In this article, you will learn about such a device as an ECU. What is it and for what purposes does it need a car? Now let's try to figure it out. In recent years, cars in which fuel injection was carried out using a carburetor have gone out of production. Today, all cars are equipped with forced injection systems. The principle of their work is much simpler, but the probability of breakage is greater. In particular, if one sensor comes out, the engine starts to work incorrectly.
How does the control unit work?
This device is also called the "brain". But it's true, it is this black box that "thinks" how the engine should work in various modes. Every second, he monitors dozens of engine parameters, selects the most optimal percentage of air in the mixture with gasoline. Opens and closes the injectors in a timely manner, which supply fuel to the combustion chambers. It is unlikely that anyone can think as fast as they do. Not only sensors, but also actuators are connected to it. For example, the same nozzles, as well as others. To study the principle of operation in more detail, you will need to consider the diagram of this device. But the schematic diagram of the ECU is given in the article.
ECU internals
It is based on a microcontroller. It has input and output ports to which all mechanisms and sensors are connected. Among the latter, it is worth highlighting the one that measures the air flow. Using his example, we will consider how signals are sent to the electronic control unit. All sensors are connected to the input ports either using special voltage dividers or amplifiers on the op amp. This is on microcircuits or field-effect transistors. With their help, the level of the signal coming from the sensors is increased. But the output ports are necessary for control. It is worth noting that the pinout of the ECU for different cars is different. Therefore, it is unlikely that it will be possible to use the brains from the Chevrolet on the Lada without significant alterations. For example, nozzles are connected to them. But not everything is so simple, the output port of the microcontroller can only control a weak load. In other words, the nozzle winding cannot be connected directly to it. Therefore, special assemblies on field-effect transistors are installed between them. They allow you to amplify many times the signal from the controller. They are called Darlington assemblies.
Work algorithm
But without one component, the microcontroller will not be able to work - without an algorithm. Visually, it can be represented as a tree with many parameters. It contains all the "questions" that need to be answered by the electronic brain. For example, if the engine speed is 2000 rpm and the oxygen concentration is too low, then the air flow increases. What should the engine do in this case? The microcontroller instantly answers all these questions, leading the algorithm to solve the problem. And then it sends pulses to the output ports, bringing the engine to a normal state. This is nothing but the firmware of the ECU.
Where is the ECU installed?
It is installed on all injection cars. With its help, the analysis and collection of all information that comes from sensors located on the computer is carried out. Unfortunately, the electronic unit sometimes fails. Therefore, it must be replaced with a new one. Before starting repairs related to the removal of the electronic unit, you will need to de-energize the power supply of the entire vehicle. To do this, disconnect the negative terminal from the battery. This will avoid accidental short circuits in the electrical circuit. Please note that even a short-term one will easily provoke an exit from the working state of certain elements, in particular semiconductors in the control unit, as well as fuses. Pay attention to where the ECU is located. On the first Lada Kalina cars, for example, it is located directly under the stove radiator. And if there are leaks, the control unit instantly burns out.
Removing the electronic control unit
If we take a VAZ 2107 car as an example, then in it the ECU (what it is, you already know) is located under the dashboard, in the area of \u200b\u200bthe passenger's feet. To make it more convenient to dismantle the device, you will need to remove the shelf, which is located directly under the glove box. To do this, you need to unscrew the screws with which it is attached to the parprise. To provide access to the electronic control unit, it is also necessary to dismantle the bracket on which the fuses are located, and the relays powered by this device. Now you can disconnect all wires from the electronic unit. The body is fixed with two nuts to the car body. Using the key to "10" it is necessary to unscrew these nuts and completely remove the control unit. That's all, the engine ECU is completely dismantled, it is ready for repair work or replacement. Installation of a new device is done in the reverse order.
Sensor Diagnostics
Consider the example of a domestic VAZ car, on which the DMRV is the most important element in taking into account all the characteristics that must be taken into account for proper fuel injection. As you already know, all the data that comes from this device affects the operation of the entire engine. The ECU firmware is extremely important, or more precisely, it is a fuel card, which contains several important parameters. In particular, the amount of air and gasoline supplied to the mixture formation ramp, crankshaft speed and engine load. Before replacing this device, it is necessary to carry out a small diagnostic. An initial check can be done with a conventional multimeter. With its help, it is necessary to check the voltage value that is present at the sensor at the terminals.
