Greetings, dear friends! I decided to devote today’s post entirely to the ECU (Electronic Engine Control Unit) of the VAZ 2114. After reading the article to the end, you will learn the following: what ECU is on the VAZ 2114 and how to find out its firmware version. I will give step-by-step instructions for its pinout, tell you about the popular ECU models January 7.2 and Itelma, and also talk about common errors and malfunctions.
The ECU or Electronic Engine Control Unit of the VAZ 2114 is a unique device that can be described as the brain of a car. Absolutely everything in the car works through this unit - from a small sensor to the engine. And if the device starts to malfunction, then the machine will simply stop, because there is no one to command it, distribute the work of departments, and so on.
Where is the ECU located on the VAZ 2114
In a VAZ 2114 car, the control module is installed under the center console of the car, in particular, in the middle, behind the panel with the radio. To get to the controller, you need to unscrew the latches on the side frame of the console. As for the connection, in Samar modifications with a one and a half liter engine, the mass of the ECU is taken from the power unit housing, from the fastening of the plugs located to the right of the cylinder head.
Location of the VAZ 2114 ECU
In cars equipped with 1.6- and 1.5-liter engines with a new type of ECU, the mass is taken from the welded stud. The pin itself is fixed on the metal body of the control panel near the floor tunnel, not far from the ashtray. During production, VAZ engineers, as a rule, do not securely fix this pin, so over time it can become loose, which will lead to the inoperability of some devices.
Is it possible to install another control module on a car?
Various ECU models are installed on VAZ 2108 - 2115 cars, which belong to the following families:
Each model, even within a family or class, is only suitable for a specific combination of engine, sensors, wiring and firmware. Therefore, even different models within the same family should be installed only after consultation with a specialist in injection systems. Even if different ECU models are equipped with the same electrical connectors, a simple replacement will, at best, lead to poor engine performance.
Source
| Avtel 21114-1411020-11 E-3 | 1st, 2nd and 3rd versions |
| Itelma 21114-1411020-12 E-3 | 1st, 2nd and 3rd versions |
| 11183-1411020-02 Samara | Electronic pedal |
How to find out which ECU is on the VAZ 2114 – January 7.2 January 4 Bosch M1.5.4
Today, there are 8 (eight) generations of electronic control units, which differ not only in characteristics, but also in manufacturers. Let's talk about them in a little more detail.
ECU January 7.2 – technical specifications
And so now we move on to the technical characteristics of the most popular ECU January 7.2
January 7.2 is a functional analogue of the Bosch M7.9.7 block, a “parallel” (or alternative, as you like) domestic development with M7.9.7. January 7.2 is externally similar to the M7.9.7 - assembled in a similar case and with the same connector, it can be used without any modifications on the Bosch M7.9.7 wiring using the same set of sensors and actuators.
The ECU uses a Siemens Infenion C-509 processor (the same as the ECU January 5, VS). The block’s software is a further development of the January 5 software, with improvements and additions (although this is a controversial issue) - for example, an algorithm has been implemented, literally an “anti-shock” function, designed to ensure smoothness when starting and shifting gears.
ECU January 7.2
The ECU is produced (хххх-1411020-82 (32), firmware begins with the letter “I”, for example, I203EK34) and “Avtel” (хххх-1411020-81 (31), firmware begins with the letter “A”, for example, A203EK34) . Both the blocks and the firmware of these blocks are completely interchangeable.
ECUs of series 31 (32) and 81 (82) are hardware compatible from top to bottom, that is, firmware for 8-cl. will work in a 16-cl. ECU, but vice versa - not, because the 8-cl. block “does not have enough” ignition keys. By adding 2 keys and 2 resistors you can “turn” an 8-cell. block of 16 cells. Recommended transistors: BTS2140-1B Infineon / IRGS14C40L IRF / ISL9V3040S3S Fairchild Semiconductor / STGB10NB37LZ STM / NGB8202NT4 ON Semiconductor.
Typical ECU parameters January 7.2 for diagnostics
ECU January-4 - technical specifications
The second serial family of ECMs on domestic cars was the “January-4” system, which was developed as a functional analogue of GM control units (with the ability to use the same composition of sensors and actuators in production) and was intended to replace them.
Therefore, during development, the overall and connecting dimensions, as well as the pinout of the connectors, were preserved. Naturally, the ISFI-2S and “January-4” blocks are interchangeable, but are completely different in circuit design and operating algorithms. “January-4” is intended for Russian standards; the oxygen sensor, catalyst and adsorber were excluded from the composition, and a CO adjustment potentiometer was introduced. The family includes control units “January-4” (a very small batch was produced) and “January-4.1” for 8 (2111) and 16 (2112) valve engines.
