An internal combustion engine is essentially a big air pump that powers itself using fuel. For every vehicle an automobile manufacturer sells there is a specific electronic control unit (ECU) which belongs to that car. The ECU has the job of controlling the fuel injection, ignition and ancillaries of the engine using digitally stored equations and numeric tables, rather than by analogue means. With vehicles having multiple ECU they are divided on what tasks they perform. BMW codenames explained: we decipher all the E, F and G monikers Where all those E numbers come from: BMW's Munich HQ E30 or E46? Here the main microprocessor reads software from the memory and performs a self-check. Media For all media queries or to speak to one of our subject matter experts, please contact our media team.Telephone: (61 8) 6304 2222 With the demands of modern vehicles focusing on fuel efficiency and lower emissions, the mixture must be more tightly controlled. The check engine light staying on might mean a lot of possible errors but an ECU fault is one of the major ones. These more complex relays can have up to 9 pins of various sizes. ECU fault codes include a letter followed by four numbers. My mechanic/dealership says that you can’t reprogram, re-code, or swap a used BMW ECU between cars. With vehicles having multiple electronic control units, they are divided on what tasks they perform. Method 2. The ECU looks at the injector size to know how much fuel can flow through the injector (in a perfect world) It looks at the injector dead time. The 21 is the 'subgroup' of (8) bodywork, and the subgroup 21, is always wings, or fenders as they are known in the USA. As such, they are able to adapt to gradual changes in the operation of the engine. In a hot engine, this is easy to manage, but in a cold engine the liquid is less likely to vapourise and more fuel must be injected to keep the mixture ratio within the correct range for combustion. The ideal mixture, where all of the injected fuel is combusted and all oxygen is consumed by this combustion, is known as ‘stoichiometric’ or often as ‘Lambda’. High-level digital outputs - On many modern cars, the ECU fires the spark plugs, opens and closes the fuel injectors and turns the cooling fan on and off. There are multiple ECUs in a car that operates different features and controls multiple parameters. MHPAUTOS EXPERT; The basic part number is the most important one, you may need to contact the dealer spare parts as factory up grades may alter that part number. Once the data has been collected by the ECU, the processor must determine output specifications, such as fuel injector pulse width, as directed by the software stored within the unit. Other features will not work as well but frankly if the engine is dead other features don’t really matter that much. This definitely makes sense due to the politics of some makers of releasing ECU updated. These can include controlling fuel injector pulse width, exact timing of the ignition system, opening of an electronic throttle body or the activation of a radiator cooling fan. Within a particular model there can also be multiple options available. Similar Read: BHP vs Torque | Which is the Real Deal and Why? FORD FOCUS 2000-2007 ZETEC/SPI/SVT: Method 1. When the part is redesigned, the change needs to be noted so the Engineering part number is changed. Similarly, as the engine wears throughout, the ability to be an air pump deteriorates slightly and the opening angle of the throttle flap will need to change to maintain correct idle speed. In some circumstances, the self-diagnosis routine discovers a serious fault that either fundamentally prevents the engine from running, or shuts the engine down in the interest of safety. Quite simply put ECU is a device that controls all the electronic features in a car. In the Automotive industry, the term ECU often refers to an Engine Control Unit (ECU), or an Engine Control Module (ECM). ECU Part Numbers. It then reads data from the numerous sensors on the engine and converts them into useful information. Electronic Control Unit (ECU) Explained. This of course is "very bad tuning practice" and is … In the Automotive industry, the term ECU often refers to an Engine Control Unit (ECU), or an Engine Control Module (ECM). Battery voltage at least 12.0 V. All relevant coding and adaptation values have been transferred from the ORIGINAL (OLD) ECU to the REPLACEMENT (NEW) ECU. When you press the accelerator pedal, your throttle flap will open to allow more air in to the engine. Accord and Prelude ECUs can use a letter and number code. A faulty ECU is probably the worst thing for a car. The use of the monitoring processor became imperative with the application of drive-by-wire throttle control due to safety concerns should the main microprocessor develop a fault. The ECU then measures the speed of the vehicle when it undergoes accident and then using its onboard memory compares the data of whether it should launch the airbags or not. BMW ECU DME Reprogrammed and Rebuilt Explained We hope to help answer and give you solutions to the most commonly asked questions.  