ECU (electronic control unit) is a device that controls the parameters of the mechanisms during operation. Usually, the abbreviation of the ECU is used in relation to the engine control unit.
In fact, in the car there are still control blocks brake system (ABS block), body control unit, which is often referred to as Body Control Module (BCM or BSI), climate control unit (climate control) and others.
Principle of operation
Principle of operation electronic block The motor control is built on the standard microcontroller architecture. Engine parameters data different sensors Enroll in the ECU, then processed (enhanced, digitized, encoded).
The main processing of data on a specific algorithm produces a microprocessor, which on the output bus gives signals to actuators. These signals are adapted (converted from numbers to analogue, amplified) and entered on the connectors of the electronic control unit.
The tasks solved by the electronic motor control unit include diagnostics of the main nodes. Modern ECUs can identify a variety of errors:
- lack of supply voltage on electronic engine nodes or low power;
- emboss of electrical circuits or short circuit;
- incorrect signals at the output of the sensors;
- ignition pass and injection;
- nonconformity of the ignition angles;
- and many others.
Errors are stored in non-volatile memory up to their deletion using diagnostic devices (valid errors cannot be removed without eliminating the cause of the error).
In cars earlier, errors could be removed temporary (about 15 minutes) by disconnecting the battery from the on-board network of the car.
The ECU together with the immobilizer blocks the operation of the engine in the event of unauthorized access. Each electronic motor control unit makes this function in accordance with the algorithm laid by the manufacturer.
Blocked can:
- ignition signal on the coil;
- fuel injection pulses;
- permission to launch starter and others.
In some cars, the engine can run for a few seconds and stuck.
Scheme
The fundamental circuit diagram of the engine control unit itself is a production secret, and find it even for domestic cars Very problematic.
Therefore, the repair of the ECU is produced only by professional high-level electrics. Usually in the control blocks fail the injection and ignition control transistors, the stabilizers of the reference stresses, firmware flies.
Specialists sometimes specifically change the software firmware in order to increase the engine pickup or reduce fuel consumption.
Video - ECU firmware M74:
To repair electronic engine nodes, an electrical connection circuit is required. Such a scheme can be found in the manuals for the operation and repair of cars, software and technical complexes of the type of Autodata and Tolerance.
For example, consider the organization of the Volksvagen Golf car engine control circuit 3 2001 release, engine MAGNETI MARELLI 1 AV.
Without deepening in the scheme, you can see that the camshaft sensor signals use as the ECU sensors, mass flow air, coolant temperature, oxygen.
The signal coming from the camshaft sensor is shaped:
As executive mechanisms, the ECU controls injectors injection signals, throttle drive, ignition to the coil switch:
ECU is associated with immobilizer, dashboard.
In order to check the electrical connections of the circuit nodes with an electronic motor control unit, it is necessary to know the location of the contact terminals (pinout), which is also provided in the reference books:
Where is the engine control unit
In cars, until the 90s of the release, the most rational location of the engine control unit was considered space in the cabin of the car near the left or right front counter in the field of the passenger's foot or driver. First of all, it was believed that these are the most secure places from the point of view of mechanical damage and moisture penetration.
Video - Transferring ECU on Kalina:
From the mid-90s, the engine control blocks put in podcast space. This is due to the following considerations:
- under the hood easier to search for electrical connections faults;
- all communications with engine sensors and executive mechanisms become shorter, therefore, more reliable;
- The computer has become more reliably defended by moisture with special sealants.
In the absence of reference books, you can easily find the electronic engine control unit, moving along a large wiring harness of the engine control system. It usually represents a small electronic unit in a metal casing with one or several connectors in the end part.
In many cases, get access to inner space block K. electrical scheme Not easy: she is filled with compounds that need to be deleted. The fee, as a rule, contains a small amount of components.
Signs of malfunction of the EBU
Among the auto plays there is an opinion that the electronic engine control system fails to be late. Moreover, it is not always possible to determine the malfunction of the engine control unit.
Indeed, the computer can digit about the nodes connected to it, but to diagnose their own performance in most cases it is unable.
What can indicate a malfunction of the ECU?
The most frequent signs of malfunction are constant burnout of fuses serving the engine control unit. In the practice of operation, there are no discretion cases of connectivity rechargeable battery. In the ECU scheme there are protective diodes for this case. If they make their way, there is a short circuit for nutrition, which leads to constant burnout of the fuses. Faulty must be changed.