ECU January 4 second generation of electronic control unit VAZ 2114
The “Kvant” versions are most likely a development series with J4V13N12 firmware in hardware and, accordingly, in software, are incompatible with subsequent serial controllers. That is, the J4V13N12 firmware will not work in “non-quantum” ECUs and vice versa. Photo of KVANT ECU boards and a regular serial controller January 4
ECU diagram January 4
Features of the ECM: without neutralizer, oxygen sensor (lambda probe), with CO potentiometer (manual CO adjustment), toxicity standard R-83.
Bosch M1.5.4 – technical specifications
The next step was to develop, together with Bosch, an ECM based on the Motronic M1.5.4 system, which could be produced in Russia. Other air flow sensors (MAF) and resonant detonation sensors (developed and produced by Bosch) were used. The software and calibrations for these ECMs were first fully developed at AvtoVAZ.
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.
The brains of the Bosch M1.5.4 ECU
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.
Itelma 5.1 - technical characteristics of the VAZ 2114 ECU
NPO Itelma has developed an ECU for use in VAZ cars, called VS 5.1. This is a fully functional analogue of the ECM January 5.1, that is, it uses the same harness, sensors and actuators.
VS5.1 uses the same Siemens Infenion C509, 16 MHz processor, but is made on a more modern element base. Modifications 2112-1411020-42 and 2111-1411020-62 are designed for Euro-2 standards and include an oxygen sensor, catalytic converter and adsorber; this family does not provide R-83 standards for 2112 engines. For 2111 and Russia-83 standards Only ECM version VS 5.1 1411020-72 with simultaneous injection is available.
Itelma 5.1 - technical characteristics of the VAZ 2114 ECU
Since September 2003, VAZ has been equipped with a new HARDWARE modification VS5.1, which is incompatible in software and hardware with the “old” one.
- 2111-1411020-72 with firmware V5V13K03 (V5V13L05). This software is incompatible with software and ECUs of earlier versions (V5V13I02, V5V13J02).
- 2111-1411020-62 with firmware V5V03L25. This software is not compatible with earlier versions of software and ECUs (V5V03K22).
- 2112-1411020-42 with firmware V5V05M30. This software is incompatible with software and ECUs of earlier versions (V5V05K17, V5V05L19).
In terms of wiring, the blocks are interchangeable, but only with their own software corresponding to the block.
Bosch M7.9.7 - ECU technical specifications
The 30 series Bosch was also found on 1.6 liter engines, but due to the initial development for a one and a half liter car, the software was very buggy, sometimes completely refusing to work. A special configuration marked 31h, released a little later, worked much more adequately.
The January seven had many models depending on the configuration and engine size, so on 1.5 liter eight-valve engines models produced by AVTEL were installed with the bar: 81 and 81h, the same brain from the manufacturer ITELMA had the numbers 82 and 82h. Bosch M7.9.7 was installed on 1.5-liter engines of export models and was marked 80 and 80h on Euro 2 cars and 30 on Euro 3 cars.
The brains of the Bosch M 7 ECU
1.6 liter engines of cars intended for the domestic market had on board devices from the same AVTEL and ITELMA. The first series from the first ones, marked 31, suffered from the same problems as Bosch 30 series, later all the shortcomings were taken into account and corrected in 31 hours. Despite problems among competitors, ITELMA has noticeably grown in the eyes of car enthusiasts, releasing a successful series number 32. Additionally, it should be noted that only Bosch M7.9.7 with marker 10 complied with the Euro 3 standard. The cost of a new ECU of this generation is 8 thousand rubles, used can be found at a disassembly site for 4 thousand.
ECU pinout diagram January 7.2 VAZ 2114
The VAZ 2114 controller often breaks down. The system has a self-diagnosis function - the ECU queries all components and issues a conclusion about their suitability for operation. If any element fails, the “Check Engine” lamp will light up on the dashboard.
ECU pinout diagram January 7.2
It is possible to find out which sensor or actuator has failed only with the help of special diagnostic equipment. Even with the help of the famous OBD-Scan ELM-327, loved by many for its ease of use, you can read all engine operating parameters, find the error, eliminate it and delete it from the memory of the VAZ 2114 ECU .
About the Hall effect
The essence of this effect is the emergence of a potential difference during the interaction of electric and magnetic fields. In this case, the electric field flows through the magnetic field, where the semiconductor wafer is located. It is at this point that the Hall voltage potential difference is formed.
In practice, the effect was applied as follows. When moving, the Hall voltage is converted into a pulse-frequency signal transmitted to the controller. The higher the speed, the higher the frequency of this signal becomes. From calculations it was possible to determine that the sensor produces 6004 pulses per 1 km of road. Due to the intervals between pulses, the sensor calculates the speed of the vehicle.