To do this, disconnect the plug from it. Install the multimeter in the position in which the voltage is measured. The negative wire is connected to the mass of the internal combustion engine. With the ignition on, the voltage is measured at the fifth pin in the plug going to the sensor. The benchmark should be kept at a value of about 12 volts. If there is a strong deviation, then there is a malfunction of the engine ECU or the wiring to the sensor is broken. There should be about 5 volts on the fourth pin. If there is a significant deviation from this value, then the reason for this is also a violation of the wiring, or it lies in the control unit itself.
Replacing the air flow sensor - stable operation of the engine and ECU
Now you are aware of the ECU. What is it, for what purposes is it necessary, you know. It's time to talk a little about the measurement devices that affect its correct operation. Replacing the sensor is pretty easy. To do this, use a Phillips screwdriver to loosen the clamp that secures the pipe. Next, remove the sleeve, which is carried out by the removal of air. After that, using the “10” key, it is necessary to unscrew the two screws that fasten the mass air flow sensor directly to the air filter. The sensor can then be completely removed. The device is installed in the reverse order. If you remove the sensor for cleaning, do not try to wash the coil, touch it with your hands or other objects during work. Only spraying on the surface of the platinum wire is allowed.
Conclusion
You learned a little about the ECU. What is it, for sure understood. For what purposes does the car need it - too. Try to monitor the state of not only the electronic unit, but also the sensors and actuators. They must be in perfect condition so that there are no problems.
Almost every car owner sooner or later faces the need to replace the ECU. For this, drivers can have a lot of reasons: the effect of moisture on the block and its elements, or the "concussion" of the car after an accident. One way or another, it is impossible to replace the computer without knowing where this element of the car is located.
1 Dismantling and replacing the control unit in Lada Kalina
Quite often, owners of domestic cars are forced to replace the ECU with an engine due to antifreeze getting into the control unit. As practice shows, this primarily concerns drivers. Lada Kalina. If this car has been subjected to flooding of the engine compartment at least once, then neither nor its drying will save the part from breakage. Engine ECU in this carmaker model VAZ located at the bottom of the console, between the heating radiator and the floor. You can get to the unit from the front passenger side. To do this, it is necessary to dismantle the protective plastic cover, which is fixed by 1 self-tapping screw. Having done this, we get direct access to the engine control unit.
To replace a broken unit, you must first remove the terminal from the battery. After that, unscrew the 2 screws holding the ECU Lada Kalina. Next, we take the block with one hand and gently pull it towards the front passenger door. At the same time, we hold the wires with the other hand so that they do not rest against the carpet.
Next, you need to disconnect the block from the wires. To do this, we look for where the connector lock is in the form of a bracket, and pull it to the side. After that, we received a car without an ECU, ready for the installation of new equipment.
Before installing a new engine control unit on Lada Kalina, it is worth remembering that not all models of "brains" are suitable for this. For example, blocks from a world famous company Bosch, although they are very popular, they still have their drawbacks. Many owners of domestic cars complain about changes in the operation of the car for the worse. According to their observations, a car with an ECU Bosch very often does not respond to driver commands. Such "braking" not only infuriates the driver, but also contributes to the creation of a dangerous situation on the road. A small advantage that Kalina drivers get after installing an ECU Bosch, we can call a decrease in fuel consumption by 0.5–1 l.
Many experts advise installing an ECU from Itelma and Avtel companies on Lada Kalina. Among the advantages of such blocks it is worth highlighting:
- ease of installation;
- low cost (from 2500 to 4700 rubles);
- compatibility with almost all models of domestic cars, regardless of configuration;
- engine control units from these manufacturers already have standard firmware with the latest updates upon purchase.
Replacing a faulty ECU with an engine Lada Kalina performed by a very simple algorithm. To begin with, wires are connected to the new block. Next, the part is installed in place of the old block, after which it is necessary to connect the terminal to the battery. After that, we fasten the screws and insert the overlay.
Installation of new equipment at car services costs about 3-5 thousand rubles. We made an independent replacement of the computer, spending 1 hour of time, but saving a good amount of money.
2 Replacing a faulty ECU with a Ford Focus II
Not much less often than domestic cars, foreign cars need to replace the ECU with engines. It would seem, how is this possible - after all, foreign concerns use more reliable materials for the production of cars. This is true, however, in the harsh conditions of our country, quality sometimes has nothing to do with the durability of car parts.
