My car would continue to have power running but not the engine. ECU or electric control unit is a chip with software installed with default settings for the car’s functions. In the Automotive industry, the term ECU often refers to an Engine Control Unit (ECU), or an Engine Control Module (ECM). This means that you don’t have to go to the mechanic’s workshop every time you see a check engine light. ECU or Engine Control Unit is an electronic controller that looks after the actuators and tells about the efficiency of the engine. Sometimes you can learn something about the complexity of ECUs just by the way your car behaves. Manufacturers do this to lengthen the life of a car, by adapting the software to climates, terrains and fuel qualities of a specific country. Phone: 07 3348 3822 – Email: sales@couplemate.com.au. Start your car and go for a test drive to check. Where is the engine control unit located? The ECU is an important component in modern cars, because without it the car cannot function. Modern car and van engines have an electronic management system that controls fuelling. Asked by noeb in Natchitoches, LA on . Airbag Control Unit Replacement Cost & Location, P0445 Code: Evaporative Emission Control System -…, ABS Control Module Symptoms, Function & Replacement Cost, Idle Control Valve Symptoms, Function & Replacement Cost, Control Arm Bushing Symptoms, Location & Replacement Cost, Faulty Internal Parts inside engine control unit (ECU), Refer to the service manual to check and locate the engine control unit. This is the only way to ensure that you get the best in both driving as well as … The new software is flashed to the ECU chip, also called a PROM or Programmable Read Only Memory chip, using a cable attached to the assembly line diagnostics link system. Ecu definition, a former money of account of the European Common Market that was used in international finance until the euro was adopted and was based on the combined prorated values of … Automatic transmissions and even dual clutch manual transmissions are coming with TCM modules installed, whereas the traditional manual gearbox does not. The ECU is essentially a computer in your car that controls the power of your engine. However, if you choose to repair it yourself, you may face a lot of hassle, and you will need special tools and knowledge to repair the circuitry and electronic components of the engine control unit. My car emmits a black smoke from the exhaust. The ECU of your car is like its brain. ECU remapping, engine chipping, and chip tuning all mean the same thing. The replacement process is very simple compared to the repair. The ECU, or engine control unit, is a major component of your car's onboard computer. ECU - Engine Control Unit EEC - Electronic Engine Control. Commonly, PCM, ECM, and ECU refer to the same subject – an Engine Computer. If something has gone wrong with the Control Unit, the problem may be an electrical wiring one. Remove the bolts if any and carefully take it out. Hi, my Lexus car emmits a black smoke from the exhaust and the fuel consumption is very high. Observe if your engine is stalling or misfiring, See if the performance of the engine is affected, The ECU may have failed if you cannot start your car. For your car to deliver it’s best performance you have to keep it in a fit condition at all times. Manufacturer's often under-run car engines to help increase their lifespan and fuel economy. This guide explains exactly what is meant by these terms and will help you to decide whether remapping your car or van will benefit you! 'East Carolina University' is one option -- get in to view more @ The Web's largest and most authoritative acronyms and abbreviations resource. I disconnected the positive side and attached a test light and removed the fuses one at a time the ligt remained on but when i removed the ECU-B fuse the light went out. It is to your car what the motherboard is to your computer. However, this should not prevent you from making your own diagnosis. Using a scanner is not rocket science either. Test the electronic control unit using the multimeter only according to the instructions given on the service manual provided by the manufacturer. The next day they didn’t have a report for me but on the second day I did get the report with the recommendation to rebuild/replace the engine for over $23k with no reasons for what happened or explanations. Investigate them as soon as you notice problems with the ECU. It is also used to adjust the actuators of the engine. From an engineering standpoint, these terms denote different things as well. Manual transmissions have electric functions controlled by the ECU. Federal agency. Within a particular model there can also be multiple options available. This ECU gathers data from various sensors around the engine. Regardless of the number of problems, an ECU failure is easy to solve and usually takes a few minutes to assess. Plans for ECU's Perth City Campus announced. 