Due to the wide range of products sold at a massively discounted price, online stores that sell pre-programmed units is the best way to keep engine control module costs low. 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. If the motor does not run, remove the 16 pin plug from the IFC board. Knowing what a multimeter is and how it works is always helpful before knowing how to test ECU with a multimeter. Start the vehicle and wait for it to idle down to normal idle speed. You should apply the required settings for the multimeter before connecting it with the motor. 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. www.ecmweb.com is using a security service for protection against online attacks. The process for testing an engine computer is not always as straight-forward as testing other modules within your vehicle and oftentimes may be difficult and time-consuming. Make sure that there is no call for "continuous fan" on the G terminal. Visual Inspection of the Control Module ECM When inspecting your control modules on your vehicle it is important to be conscious of any physical defects you may come across such as frayed wires or corrosion without the need to visit an auto repair shop. Be on the lookout for dirt, metal shavings, and oil. 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. 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. 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. <>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> Reddit and its partners use cookies and similar technologies to provide you with a better experience. 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. You should also get an OBD-II scanner because this tool is so useful. And the vehicle temperature is determined by the computer. Programming and updates installed are also responsible for optimizing the engines performance. 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. There are other codes that I could go on with but hopefully, the ones provided are enough to determine if it's computer-related or not it appears that the issue only happens when it's extremely hot 100+ degrees outside and has not happened to me at night and did not happen once during colder temperatures and winter. B219400 THE POWER SUPPLY OF CIRCUIT 30 IS <7.5 V 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. The aim is to check the windings for open or shorts circuit. Flagship One Inc, is the world leader of engine control module repairs, programming and testing, feel free to contact us if you have any question or concerns. By following these ways, you can test ECM computer. If you read 12.6 volts with the car engine off and 13.7 volts with the engine on, this looks good, and your battery is fully charged. 4 0 obj The service requires full cookie support in order to view this website. The 3 wire speed sensor is externally powered, so you will need a power source of some form. B219500 "THE POWER SUPPLY OF CIRCUIT 30 IS < 8.5 V 2 0 obj Search Millions of Parts from Thousands of Suppliers. 1) Insulation resistance (IR). I think that I can handle this problem well on my own in the future. Use a multimeter to check the electrical resistance of the motor. You can conduct a test with a multimeter using the following three steps. A Range of multimeter gadgets also will be required to test ECU. In any auto shop or many retail shops, you will get a multimeter easily. So, follow these steps. (The one-min interval is an industry practice that allows everyone to take the reading at the same time. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Getting your ECM replaced or repaired at a mechanic or dealership is one of the more costly expenses and there are a few factors that determine that price; rarity of part, age of vehicle, and labor are among these main contributors. Put the multimeters positive lead to the battery ground post, and then you need to touch the multimeters positive lead fleetingly to the proper terminal of the modules harness connector. Here are the most common ECM failure symptoms: Testing a car ECM computer requires specialized knowledge, tools, and software. Test any type of Electronically Commutated Motor on the market with the technician-invented SUPCO TradeFox ECMPRO Universal Tester. When you start visual inspection on your car computer, the first thing to see is PINs. The reference voltage was not available in the past, but now its a very essential and familiar use in the car. Remove the filter and check that all of the dampers, registers, and grills are open and free-flowing. 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 There are various ways to test an engine control module (ECM). ECM Motor Testing . Some of our partners may process your data as a part of their legitimate business interest without asking for consent. The most important thing is to diagnose the main issues in your ECM computer because the problem is staying in your car would be bad for your vehicle. Wait for programmed delays to time out. 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 this is the case, rev the motor up and down and observe the reading on . 