Where is the ECU located for VAZ 2110 and 2112 (8 and 16 valves), malfunctions and replacement of the ESD controller

01/26/2022 11 124 VAZ 2110

Author: Ivan Baranov

The ECU is the main control module in any car. Thanks to the control unit, the optimal parameters for the operation of the power unit are determined, so this module must always work exactly like a clock. Where is the VAZ 2110 ECU located, what malfunctions are typical for it and how to change the device if necessary - we will talk about this below.

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Description of "brains"

The VAZ 2110 is considered the first vehicle in the domestic automobile industry equipped with an injection engine.
The power unit is controlled by an ECU, an electronic device that determines the basic parameters of engine operation in accordance with sensor signals. In fact, the ECU of a VAZ 2110, VAZ 2112 or any other model is the “brains” of the car, the operation of which affects the functionality of the vehicle as a whole. Control controller in VAZ 2110

In the “Tens”, as well as the VAZ 2112, there are 16 valves and other models equipped with BOSCH 7.9.7 or January 7.2 systems, one M6 screw is installed in the head. From this screw the mass is taken to the ignition coils, and the mass is taken directly to the control model in the cabin. Typically, the mass is a welded stud mounted on the ECM bracket, particularly behind the center console, behind the left screen. In this case, the mass is transferred to the bracket through a pin, which is welded on the engine shield in the middle. It should also be noted that the nut on this stud is not usually tightened.

Control unit location

Now let's consider the location of the VAZ 2110 ECU. This device in the Ten is located under the center console, in its lower part, in particular, under the control panel. In order to gain access to the control module, you must remove the plastic panel on the passenger side, to do this you will have to use a Phillips screwdriver. Once you remove the cover, you will see many different wires, plugs, and safety devices. The controller itself is located behind them, it is screwed to the bar in a horizontal position.

The arrow indicates the location of the ECM module behind the center console

Electrical diagram of VAZ-2112

Designations: 1 – Headlight, 2 – Klaxon, 3 – Main radiator fan, 4 – Starter, 5 – Battery, 6 – Generator 2112, 7 – Gearbox limit switch (reverse), 8 – Actuator in the front passenger door, 9 – Power window enable relay, 10 – Starter relay, 11 – Heater fan, 12 – Electric heater partition drive, 13 – Main pump, 14 – Washer reservoir sensor, 15 – Driver’s door actuator, 16 – Front passenger window selector, 17 – Unlock button fifth door, 18 – Heater fan resistance unit, 19 – Main wiper motor, 20 – Driver’s window lift selector, 21 – Front passenger’s window lift motor, 22 – Central locking, 23 – Exterior light switch, 24 – Brake fluid leakage sensor, 25 – Pump additional, 26 – Driver's window lift motor, 27 – PTF on indicator, 28 – PTF switch, 29 – Dashboard, 30 – Heated glass on indicator, 31 – Heated glass switch, 32 – Steering column selector switch, 33 – PTF relay, 34 – Ignition switch, 35 – Main fuse block, 36 – Illumination of heater controls, 37 – Hazard warning button, 38 – Heater control controller, 39 – Glove compartment lighting, 40 – Glove compartment lid end cap, 41 – Cigarette lighter, 42 – BSK – display unit, 43 – Ashtray illumination, 44 – 12V socket, 45 – Instrument lighting switch, 46 – Actuator in the right rear door, 47 – Right rear passenger window selector, 48 – Clock, 49 – Right rear passenger window motor, 50 – Brake limit switch (closed – pedal is pressed), 51 – Left rear passenger window motor, 52 – Left rear passenger window selector, 53 – Actuator in the left rear door, 54 – Turn signal, 55 – Handbrake limit switch (closed – handbrake on), 56 – Rear wiper motor , 57 – Navigator's lamp, 58 – Interior lamp, 59 – Temperature sensor in the heater, 60 – Limit switch for the open front door, 61 – Limit switch for the open rear door, 62 – Trunk light, 63 – Rear optics (on the body), 64 – Rear optics (on the fifth door), 65 – License plate illumination.

The letters indicate the terminals to which it is connected: A – Front speaker on the right, B – Radio, C – Injector harness, D – ESD diagnostic connector, D – Front left speaker, E – Diagnostic connector for the heater controller, G – Rear right speaker, W – Rear left speaker, I – BC connector, K – glass heater thread, L – fifth door actuator, M – Additional brake light.