Let's take a car as an example. Ford Focus second generation and its ECU. To protect this element of the machine, the manufacturer used high-strength protective pads. The engine control unit Focus located under the engine on the right front wheel side. However, neither the location of the computer nor the means of protection are able to protect the part from the damage that it receives during operation on domestic roads.
As practice shows, almost every second block Focus receives on our roads "incompatible with life" damage. And this despite the fact that the part closest to the block is located at a distance of 10 cm.
In other words, the ECU damaged only from contact with the lining, which are designed to protect it. One way or another, the owner gets the broken "brains" of the car, which must be changed. Consider the process of replacing a block using an example Ford Focus II generations with the R4 Duratec-HE engine and a volume of 1.8 and 2.0 liters.
Before dismantling a faulty computer, we hang out Focus on the jack, raising the right front of the machine. Remove the right front wheel and fender liner. Then we unscrew 4 fixing bolts fixing the protective cover of the box of the engine control unit Focus. After that, we pull the computer out of the box. Then disconnect the wires from the computer. To do this, carefully move the fixing element to the side along the guides. At the final stage of work on replacing the computer, we connect the wires to the new unit and assemble all the parts in the reverse order.
3 ECU Hyundai Solaris - how to replace a faulty part
Most cars from Korean manufacturers have a very big minus in common - the fragility of electronic engine control units. Not only are the conditions for the "Koreans" in our country, to put it mildly, unfavorable. So also the quality of components of oriental cars leaves much to be desired. There are many examples to prove this:
- car engine ECU Hyundai already after the first year of operation of the machine, it begins to ignore the commands of the drivers;
- The Korean engine control unit, even with careful driving, is deformed, which indicates the manufacturer's savings on materials for the box;
- If a small amount of moisture enters the internal parts of the computer Solaris stuck, which makes further operation of the machine impossible.
ECU Hyundai Solaris located on the left side of the engine compartment of the car. To replace it, we clamp the latch and raise the bracket connecting the block and wires. Then disconnect the wires from the block connector. Next, using the head on "10" and the extension cord, unscrew the bolt that fixes the engine control unit on the battery platform. We also unscrew the bolt that secures the block bracket to the mudguard. Then we remove the bracket along with the “brains”, after which we pull out the Solaris electronic engine control unit from the bracket. Next, we take a new engine control unit and install it in the bracket, after which we assemble the entire structure in the reverse order.
Thus, we replaced the ECU with an engine for Hyundai Solaris. A similar procedure for Korean cars costs about 2-4 thousand rubles at the service station. We did all the work for free and for the benefit of ourselves.
All kinds of electronic devices are used in the control system of a modern car. They help in driving a vehicle, automating many processes, ensuring safety and improving other performance characteristics. To coordinate most processes, an electronic engine control unit is used.
In foreign-made cars, this node is called the ECU. A similar controller is installed with engines of various types, both with gasoline units and with diesel power plants. In the process of work, this node interacts with all kinds of sensors that capture current information about the current parameters of the car.
When determining the functionality of the engine ECU, what it is, and how it is involved in the processes, it is worth considering that the unit is processing the received parameters using the existing algorithm. Based on the available operating values of the motor, the ECU sends the appropriate commands to the actuators installed in the power unit.
In fact, the car is equipped with an on-board network. What is an ECU in a car? In fact, this is the main element of this network. Sometimes such electronics are not unreasonably called the main computer in a passenger car. A more slangy name is the word "brains".
Controllers are located not only in the internal combustion engine, but also in other systems of the machine. For example, they can be found in the following modules:
- gearbox "automatic";
- anti-lock braking system (ABS);
- airbag control;
- stability control systems (ESP, ESV, VSC, etc.);
- climate control unit, etc.
Each system has a personal management unit. They are all connected.
The main among the variety of electronics is the internal combustion engine control unit. Its tasks include continuous processing and exchange of current parameters with other systems. For interconnection, a special cable is used - the CAN bus. Thus, all elements are combined into a single digital system - the on-board network.
Thanks to the mutual two-way communication of all links included in the on-board network, optimization of the power plant operation is ensured.
When determining what an ECU is in a car where it is located, it must be taken into account that thanks to its operation it is possible to achieve the following comfortable indicators:
- fuel consumption is optimized;
- injection into the cylinders is timely regulated;
- during intake, a sufficient volume of air for the fuel mixture is automatically selected.