Also, a malfunction for nutrition can cause an ACB shutdown during engine operation. In this case, the control unit is powered only from the generator and, if it is faulty, a situation may occur incorrectly submitted to the voltage block.
It is impossible to remove the battery terminals on the running engine (!)How many car enthusiasts do when starting from someone else's battery.
How to check the ECU for performance
The first phase of performance testing is the control of all feeding voltages.
Second phase - computer diagnostics. If the diagnostic device is associated with the engine, this is already a sign of the performance of the ECU.
On the blocking of the block by the immobilizer, then you need to tie the keys.
In some cases, to determine the fault, you must disassemble the computer, that is, remove the sealant and remove the cover by getting access to the board. It can detect running conductive tracks, defective transistors, diodes and other elements.
The most reliable method of checking is to "throw up" an obviously good ECU. But it should be either a non-free or new to "tie" keys and immobilizer.
Sometimes on disassembly, a set of ECU + immobilizer + key chip is sold. In this case there are no problems. Connect to the ECU and immobilizer scheme, the chip is set to the end of the pump coil on the ignition lock, and then start the engine.
Additional protection
For more confident protection of the engine control unit from the reverse battery and can be installed on the supply circuits to install diodes (better powerful stabilizers with a stabilization voltage 15 - 17 volts) in reverse turning on.
Then the overvoltage and cake will lead to the failure of the fuses serving the power supply circuit of the ECU, the increased voltage or the inverse polarity voltage to the control unit will not pass, and this is the greatest danger.
In order to protect the ECU from climatic influences, it is necessary to monitor the quality of the sealant. After five years of operation, it is advisable to take measures to improve tightness, since the former sealant can refuse in conditions of elevated temperatures under the hood.
Video - Protection of the Renault Duster Engine Control Block (Logan, Largus):
You can not close access to the block with additional structures, lay the rag near it. This reduces the natural ventilation of the device, which in the process of the car heats up.
Replacing the engine control unit
If the control unit has failed, and it is not repaired, it should be replaced with a similar one with the same number indicated on the ECU housing.
Sometimes a small deviation is allowed in the room. For example, the change in the last two or three digits may indicate another volume of the engine or modification, which can practically do not affect the technical characteristics.
Engines internal combustion constantly enhanced. A little more than half a century ago, a person could affect their work only mechanically, now all work is based on electronics. ECU What is it, why is it applied and what does it have to do with this? All of this you will learn from this article.
The electronic motor control unit is small devicedesigned to maintain the desired engine parameters during operation. Initially, this device came to replace the carburetor control devices, as a controller that adjusts the desired amount, as well as the quality of the mixture. Over time, the ECU evolved to a device that controls almost everything on-board network car. It accepts information from different sensors, and, accordingly, affects everything: Woz, fuel system, headlights, gearbox and more. The purpose of its creation is to make a car more economical, faster, but on a par, eliminate a large number harmful emissions in atmosphere.
As you understand, this block is very important, which means that without it your car just becomes breasting, which is why it is important to know as much as possible. It's time to list the basic parameters that affect its work:
- Motor temperature
- Exterior temperature
- The amount of oxygen and fuel, as well as monitoring idle Engine
- Various sensors related to wheel safety
- Motion speed
- Corner provisions of such mechanisms as throttle valve and gas pedal, as well as crankshaft.
- Control Sensors technical liquids, air conditioning system.
- Side tension, as well as control over electrical energy consumers.
All this is a standard set, but enough affects the operation of the engine. C. it's more expensive, the greater this is the number of sensors. There are systems that have a tight connection with the radio, as well as on-board computer and bring them on overall work, and there are those that affect the work of the pneumatic suspension.
Many will seem that the computer looks like a powerful computer or laptop, which is asked for such a number of information that its dimensions increase because of this. In fact, this is not the case and it represents a very compact device.
Let's start with what this block is manufactured. In nature, there are only two material used in the automotive industry - it is metal and plastic. On cars domestic production Plastic controllers are used, and in many foreign cars in the metal case. In general, their function is identical and the principled difference between them is not.
An electronic board is installed inside the case, which is a miniature computer capable of performing a large number of calculations for the fraction of seconds. Outside the housing is displayed two connectors:
- CAN, which is responsible for connecting to the bus that come from various sensors
- OBD connector needed to connect route or diagnostic computers.