To perform any work with the DS, you first need to determine where it is located. The location of the speed sensor is the upper part of the gearbox housing. You can get to it through the engine compartment or from below if you park the car in a pit.
VAZ 2114 ECU burned out - what to do?
One of the common malfunctions of the ECU (electronic control unit) on the fourteenth is its failure or, as people say, combustion.
Obvious signs of this breakdown will be the following factors:
- Lack of control signals for injectors, fuel pump, valve or idle mechanism, etc.
- Lack of response to Lambda - regulation, crankshaft sensor, throttle valve, etc.
- Lack of communication with the diagnostic tool
- Physical damage.
In these cases, it is recommended to purchase a new ECU and replace the faulty one. How to do this is very simple!
Differences between control units
ECUs of older models worked with a limited number of sensors, so they could not ensure high-quality engine operation and preparation of the air-fuel mixture. The lack of support for the phase sensor (DPRV) led to the fact that the controller did not determine which cylinder was working at the moment, so it injected fuel not into the combustion chamber but into the air manifold. Devices operating in this mode were called central injection ECUs.
Installing a phase sensor on the engine made it possible to clearly determine the operating order of the cylinders, thanks to which fuel was calculated separately for each combustion chamber. Devices operating in this mode were called distributed injection ECUs. Over time, ECUs got better and better. Support for an oxygen sensor made it possible to more accurately regulate fuel combustion. Support for two oxygen sensors made it possible to move to higher toxicity standards, because in this case it was possible to effectively use the catalytic converter. The appearance of each new ECU model brought with it new functions that reduced fuel consumption, increased engine power or service life, and made driving more comfortable.
The controller is a complex electronic device, a microcomputer, so the breakdown or malfunction of any element leads to disruption of the functioning of the entire computer. In most cases, it is possible to determine an ECU malfunction only by elimination, checking the operation of the entire injector. For information on how to do this, read the article “Injector Diagnostics”.
How to remove and replace a faulty ECU on a VAZ 2114
When carrying out work to remove the VAZ 2114 ECU, do not touch the terminals with your hands. There is a possibility of damage to electronics due to electrostatic discharge.
- Using a screwdriver, unscrew the 3 screws securing the right panel of the instrument panel console and remove it.
- Release the clamp of the block with wires
- Disconnect the block from the ECU.
- Using a 10mm wrench, unscrew the 4 nuts securing the ECU to the bracket.
- We move the ECU forward and remove it from under the console.
- Remove the ECU from the bracket.
- Reinstall the ECU in reverse order.
How does it work
The heart of the ECU on the VAZ 2114 is a special microprocessor; its task is to control all systems of the car.
In this car, it collects information from sensors:
Electronics collects all this data together and processes it, but why? In order to adequately respond to all possible changes in the main systems of the machine and bring their operation up to normal.
The following actuators are under the control of the ECU:
The brains of the VAZ 2114 have a memory block diagram consisting of three cascades, each with its own working modules:
At its core, each of these modules is a separate device. They are connected to each other by an analogue of the motherboard, which is responsible for their correct interaction.
Where is the mass of the VAZ 2114 ECU located?
The first ground pin from the ECU on cars with a 1.5 engine is located under the instruments on the power steering shaft mount. The second terminal is located under the instrument panel, next to the heater motor, on the left side of the heater housing.
Location of the mass of the VAZ 2114 ECU
On cars with a 1.6 engine, the first terminal (mass of the VAZ 2114 ECU) is located inside the dashboard, on the left, above the relay/fuse block, under the sound insulation. The second terminal is located above the left screen of the center console of the instrument panel on a welded stud (fastened with an M6 nut).
Where is the relay and fuse of the VAZ 2114 ECU located?
The main part of the fuses and relays is located in the mounting block of the engine compartment, but the relay and fuse responsible for the electronic control unit of the VAZ 2114 are located in a different place.
Relays and fuses of the VAZ 2114 computer
The second “block” is located under the dashboard on the front passenger side. To access it you just need to unscrew a few fasteners using a Phillips screwdriver. Why is it in quotes, because there is no such block, there is an ECU (brains) and 3 fuses + 3 relays.
PRINCIPLE OF OPERATION AND LOCATION OF THE DEVICE
The electronic engine control unit starts working when the ignition is activated; it continuously functions while driving, collecting information from various fourteenth sensors. The received information is analyzed by the processor and, based on the results of the analysis of the received data, the device controls the functional systems of the VAZ-2114.
The VAZ 2114 engine control unit receives information from the following fourteenth sensors:
- (sensor) speed of movement;
- Oxygen;
- Detonation;
- Fuel injection phases;
- Crankshaft position;
- Throttle position;
- Instant air flow;
- Liquid temperatures in the cooling system.