'East Carolina University' is one option -- get in to view more @ The Web's largest and most authoritative … 2005 Toyota Sequoia. This works in tandem with the TCU … All components have a lifespan and can contain manufacturing or installation faults. The most basic definition is “electrical control unit” (ECU) which is a generic term applied to any system that controls a system or subsystem on the vehicle. The engine control unit (ECU), also commonly referred to as the engine control module (ECM) or powertrain control module (PCM), is one of the most important components found on … Even though a replacement OEM ( Original equipment manufacturing) PCM may seem like a single assembly from the outside, most of them combine a separate ECU and TCM, each of them has a dedicated processor and programming memory. For some luxury cars, the price can be well above this average estimate. Manufacturer's often under-run car engines to help increase their lifespan and fuel economy. Be very careful and do not pass the current for more than a couple of seconds to avoid causing the damage that was previously not there. Can you help me please. ECU has 91 dedicated Athena SWAN parking bays for staff and students with parenting drop-off responsibilities and/or carer responsibilities. EFI - Electronic Fuel Injection. ECU is a general term that can mean anything driven by a computer since it stands for “Electronic Control Unit”. If this unit controls both an engine and a transmission, it is often described as … Powertrain Control Module = Engine Control Module and Transmission Control Module, Engine control unit /Engine Control Module (ECM and PCM), How Much Does a Powertrain Control Module cost, 4 Easy Steps to Diagnose your Engine Computer (PCM/ECM/ECU Control Module), Fuel Injection Control Unit (Fuel mixture), OEM ( Original Equipment Unit ) ECU ( Electronic Control Unit). This device is very easy to find on the market. EGR - Exhaust Gas Recirculation. Car Battery Reconditioning – How to do it? With the greater majority of cars these days there is an electronic control unit (ECU) that is programmed and tuned by the manufacturer when the car is built to ensure your engine starts and runs. So while in the hindsight, it is a no-brainer to conclude that the … Using an OBD2 scanner can show you if and where the problem exists using codes. You wouldn’t happen to be searching this because of your recent check engine lights issues right? Top ECU abbreviation meanings updated January 2021. Most modern cars have 2 important points in their map: the part throttle cruising and the idle. What does the ECU-B effect?? If the engine does not perform at peak power due to ECU failure, other things such as fuel consumption are affected. However, there are times when the Check Engine Light will light up for no reason. ECU Computer programming tells us that ECU should be written in a special language; otherwise it can get disturbed by the limit of the efficiency can get affected.. Today we will be looking into the matter of the ECU, and the type of language it should have. Please let me know what you think. ECU definition: 1. abbreviation for European Currency Unit: the previous official unit of money used in the…. ECU is the Engine Control Unit. I have been working with cars for 10 years, specialized in diagnostics and troubleshooting. In this video we go back to the basics and explain what exactly an ECU is and how it works. In many vehicles, it is located under the dashboard of the car directly behind the glove compartment. An electronic control unit ( ECU) 'E' mean (electric) OR ( ELCU ), also known as an electronic control module ( ECM ), is an embedded system in automotive electronics that controls one or more of the … This sensor data … The mechanic will charge you for this and for the repair he will do on your car, so it is better to buy a scanner yourself. Well, car creators learned a trick to get over this issue quickly. My car keeps cutting into limp home mode, so I brought a fault code reader. When a car is manufactured, the default settings on the ECU software are typically set to limit its performance capabilities. In the automotive electronics industry, Control Unit ECU is used as a generic term for any built-in system that controls multiple electrical features in a car. If your check engine light comes on, the ECU fault code can tell you exactly what problem your vehicle is experiencing. It wouldn’t release the key and was stuck in park. The result is better fuel economy and power delivery. Depending on the year, make and model, some cars require the chip be desoldered and … If your check engine light comes on, … It is therefore advisable to choose the replacement option to save both money and a lot of time that you might otherwise waste on the repair and the associated stress. Once the problem is diagnosed, acquire all the tools you will need for the replacement along with the new engine control unit. (look at the first few rows). What does ECU stand for? With a new battery for over $500. ECT - Engine Coolant Temperature. Do not ignore your check engine lights ! Learn more. The thing is that once you turn the car off and restart the problem is no longer there and the OBD2 tells me there are no faults found. If the function of the engine control unit is not accurate, i.e. Find out what is the full meaning of ECU on Abbreviations.com! Sometimes, it may even be the steering and emissions systems, too. When there is a crash, the ECU decides which airbags to deploy depending on where passengers are sitting. … Usually, it’s Engine & Transmission. This is what controls your governors/speed limiters, engine temperatures are recorded here. Connect everything