The performance of the main computer affects the power of the car, the torque value in different operating modes, as well as other important output characteristics. In such a situation, the module must always be operational.
Tasks assigned to the computer
Car manufacturers assign the following tasks to the control unit:
- ignition control;
- throttle position control;
- monitoring and adjustment of gas distribution phases;
- management and implementation of control functions over the phases of fuel injection;
- monitoring of the thermal state of the power plant and its cooling system;
- exhaust system control.
Information from sensors from the crankshaft about the frequency of its rotation is transmitted to the "brains". In this case, the current speed mode of the car, the voltage value of the entire control network, etc. are taken into account.
How it works and where is the engine control unit
The block is, in most cases, an electronic microcircuit densely loaded with elements. It is hidden under a plastic or metal case to protect it well from negative external influences. Quite often, the board is mounted in the engine compartment, closer to the center console. You can find out the actual location of the unit from the car manual.
The main elements of the head module are the microprocessor and memory blocks. Two or more output connectors are required for communication. They are easy to find on the outside for comfortable connection. One of them necessarily serves to interface with the vehicle's on-board network. Another one is diagnostic. It is through it that the connection with external scanning devices takes place.
There are several memory options on the main panel, allowing you to use all the features of this equipment. The permanent type of memory contains the main programs and algorithms for the current operation of the power plant. The entire software package is sewn in at the factory.
Separately, there is a module with RAM. With its help, the system manages to dynamically process the current information that comes from different sensors. At the same time, some results are saved for a short time. The following important parameters are stored in a separate memory module:
- the total time interval of operation of this engine;
- the total mileage traveled by the vehicle;
- the total amount of fuel consumed;
- codes of various accesses;
- error or lock codes.
Some data from such a module can be corrected, for example, the ECU error code is reset.
Electronic unit software
There are two types of software: control and functional. The first is monitoring pulses from sensors installed in different places. All accepted parameters must be within the acceptable ranges of values set by the manufacturer. If a drop out of a given segment by small values is detected, the device performance is updated.
The task of the functional module is to receive and process data. It also sends certain signals to the executive systems.
It is important to know that when control systems detect significant deviations from the established norms, the electronic unit is able to completely block the operation of the power plant.
In some cases, car owners seek to improve the performance of the computer or restore the software after some kind of failure. For such cases, a flashing of the electronics is carried out. In the course of work, standard software can be changed to third-party, corrected. This technique is called "chip tuning".
ECU error monitoring
The electronic unit provides a diagnostic system that provides a visual report to the car owner. When the controller detects a deviation, failure or some kind of error, the dashboard signals this with the corresponding light icon. Most often it is presented in yellow or red. This may be a pictogram with the designation "check-engine" (lit check).
The manufacturer can provide a corresponding personal numeric or alphabetic code for the error that has appeared. All such combinations are recorded in the memory of the electronic unit. There is a special place on the board for this. Connected special equipment in the form of a scanner helps to identify failures. You must use the appropriate cable and diagnostic connector.
The recorded parameters of deviations are read and their corresponding decoding takes place. At the same time, the system displays all the necessary information on the attached monitor. By studying the information received, it will be possible to clarify the current state of the vehicle.
Popular car electronic computer malfunctions
Traditionally, the ECU is a fairly reliable device in modern cars. However, depending on the quality of operation of the car or external factors, the system is capable of malfunctioning. Common reasons for the failure of such electronics are the following factors:
- significant heating of the device;
- a short circuit in the system;
- moisture penetration into the device case, connectors or bare areas;
- external mechanical damage to equipment;
- emerging corrosion processes.
Various characteristics help to indirectly identify malfunctions in the operation of electronics, for example, the motor fails with absolutely operable sensors and other systems of the power plant. Proper performance directly depends on the quality of the voltage in the entire on-board system of the car.
The failure of the car computer leads to unstable operation and failures in different ICE modes. Sometimes such an event is characterized by a complete blockage of the power plant. In this case, the "check" lights up on the instrument panel. It will not be possible to simply reset such an error, and if this happens, then the cause of the problem will not disappear, and the corresponding indicator will soon appear again.
In such a situation, it is necessary to diagnose the state of the computer. We recommend that you completely replace the failed board. It is believed that it is possible to carry out an independent repair of the microcircuit, which will cost less than installing a novelty. However, careful monitoring of performance and elimination of all possible malfunctions is required, which is not always available to motorists.
