As correctly called brains in the car. Pinout contacts of the blocks of the ECU motor automotive

27.09.2019

The electronic unit Engine control - without this component modern car Simply unthinkable. In the entire control system, the power unit of the ECU is the main element.

The task of the electronic engine control unit

Its purpose is to receive incoming information that various sensors guide. These data are processed according to a special algorithm, after which commands are created for the comprehensive components. The presence in the design of the auto computer makes it possible to optimize the main performance indicators power aggregate:

torque;
power;
the composition of the exhaust gases;
consumption, etc.

Nevertheless, the electronics is diagnosed with all machine systems.

A bit of history

The appearance of the electronic engine control unit was due to the need to feed into the motor cylinders fuel mixes in the desired quantity and required consistency. Prior to the creation of the electronic unit, these functions carried out a carburetor, to improve which the main forces of the designers were directed.

However, the appearance of available and marked the sunset of the carburetor era, which happened in the 70s. But the first electronic blocks were created by the Italians from the 6C2500 for their model, which happened in the mid-50s. This block was called "Caproni-Fuscaldo".

Gradually, the ECU was improved, "studied" to accompany the testimony of an increasing number of sensors, control and ignition, became more productive, etc. Contemporary electronic unit is able to create Controller Area Network - unified system Management - Exchange data with other auto systems.

ECU components

All components of the control unit can be divided into 2 large blocks:

Hardware.

Software

It consists of a pair of computational modules:

control - it is configured to inspect outgoing signals, as well as their adjustment, if there is a need. Moreover, this module is able to even soak the power unit;
functional - the task includes receiving signals from different sensors, further processing them, as well as the formation of commands for executive instruments.

Hardware

It consists of the mass of electronic elements - microprocessors and others. The installed analog-to-digital converter catches that they go from different sensors, and translates them into a digital format, to which the microprocessor is oriented. If there is a need to reverse transformation (commands coming from the processor), the converter translates them. In addition, pulse signals arrive on the computer, which also pass through the converter to change their format into digital.

Principle of operation electronic block

The functioning of the ECU is to accept information from various sensors, the number of which on modern models reaches 20 or more:

air flow data;
indicators with lambda probe;
(its position and frequency of rotation of the part);
signals about the irregularities of the track and so on.

In addition to processing these signals, the ECU sends signals to various devices:

ignition - this may be like one coil, and immediately several (depends on the type of power unit). This node is responsible for timely in the motor cylinder.
the light indicator is its purpose consists of issuing notifications about the presence of errors, both in the engine and directly in the block.
injectors - through them the injection of fuel in cylinders is carried out. In this case, the frequency of changes in the number of this fuel is constantly changing, because it depends on various conditions. In this case, the characteristics of the injectors (the reaction of their control components to changes from the ECU, as well as the speed of their operation) to the fore.
testers - diagnostic equipment connect through a special connector if there is a need to check the motor and the electronic motor control unit.

Pros and Cons Electronic Engine Control Block

Despite the obvious advantages of the ECU, he has not only strengths.

Advantages of EBU

optimization of dynamic indicators;
reduction of consumption;
easy to start the motor - ECU promptly adapts in difficult conditions of operation (heating the motor in winter or mode idle move);
no need for manual adjustment;
increase environmental purity indicators.

Disadvantages of the EBU.

high cost of components;
the impossibility of repair is only replacement;
the need for expensive and complex equipment for the diagnosis of the ECU, and more specially trained equipment and electricians;
high demands about power reliability indicators;
the need for high-quality stuel.

Signs of failure And the reasons for his breakdowns

As a rule, breakdown of the ECU is characterized by the presence of the following signs:

the block does not respond to signals from the lambda probe - the readings of the temperature sensors, as well as the position throttle valve;
there are no signals indicating the management of different components of the actuator - idling valve, fuel injectors, fuel pump, etc.
damage to mechanical character - blurred conductors or chips.

Video: Repair of electronic control units

Usually allocate several of the most common cases, which is able to lead to such a malfunction:

moisture getting on the surface of the ECU;
closure of wiring due to its cliff or other factor;
incorrect polarity while connecting the battery;
starter activation when the power bus is disabled;
when the battery is "searched" from the car, which runs the engine;
if removed when the motor is running;
in the case when the electrode is clinging the wiring of the machine or its sensors in the process of welding;
repair or installation of alarm with an unqualified electrician;
the breakdowns in the ignition system (its high-voltage part) are wires, ignition coils or distributor.

When inspection, you must first check the possibilities of ensuring, and only then the possibilities of execution. Moreover, for cars there are tables of significance of each component. The reason for such ranking is that the loss of only one function of the provision, as a rule, pulls the loss of several functions of execution at once.

Outcome

As can be seen, the electronic motor control unit plays a key role in the operation of the entire system. Therefore, the faults of this component must be eliminated.

For the correct operation of high-tech nodes and aggregates, each mechanism requires an electronic control unit. This term includes the concept of a system that manages all the modes of operation of the mechanisms.

Most motorists have an elementary idea of \u200b\u200bwhat the ECU is and what is its purpose. Microcircuit with the jet of microprocessors, resistors, converters and other elements a fairly high-tech node. Especially if you do not interest the world of electronics and automation.

Design

The complexity of the design depends on the multitasking of the functions performed. The more you have to process the parameters, the high-tech controller is arranged.