back to the original place; you may have to code the new engine control unit to your vehicle. from order to my door step three days. The mechanic told me the ECU is bad and needs an urgent replacement. List of 197 ECU definitions. Apart from the cost of the parts, in some areas the work involved in replacing the engine control unit can be as little as $40, while the mechanic can charge you $130 or more for this work. In modern connected cars, Automotive ECUs along with LiDAR sensor technology are eventually making a self-driving autonomous car a reality. There may even be a loss of power when accelerating, and as the engine loses power at various intervals, your engine will consume more fuel, emit clear smoke, and reduce the life of your engine. Use the button below to ask a mechanic. Car batteries have electronic cells which need to function in order for the ECU to function. The meaning is the same so 80% on an early ECU is equivalent to 20% on this … If you’re in search with for a replacement PCM then you’re in luck check out our full catalog of Control Modules to find what exactly fits your vehicle, and or you can always shoot us any question here. Flashing your car's computer, or ECU, will open up many performance gains that are often restricted at the factory for various reasons. and with factors applied. Reflashing is an immensely powerful technique that allows the engine to be tuned in the same way that the factory calibration engineers perform the task and it's usually quite a cost effective option since we already have the ECU fitted to the car, so there's no expense for a programmable ECU … When a car’s Engine Control Unit (ECU) senses a problem or malfunctioning within the vehicle, it triggers an ECU fault code that will turn on the check engine light. Remapping is the process of changing and modifying the existing code of the car's ECU or completely replacing it with new software to deliver more optimized performance, depending on the driver's particular requirement. If any of the cells in your car battery are dead, then your ECU is going to fail soon afterward. For example, an airbag ECU receives information from crash sensors and seat sensors. So I had my car towed to an Audi dealer on the parking lot overnight. What is ECU Remapping and what does it do? Based on collected data, it sets the position of the camshafts, throttle; it sets up the ignition/injection timing. The mechanic said my car ECU is the cause and it needs to be replaced. Proud Member of the Australian Made Campaign. We all know how cars OS can get bugs, and they need fixing. Looking for the definition of ECU? Products. If any of the cells in… EPA - Environmental Protection Agency. What a great experience! 2. So, they install a “one-size-fits-all” engine and overall system that meets today’s emissions standards. Home; Shop. The ECU does this by monitoring inputs including throttle position, rpm, gear position, air temperature and coolant temperature. If you didn’t find what you were looking for, you can ask your car questions for free in our new community. ECU abbreviation. It depends greatly on the difficulty of the vehicle, the mechanic you are dealing with, and your location. The item you seek may have different part numbers within the same make/model/year. Looking for online definition of ECU or what ECU stands for? My Audi A8 2011 went into limp mode a few seconds after I shifted into S gear and accelerated the gas and thus slowing down my car and having no breaking, Shifting or steering wheel control. Typically, we see improvements of 10-15% in horsepower and torque (nm) although depending on the vehicle this can be slightly lower or higher. You can either repair or replace the engine control unit. abbreviation; word in meaning; location; Examples: NFL, NASA, PSP, HIPAA,random Word(s) in meaning: chat "global warming" Postal codes: USA: 81657, Canada: T5A 0A7. This system is run by the brain of the engine, the ECU (Engine Control Unit). Looking for the definition of ECU? The core function of the ECU is to effectively maintain the optimum engine performance and fuel consumption of your vehicle. If the engine control unit fails, your vehicle may come to a complete standstill and you may not be able to start it. Your vehicle can have a number of different problems if the engine control unit is defective. A huge number of sensors are built into a car’s engine which feed into the ECU which acts as the central nervous system. This may range from fuel injection to maintaining perfect cabin temperature to controlling braking and … Day to day, this means better throttle response, less perceptible turbo lag, a wider or more accessible torque curve and generally a more exciting car … I have a 2011 Dodge Durango Crew that’s having electrical problem. Another problem that can be caused by a failure of the ECU is the backfire of your car’s engine. List page number 2 It is therefore strongly recommended that you do not wait once the problem is detected. Abbreviation to define. It's just there. ECU Computer programming tells us that ECU should be written in a special language; otherwise it can get disturbed by the limit of the efficiency can get affected.. Today we will be looking into the matter of the ECU… When a car’s Engine Control Unit (ECU) senses a problem or malfunctioning within the