It does this by storing the Lambda values over previous journeys. This increase in the number of terminals over the standard 4 or 5 in more simple relays is often necessary because additional connections can be required for the in-built electronics (e.g. See the image on the link below to help me explain the numbers. Tuesday, March 13th, 2018 AT 9:54 PM. If this is the case you can determine which ECU Part number to use by inspecting the Part Number on the ECU (see below). Since a car engine spends most of its time at part throttle, the ECU concentrates on maximum efficiency in this area. Too little fuel - too much oxygen makes the combustion slow and weak. For every vehicle an automobile manufacturer sells there is a specific electronic control unit (ECU) which belongs to that car. If the ECU knows this dead time it knows the "actual injection time" Engine size (Eg. If the data provides enough reason the ECU deploys the airbags. What does an ECU do? Read More: Maruti Suzuki and Its Automatic Cars (and Transmissions) at Present. 3000cc, 3L ) The operation of the main processor inside the ECU and the activation of many outputs is overseen by a monitoring microprocessor – essentially a second computer that makes sure the main computer is doing everything correctly. The first stage of ECU operation is in fact power management. The power management system also allows the ECU to have full control over when it powers itself down – i.e. 37820-P72-A01. Many were adjusted manually by the driver while driving. Example. This could be just a steady 5 Volts for sensors, or over 200 Volts for the fuel injector circuits. Toyota Tundra ECU tuning is a modification that can greatly improve your trucks 5.7L V8 performance. If the data provides enough reason the ECU deploys … Let’s take an example of how ECU controls something by looking at how airbags are deployed during an accident. It is essentially a computer, a switching system and power management system in a very small case. It makes all the difference, you see The F01-era BMW 7-series. OdinEidolon wrote:I wonder if this kind of software update updates only SW or also HW numbers - this'd be very strange, but I also noticed the HW numbers on similar-aged 406s vary wildly.However - all these HW numbers seem to be roughly compatible - one ECU will accept the other with no big issue. In addition to this, in order for many sensors and actuators to work, the correct voltage has to be supplied by the ECU to components around the car. The car has sensors located around itself called the crash sensors which inform the ECU when a crash has occurred. Maruti WagonR vs Hyundai Santro | Battle Of The Economy Hatchbacks, 10 Super UNUSUAL Cars that ever existed in India, Second-Hand Motorcycle: 10 Things to Check Before Buying, Car Modifications In India | Legal Vs Illegal, Is Extended Warranty On Cars Worth The Money? Branch Address Contact Email; Arima: 44-46 Sorzano Street, Arima. For the purposes of this article, we will discuss the ECU as an Engine Control Unit. The engineers will design a part and assign it an Engineering part number, which is an alphanumeric reference code used by the assembly plants. These are often stored as 5 digit alphanumeric codes beginning with a P, B, C or a U, followed by 4 numbers. I have still not been able to find one which matches the numbers on my ECU. Make sure to have the PIN of the CAR. This is known as ‘closed loop’ operation, and is a major contribution to the advanced efficiency that comes from using engine ECUs. The item you seek may have different part numbers within the same make/model/year. ECU Worldwide is one of the largest NVOCCs in the ocean freight transportation industry, specializing in less-than-container load (LCL) freight consolidation, and full-container load (FCL) shipping. NUMBERS ON THE ECU/ECM/PCM MEANING? The car won’t start at all. The part number so far would then be 8D0 821, and all we need now is the last three digits. This may range from fuel injection to maintaining perfect cabin temperature to controlling braking and suspension. ECU's newly launched Digital Market platform gives researchers the opportunity to share innovations with the public. Flashback: Prior to the use of the ECU, this function was managed by a ‘choke’ on the carburetor. It doesn’t stop there. When a fault code is stored in the memory, it usually results in some of the logic within the software being bypassed with reduced engine efficiency, albeit with the engine still being able to function on a basic level. The ECU controls the engine ignition so a dead one will not start the car at all. Some started controlling mixture at idle speeds. Maruti Suzuki and Its Automatic Cars (and Transmissions) at Present, Turbocharger and