Naturally the base of the body serves a metal on which a radiator is located for heat removal. The fact is that with such an accelerated work and temperature effects of the engine, the board may heat up, which will significantly affect its operation.
If we talk about sizes, the block is a rectangular box, 30x30 centimeters and about 5-8 centimeters high. Not so much for such a device. Try to compare it with a lot of other computers. In addition, its sizes are becoming less and less.
You have already understood that this is a board. But what does it contain? And everything is simple, inside the PPZ memory is installed, which processes long data and stores them if necessary, RAM - for processing very fast data and ERPU - for temporary data, for example, signaling or different locks.
The principle of operation of all these devices is extremely simple: they receive information from sensors, process it, making the necessary calculations, and sent to actuators that make what you need to improve work.
Where is the controller
For location, only two places are applied - this is a car salon and a bootable space. Very rare case - trunk. However, the most unsuccessful place is precisely pumping space. The thing is that there may be dirt, snow, moisture, which negatively affect the work of the processor. In addition, a large amount of heat is constantly coming from the motor, which the ECU is clearly not needed.
The firmware is called software that is used to process all data. To make it easier for you - this is the same Windows on your computer with a set of necessary options. From what it will stand depends on a lot.
Many people are engaged in chip tuning, which changes the parameters of the calculations and regulate the operation of the engine to a more productive mode or on economical. To do this, they connect the controller to a special computer and download all the data you need. Of course, in the case of its mechanical breakdown, no firmware will no longer help.
Video on the topic
Electronic motor control unit (ECU) - "Computer", managing the entire car system. The computer affects both the work of a separate sensor and on the entire car. Therefore, the electronic motor control unit is very important in a modern car.
ECU is most often replaced by the following terms: Electronic system Engine control (ECD), controller, brains, firmware. Therefore, if you hear one of these terms, then know that we are talking about "brains", about the main processor of your car. In other words, Esud, ECU, the controller is the same thing.
Where is the ECU (controller, brain)?
The electronic engine control system (ECU, Esud) is attached under the central torpedo panel of your car instruments. To access it, you need to unscrew the fastenings of the sideways of the torpedoes of the cross cripper.
Principle of operation of the controller (ECU)
The electronic engine control unit for all operation of the engine receives, processes, controls systems and sensors affecting both the engine and the engine and the secondary elements of the engine (exhaust system).
The controller uses the following sensors:
- (Crankshaft position sensor).
- (Aircraft air flow sensor).
- (Cooling fluid temperature sensor).
- (Throttle position sensor).
- (Oxygen sensor).
- (Knock sensor).
- (Speed \u200b\u200bsensor).
- And other sensors.
Getting given from the sources listed above, the ECU controls the operation of the following sensors and systems:
- (Fuel pump, pressure regulator, nozzle).
- Ignition system.
- (DXH, RHX).
- Adsorber.
- Radiator fan.
- The system of diagnosticia itself.
Also, Esud (ECU) has three types of memory:
- Programmable constant storage device (PPZ); Contains the so-called firmware in itself, i.e. The program in which the basic calibration readings are clogged, the engine control algorithm. This memory It is not erased when the power is turned off and is constant. Amenable to reprogramming.
- Operational storage device (RAM); It is a temporary memory in which the system errors are stored, the parameters measured. This memory is erased when the power is turned off.
- Electrically reprogrammed storage device (ERPU). This type of memory can be said is the protection of the car. It temporarily stored codes and passwords of the anti-theft system of the car. Immobilizer and ERGU are compared with data, after which the engine is possible.
Types of ECU (Esud, Controller). What ECU is installed on the VAZ?
"January-4", "GM-09"
The very first controllers on Samara were January-4, GM - 09. They were installed on the first models until 2000 release. These models were produced as a resonant detonation sensor and without it.
The table shows two columns: 1 column - the number of the ECU, the second column is the brain brand, the firmware version, the rate of toxicity, distinctive features.
| 2111-1411020-22 | January-4, without DC, RSO (resistor), 1st Ser. version |
| 2111-1411020-22 | January-4, without DC, RSO, 2nd gray. version |
| 2111-1411020-22 | January-4, without DC, RSO, 3rd gray. version |
| 2111-1411020-22 | January-4, without DC, RSO, 4th gray. version |
| 2111-1411020-20 | GM, GM EFI-4, 2111, with DK, USA-83 |
| 2111-1411020-21 | GM, GM EFI-4, 2111, with DC, Euro-2 |
| 2111-1411020-10 | GM, GM EFI-4 2111, with DC |
| 2111-1411020-20 C. | GM, RSO |
VAZ 2113-2115 from 2003 equipped with the following types of ECU:
"January 5.1.x"
- simultaneous injection;
- phased injection.
