To test an ECM computer or car computer, you need to bring an Onboard Diagnostic (OBD or OBD II) scanner tool. A new ECU needs to be programmed into your vehicle because the ECU computer needs to be programmed for your cars model and make. So, it is always better to check the wires and connections, before jumping to any conclusions. I am a Car Mechanic and a student of Automobile Restoration here in Florida, USA. With those codes, you will be able to diagnose the ECM properly. How to Test a Single Phase Motor with a Multimeter (Guide), How to Test a Starter with a Multimeter (5-Step Guide), Can I Connect Red and Black Wires Together (Guide). When you get a reading that is equal to 1.7 times the power supply, that means the motor is working properly. When connected properly the voltage of the capacitors terminal should be 1.7 times the voltage of the power supply. OBD or OBD II Code Scanner OBD II Code Scanner As a car owner, you should know what an OBD code scanner is. Testing ECM computers would be really easy if you use OBD II for testing. 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. Follow the process of testing ECU step by step, and you will get the precise test result of your engine control unit computer. The multimeter is most commonly used for measuring the battery voltage and diagnosing faulty components and complex diagnostics. x[KOI#X=|J9#vfm@BckFdPQ=/Ywg?4_NFuJ)m First thing you need to do when you are testing an ECU with a multimeter that properly set up the multimeter. Whatever the reason, youve got yourself a faulty motor. If the motor hums but the belt doesn't move, the motor control board is the problem. *****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. You can conduct a test with a multimeter using the following three steps. Reconnecting a connector the wrong way could damage the motor. I hope you enjoy and find them very beneficial! 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. There are various ways to test an engine control module (ECM). Tech Tip 3: A True-RMS meter isn't needed to . When you start visual inspection on your car computer, the first thing to see is PINs. A compatible ECU will always help you to diagnose an ECU properly. Thats why you should learn the whole process of testing an ECM computer in your car. So, its essential to have a multimeter in your car. In addition to this, certain vehicles contain engine control modules that are very hard to find due to limited production which will also increase the price if a replacement is required. ECM 3.0 is a communicating motor that consists of four (4) control wires connecting the board to the motor. Mechanical problems such as faulty ball bearing can trouble the operation of your motor. 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. Most connectors are also keyed. Start the vehicle and wait for it to idle down to normal idle speed. Yvc,Nl{nNibb)4AZ:1H;. ]^g^uRn~G. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. An engine control unit (ECU) monitors most of the sensors in the engine bay to bring out the highest performance of your vehicles engine. Afterward, we can check the motors condition according to the two values. Once a diagnosis has been made and you have concluded the ECM is malfunctioning, your next step is to decide how to move forward; to decide whether your ECU ( Electronic Control unit needs to be repaired or replaced altogether. 2,128. 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. The service requires full cookie support in order to view this website. After factoring in the cost of the part itself, the cost of labor must also be considered. <>>> Education: University Of Denver - Electric Engineering When an Onboard Diagnostic (OBD or OBD II) scanner shows you codes, you need to understand those codes to fix issues in your car. (The one-min interval is an industry practice that allows everyone to take the reading at the same time. 3 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. For this motor to operate, make . When connecting the probes to the wires make sure to connect them properly. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Some tools and indications will help you to diagnose ECM computer.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'caralso_com-medrectangle-4','ezslot_4',103,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-medrectangle-4-0'); Scanner and visual inspection is the most common method to test ECM computer. 2023 Endeavor Business Media, LLC. 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. Of course, the increasing popularity of the ECM motor has led to a number of questions from technicians on how to service and troubleshoot ECM-driven systems. You should receive a reading of zero or nearly zero. 6106 No CAN message was received from control unit Combustion engine or transmission 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. Ignition System No-Start Diagnostic Manual $3.99 USD All of the information you need to diagnose a misfire or a no-start problem (caused by the ignition coil, the ignition module, or the crankshaft position sensor). For more information, please see our Check the bearings to make sure they can spin freely. So, you never know when you may have to test your motor. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. 3 0 obj Installing a new control on a failed motor will result in the new control also failing. Locating the Camshaft Sensor/Crankshaft Sensor On the other hand, Output contains the Spark Plugs, the Starter, and the Injector. Joined Jun 7, 2009. Here are the most common ECM failure symptoms: Testing a car ECM computer requires specialized knowledge, tools, and software. While other components may normally display clear-cut symptoms when faulty, symptoms within your engine computer may not be as obvious. A visual inspection will also help you to detect any external error in the ECU. Here are five useful ways to test ECM computer: OBD or OBD II code scanner Visual Inspection Car Battery Check A Swap Process of Elimination 1. You can check your continuity with an ohm meter. Crank the engine for several . Using alligator clip accessories on the test leads is often best for securing test leads in place. The first step in testing your ECU with a multimeter is to get the multimeter ready for the test. Privacy Policy. This is the process for Circuit Tester A. B126231 "A Magnetic interference field was detected" Thats why if you dont have enough knowledge or experience, you should leave the testing ECM to a professional.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'caralso_com-mobile-leaderboard-2','ezslot_19',128,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-mobile-leaderboard-2-0'); The average cost to replace ECM is around $1000 before taxes and fees; a new engine control module (ECM) costs you $700 to $900, and labor costs between $85 to $150. If you use the wrong control module, it will void all product warranties and may result in improper or no blower operation. If the motor fails Test 2, you might have to replace the connector and the cable. For instance, if you are using a 100V motor for this test, you will get a 170V reading on the multimeter. 