its Major Types | Variable Geometry (VGT) vs Fixed Geometry (FGT), Fog Lights/Cornering Light | Here’s Everything You Need to Know, 6 Imported Cars that Introduced India to Modern Automobiles. That covers the brief explanation of the Electronic Control Unit. The ECU will read this measurement, and constantly adjust the fuel quantity injected to keep the mixture as close to Lambda = 1.0 as possible. Injector Size Limit For Stock ECU: It has a long list of supersessions: 038 145 209 038 145 209 A 038 145 209 C 038 145 209 E 038 145 209 H 038 145 209 K 038 145 209 N 038 145 209 M 038 145 209 Q But when you look further into it, there is a tangled web, where some part numbers skip further down the list (depending what Engine Code or vehicle you are looking at), the Manufacturer changes from … Too much fuel - too little oxygen, and the combustion is dirty and wasteful. Do you. In the 1980s, with the mainstream introduction of ECUs, electronic Idle Air Control valves were introduced which solved many of these issues, however the ECU was now controlling part of the airflow and yet all of the other components remained. […] few (mostly older models) are mechanical and driven by the engine. A Guide to the Meaning Behind Porsche’s Part Numbers. This information is often transmitted over the CANbus – your car’s internal computer network – to other electronic modules. No. In most cases, you will see a “P” that indicates a powertain issue, which includes a vehicle’s engine, emission, and … In 2015 consumers had the … Example. Not only is the amount of mixture important, but the ratio of that mixture has to be correct. The ECU was now handling vehicle security. 1 HW number => a lot off SW numbers. Thermal management is a key part of ECU design. What Is An ECU? The ECU now has full control over the combustion of the mixture, the opening of the throttle, the cooling system and emission systems. For the purposes of this article, we will discuss the ECU as an Engine Control Unit. Originating in the car and heavy-duty truck industry in the United States, it is now widely used in other parts of the world. In an electric radiator fan, an ECU controls when the fan runs and when to stop, while a thermal clutch performs the same function in […], Content Writer at GoMechanic | Loves Writing | Loves Cars | You know where this is heading | Level 12 Meme Lord | EVolution. It determines the position of the engine’s internals using a Crankshaft Position Sensor so that the injectors and ignition system are activated at precisely the correct time. That covers how an ECU works let us take a look at what happens if it is faulty and even worse when it breaks down. Engine Control Unit (ECU) Swapping (NEW ECU) Prerequisites: The NEW ECU is already installed in the car. As components in hydraulic systems wear, they require changes to the timing of solenoid activation to compensate. All of these tasks require digital outputs. Details of these codes and their descriptions can be found here: OBDII Fault Codes. Most ECUs have sophisticated power management due to the variety of components inside, accurately regulating 1.8V, 2.6V, 3.3V, 5V, 30V and upto 250V all from the car’s 10-15V supply. Â. The ECU has many internal power requirements for the hundreds of internal components to function correctly. The processor only understands digital numbers, so the analog-to-digital converter changes this voltage into a 10-bit digital number. Yes. The ECU then measures the speed of the vehicle when it undergoes accident and then using its onboard memory compares the data of whether it should launch the airbags or not. Modern vehicles are built to much tighter tolerances than those of the past, however they are still susceptible to manufacturing variation, mechanical wear and environmental aspects. This is where various voltages are regulated and the power-up of the ECU is handled. Here Is A List Of Illegal Car Modifications In India. Â. We service destinations in over 30 countries … Some of these types are as follows. This simple method required regular adjustment of idle speed and was prone to deviation when an engine was cold or as various parts wore out. (1 037 353 776 in this case) Is this the first SW number the HW was released with? Introduced in the 90s, it is now fitted to almost every engine produced today, but what are the advantages over a traditional cable? 667-4563/667-2318/667-3477. There are several numbers on the ECU. Want Answer 1. The only way to meet these strict requirements is to hand over control of the engine to an ECU, the Engine Control Unit. not necessarily when you turn off the ignition switch. An ECU is often referred to as the ‘brain’ of the engine. In automotive electronics, an electronic control unit (ECU), also called a control unit or control module, is an embedded system that controls one or more of the electrical subsystems in a vehicle. 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