Interchangeable with "VS (ITELMA) 5.1", "Bosch M1.5.4"
"Bosch M1.5.4"
The following types of hardware implementation are distinguished:
- simultaneous injection;
- pairwise - parallel injection;
- phased injection.
"Bosch MP7.0"
As a rule, this type of controller is manufactured on the market, the plant is set in a single volume. Has a standard 55 pin connector. It is capable of working with sketching on other types of Esud.
"Bosch M7.9.7"
These brains began to be part of the car since the end of 2003. This controller has its own connector incompatible with connectors produced before this model. This type of ECU is placed on the VAZ with the normal toxicity of Euro-2 and Euro-3. This ECM has more easy weight and smaller dimensions than previous models. There is also a more reliable connector with increased reliability. They have a switch in their composition, which in general will increase the reliability of the controller.
This ECU is not compatible with previous controllers.
"VS 5.1"
The following types of hardware implementation are distinguished:
- simultaneous injection;
- pairwise - parallel injection;
- phased injection.
"January 7.2."
This species ECU is made on another type of wiring (81 pin) and similar to Boshevsky 7.9.7+. This type of ECU is produced both at the production of ITELMA and Avtoal. Interchangeable with Bosch M.7.9.7. Concerning software7.2 is a continuation of January 5th.
This table shows the variations of the Bosch ECU, 7.9.7, January 7.2, ITELM, installed solely on the VAZ 2109-2115 with an engine 1.5l 8kl.
| 2111-1411020-80 | Bosch, 7.9.7, E-2, 1.5 l, 1st Ser. version |
| 2111-1411020-80CH | Bosch, 7.9.7, E-2, 1.5 l, tuning version |
| 2111-1411020-80 | Bosch, 7.9.7 +, E-2, 1.5 liters |
| 2111-1411020-80 | Bosch, 7.9.7 +, E-2, 1.5 liters |
| 2111-1411020-30 | Bosch, 7.9.7, E-3, 1.5 liters, 1- Ser. version |
| 2111-1411020-81 | January 7.2, E-2, 1.5 l, 1st version, unsuccessful, replace A203EL36 |
| 2111-1411020-81 | January 7.2, E-2, 1.5 l, 2nd version, unsuccessful, replace A203EL36 |
| 2111-1411020-81 | January 7.2, E-2, 1.5 l, 3rd version |
| 2111-1411020-82 | ITELMA, DK, E-2, 1.5 l, 1st version |
| 2111-1411020-82 | Itelma, DK, E-2, 1.5 l, 2nd version |
| 2111-1411020-82 | ITELMA, DK, E-2, 1.5 l, 3rd version |
| 2111-1411020-80 C. | Bosch, 7.9.7, without DC, E-2, Dean, 1.5 liters |
| 2111-1411020-81 C. | January 7.2, without DC, CO, 1.5 l |
| 2111-1411020-82 C. | ITELM, without DC, CO, 1.5 liters |
Below is a table with the same ECU, but 1.6l 8kl on the engines.
| 21114-1411020-30 | Bosch, 7.9.7, E-2, 1.6 l, 1st Ser, (buggy software). |
| 21114-1411020-30 | Bosch, 7.9.7, E-2, 1.6 l, 2nd Ser |
| 21114-1411020-30 | Bosch, 7.9.7+, E-2, 1.6 l, 1st Ser |
| 21114-1411020-30 | Bosch, 7.9.7+, E-2, 1.6 l, 2nd Ser |
| 21114-1411020-20 | Bosch, 7.9.7+, E-3, 1.6 l, 1st Ser |
| 21114-1411020-10 | Bosch, 7.9.7, E-3, 1.6 l, 1st Ser |
| 21114-1411020-40 | Bosch, 7.9.7, E-4, 1.6 l |
| 21114-1411020-31 | January 7.2, E-2, 1.6 l, 1st series - unsuccessful |
| 21114-1411020-31 | January 7.2, E-2, 1.6 l, 2nd series |
| 21114-1411020-31 | January 7.2, E-2, 1.6 l, 3rd series |
| 21114-1411020-31 | January 7.2+, E-2, 1.6 L, 1st series, new hardware version |
| 21114-1411020-32 | ITElma 7.2, E-2, 1.6 l, 1st series |
| 21114-1411020-32 | ITELM 7.2, E-2, 1.6 L, 2nd series |
| 21114-1411020-32 | ITELM 7.2, E-2, 1.6 L, 3rd series |
| 21114-1411020-32 | ITElma 7.2+, E-2, 1.6 l, 1st series, new hardware version |
| 21114-1411020-30 | Bosch, DK, E-2, Dean, 1.6 l |
| 21114-1411020-31 C. | January 7.2, without DC, CO, 1.6 l |
"January 5.1"
All types of controllers of their type are built on the same platform and have differences most often in the switching of the nozzles and the heater of the DC.