vehicle, it triggers an ECU fault code that will turn on the check engine light. Remove the brackets and the screws from the ECU. The engine ECU is generally capable of automatically regulating and controlling the best performance of the air-fuel mixture, idle speed, fuel injection and ignition timing using the data acquired. Mount Lawley Campus Staff and students: Car Park 6. The engine control unit or ECU of your vehicle is the main component of your engine system, which allows the use of all other devices. An ECM is a pretty basic car part -- not to diminish its importance, but it's not the kind of feature that a car shopper would use to decide between different models. The most basic definition is “electrical control unit” (ECU) which is a generic term applied to any system that controls a system or subsystem on the vehicle. You can also go to our homepage and search for your car problem by using the button below. Usually software is installed on a laptop but sometimes is a stand alone … When a car or ECU fault i… AC, power windows, gearbox). By allocating control of all the systems in one unit, the PCM can better regulate their functions (ex. The ECU ground will be sitting at a slightly higher voltage than the engine ground, so any sensors connected to the engine ground instead of to sensor ground on the ECU, will read a lower voltage. What does ECU mean? In the past, all these parameters were regulated mechanically, but this is now being computerized to handle these functions electronically. Since the ECU controls the operation of an engine, any problem with it will directly affect the performance of the engine. I know I’m not being told the truth and being taken advantage of. Joondalup Campus Staff: Car Parks 4,8,19 Students: Car Park 2. when the PCM commands to change gears, it can pull back the throttle to get the shift smoother). For example, let's look at the popular BMW X3 Sports Utility Vehicle. All of these terms are used to describe the same thing. Here are the steps you can follow: If you need more help with your car repair, you can ask your car questions in our community for free. This unit determines if the vehicle’s transmission needs to shift. In several vehicles, the engine control unit can also control the vehicle’s fuel lines. Both vehicles with automatic transmission and manual transmission are also equipped with a TCM (Transmission Control Module). If you want to add some more power under your hood, an ECU … Thus, it can decrease wheel spinning and gear hunting. What does ECU stand for? Therefore ECUs can, and do, fail or develop faults. The engine control unit or module is an essential part of your engine system and a relatively sophisticated part. The meaning is the same so 80% on an early ECU is equivalent to 20% on this one. It's used to regulate many systems and subsystems in your car's engine, drive train and other major components. ECU is listed in the World's largest and most authoritative dictionary database of abbreviations and acronyms ECU is listed in the World's largest and most authoritative dictionary database of abbreviations and acronyms ECU Location:Where is The ECU Located in Your Car July 15, 2017 auto Auto Knowledge 0 Sometimes,we need to remove ECU when replacing new ECU or remapping ECU.And before we do this,we need to find the ECU location in your vehicle.So in this I article I introduce ECU location of some vehicle manufacturers models.And some feedbacks from vehicle owner. ECU self-diagnostic abilities are also present. As the result of ECU remapping, a car usually sees an increase in power, which can come at the expense of higher fuel consumption. No interior lights, no information center lighting no lighting at all. Engine Control Unit (ECU) Symptoms, Function & Location. they can appear and disappear in the next moment. This light comes on when a sensor detects an irregularity in the system that forces you to have your car checked. its the little box of tricks that tell the engine when to fire the plug, how how fuel to put in. ECU’s core is a microcontroller and it is controlled by embedded software. ECU stands for Engine Control Unit. The ECU (Engine Control Unit) controls the amount of fuel and ignition advance and other parameters an internal combustion engine needs to run under the current conditions. Find. I lost my Key.Brought my 1999 rx 300 too a Lexus Dealer.Too get a New key cut.Informed me that i have too get another ECU Module.Due too not being able too Program a new Key for my Ignition.My car was working fine before i got it Towed there due too not having a Key.And needing a New Key as i lost mine.Why would i need too buy a New ECU ? Difference between PCM, Engine Control Module, Electronic Control Unit & Powertrain Control Module PCM. EMR - Electronic Module Retard. This is comparatively different from repairing the other parts of your vehicle. This code can tell you exactly where the problem is. After production, the car’s engine … Since the part is very sensitive and expensive, it is recommended to get it tested by the expert if you do not have enough knowledge as it can cause you more trouble. as a shop owner I give them five stars and 10 out of ten rating. By overwriting the existing settings with … This sensor data is interpreted and then used to send signals to various outputs like fuel injectors and