No modern car can function without an ECU. The electronic engine control unit, in fact, is the "brain" of the vehicle, allowing the most optimal way to carry out the engine control procedure. In this article, we will analyze in detail the issue of the device, the principle of operation of the computer, we will show photos and videos.
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ECU description
To begin with, let's figure out what an ECU is, where it can stand in a car and why this device is needed. Below are photos of the device. First of all, consider the main functions that this device performs.
Functions
The electronic engine control unit is designed to receive incoming pulses and process them, as well as further redirect signals to various regulators and sensors. The information received by the electronic engine management system is processed according to a certain algorithm. Subsequently, the engine ECU creates the necessary commands for the constituent components of the executive type.
Due to the fact that the vehicle has an electronic engine control unit, the system allows you to optimize the main parameters of the engine, namely:
- control the torque indicator;
- optimize the power of the internal combustion engine for optimal performance;
- control the composition of exhaust gases;
- optimize fuel consumption.
These functions are among the most basic, but depending on the model, the block can be supplemented with other functions. In addition, it is the engine control unit that allows you to diagnose most vehicle systems in case of breakdowns. If you notice that the CHECK light on the dashboard lights up, this indicates that the ECU has detected an error in the operation of certain systems. To obtain accurate information about the malfunction, it is necessary to diagnose the unit and read the received fault codes. The control lamp of the engine management system allows you to identify a breakdown in time and correct the problem.
Where is the engine control unit located? The device is, as can be seen from the photo, in the dashboard of the car. On most vehicles, its location is exactly this, in particular, the ECU is in the middle, inside the center console. It should be noted that contrary to popular belief, electronic engine control does not protect a car from theft and theft. To protect the car from theft, it is necessary to apply additional security measures, which we will discuss later.
Components
What elements does an electronic device for controlling an automobile internal combustion engine consist of:
- software;
- Hardware.
The software itself consists of several computational modules:
- Control. This component is initially configured to diagnose, check and inspect outgoing pulses. In addition, the control module allows you to correct the signal, if necessary. It should be noted that the control software component, if necessary, can even turn off the engine.
- Functional. The main purpose of the functional module is to receive impulses that come from various controllers and sensors. After receiving the signal, the functional module processes it, further generating the necessary commands for the equipment and devices of the executive type.
As for the hardware, it includes various electronic components - microprocessors, boards, etc. The analog-to-digital converter installed in the computer allows you to catch analog pulses coming to the device from various regulators. In the future, this converter converts signals into a digital format, to which, in fact, the main microprocessor is oriented.
In the event that there is a need for reverse conversion of signals that come from the processor, then the element converts them too. In addition, other pulse-type signals also enter the block, first passing through a converter, which converts their format to digital.
Protecting the ECU in a car from theft consists in installing a special reservoir or safe that will not allow an attacker to connect to the engine. The interchangeability of the ECU is, of course, good, because in the event of a device breakdown, the car owner can always replace it with a new one. However, because of this, the criminal has the opportunity to turn off the car block and install his own, which will bypass the system from auto theft.
Principle of operation
As for the principle of operation, the ECU circuit allows you to receive impulses from regulators, which in total can be more than a dozen:
- these are air flow signals;
- parameters coming from the oxygen sensor;
- data on the position and speed of the crankshaft;
- impulses about roughness of the track, etc.
In addition to the fact that the block processes the pulses, it also sends them to various devices:
- For car ignition. Depending on the type of motor, it can be either one or several coils. As you know, the purpose of ignition is to timely supply a spark from a candle to the internal combustion engine cylinders.
- LED indicator on the instrument panel- this element is intended for issuing messages to the driver and the presence of errors. Errors can concern not only the motor, but also the ECU.
- On the engine injectors allowing injection of a combustible mixture into the cylinders of the unit. In this case, the frequency of change in the volume of the mixture may vary, as it depends on different conditions. The main role in this case is played by the characteristics of the injectors, in particular, how they react to changes in commands from the unit, as well as the speed of their operation.
- Testers. Thanks to the testers, the car owner can connect to the control unit and diagnose the components of the motor (the author of the video is VideoMix).
Pros and cons of an electronic engine control unit
Let's start with the pros:
- The block allows you to optimize the dynamic parameters of the vehicle.
