobile-banner-1-0');If you read less than 12.6 volts with the car engine off and 13.7 volts with the engine running, you should recharge the battery and re-test the voltage with a multimeter. With some DIY skills and proper execution, you can get the task done pretty easily. This has happened while driving but usually happens when the key is removed from the ignition. 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. A professional knows the proper way to test an ECM computer, and if you learn the process once, you should be able to test ECM by yourself at home. The primary purpose of the engine computer is to ensure that your vehicle is running smoothly and efficiently. Yvc,Nl{nNibb)4AZ:1H;. ]^g^uRn~G. %PDF-1.5 This motor may take a while to come to a complete stop with selected delays and the normal ramp down. 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. Oftentimes, a faulty ECM can be a result of a burnt circuit board due to poor wiring or other electrical mishaps. Search Millions of Parts from Thousands of Suppliers. 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. Use a multimeter or an ohmmeter to test the voltage of the electric motor. Whether you are driving a car or a truck, an ECU is essential for your vehicle. If there are any breaks on the checked circuit, the multimeters will start beeping. When you get a reading that is equal to 1.7 times the power supply, that means the motor is working properly. In any auto shop or many retail shops, you will get a multimeter easily. So, if you learn how to test a car computer in your car, you will be able to help others to do it and save their money. At this point the meter should be displaying a fairly constant AC voltage. ECM Motor Testing. To check the purple wire for current, use your ignition key and turn it to the run setting, turn the heater power to full power and set the multimeter to DC power. 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. I am a Car Mechanic and a student of Automobile Restoration here in Florida, USA. In the ohmmeter mode, connect the meter to the plug and monitor the resistance as you wiggle the cord where it enters the enclosure. You can also buy an ECM motor tester on Amazon to test the module (plug the applicable plug into the low voltage section of the module and clip the leads to 24v somewhere, then turn the tester on. ECM 3.0 is a communicating motor that consists of four (4) control wires connecting the board to the motor.