An engine control unit (ECU), also known as the engine control module (ECM). 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. A faulty motor can cause a lot of trouble. Also, since the motors run on high speed all the time, the noise levels are also high. The reference voltage was not available in the past, but now its a very essential and familiar use in the car. The consent submitted will only be used for data processing originating from this website. Be on the lookout for dirt, metal shavings, and oil. Regular ECM tests will help your car to run properly on the road. Harley Davidson Softail: Electrical Diagnostic Guide | Hdforums 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? Because OBD-I engine computers do not require programming upon installation, they will start and run your vehicle once installed. But not here. How to Check an Electric Motor: Testing & Troubleshooting - wikiHow One thing to always keep in mind, however, is to always consult the manufacturer's guide to confirm proper configurations and demands. 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. The price of a multimeter depends on quality and precision. You will be redirected once the validation is complete. Duct System Assumptions to Duck on Equipment Changeouts, Photo 79574657 Tashatuvango | Dreamstime.com. 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. With the right guide, you can easily identify a faulty ECU with a multimeter. Look for loose plugs and/or loose pin connections in the plug, and for burnt, bent or loose pins or seats. 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. Once more, this will differ based on the brand, model, and features of your vehicle. Make sure you do this by pulling on the metal connectorsNOT the wires. PLxnHR5_D2ojyDrxCT9MIttGW4wxOZ3nRefrigerants, Fuel Gases, Electricity, and other hazards are present when working on HVACR systems. (2). Observe the voltage reading on the multimeter. 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. ECM motors are dual voltage motors capable of operating in 120 or 240VAC systems. Components that used to be controlled manually are now controlled by sophisticated computers. When you get a reading that is equal to 1.7 times the power supply, that means the motor is working properly. A faulty engine control unit can bring various issues to your car, such as sudden shut-off, car wont start, and poor engine performance. Now, connect the remaining two black probes of the C and D to the end of the extension cable. However, if the system is excessively noisy, doesn't appear to change speeds in response to a demand for heat or cooling, or is having symptoms during the cycle such as a tripping limit or freezing coil, there are a number of checks that can be performed. PDF ECM Blower Motor Quick Test - Shearer Supply All rights reserved. The aim is to check the windings for open or shorts circuit. With an Onboard Diagnostic (OBD) scanner, testing a car computer is so easy. ECM Blower Motor Quick Test Fig. You can now start the engine and let it idle. endobj These are the components that will need to be checked to test a car computer. The price range of a multimeter is from $25 to $450. So, you never know when you may have to test your motor. h6 hHvih8;zbLE|\0&tN]%3y MYa}l*ahs,7[J;S-,- :W^=?.b{O>[.B{p;-Unv|@{%uWrvN 7#.7xg73F$=wa8+vr4oG9XP2;}^. Cookie Notice 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. www.ecmweb.com is using a security service for protection against online attacks. Step 1: First, remove the gear head and the motor. endobj These three methods are the best solutions for electric motor testing. When checking low-voltage connections, always use the C terminal on the board, never on the ground. Then, we will compare it to the originally designed values of the motor winding. On older vehicles, typically models 1995 and older, switching your ECM for another unit is a sufficient mode of testing. Joined Jun 7, 2009. ECM Motor Testing | Baker Distributing | Baker Distributing Anything goes wrong with the ECM computer during the test; it would need to replace. The same way that wear and tear on mechanics happens over a period of time, strain can also as efficiently as possible. ), 3 Ways To Recondition A Car Battery That Wont Hold Charge. 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. Now check the voltage of the multimeter. One thing that I do know for certain is that Fuse Box A2049006709 has been replaced at one point 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. From the GE ECM Service Guide, https://www.linkedin.com/company/contracting-business-mag/, AHR 2023: The Importance of Training and Certification. Hey there,How is it going?Im Meraj Sarker. An example of data being processed may be a unique identifier stored in a cookie. Onboard Diagnostic (OBD) is an engine code scanner that can access vehicle data. 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. Check your car battery voltage using a multimeter with the engine off and engine on. 6106 No CAN message was received from control unit Combustion engine or transmission Check the bearings to make sure they can spin freely. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. If you follow these steps correctly, then you should get the voltage of the power supply. 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}. ECM 2.3 has a 16-pin control wiring harness running from the board to the motor. 4). Remember, this car computer testing process is only for old cars containing OBD I, not modern cars.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'caralso_com-leader-2','ezslot_13',123,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-leader-2-0'); To diagnose the car computer, the process of elimination is a very useful way. 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. This is the process for Circuit Tester A. 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 . All rights reserved. One of the most important functions of an ECM is its ability to alert the driver when there is an issue with the vehicle. Correct any voltage issues before proceeding. If you use the wrong control module, it will void all product warranties and may result in improper or no blower operation. 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. Please enable cookies on your browser and try again. Set the meter function to the amps AC or DC setting as appropriate. Most of the time, its hard to notice the sign of ECM failure in a car. %PDF-1.5 When you plug the OBD-II reader into your car engine control unit computer, you will get a bunch of codes that you will need to fix if there is any error code. If you use a 100 VAC motor, you will get 100V reading on the multimeter. 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. 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. The primary purpose of the engine computer is to ensure that your vehicle is running smoothly and efficiently. For this test you'll need an amp clamp. How to Easily Test an ECM Motor Using the SUPCO TradeFox - YouTube That is why today we are going to look at how to test a motor with a multimeter. For instance, if the motor does not pass the 1st test, the problem is in the wiring or the capacitors. Also, check and clean the blower wheel, secondary heat exchanger, and evaporator coil. GE offers a few basic checks that technicians should perform before troubleshooting the ECM motor. Manage Settings . Any type of faulty wires or connectors can be the reason for a bad motor. An engine control unit (ECU) monitors most of the sensors in the engine bay to bring out the highest performance of your vehicles engine. 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. I show you where the test voltage goes and how to. 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. So, if you have proper knowledge about testing an ECM, program software, and tools, you can test your ECM at home without any difficulty. Verify that the correct thermostat input voltage is present at the interface of the main control board on the furnace or air handler. 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. The tools needed for testing either a 2 or 3 wire speed sensor are essentially a multimeter with the clamp leads, and a drill. 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. If removing the filter corrects the problem, clean or replace with a less restrictive filter. Understanding Insulation Resistance Testing | EC&M If you follow these steps correctly, you can identify the condition of any motor. So if you are driving an old car made before 1996, then with a simple swap, you can test the car ECM computer.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'caralso_com-large-mobile-banner-2','ezslot_12',122,'0','0'])};__ez_fad_position('div-gpt-ad-caralso_com-large-mobile-banner-2-0'); To swap to your car, first, you need to find a replacement unit that matches the original part number. U050500 Implausible Data were received from control unit right front door, FSCU Control unit fuel pump 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. U015500 Communication with the instrument cluster has a malfunction To do that, you have to connect Cs red probe to the black wire and Ds red probe to the red wire. It should be between 12 and 16 volts. Apart from the method above, there are two other different methods by which we can test an electric motor. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules. 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. For instance, if you are using a 100V motor for this test, you will get a 170V reading on the multimeter. An example of data being processed may be a unique identifier stored in a cookie. How To Test The GM Ignition Control Module (1995-2005) 4 0 obj Onboard Diagnostic (OBD) is an engine code scanner that can access vehicle data. If you remember, in the previous two tests, we set the multimeters to voltage mode. ECM 3.0 is a communicating motor that consists of four (4) control wires connecting the board to the motor. Make sure that there is no call for "continuous fan" on the G terminal. On the other hand, if the motor does not pass the 2nd test, the problem is in the connector or the cable. Turn on the multimeter and set it to read voltage. 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. This guide will show you how to test ECM with a multimeter easily and quickly. 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.