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. For this motor test, we are going to use two multimeters; Circuit Tester A and Circuit Tester B. The process of elimination is done by checking the cars Inputs and Outputs. Testing an ECU cannot be so hard if you have a multimeter in your hand. By following these ways, you can test ECM computer. 2 0 obj Observe the voltage reading on the multimeter. When executing a continuity test, theres no need for power. 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. After reading this post, I could check my ECM (thank God my car just had bad spark plugs). Tech Tip 1: Don't automatically assume the ECM motor has failed. I thought testing and replacing the ECM computer was a hard work and demanded a professional mechanic (and wasted a lot of money, of course). The consent submitted will only be used for data processing originating from this website. Touch the two test leads to the two electrical connections. Connect both of the black probes to the black wire. 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. This kind of situation happens because of the excessive axial or radial load. Most of the time, its hard to notice the sign of ECM failure in a car. Using a Scanner and Process of Elimination. There is a short circuit to positive or an open circuit All rights reserved. Save my name, email, and website in this browser for the next time I comment. If you are thinking about how to test ECM computer, you come to the right place because today I will show you how to test ECM computer by yourself. In this case, you might have to replace the motor. For me, studying and getting knowledge about automobile its really fun and entertaining. B126322 "Control unit N10/1 front SAM control unit with fuse and relay module has received no LIN message from component Compas module Apart from the method above, there are two other different methods by which we can test an electric motor. Hey there,How is it going?Im Meraj Sarker. Please enable JavaScript on your browser and try again. First, remove the additional components such as capacitors and extension cables from the motors circuit. First, check for proper high-voltage and ground at the five-pin connector at the motor. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. First off is testing the 2 wire speed sensor. Reference voltage always goes to the car computer or Engine control unit (ECU) computer. Now set the multimeters to resistance mode. Check all terminal/plug connections both at the HVAC system control board, and at the motor. Repairing an ECM depends on the issues with your ECM. 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 . So, follow these steps. Lives In: Denver Colorado The gauges on the instrument cluster stay where they were when power is lost. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); What Are Some Examples of Motherboard Diagnostic Tools / Software / Utilities, 10 Proven Things To Put In Gas Tank To Ruin Car Engine, Top 10 Dead Car Battery Tricks Help You To Start A Dead Car, 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? If you remember, in the previous two tests, we set the multimeters to voltage mode. 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. While other components may normally display clear-cut symptoms when faulty, symptoms within your engine computer may not be as obvious. ECM Service Tech Tips. With the right guide, you can easily identify a faulty ECU with a multimeter. Now connect the red probe of Circuit Tester E to the red wire. 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}. The readings of the multimeters should be 170 ohms, given that is if, we use a 100V motor. 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. And you can test the car computer at home.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[728,90],'caralso_com-medrectangle-3','ezslot_5',145,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-medrectangle-3-0'); When an auto repair shop costs you high for engine control module testing, learning how to test your car computer will save you money and time. In the multimeter, there are variations such as digital multimeter and analog multimeter. Nowadays, the digital multimeter is way more popular because of its efficiency and accurateness. Check the diagram above and connect Circuit Tester C and D accordingly. On most autos, the MAF sensor should read between 0.5 and 0.7 volts while the engine is idling. Step 1: First, remove the gear head and the motor. And the vehicle temperature is determined by the computer. The ability to move air rapidly and efficiently in HVAC systems is essential to achieving a cost-efficient comfort system. Proper knowledge about your car ECM computer will help you to maintain your car properly. 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. Once more, this will differ based on the brand, model, and features of your vehicle. When checking low-voltage connections, always use the C terminal on the board, never on the ground. Replacing an Engine Control Module (ECM) is simple, and you dont need to know too much about it. Plug the probes from the multimeter into the two wires you identified coming out of the evaporator motor together, then turn the multimeter on and set it to resistance, or Ohms. In this test, we are going to measure the winding resistance of the motor. GE offers a few basic checks that technicians should perform before troubleshooting the ECM motor. Start by disconnecting and removing the VSS from your engine so you can test it. We come out with new videos every few days from my job sites, service calls, and the training shop! But, before you replace the ECU or ECM, you should know the proper procedure to replace the ECM computer in your car.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'caralso_com-narrow-sky-1','ezslot_20',129,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-narrow-sky-1-0'); If you unplug or disconnect the ECU, the vehicle wont run because an ECM is the brain of a vehicle. To do that, you have to connect Cs red probe to the black wire and Ds red probe to the red wire. The other way to test the motor is to lift one end of the motor assembly, put it on a surface with some vibration, and then move the belt. You better remember An ECM is one of the essential components to run the car. Pre-Programmed Engine Control Modules ECM. I reset and test my ECM after every new major install and so should you. Step 3: While rotating the shaft, if you can hear abnormal friction or a sound, it is a signal for misalignment or damage.