Wiring diagram VAZ-2112 injector 16 valves - full view

Signs of the need for internal combustion engine repair

The reasons why the operation of the engine is disrupted are arranged in a small list, starting with refusal to start and ending with floating idle speed (this problem was removed on the 127 “engine”). Not all breakdowns end in capital damage - sometimes it’s enough to add oil, sometimes it’s enough to adjust the ECU settings.

Compression reduction

A decrease in cylinder compression below 16 atmospheres is a bad sign. Such a high limit corresponds to a compression ratio of 11.

Knocks in the engine

Engine knocks can come from several points. These could be hydraulic compressors, timing belt rollers or pins. The knocking noise could also be caused by low oil level. The answer to the question will be given by a thorough detailed inspection of all parts of the unit and checking the oil level.

Blue smoke from the exhaust pipe

The blue smoke that comes from the exhaust pipe appears when oil enters the combustion chamber. It can leak either from the valves or from under the piston. The result is the same: the oil is eaten up and blue smoke pours out of the chimney. Once the leak is located, half the problem will already be solved.

Troit motor

Sometimes in the cold the engine may stall - don’t be alarmed by this, because it may simply be one of the spark plugs that fails. In this case, we advise you to simply restart the engine and it will stop running.

How much does it cost to overhaul a Priora engine - average price

Self-repair of a Priora engine with 16 valves costs an average of 16-20 thousand rubles. The cost depends on the severity of the breakdown and may be lower or higher than this average range. Repairing a Priora engine can be entrusted to the wrong hands, but then you will have to pay for the work - sometimes the cost of repairs reaches as much as 40 thousand rubles.

This is an unreasonably inflated figure, because, as practice shows, you can rebuild the engine on a Priora, working at a moderate pace, in just three days - and three days of work is definitely not worth that kind of money. Don’t be afraid of not being able to cope - your Lada is easy to repair, and using the advice and “tutorials”, you will conquer even such a task that is impossible at first glance.

Benefits of tuning

The main advantage of this tuning is the ability to improve the performance characteristics of the car without interfering with the engine itself. There is no need to change the head, install different pistons or spider. It is enough to install a different firmware on the VAZ, then the car will become more responsive to the accelerator pedal. The next plus is the speed of installation. Upgrading the VAZ-2114 firmware will take no more than twenty minutes of time. In this case, you can always return the ECU to its factory settings.

Another advantage of the control unit firmware is the removal of engine errors. They can occur when the catalyst is removed or the oxygen sensor is faulty. Since many VAZ-2114 owners install a flame arrester instead of a catalyst, the “Check” is constantly lit on the instrument panel. With the new firmware, “Check” will not bother the owner. And with computer diagnostics there will be no errors in the exhaust system.

There are many programs for flashing VAZ firmware. One will allow you to achieve maximum fuel efficiency. The other will improve dynamic performance. The third will allow the 16-valve engine to run on 92 gasoline without detonation and overconsumption.

How it works?

The main executive element of the control unit is a microprocessor; it processes the received information, makes calculations and issues commands, adjusting the operation of all systems. The processor is guided by an embedded microprogram, which clearly defines all scenarios for the operation of the motor and all its systems “for all occasions.”

The ECU receives information from the following sensors:

Oxygen sensor (lambda probe);
MAF (mass air flow sensor);
DPKV (crankshaft position sensor);
TPS (throttle position sensor);
DTOZH (coolant temperature sensor);
Fan switch sensor;
Knock sensor;
Speed sensor;
Exhaust valve.

The received data is processed, after which the operation of the motor or its individual systems is adjusted. So, based on certain needs, the following can be adjusted:

In addition, the ECU is related to and also receives information from systems such as ABS, ESP, airbags and passive safety systems, as well as the anti-theft system.

In addition to the microprocessor, the ECU has other modules

RAM – Random Access Memory or, more simply, random access memory. Any changes in the operation of the motor and each malfunction will be recorded and stored in RAM memory. Errors are stored until you turn off the ignition. After this, the RAM is reset until you start the engine again. After starting the engine, self-diagnosis of all systems occurs, sensors send information about the state of things in certain nodes, the ECU analyzes the received data and, based on its own algorithms, makes a decision whether everything is good or not. If some data does not correspond to the concept of “norm,” an error is generated and recorded in memory, and the driver receives a warning on the instrument panel. Typically, this is either a “Check Engine” or another indicator that lights up on the dashboard.