- Reduced air flow.
- Ease of starting the engine.
- When using the unit, the driver does not need to manually adjust the internal combustion engine parameters.
- In theory, thanks to the use of an ECU, it is possible to achieve an increase in environmental cleanliness parameters.
As for the disadvantages:
- The blocks themselves are quite expensive for their cost. If the device breaks down, most likely it will not be possible to repair it, it will only be necessary to replace it.
- To diagnose the state of operation of the motor and other auto systems, special equipment is needed, the cost of which is quite high. In addition, for this you need to have certain skills.
- For the correct operation of the device, the power supply circuit must be as reliable as possible.
- The car should always be refueled only with high-quality fuel.
Video "What is an ECU and how to replace it"
Detailed instructions for replacing the device are given in the video (the author of the video is Avto-Blogger).
Sorry, there are currently no surveys available.The introduction of electronics into the design of a car motor has led to the fact that the operation of the engine is controlled by the electronic engine control unit ECU (). Modules of this type are also called controller. The gasoline or diesel engine, as well as other vehicle systems, are controlled by special control units. There are several types of them and they all have their own connection scheme to the on-board electronics.
The electronic engine control unit maintains a constant and continuous exchange of data with control modules of other systems. Data streams are transmitted via a special CAN bus. Through this bus, an effective integration of all electronic-digital systems of the car is implemented, which ultimately represents a single on-board network. The following is a guide to all the most common ECUs.
Pinout of the VAZ ECU connectors January
Scheme January 5.1
Scheme January 7.2
Pinout January 7, BOSCH M7.9.7, M 73
| № | 8V | 16V | № | 8V | 16V | |
| 1 | Cat. ignition 2 c. | 42 | Rough road sensor input (3) | |||
| 2 | Ignition cat. 2-3 c. | Cat. ignition 3 c. | 43 | |||
| 3 | Weight cat. lit. | Weight cat. lit. | 44 | |||
| 4 | Cat. ignition 4 c. | 45 | Phase sensor power output (2) | |||
| 5 | Ignition cat 1-4 c | Cat. ignition 1 c. | 46 | Canister valve control output (1) | ||
| 6 | Nozzle 2 | 47 | Nozzle 4 | |||
| 7 | Nozzle 3 | 48 | DK1 heater control (D) | |||
| 8 | Tachometer output | 49 | ||||
| 9 | 50 | Auxiliary starter relay control | ||||
| 10 | Fuel consumption signal | 51 | Weight | |||
| 11 | 52 | |||||
| 12 | Power supply +12 V. Battery (replacement ignition 30 pin.) | 53 | Weight | |||
| 13 | +12 V. Ignition (replacement ignition 15 pin.) | 54 | ||||
| 14 | Main relay control output | 55 | Oxygen sensor signal input 2 (A) | |||
| 15 | Crankshaft sensor input (A) | 56 | ||||
| 16 | Throttle sensor signal input (C) | 57 | Switching calibrations, short to ground | |||
| 17 | Throttle sensor ground (V) | 58 | ||||
| 18 | Oxygen sensor signal input 1 (A) | 59 | Speed sensor signal input.(2) | |||
| 19 | Knock sensor input (1) | 60 | ||||
| 20 | Ground knock sensor (2) | 61 | Weight | |||
| 21 | 62 | |||||
| 22 | 63 | Power input +12V after the main relay | ||||
| 23 | 64 | Idle Air Control (D) | ||||
| 24 | 65 | Idle Air Control (C) | ||||
| 25 | 66 | Idle Air Control (B) | ||||
| 26 | 67 | Idle Air Control (A) | ||||
| 27 | Nozzle 1 | 68 | Fan relay control output 1 O.Zh. | |||