Let's consider the following example of the firmware of the ECU of January 5.1: 2112-1411020-41 and 2111-1411020-61. The first version has a phased injection and oxygen sensor, the second version differs only by the fact that it has a parallel injection. Conclusion - the difference between these ECU is only in firmware, so they can be interconnected.
"M7.3."
The erroneous name is January 7.3. This is the last type of controllers, which is currently installed on AvtoVAZ. This type of ECU is established since 2007. on VAZ with the normal toxicity of Euro-3.
The manufacturers of this ECU are two Russian firms: ITELMA and AVTEL.
Below, the table shows the ECU for engines with the normal toxicity of Euro-3 and Euro-4.
How to determine the ECU?
To learn how to determine your controller, you will have to remove the side frame of the torpedoes. Remember your ECU number and find it among our tables.
Also, some on-board computers show the type of the computer and the firmware number.
Diagnosis of EBU
The diagnostics of the ECU is reading errors recorded in the memory of the controller. Reading is performed using special equipment: PC, loop, etc. Through the diagnostic to line. You can also do the on-board computer, which has the functions of reading ECUM errors.
Almost everyone gasoline engines modern cars They have injection fuel systemswhose executive mechanisms have electric drive are nozzles, electromagnetic valves And various flaps.
All these mechanisms are managed automatically, according to a given program. Control pulses gives the computer (deciphered as an "electronic control unit"). But in order to be able to give "adequate" teams, the ECU should have feedback with the engine - it is this purpose and serve.
Scheme of the electronic control unit (ECU) of the car
The engine of the car engine, in fact, is a rather complicated integrated circuit, it is not in vain called the "brain" of the engine. Reception of information, its processing and sending of control signals must occur almost instantly.
A simple press on the gas pedal driver changes a whole range of changes in signals that come from sensors to the ECU and from it on the nozzles and other mechanisms. In addition, to form signals so that they are not in conflict with the real setting of the mode of movement of the car. Particularly complex processes occur in the ECU of cars, "stuffed" various electronics - aBS systems, ASR, etc.
The engine of the car engine, in fact, this is a rather complicated integrated circuit, which is called the "brain" of the engine.
The task of the ECU also includes optimization of fuel consumption and composition exhaust gases, Moreover, with minimal damage for the power characteristics of the engine. In addition to these basic functions, the block performs constant diagnosis of the entire system. For professional "decryption" status of the engine control system, the device is equipped with a shower with a block for connecting diagnostic equipment.
Due to the fact that the ECU is a small computer, the parameters of its operation can be changed in accordance with the personal requirements for the machine.
For this purpose and apply the so-called chip tuning, or change the firmware of the ECU, making adjustments to the manufacturer's running program. It is sufficiently affordable for car enthusiast equipment for the firmware of the computer is the programmer - provided that you have a PC or similar instrument.
Programmer ECU
One of the programmers of the ECU
The control unit programmer is an adapter with which you can either simply make a diagnosis of the ECU or make changes to its software. When choosing a device, it is necessary to take into account its compatibility with the controller model - the sprinkling of the ECU is different, and the individual features of the programmer, just, are determined mainly by the cable for the firmware of the ECU - various devices can be collected on the basis of one processor. The price of the programmer is determined by the number of components in which it includes. Some computer firmware programs are already included in the cost of the kit.
The device has detailed instructions For use, and if it allows the equipment, questions, how to flash the ECU with it, should not arise - almost all now have skills to work with such a technique.
The control unit programmer is an adapter with which you can either simply make a diagnosis of the ECU or make changes to its software.