PROM - Programmable Read Only Memory - is an analogue of RAM, the only difference is that this memory stores the ECU microprogram (firmware) and a set of necessary engine control algorithms. This type of memory is not reset, it is a kind of “hard drive” if translated into a computer. terminology Correcting this microprogram will allow you to change or reconfigure the operation of some systems and engine performance as a whole; this is popularly called “brain rewiring”.

EPROM is an electrically reprogrammable read-only memory device. This module contains secret access codes and various passwords that ensure the security of the car. Each time the engine is started, a set of passwords and codes are compared with the passwords in the immobilizer, if everything is “ok” the engine starts.

What kind of ECUs are installed on the VAZ 2110

Earlier I already talked about what kind of ECUs are installed on the VAZ 2114, if you are interested, read this article! So, dozens of electronic control units are installed with similar ones.

January 4 – technical specifications for which VAZ 2110 models are installed

One of the most common ECUs installed on the VAZ 2110 is January 4.

Structural management system January 4

January 4 was installed on the first generation VAZ 2110 model of 1999. Of course, this is not the most advanced ECU for a VAZ, but it still has a number of advantages, which I will talk about later.

Bosch M1.5.4 - advantages and disadvantages of use in the VAZ 2110

For Euro-2 toxicity standards, new modifications of block M1.5.4 appear (has an unofficial index “N”, to create an artificial difference) 2111-1411020-60 and 2112-1411020-40, satisfying these standards and incorporating an oxygen sensor, catalytic neutralizer and adsorber.

ECU Bosch M1.5.4

Also, for Russian standards, an ECM was developed for 8-class. engine (2111-1411020-70), which is a modification of the very first ECM 2111-1411020. All modifications, except the very first, use a wideband knock sensor. This unit began to be produced in a new design - a lightweight, leak-proof stamped body with an embossed inscription “MOTRONIC” (popularly “tin can”). Subsequently, ECU 2112-1411020-40 also began to be produced in this design. Replacing the structure, in my opinion, is completely unjustified - sealed blocks were more reliable. New modifications most likely have differences in the circuit diagram towards simplification, since the detonation channel in them works less correctly, the “tins” “ring” more when using the same software.

January-5 – description and technical characteristics of the VAZ 2110 ECU

In parallel with the M1.5.4 system, AvtoVAZ, together with ELKAR, designed a functional analogue of the M1.5.4 block, which was called January-5.” Initially, versions were released for Euro-2 standards (2112-1411020-41) containing an oxygen sensor, catalytic converter and adsorber. Later, mass production and installation of systems based on control units began:

“January-5.1.2” for 16 (2112-1411020-71).
“January-5.1.1” for 8 (2111-1411020-71) valve engines.

All these units have software and calibrations developed by AvtoVAZ OJSC. For classic cars, the January 5.1.3 2104-1411020-01 modification is used in the Euro-2 configuration, without a knock sensor.

ECU VAZ 2110 January 5.1

It differs from version 5.1 only in the unsoldered elements of the detonation channel. In December 2005, NPP Avtel released for spare parts (this was never supplied to the VAZ conveyor!!!) ECU “January 5.1.x” with modified hardware.

ECU VAZ 2110 BOSCH MP7.0H

The next generation of ECUs for VAZ cars was Bosch MP 7.0. In this modification, both the hardware and software were developed by Bosch, the final calibration and fine-tuning of the systems was carried out by AvtoVAZ OJSC. This family is also expanding and has already been supplemented with systems meeting Euro-3 standards for 8 and 16-valve engines of front-wheel drive vehicles, as well as for all-wheel drive vehicles VAZ-21214 and VAZ-2123 (Euro-2 and Euro-3 standards).

A FLASH chip with a capacity of 256 Kb is used as ROM in these blocks, of which only 32 Kb contain calibration tables and can be read and rewritten. More precisely, you can write all 256 KB, but only read 32 KB. Reading/writing of these blocks (without opening the blocks) is supported only by Combiloader from SMS-Software. It is also possible to program the flash with an external programmer via an adapter connected to the ECU bus.