| 28 | Oxygen sensor heater 2 (D) | 69 | Air conditioning relay control output | |||
| 29 | Fan control output 2 | 70 | Fuel pump relay control output | |||
| 30 | 71 | K line | ||||
| 31 | Lamp Check | 72 | ||||
| 32 | Power output +5V DPDZ(3),DND(1) | 73 | ||||
| 33 | Power output + 5V DMRV (4) | 74 | ||||
| 34 | Crankshaft sensor signal input (1) | 75 | Air conditioning request signal | |||
| 35 | Mass of sensors. | 76 | Request to turn on the power steering. | |||
| 36 | Mass of sensors. | 77 | ||||
| 37 | Air mass sensor signal input (5) | 78 | ||||
| 38 | 79 | Phase sensor signal input (3) | ||||
| 39 | Coolant sensor input (2) | 80 | Weight | |||
| 40 | Signal input. DTVV. (DMRV pin. 1) | 81 | ||||
| 41 | ||||||
Connecting the K-line adapter
Pinout of the connectors of the VAZ Bosch ECU
Bosch 7.9.7 January 7.2
| Number | Bosch M1.5.4 (1411020 and 1411020-70) January 5.1.1 (71) |
Bosch M1.5.4 (40/60) January-5.1 (41/61) January 5.1.2 (71) |
Bosch MP7.0 |
| 1 | Ignition 1-4 cylinders. | Ignition 1-4 cylinders. | Ignition 1-4 cylinders. |
| 2 | . | Bulk ignition wire. | . |
| 3 | Fuel pump relay | Fuel pump relay | Fuel pump relay |
| 4 | Stepper motor PXX(A) | Stepper motor PXX(A) | Stepper motor PXX(A) |
| 5 | Canister purge valve. | Canister purge valve. | |
| 6 | Cooling Fan Relay | Left fan relay (Niva only) | |
| 7 | Air flow sensor input | Air flow sensor input | |
| 8 | . | Phase sensor input | Phase sensor input |
| 9 | Speed sensor | Speed sensor | Speed sensor |
| 10 | . | General. Weight of the oxygen sensor | Weight of the oxygen sensor |
| 11 | Knock sensor | Knock sensor | Knock sensor input 1 |
| 12 | Sensor power supply. +5 | Sensor power supply. +5 | Sensor power supply. +5 |
| 13 | L line | L line | L line |
| 14 | Mass of nozzles | Mass of nozzles | mass of injectors. Power "earth" |
| 15 | Nozzle control 1-4 | Oxygen Sensor Heater | Check Engine Lamp |
| 16 | . | Nozzle 2 | Nozzle 3 |
| 17 | . | recirculation valve | Nozzle 1 |
| 18 | Power supply +12V non-switchable | Power supply +12V non-switchable | Power supply +12V non-switchable |
| 19 | Common wire. Mass of electronics | Common wire. Mass of electronics | |
| 20 | Ignition 2-3 cylinders | Ignition 2-3 cylinders | |
| 21 | Stepper motor PXX(C) | Stepper motor PXX(C) | Ignition 2-3 cylinders |
| 22 | Check Engine Lamp | Check Engine Lamp | Stepper motor PXX(B) |
| 23 | . | Nozzle 1 | A/C relay |
| 24 | Stepper motor weight | Mass of stepper motor output stages | Power ground |
| 25 | A/C relay | A/C relay | . |
| 26 | Stepper motor PXX(B) | Stepper motor PXX(B) | Mass of sensors DPDZ, DTOZH, DMR |
| 27 | Terminal 15 ignition switch | Terminal 15 ignition switch | Terminal 15 ignition switch |
| 28 | . | Oxygen sensor input | |
| 29 | Stepper motor PXX(D) | Stepper motor PXX(D) | Oxygen sensor input 2 |
| 30 | Mass of sensors DMRV, DTOZH, DPDZ, DD, DPKV | Knock sensor input 2 | |
| 31 | . | Reserve output high current | Rough road sensor input |
| 32 | . | . | Fuel consumption signal |
| 33 | Nozzle control 2-3 | Oxygen sensor heater. | . |
| 34 | . | Nozzle 4 | Nozzle 4 |
| 35 | . | Nozzle 3 | Nozzle 2 |
| 36 | . | Exit. Inlet pipe length control valve. | Main relay |
| 37 | Nutrition. +12V after main relay | Nutrition. +12V after main relay | |
| 38 | . | Reserve low current output | . |
| 39 | . | . | Stepper motor IAC (C) |
| 40 | . | Reserve input discrete high | . |
| 41 | Request to turn on the air conditioner | Oxygen sensor heater 2 | |