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. Connect 24 volts from R to pin 12 and pin 15. A PCM can be tested with a multimeter this process is used to measure the amount of current passing through to the PCM from the battery at a time. This motor may take a while to come to a complete stop with selected delays and the normal ramp down. An engine control unit (ECU), also known as the engine control module (ECM). Crank the engine for several . If you use a 100 VAC motor, you will get 100V reading on the multimeter. x[KOI#X=|J9#vfm@BckFdPQ=/Ywg?4_NFuJ)m For further visual inspection to test the ECU computer, you might need to open up the Engine Control Unit (ECU) board for further visual inspection. You should not avoid maintaining the safety procedure to test the engine control unit, and you need to read the caution carefully. While sending your ECM to a professional is the only sure-fire way to receive a guaranteed diagnosis, there are steps you can take in order to ensure you are making an informed and sensible decision to have your unit replaced. Please comment and ask for videos that you would like to see in the future! Certifications: B.E.E. Connect the OBD II scanner tool to the diagnostic port of your car, which will let you know whether or not there are any issues in your car by codes. 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.. Also, check and clean the blower wheel, secondary heat exchanger, and evaporator coil. 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. Set your multi-meter to the Rx1 setting. 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. On most autos, the MAF sensor should read between 0.5 and 0.7 volts while the engine is idling. First, remove the additional components such as capacitors and extension cables from the motors circuit. At this point the meter should be displaying a fairly constant AC voltage. After factoring in the cost of the part itself, the cost of labor must also be considered. If any of these is present, clean them out. This is the simplest of the tests. Take a look at some of our related articles below. But, when it comes to other motors, you will have to find out the designed values according to the model. 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 use the wrong control module, it will void all product warranties and may result in improper or no blower operation. For me, studying and getting knowledge about automobile its really fun and entertaining. In order to find a suitable replacement, you need to locate the part number on your original unit and find a replacement with a part number that matches. So, lets get started. X]@u;v\(}%VH?!}v}P'!pK\R+=Z;+&(xe d. The reference voltage is used for sensors and switches. Turn on the multimeter and set it to read voltage. 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. I am a Car Mechanic and a student of Automobile Restoration here in Florida, USA. 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. This will only be effective when working on an older vehicle. Step 1: First, remove the gear head and the motor. There are also a few checks you can perform if the ECM motor is not running. Nowadays, the digital multimeter is way more popular because of its efficiency and accurateness. Connect the black multimeter probe to the negative battery terminal and the red probe to the positive battery terminal. Turn the ignition key to the on position. When it comes to determining if your 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 is processing the data and not an issue with the sensors sending the data or an issue with the actuators receiving the data. 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. Whether you are getting a trouble code, your fuel economy is declining, your vehicle stall or misfire , a check engine light or non existent engine performance you should always think the ECM could be the culprit and you do not really need an auto repair shop to do the basic steps. More about us. Also, using a multimeter is very easy and simple. If removing the filter corrects the problem, clean or replace with a less restrictive filter. So, lets know the caution to test ECU with a multimeter. 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. How Much Does it Cost to Replace Your Engine Control Module? When you start testing the ECU with multimeter you will need to test every component on it. % How do you test a blower motor with a multimeter? So you can rely on my recommendation. So, its essential to have a multimeter in your car. If you find any corrosion or burnt components on your unit then a replacement is required and further diagnosis will need to be done to determine the cause of the burnt unit or corrosion. 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}. 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 . Personally, I always test my cars ECU computer using this OBD II scanner because its an easy and precise method to do it. 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. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. For instance, if you are using a 100V motor for this test, you will get a 170V reading on the multimeter. " 3XZV\BU](x_li9C\IcM>4)hq%|\66d@[cc{95W j4/4Ih 7lmuakk$5:'oz3Fl_{@'ri@X0plsl1|F4'9k;YlJn7B]KOl3iK"c>c"(t=wU6qb>k\)\a2W GKG+~I$}5m:\gM+^b)v}D~24`}-EJR,zEj+oH=Hz/,JW! But not here. Check the bearings to make sure they can spin freely. When connected properly the voltage of the capacitors terminal should be 1.7 times the voltage of the power supply. 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.