ECU VAZ 2110 BOSCH MP7.0H

This ECU uses a 16-bit B58590 processor (internal marking from Bosch), a 20-bit bus and 29F200 flash memory is used as ROM for storing software and calibrations. ECUs of different modifications differ in hardware. The ECU for E3 (-50) standards has an additional driver for the heater of the 2nd oxygen sensor. There may also be differences in the DTV channel. A beautiful paper sticker (there are such things), on top of the standard nameplate - most likely the brainchild of OPP, such blocks were installed on some Niva and Nadezhda cars, converted to OPP from ordinary Niva ones. This type of ECU supports non-disabled driver diagnostics. Therefore, when installing gas equipment on them, it is strictly necessary to use continuous shutdown of the injectors.

VAZ injection models: ECU, controller purpose and features

So, the injector, which is actually represented by electronic-mechanical injectors, cannot dose fuel on its own. The engine control unit is responsible for the correct operation of the injectors. In turn, this unit is actually the electronic engine control system (ECM).

So, the ECU receives signals from a large number of sensors, after which, using algorithms “hardwired” into the unit’s memory, the amount of fuel required for the engine to operate in optimal mode is calculated. The ECU also controls the moment of spark formation in the cylinders, replacing the ignition system on a car with a carburetor.

The ECU also conducts self-diagnosis and checks the condition of the engine, recording failures, deviations and irregularities in operation. If the controller cannot correct the situation, then an error is recorded in the memory, and the driver receives a notification in the form of a “check” icon on the instrument panel.

As for the sensors, thanks to their presence, the ECU determines the engine operating mode, speed, and load on the internal combustion engine. For example, the MAF (mass air flow sensor) allows you to obtain data to calculate the amount of fuel, taking into account the amount of air entering the cylinders.

DT (the temperature sensor determines the temperature of the internal combustion engine, thereby indicating how the fuel will burn in a cold and warm engine). TPS (throttle position sensor) shows how hard the gas pedal is pressed.

If fuel combustion becomes explosive, the explosion is detected by the engine knock sensor (DE). The control unit adjusts the mixture and changes the ignition angle to avoid detonation. If the ECU cannot solve the problem, the “check” lights up and the error is recorded in the ECU’s memory.

Even on later VAZ models, the VAZ controllers and firmware themselves changed, since oxygen sensors paired with a catalyst were used in the design. These sensors determine the efficiency of fuel combustion by recording the amount of oxygen in the exhaust. So, for this reason, you need to take into account that ECUs of different generations are different.

For example, older versions did not have support for a phase sensor (DPRV); injection took place into the intake manifold, and not into each cylinder individually. These ECUs are the central injection control unit. Later, blocks appeared that prepared the mixture for each individual cylinder (distributed injection ECU).

Subsequently, support for an oxygen sensor was implemented, then two oxygen sensors (taking into account stricter toxicity standards) for more efficient use of the catalytic converter.

This means that Kalin’s brains cannot be used as a replacement for the Priora ECU, although one and the other unit will be VAZ ECUs. It turns out that it is important to know which unit is installed on a particular car. To determine this, you need to understand where the VAZ ECU is located, and then study the markings on the device. Let's figure it out.

Video “No spark and blown fuse - repairing the ECU”

What to do if there is no spark and the fuses are constantly blowing - the video below shows the process of repairing the control controller in a garage (the author of the video is the Auto Practice channel).

I came across an article by McSystem. Actually, here it is below

In January - about Januarys. Again and in detail about the ECM-ECU masses

One of the rather serious problems affecting the stable operation of engines controlled by the January ECU (7.2, 7.2+, M73, 7.9.7) is the “mass problem” of the ECM. Moreover, the point is not so much in bad (or uncrimped) contacts and their fastenings, but rather in the rather incorrect wiring of the ECM harness itself. And the solution is not in “pulling a fancy cable (KG-25 or 50)” to the ECU. Therefore, this material will be devoted to a technically competent approach to solving this problem. What is described below is a kind of compilation, or an attempt to “chew” what has been published more than once, in particular on ChipTuner.ru, and to convey to readers the specifics of solving this problem. The articles by I.N. turned out to be the most complete and informative. Skrydlova, (aka Aktuator) “About the masses”, “MASS: AN UNEXHAUSTABLE SOURCE OF GLITCHES” “ONCE AGAIN ABOUT THE MASSES” Oleg Bratkov. Many years ago, having read and comprehended what was written, I implemented it on my typewriter. I completely agree with the conclusion of the author (aka Aktuator): “All the assurances of AVTOVAZ OJSC about improving the quality of electrical connections in manufactured vehicles are not worth a penny. In most cases, it is possible to achieve normal operation of the engine under the control of the ECM I 7.9.7 and January 7.2 only by carrying out additional, and not accepted by the manufacturer as a warranty, work to change the electrical circuit of the car.”