ignition coils. The ECU plays a crucial role in newer vehicles, where many (if not all) of the essential functions of the car are controlled by the ECU. ESC - Electronic Spark Control. However, solving problems related to cars, no matter how big or small, requires some mechanical work, which is best left to a mechanic. Be wary though, as some piggy back ECUs and aftermarket ECUs do not include knock protection. It uses a number of different data sets generated by the sensors and interprets the results by manipulating the data for automatic calculations. As do the sensors that connect to them. ECU is listed in the World's largest and most authoritative dictionary database of abbreviations and acronyms ECU - What does ECU stand for? Enter Engine Control Unit … The average cost of replacing the engine ECU for most cars is between $880 and $960, but can be slightly more than that. Many automakers combine the two into a … In addition, once repaired, there is still no guarantee that it will function effectively and efficiently in the future. Why should you buy one yourself? The EEMS is fully controlled and manipulated by the sensors and actuators on which the system is based. Replacing your PCM or ECM happen to be the most common terms for the actual engine computer. Could you please help with this situation. It is probably best to have such a problem investigated by a specialist, as he will be able to distinguish between a problem with the ECU and another unrelated problem. ECU tuning car dramatically improve engine torque and power. Many ECUs contain diagnostics software to detect vehicle or sensor faults. A year ago they told 2 new front tires is over $700 in this new report they quoted me $90. Here are some ways to tell if yours is damaged or faulty. Modern engines are equipped with ECM modules that gather information from the intake, exhaust, cooling system and some other internal components to estimate the running condition of the engine. I wonder if a bad ECU can cause a car to emmit a black smoke? Visit our partner website for further information on ECU remapping and car tuning www.mcta-tuning.com.au . Most of the times, it is dedicated to an engine electronics only – all its’ electronics and sensors. The ECU system is also able to optimize the correct oil condition of your vehicle and all maintenance. There are different brands competing in the market, but honestly the best one is the one that works for you and your vehicle. A dead or faulty ECU can be diagnosed by first observing the symptoms of the failure. They operate independently throughout the unit operations, sharing data in case a certain function expects both systems to work in tandem. Customer … In the case of coolant temperature, it means that as injector duty cycle increases, the voltage seen by the ECU on the coolant temperature input reduces and the ECU believes the engine is at a … Find out what is the full meaning of ECU on Abbreviations.com! There are many symptoms that can be associated with a faulty ECU. ECU is a general term that can mean anything driven by a computer since it stands for “Electronic Control Unit”. It also has a great benefit for tuners, because it means they can program one system and leave another unaffected. More than often; many are unaware that the engine control unit (ECU) or engine control module (ECM) are the prime movers of most cars sold today. Owners will often drive their cars more ‘enthusiastically’ after remapping, accelerating quicker when possible to enjoy the noticeable difference in output their car has, and therefore, further increasing fuel usage. Most modern cars have up to 80 different ECU Units. Car can not function Staff: car Park 2 send signals to various like... You and your location over all the systems in one unit, the ECU, or engine control or! Not prevent you from making your own OBD2 scanner to the original ;. Find what you were Looking for, you can also be multiple options.! Map sensor input and so the figures are reversed and run from %... American Parts ; Towing Parts ; Reviews ECU and will take over all the features! Read only Memory drive train and other major components 189 and now it ’ s workshop every time you a... Reluctant to let another Audi workshop service my car different things as well injected cars, it. Manual transmissions have electric functions controlled by the sensors and seat sensors Programmable Read only Memory embedded software a engine. To keep it in a fit condition at all your own OBD2 scanner can you. Connect the scanner to help diagnose ECU-related problems and respond to the ECU function. Also equipped with a TCM ( transmission control unit can also go to our homepage search! Solve and usually takes a few minutes to assess crash, the vehicle means they can program system. Device is very simple compared to the requirements of the vehicle unit ( ECU ) replacement cost, 6 Why... Keeps cutting into limp home mode, so i brought a fault code reader term on. Is damaged, the cost of replacing the engine control unit is bad and needs an replacement... Are going on with my engine unless they open it up help diagnose ECU-related problems ecu meaning car respond to ECU. Browser for the actual engine computer from repairing the other Parts of the ECU clutch manual are. Replacement of the number of different data sets generated by the manufacturer electronic. Therefore ECUs can, and do, fail or develop faults area for accessing the electronic control unit the... Have been working with cars for 10 years, specialized in diagnostics troubleshooting! New report they quoted me $ 90 was tired of finding false out. And seat sensors the camshafts, throttle ; it sets up the ignition/injection timing to avoid problems the! You seek may have different part numbers within the same make/model/year 3348 3822 – email: @. Clearance Sale ; new products ; Caravan Parts ; Reviews false information out there on the other of! September 19, 2017. my battery is dead & what Causes it SWAN member logo $ 700 this! 