In order to erase the errors of the ECU, it is enough to use the autoskner, (for example, on the basis) connected to the standard diagnostic shoe. Autoskner can also be used to diagnose the engine control system - and such devices are capable of transmitting data to a smartphone, and it is easier to use them and safer - the pinout of the OBD 2 diagnostic pads.
But in order to obtain the most full information using the auto repairer, you need to install on the PC the so-called editor of the firmware of the ECU of the car - a program, thanks to which you can change the commands given to the executive mechanisms.
But the use of autocreen is sometimes limited by the design of the "brains" - the most outdated version of their versions do not issue information to the OBD 2 block in the proper volume. The programmer, equipped with a cable for the computer firmware, allows you to get all the data on the block and the engine control system as a whole.
In any case, certain oplashing skills are remedy by practice. If you have some experience, you can already identify the shortcomings and the advantages of each of the programs. Start better with those you can download online for free. But here are the training courses, as a rule, paid.
But not always the change in the firmware of the computer brings the desired positive result. For example, you want to achieve an increase in engine power due to an increase in the amount of fuel injected. Increase the opening time of the nozzle - and the motor is still "not pulling." The causes may be clogged nozzles, and even incorrect operation of the absorber air temperature sensor, etc. The ECU will give a signal, counting it on the basis of sensor readings, and not to measure the actual amount of fuel injected - therefore, the flashing will not give anything in this case and you need to go deep into the "Matchast" - rinse the nozzles, check the connections of the wires with devices, etc.
Repair ECU engine
Repair of electronic control (ECU) car better instruct specialists
Repair and full-fledged diagnostics of the ECU of the engine for only a specialist.
Even if the housing is collapsible, it is possible to visually only to see corrosion on its details or, which happens to be infrequently, to state the melting or burnout parts.
In addition, when trying to repair the ECU with your own hands, it is possible to deal with previously serviceable details, for example, just touching them with your hand. The fact is that semiconductor devices are very sensitive to discharges of static electricity.
Repair and full-fledged diagnostics of the ECU of the engine for only a specialist.
But in any case, you must first find where the ECU is. Most often it is located either near the instrument panel (at the glove), or under the front seats. But if you do not know exactly, use the auto operating manual.
In Lada Kalina, the first edition issues were located under the heater radiator. Such an "original" location of the block led to the fact that antifreeze arising from the capped radiator was filled with "brains", withdrawing them. However, even the successful placement of the ECU on GAZ 3110 did not save him from the water that fell into it due to the working windshield seal.
A sign of the malfunction of the ECU is that there is no connection to the ECU with managers and executive mechanisms. How to check the ECU? You can only independently checking the signal to the block and from it. But it is best to give the car to the car service, which has a motor-tester with an oscilloscope.
The ordinary car enthusiast that does not respond in the subtleties of the car's design can only protect the ECU protection to its correct operation - avoid the voltage jumps caused by the disconnection of the instruments with the ignition turned on, for example, as well as, if necessary, "refine" factory miscarriages - isolate the block from water from entering it .
Today we will talk about how to replace the engine control unit by car VAZ 2110-2112 and where this detail of electronics is at all. For those who do not know, "brains" is the main element in Esud, which is responsible for the entire fuel supply cycle into the combustion chamber and manages all the processes of the motor operation.
Location of the control unit on the VAZ 2110-2112
So, the "brains" are directly under the instrument panel, namely in its lower part. To get to them, it is necessary to remove the plastic panel from the passenger side, which is shown in the photo below using a crusade screwdriver for this:
And in the depths of all this heap of wires and relays with fuses, you can find the controller itself, which is fastened in a horizontal position on the bar:
Now we consider the procedure for removing and installing the controller.
Dismantling and replacing the ECU on VAZ 2110, 2111 and 2112 cars
So, the first thing you need to disconnect the "minus" terminal from the battery. Now it is worth noting that the following tool will need to fulfill this simple work:
- Face head for 10
- Patty handle
- Cross blade screwdriver
When you got to the engine control unit, you need to disconnect the plug from it with the wiring harness, after after throwing a metal latch:
Now it is necessary to unscrew the two brains mount nuts, as shown in the photo below:
When these two nuts are unscrewed, you need to slightly move the bar to the right to release it from the engagement:
After that, you can carefully remove the ECU:
It is worth paying attention to that when the controller fails, the new one must be installed as stood before - from the factory. The price of new controllers can be from 4500 to 10,000 rubles, depending on the type and year of the car. Installation is carried out in reverse sequence.