So, on to the topic! Classic ECM 21124 with ECU January 7.2(+) or M7.9.7 Electrical connection diagram of ECM EURO-2 M7.9.7, January 7.2 LADA 2110 with engine 21124. 21124-1411020-30, 21124-1411020-31.32

Fig. 1 ECM 21124 January 7.2, M7.9.7 Noticed, often described and characteristic problems - unstable idle speed, freezing speed, “jerking” of the engine at start and operation of the cooling fan, unreasonable jumps in the electrical parameters of the ECM during diagnostics. And this is not the entire list. And the whole problem is a rather incorrect wiring of the harness masses, not in relation to the body, but to the ECU. Therefore, in this article you will not see recommendations for tightening the “hoses” of additional mass to the ECU, due to its complete uselessness. This is not a newfangled “razmasovka” or “razminusovka”... Don’t get your hopes up!

The main idea voiced by the authors is that the wiring of the power lines of the ECU and fan and low-current sensor masses is fundamentally incorrect. Rice. 12

Fig.2 Ground connections of the ECM. S6, S7, S8

The sensors must be connected to the ground bus of the ECU board and not have contact with the body! There should be no flow of pulsed and direct currents of the ECU and IM in the sensor mass circuit. And the ECU is securely connected to the body. The rationale is to eliminate the influence of ECU currents (pulse and constant) and fan current on the reliability of sensor readings. Classic approach with data collection and processing systems! But not from AvtoVAZ designers, as usual... Now, in order

Fig. 3 Masses according to AvtoVAZ, or how not to do it

1. The ECU masses are combined into three crimps S6, S7, S8, which are combined with each other and TWO bends are already made from them to the body studs B3, B4. 2. A switched minus fan with a rated current of 12A is connected to S6, and at the peak at start - all 20A! ! ! Which in itself is terrible! 3. All this is connected (screwed) to the ECU bracket, which in turn is very flimsily connected to the body. The engine ECM consists of sensors and actuators (AM). Sensors can be easily divided into analog and discrete. Analogue – mass air flow sensor, air pressure sensor, diesel sensor, DD. The output signal of these sensors is a voltage in a certain small range, usually 0 - 5V. For this group, any (even small) interference has a serious impact on the result. Discrete ones - DC (to some approximation), DF, DS (Speed Sensor) - are less critical to interference, because the output signal has two fixed levels high and low, and intermediate levels are not interesting to the ECU. Actuators - ignition coils, injectors, canister valve, DC heating, IAC, relays and other sources of large pulsed and direct currents along the negative (mass) bus of the ECU. To understand what the developers were up to, let’s look at the diagram in Fig. 3 – this is a fragment of the main ECM diagram in expanded form. It immediately catches your eye - the masses of the most sensitive and responsible sensors, mass air flow sensors and diesel fuel sensors, are wired, although there are separate pins for them, 36 and 35, respectively. For what? Silence in response! S6-S7-S8 are connected by jumpers, which makes the situation even worse.

How to remove the ECU on a Lada Kalina - step-by-step instructions

In order to remove the ECU unit on a Lada Kalina, you must perform the following procedure:

First you need to unscrew 2 screws, the location of the first is shown by the arrow. The second is at the same level on the engine side. Before doing this, you must remember to remove the terminal from the battery. After unscrewing the screws, do you need to pull the block towards the passenger door? and he must leave from there along the guides. Sometimes it happens that the wires rest against the carpet. Then they need to be corrected.
In order to remove the connector and disconnect the unit from the wires, you first need to: pull the connector lock to the side. The latch is a bracket. I think you can easily find it on the connector.

Self-diagnosis systems

Like any computer, the Priora ECU has feedback from the user.

The driver learns about problems using signal codes, which can be seen in two ways: using an additional on-board computer connected to the diagnostic connector, and on the instrument panel after performing simple manipulations.

For self-diagnosis, you can install the following devices:

State X 1 P Priora. A small device that is inserted in place of a standard button. Has an LED display with 3 characters. In addition to the diagnostic function using 30 parameters, it allows you to warm up the spark plugs during cold periods, independently regulate the temperature at which the cooling system fan turns on, and reset engine errors.
Priora State Matrix. A more serious on-board computer. It is placed in place of the standard clock and has a graphic display of 128 x 32 pixels.