| 42 | . | . | |
| 43 | Tachometer signal | Tachometer signal | Tachometer signal |
| 44 | CO - potentiometer | Air temperature sensor | . |
| 45 | coolant temperature sensor | coolant temperature sensor | |
| 46 | Main relay | Main relay | Cooling Fan Relay |
| 47 | Programming permission | Programming permission | Air conditioning request signal input |
| 48 | crankshaft position sensor. Low level | crankshaft position sensor. Low level | |
| 49 | Crankshaft Position Sensor High | Crankshaft Position Sensor High | |
| 50 | . | Recirculation valve position sensor | Programming permission |
| 51 | . | Power steering request | DC heater |
| 52 | . | Reserve input discrete low | . |
| 53 | Throttle position sensor | Throttle position sensor | |
| 54 | Fuel consumption signal | Fuel consumption signal | IAC stepper motor (D) |
| 55 | K line | K line | K line |
Modifications of electronic control units for VAZ cars
Modification of the seventh of January depends on the engine size. BOSCH production control units were mounted only on those cars that were exported (they met the EURO-3 eco-standard). For 1.5l 8 cells. the motors were equipped with the following ECUs:
| 21114-1411020-80 | BOSCH-7.9.7, E-2.1.5 liters, 1st production version. |
| 21114-1411020-80h | BOSCH-7.9.7, E-2.1.5 liter, tuning |
| 21114-1411020-80 | BOSCH-7.9.7+, E-2.1.5 liter, |
| 21114-1411020-80 | BOSCH-7.9.7+, E-2.1.5 liter, |
| 21114-1411020-30 | BOSCH-7.9.7, E-3.1.5 liter, 1st serial version. |
| 21114-1411020-81 | JANUARY_7.2, E-2.1.5 liter, 1st_serial version failed, replacement_A203EL36 |
| 21114-1411020-81 | JANUARY_7.2, E-2.1.5 liter, 2nd_serial_version. failed, replacement_A203EL36 |
| 21114-1411020-81 | JANUARY_7.2, E-2.1.5 liter, 3rd_serial_version |
| 21114-1411020-82 | ITELMA, with acid sensor, E-2.1.5 liter, 1st_version |
| 21114-1411020-82 | ITELMA, with acid sensor, E-2.1.5 liter, 2nd_version |
| 21114-1411020-82 | ITELMA, with acid sensor, E-2.1.5 liter, 3rd_version |
| 21114-1411020-80h | BOSCH_797, without acid sensor, E-2, din., 1.5 liters |
| 21114-1411020-81h | JANUARY_7.2, without acid sensor, CO, 1.5 liter |
| 21114-1411020-82h | ITELMA, without acid sensor, CO, 1.5 liter |
For 1.6 liter engines:
| 21114-1411020-30 | BOSCH_797,E-2,1.6L,1st_series (software glitches) |
| 21114-1411020-30 | BOSCH_797,E-2,1.6L,2nd_series |
| 21114-1411020-30 | BOSCH_797+,E-2,1.6L,1st_series |
| 21114-1411020-30 | BOSCH_797+,E-2,1.6L,2nd_series |
| 21114-1411020-20 | BOSCH_797+,E-3,1.6L,1st_series |
| 21114-1411020-10 | BOSCH_797,E-3,1.6L,1st_series |
| 21114-1411020-40 | BOSCH_797,E-2,1.6L |
| 21114-1411020-31 | JANUARY_7.2, E-2, 1.6L, 1st_series (unsuccessful) |
| 21114-1411020-31 | JANUARY_7.2, E-2, 1.6L, 2nd_series |
| 21114-1411020-31 | JANUARY_7.2, E-2, 1.6L, 3rd_series |
| 21114-1411020-31 | JANUARY_7.2+, E-2, 1.6L, 1st_series, new_device.version. |
| 21114-1411020-32 | ITELMA_7.2, E-2, 1.6L, 1st_series |
| 21114-1411020-32 | ITELMA_7.2, E-2, 1.6L, 2nd_series |
| 21114-1411020-32 | ITELMA_7.2, E-2, 1.6L, 3rd_series |
| 21114-1411020-32 | ITELMA_7.2+, E-2, 1.6L, 1st_series, new_hardware version. |
| 21114-1411020-30H | BOSCH_with oxygen sensor, Е-2, din, 1,6L |
| 21114-1411020-31Ch | JANUARY_7.2, without acid sensor, CO, 1.6 liter |
The location of the computer in VAZ cars
Ford ECU Pinout Diagram
Diagrams of other connectors of electronic control units
Renix ECU
ECU 2LT-E, KZN165, KZJ90
ECU Passat
Progress electronic control unit
Mitsubishi ECU
Nissan ECU