Based on the information received, the ECU on the VAZ 2114 controls the following systems and components of the vehicle:
- Adsorber;
- Ignition system;
- Injectors and fuel pump;
- Ventilation;
- Automatic diagnostic programs;
- Idle speed control unit.
The brains on the VAZ 2114 consist of 3 separate devices, each of which has an individual type of memory:
- Random access storage device - a RAM block is a system with short-term memory. RAM contains information about recent errors that the ECU detected in the fourteenth systems and various current vehicle parameters. The RAM memory is completely updated when the ignition is turned off.
- A programmable permanent storage device is the main memory unit; it stores the ECU firmware. The PROM contains information about the results of calibrations of the fourteenth systems, as well as the power unit control algorithm. The EPROM memory is permanent; it is stored when the ignition is turned off. With certain skills, the EPROM block can be reprogrammed, which will improve the power and dynamics of the VAZ 2114.
- An electrically reprogrammable storage device is the main functional purpose of the unit - protecting the machine. The EEPROM contains data from the fourteenth anti-theft system - passwords and their encoding. It will be possible to start the engine only after the EPROM and the immobilizer compare data with each other.
The VAZ 2114 ECU is hidden inside the dashboard, right under the dashboard. In order to get to the brains, you need to use a Phillips screwdriver to unscrew the fixing screws and remove the side panel of the dashboard from the passenger seat. There you will see a longitudinal plastic brain housing, which is inserted inside a stainless steel retainer.
To remove the control unit, you need to unscrew the fixing bolt and pull the lock towards you, after which the device can be freely removed (you must first completely de-energize the car by removing all terminals from the battery).
What to do if the scanner does not see the VAZ 2114 ECU
Reader question: Guys, why does it say during diagnostics that there is no connection with the ECU? What to do? What to fix?
So, why doesn’t the scanner see the VAZ 2114 ECU? What should I do so that the device can connect and see the block? Today you can find many different adapters for testing a vehicle on sale.
If you buy an ELM327 Bluetooth, most likely you are trying to connect a low-quality device. Or rather, you could have purchased an adapter with an outdated version of the software.
Car diagnostics using a scanner
So, for what reasons does the device refuse to connect to the block:
- The adapter itself is of poor quality. Problems can be with both the device’s firmware and its hardware. If the main microcircuit is inoperative, it will be impossible to diagnose the engine operation, as well as connect to the computer.
- Bad connection cable. The cable may be broken or inoperative itself.
- The wrong version of the software is installed on the device, as a result of which it will not be possible to achieve synchronization (the author of the video about testing the device is Rus Radarov).
In this case, if you are the owner of a device with the correct firmware version 1.5, where all six of the six protocols are present, but the adapter does not connect to the ECU, there is a way out. You can connect to the unit using initialization strings, which allow the device to adapt to the commands of the machine’s motor control unit. In particular, we are talking about initialization lines for diagnostic utilities HobDrive and Torque for vehicles that use non-standard connection protocols.
Video “Instructions for replacing the electronic unit in a VAZ 2115 yourself”
If you decide to replace the ECU, then this task can be done at home - detailed instructions for replacing the device yourself are presented in the video below (the author of the video is the AVTO CLASS channel).
How the mass of the ECU and the mass of the engine - body are arranged, where it is located and how to check it. It is these interesting questions that we will address on this page.
The topic is really interesting and not as simple as it seems at first glance.
It would seem that there is nothing complicated here - a simple circuit and a rather thick wire, with which it is unlikely that anything can happen. But not everything is so simple, and we will “talk” about this further.
Voltage disappears on the VAZ 2114 ECU - what to do
Reader question: Hello everyone, please help me with the problem. The symptoms are as follows: 1. Error 1206 appears - on-board network voltage interruption. In cold weather, starting the engine is generally a problem - it takes a few seconds, a click sounds like a relay is triggered, the speed jump check light comes on and the car stalls. This can go on for half an hour, and the car may stall while driving. When the engine warms up, the loss stops. Where can I look for the cause of what kind of sensor might have gone missing? Thanks in advance!
Error voltage loss VAZ 2114
In principle, there can be many solutions to this problem:
- If the voltage on the battery is less than 12.4 volts, then the ECU begins to save energy, at 11 you may not even be able to start it on a cord))) The ECU sometimes sees a voltage less than what is actually on the battery, this usually indicates that it’s time to clean the ECU mass, Look into the connector and wipe the contacts. In your case, when it’s cold it’s a problem, when it’s hot everything’s fine. And if you look from the battery side? When hooked, the problem is, when recharged, everything is fine. A good diagnostician will not harm the machine
- I also recommend paying attention to the malfunction: ignition coil, ignition module, contactless spark plug ignition switch.
Well, that’s it, dear friends, our article about the VAZ 2114 ECU has come to an end. Still have questions? Be sure to ask them in the comments!