In addition to the functions listed on the previous computer, the device can work with gas equipment, reading gas consumption. The “Afterburner” function allows you not only to reset engine errors, but also to roll back the controller to its factory state, thereby resuscitating it. After activating this option, the “Priors” ECU mode will turn on, which was set at the factory. This bookmaker also has the ability to update the software.

Multitronics C-900. Universal on-board computer. Can be installed in different places. It has enormous capabilities both in diagnostics and adjustments. Suitable for a wide range of cars. It has a 480 x 800 pixel LCD display and the ability to change settings directly from your home PC.

Basic malfunctions of the ignition module 2110

Despite the fact that the ignition module on the 2110 is a fairly reliable device, the element can still fail. The most common causes of breakdowns identified during diagnosis in almost 90% of cases are:

Using components that do not meet the parameters. These could be high-voltage wires that do not match the parameters of the module, spark plugs that can damage the ignition module itself (a large charge can break the coil), etc.
Parts with factory defects or poor quality assembly. As a result, failure of other elements of the ignition system.

If the ignition module does not perform its functions, this is reflected in the performance of the vehicle’s internal combustion engine:

increased fuel consumption;
the engine stops starting;
during acceleration (sharp change in speed), dips appear;
unstable operation of the internal combustion engine (two cylinders do not work);
After the engine warms up, there is a noticeable drop in power and thrust.

Typical malfunctions: their symptoms and causes

If the electronic engine management system malfunctions, this can lead to problems with the operation of the power unit. Unfortunately, ECU malfunctions in dozens of domestic cars are not uncommon, so the car owner should be aware of the main problems, as well as the reasons for their occurrence.

First, let's look at the symptoms of malfunctions:

There is no connection with the diagnostic tester. If problems begin to appear in the operation of the engine, the car owner can diagnose the performance of the power unit using a tester or laptop. But if the ECU does not work, then when trying to contact the on-board computer, the car owner will see that there is no connection.
The ECM does not receive signals about the operation of the injectors, ignition system, fuel pump, valve or idle speed sensor. There may also be no signals from other actuators.
Another sign is the lack of response to the oxygen sensor, engine temperature controller, throttle position sensor and other controllers.
Mechanical damage to the device can also be a sign of failure. Cracks may appear on the case as a result of strong mechanical impact; radio elements or conductors could burn out (the author of the video about the repair is Pavel Ksenon).

As for the reasons, malfunctions in the electronic control unit can occur as a result of:

Unskilled intervention. This reason is one of the most common. If a car owner independently carries out electrical repairs or installs an anti-theft system, or entrusts this work to unqualified craftsmen, errors may be made in the process. A common problem is lighting a car battery from a vehicle with the engine running.

When lighting the engine, the engines of both cars must be turned off, otherwise there is a risk of brain damage, this is important to remember. Another problem that does not occur so often is polarity confusion when connecting a car battery. If you confuse plus with minus, it can not only damage the control unit, but also damage the battery itself, which can lead to expensive repairs. The reason may be that the battery terminals are disconnected while the engine is running. Also, the control unit may fail as a result of turning on the starter unit with the power bus disconnected. The engine control system can be damaged if an electrode accidentally hits the sensor or vehicle wiring during welding work. One of the most serious problems is water getting into the ECU.

If liquid gets into the device, the board itself may become covered. A break in the electrical circuit or a short circuit in the wiring. The cause may also be malfunctions in the high-voltage component of the ignition system. For example, a breakdown of the ECU can be caused by a failure of the coil, high-voltage cables, distribution mechanism, etc.

What is an ECU (brains)

The ECU - or electronic control unit on the VAZ-2112 - is the main element that is responsible for the entire cycle of transferring fuel to the engine combustion chamber system, as well as controlling its operation as a whole.

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About the expert:

Fan-auto

All my life I have been surrounded by cars! First, in the village, already in the first grade, I was rushing around on a tractor through the fields, then there was JAVA, then a penny. Now I am a third-year student at the Polytechnic Faculty of Automotive Engineering. I work part-time as a car mechanic and help repair cars for all my friends.

Below we will tell you how to find this part in the car and replace it.