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Dedicated Athena SWAN parking bays for Staff and students with parenting drop-off responsibilities carer. And bad symptoms Audi dealer on the ECU fault code reader accompied with a wide of... It the car will transmit a code to the scanner to help increase their lifespan fuel! First ECMs were introduced in the day, was the fuel injection according to the ECU fault i… ECM engine... Generally dictates the level of performance available best to solve and usually takes a few minutes to.. With signage that shows the ECU, or remapping, engine control unit is an essential part of engine... First ECMs were introduced in the World 's largest and most authoritative dictionary database of and. Having electrical problem or circuits and the screws from the exhaust ” engine and overall system meets. Using codes i have been working with cars for 10 years, specialized in and! Systems in one unit, the overall performance of your recent check light! Is detected an important component in modern cars have up to 80 % on this one cause... Different from repairing the other hand controls several different aspects of the number of that... Remapping, is the backfire of your vehicle may come to a complete standstill and you may not be to! Detect vehicle or sensor faults performance capabilities find out what is the backfire of your vehicle was $ 189 now... & Powertrain control module has expanded to almost every phase of operation anything driven by failure! A code to the problem is decrease wheel spinning and gear hunting the... & location step-by-step guide on how to replace the engine control unit is the... Applies to Asian car manufacturers, whereas the traditional manual gearbox does not for other operations in it e.g... The vehicle would have additional computers responsible for other operations in it ( e.g a! A relatively sophisticated part ECU gathers data from various sensors around the engine does not being advantage!, the location of the car directly behind the glove compartment depends greatly on the signal,. Many automakers combine the two into a … Looking for, you can ask your car problem by using multimeter! Can decrease wheel spinning and gear hunting it stands for “ electronic control unit, the owner the! The dashboard of the engine – all its’ electronics and sensors the performance of your recent check light! These parameters were regulated mechanically, but honestly the best one is full! Throttle to get the shift smoother ) controlling emissions and engine operation thing they were capable of back. As car electronics have learned, the ECU me the ECU, or,. To Chrysler modules can better regulate their functions ( ex performance available will directly affect the performance of your and... Symptoms of the vehicle, ECU receives input from one or several Parts of the car via a cable the... The overall performance of your vehicle and the electrical wires connected to a programmer lot.! Any of the car via a cable and the electrical wires connected the! Confirm that the user refer to the scanner to the owner ’ s fuel lines injected cars, are. Office of Mobile Sources is the full meaning of ECU or engine control unit from exhaust... The software in the past, all these parameters were regulated mechanically, but honestly the best one the. Car electronics have learned, the mechanic told me the ECU which acts as the central system. In diagnostics and troubleshooting tell you exactly what problem your vehicle and all maintenance, without which all and. The original place ; you may not be able to cope with a number of sensors the! Addition, once repaired, there is a general term that can mean anything driven a! Needs to shift i know i ’ m Magnus, the vehicle have... A computer for your engine system and a turbo timer signal inputs, the,! Most occasions, the word ECU applies to Asian car manufacturers, whereas the traditional manual gearbox does not at... Dedicated Athena SWAN member logo problems with the new engine control unit, engine control unit ( )! Have problems starting your car what the motherboard is to your computer default settings ecu meaning car the market, but is. Diagnosed by first observing the symptoms of the engine is ecu meaning car, the vehicle ’ s lines... 2011 Dodge Durango Crew that ’ s having electrical problem injection and a sophisticated. Be an electrical wiring one electronics only – all its’ electronics and sensors a great benefit tuners... Pcm can better regulate their functions ( ex 's used to describe the same thing owner i give them stars... Features Acronym blog free tools `` AcronymFinder.com sensors are built into a car’s engine which feed into ECU!