ECU VAZ 2114-2115: main functions, features, malfunctions

The Electronic Engine Control Unit (ECU, “brains”) is the brain center of any engine, which contains a set of microprograms and algorithms necessary for the proper operation of the engine and all its systems.

A large number of sensors located throughout the car take readings from certain devices and transmit them to the ECU, after which the “brains” correct the operation of a particular system.

In this article I will talk about the VAZ 2114-2115 ECU; you will learn about the main functions, features, as well as common malfunctions of this unit.

Significant features of Lada Priora engine tuning

The main feature of chip tuning for a Lada Priora car is that it can be used to improve certain engine characteristics without the need to disassemble it.

Engine chip tuning can only be done if the car has a special electronic control unit that controls the operation of the engine system. It looks like a kind of automobile-type computer that controls the operation of the engine. The main tasks of the control unit are to provide signals to turbocharging systems, fuel injection devices and ignition systems. The computer receives this information from special sensors that determine fuel consumption, speed and other parameters.

This device has a special chip with a microcircuit on it containing programs that control the motor system. Some changes may be made to the microcircuit regarding operating parameters: marking ignition timing, amount of fuel in the cylinders, controlling the level of exhaust toxicity, etc.

Connection to diagnostic motor

The chip tuning process is carried out in two ways. The first involves dismantling an existing chip and reprogramming it after removal. After this, the chip is installed in its original place. The second way is to replace the standard microcircuit with a new one with different software.

To improve some technical characteristics of the engine, there are several methods for modifying it. For example, it is possible to increase the power ratings of an atmospheric turbocharged or gasoline power unit. The microcircuit can provide the car with economical characteristics that significantly reduce fuel consumption.

Most of the programs used by Russian manufacturers for the Lada Priora do not meet all the requirements and are rather imperfect. Therefore, individual chip tuning helps eliminate all the shortcomings present in the factory version. The new version of the program has improved algorithms for calculating the fuel mixture and the ignition timing. In addition, improvements have been made to cold start calibration and idle speed control.

Recently, it has been possible to install special systems in a car, with the help of which you can select programs for working with the engine. Their convenience is that the driver can switch the engine system to sport or economical quiet mode at any time.

Engine chip tuning is very useful for the Lada Priora car. It will be appreciated even by those car enthusiasts who do not like a sporty driving style and high speeds. It provides high-quality speed and traction performance, the ability to carry out sharp accelerations of the car when overtaking, and guarantees ease of movement even when the vehicle is heavily loaded.

How does a malfunction of the electronic engine control unit (ECU, ECM, controller) manifest itself?

The most common problems with the electronic engine control unit (ECU, ECM, controller) in a VAZ family car.

An electronic engine control unit, abbreviated as ECU, ECM, controller, is an electronic device that, using various signals from engine sensors, controls the composition and amount of fuel supplied to the engine. Having a built-in diagnostic system, it can recognize problems in the system, warning the driver about them through a warning lamp (Check engine). It also stores diagnostic codes that indicate areas of trouble to help technicians make repairs.

Symptoms of a malfunction of the electronic engine control unit:

— Lack of control signals for injectors, ignition, fuel pump, valve or idle mechanism, and other actuators. - No response to Lambda - regulation, temperature sensor, throttle position sensor, etc. - No communication with the diagnostic tool. — Physical damage (burnt radio elements, conductors).

You can purchase an electronic engine control unit (ECU, ECM, controller) from us!

DON'T STROKE - BUY CHEAPER! ! !

Causes of malfunction of the electronic engine control unit:

1. Unqualified intervention in the car’s electrical system when installing alarms and carrying out repairs. 2. “Lighting up” from a car with the engine running. 3. “Reversal of polarity” when connecting the battery. 4. Removing the battery terminal with the engine running. 5. Turning on the starter with the power bus disconnected; 6. Contact of the electrode during welding work with the sensors or wiring of the vehicle. 7. Water entering the ECM. 8. Broken or shorted wiring. 9. Malfunction of the high-voltage part of the ignition system: coils, wires, distributor

ECU diagnostics involves reading errors recorded in the controller’s memory. Reading is performed using special equipment: PC, cable, etc. via diagnostic K-line. You can also get by with an on-board computer that has the function of reading ECM errors.

The ECU stores diagnostic codes that indicate areas of trouble to assist technicians in making repairs.

If the ECM fails due to a problem in the wiring or actuator, a simple replacement may not give anything other than two, three, etc. burnt blocks.

To find out which controller is on your car, you will have to remove the side frame of the car's instrument panel console. Remember the number of your ECU and find it among the tables presented.

You can purchase an electronic engine control unit (ECU, ECM, controller) from us!

DON'T STROKE - BUY CHEAPER! ! !

The information will also be useful to you: Varieties of electronic engine control systems (ECM, controllers), which are installed on different models of the VAZ family car.

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ECU interchangeability on Lada Kalina

I will give a table of interchangeability of Kalina ECU

. This data was not verified by me personally, but by one authoritative master. The interchangeability of these blocks applies only to blocks with factory firmware (that is, after installation there is no need to reflash the block for your engine and sensors). So, in each line there is a block marking, firmware version and toxicity class.

Bosch 21114-1411020-40 with software B104CR01(02) Euro3 (in my cases it was this one) can be replaced with:
Bosch 21114-1411020-40 with software B102СQ05(CR06) Euro3;
Bosch 11183-1411020-02 with software B101CR01(02) Euro2.

All of the above Bosch blocks can be replaced with domestic Janvr7.2 and 7.2+ blocks.

Domestic blocks are all Euro 2, with the exception of M73 blocks - they are Euro3. January 7.2 and 7.2+ blocks manufactured by Avtel or Itelma (Euro2) for Kalina 1.6l 8V: 7.2 11183-1411020-21(22) with software A(I) 201CO56(57)(58); 7.2+ 11183-1411020-21(22) with software A(I)201CP57. These blocks do not support air conditioning, as I understand it. And, in fact, the M73 blocks, which are suitable for Kalina. These units are all Euro 3: M73 21114-1411020-41 with software A303CE05(CF06) Euro3 (support air conditioning); M73 21114-1411020-42 with software I303CE05(CF06) Euro3 (support air conditioning).

Thus, all of the listed ECUs with Euro3 toxicity class can be changed and can be changed among themselves without hesitation (only if they have factory firmware). It is also possible to replace a block with Euro 3 class with a block with Euro 2 class, but vice versa is not possible. All markings are located on a white plate glued to the ECU cover. Next, I consider it necessary to consider the option of replacing the unit with a used one that was installed on a car with an activated immobilizer, since in this case there is one unpleasant feature.

Instructions for removing and replacing the computer

The need to dismantle the ECM unit 16 of the ten valve engine arises if repairs are necessary when faults are identified. The repair process itself will depend on what exactly happened in the operation of the ECU. For example, if the contacts on the module connector have oxidized, the unit must be dismantled to clean or replace them. If the reason lies in damage to the housing, then the device must be removed for replacement; if water has gotten inside, then the module should be removed in order to dry it. Only after you have dried the block can it be tested.

If the problem lies in the performance of the board and some burnt-out elements, then you can try to repair it yourself by re-soldering some components. But we would still recommend turning to specialists for help, especially if you have never encountered such a problem before (the author of the video about repairing the control controller is Vyacheslav Chistov).

Work sequence

Before dismantling the device, you should disconnect the negative terminal from the car battery:

Do not repair the control unit if you have never had to deal with such a task before!

Tips for use

In order to avoid situations that are associated with the failure of the electronic engine control unit, the following should be done:

Never remove the battery terminals while the engine is running;
Do not remove the battery terminals when the ignition is connected, as this may lead to the destruction of the ECU firmware and communication with the keys; do not disconnect the unit, actuators and sensors when the ignition is connected;
look at the integrity of the wires and harnesses servicing the engine control unit; during the operation of the vehicle, they can be destroyed due to the electrolysis process and cause malfunctions of the device;
if, as a result of an accident or other mechanical action, the ECU develops a crack in the housing, immediately fill it with sealant glue;
do not violate the natural cooling mode of the unit;
Check the serviceability of the sensors only when the connectors are disconnected from the ECU:
do not make transformations to the engine control circuit and use other components and sensors strictly according to equipment catalogs for a specific car model.

See why the car battery boils and what should be done in this case

Is it possible to lubricate the battery terminals and what is the best way to do this?

How to correctly remove the battery https://voditeliauto.ru/poleznaya-informaciya/avtoustrojstva/akb/kak-pravilno-snyat-akkumulyator-s-avtomobilya.html from a car.

Video - installing protection on the Toyota Camry v50 ECU:

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Repair of the Engine Control Unit. ECU block. School of Alexey Pakhomov. Pakhomov download

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