The design of the ECU assumes the presence of hardware modules and software. The head of the hardware is a microprocessor. To convert signals to "understandable", the impulses use analog-digital converters. The software is a specified actions algorithm, according to which the input parameters are measured and the adjustment of the subsystems. It includes functional and control modules. The functional part of the computer is responsible for receiving, processing the sensor signals and signal the executing devices. The control module monitors the correctness of the parameters processed. In case of deviations, it reconfigures the system. In other words, responsible for adaptation to changing conditions.

Control of nodes and aggregates

For modern cars, the electronic motor control unit is the most important element of ensuring the maintenance of the power unit. In order to achieve maximum engine productivity, it is necessary to accurately precisely dose the proportion of the fuel and air mixture, recover the time of injection, as well as optimize the operation of attachments.

The first controllers were installed on injector engines. They controlled the cylinder cylinders taking into account the signals of just a few sensors (the position of the crankshaft, the amount of the absorbable air, the position of the throttle). The engine control unit in a modern car processes a much larger number of signals (the position of the camshaft, the presence of detonation in the cylinders temperature of the coolant, the oxygen content in the exhaust gases and other). Because of what it is possible to accurately optimize the interaction of the main processes in various modes of engine operation. Turbocharging control, recycling systems exhaust gasesThe changes in the phases of gas distribution is also carried out by the control unit.

Software control applies not only with a gasoline engine, but also on diesel engine.

In a pair with motor ECU in the car can be involved:

Diagnostics and programming

Such a number of individual control systems requires the main "cerebral center". The central synchronization module has access to reports from all individual centers. Coding and transmission of information is carried out by means of a san bus. Thanks to this, the driver has it possible to obtain information about the degree of correctness of the operation of units and units in real time (control notifications on dashboard).

Each computer has a memory block where errors are written in the system. A diagnostic connector and a special device or appropriate computer support will help identify the cause of many faults. In models of later releases, such a procedure is carried out by closing certain contacts in the fuse block. Diagnostics "paper clip" shows error codes, the decoding of which will give an idea of \u200b\u200bbreakage.

Everyone who at least once thought about improving the dynamics of her car, knows what chip tuning is.

Slipping the electronic motor control unit, you can get a small increase to the power without loss of resource. The advantage of this method of tuning is that even the most modern systems The specialist can flash in just a few hours.

Causes and symptoms of faults

Factors provoking the failure of the components of the ECU:

jumps voltage boots;
mechanical damage (accident);
the impact of vibrations, moisture, entering technical fluids;
unsuccessful flashing.

OK.

Due to great importance for normal operation of cars, designers pay due attention to the reliability of the node under consideration. Most breakdowns become abnormal situations or an unsuccessful location. Similar problem is familiar to the owners Lada Kalina.. The electronic motor control unit in this model is installed under the stove radiator. If he starts to leak over time, the coolant falls inside the controller, disturbing its components.

Errors at the "firmware" can also fail the computer. In order to correctly reprogram the system, the software must be correctly considered. If the firmware is recognized incorrectly, the new security can "burn" the controller.

The main symptoms of malfunctions of the ECU include:

engine trimming, revolutions, lack of stable idling;
termination of power supply to certain electronic devices.

Recent signs are manifested when only part of the control module components are fail.

Troubleshooting

If such trouble happened on your car, the controller can be given to repair. Without proper experience and relevant knowledge, the node will not work independently. In case of unrestitution, the electronic unit control should be replaced with a new one.

Car performance options today have a different one. Gasoline I. diesel engines, various forms of management, the most unpredictable automatic technologies - All this is included in the standard set of not even the most expensive representatives of the modern market. But all new cars are equipped with the so-called ECU - an electronic control unit, also known in the people as an on-board computer. IN budget carsmobile ECU creates a number of unpleasant problems that are often associated with not too high quality parts and regular failure. important elements Control unit. Often the ECU fails due to the impossibility of normal management by all car systems. When repairing the ECU, it is important to take into account all the features of transport, its functional differences and structural features.

Today there are many types of electronic control units, so it makes sense to talk about any common features. Moreover, most cars have personal children's problems of an individual type. Control block problems can have one nature, but they arise for various reasons in each case. It is worth remembering that the normal functioning of the ECU is possible in the absence of a wet environment, directly entering water or physical influences on the computer. Therefore, in some budget cars, experts even recommend replacing the location of the control unit to more safe place. True, it is fraught with unpleasant problems in the form of complete rework of wiring.

The main functions and tasks of the ECU in your car

Let's start with the fact that there are many types of electronic control units, several similar modules are used in many modern cars. In the very first technological cars from Japan, control units were used separately for the engine, automatic transmission, full drive, as well as electrical system Management of all transport functions. Today, all these functions perform one on-board computer with maximum functionality. Under the term ECU can be understood as a separate engine control unit and a full-fledged complex of electronic devices, which include the following range of elements:

special engine control system to give it necessary number revolutions, quality control of the fuel mixture;
managing gearbox, switching modes, level of travel economy and other transmission work factors;
monitoring the operation of the full drive system, timely and operational switching of modes when traveling along a complex road;
ensuring the efficient use of all car resources, given the fuel, electric charge battery and resource of all aggregates;
control of electrical and electronic systems with automatic functions, as well as complex configuration modules;
the implementation of the car diagnostic functions that allow the driver to get operational information about what is the condition of the car.

Such features of the work of the ECU make this element one of the most important electronic components in the whole car. The engine's behavior depends on the computer's work, the ECU settings affect the operation of the box and each separately taken element of the machine. therefore correct settings on-board computer Very important for normal operation vehicle. It is by changing settings or full replacement The electronic control unit is possible a real change in the possibilities and potential of the power unit. So performs a car tuning chip in modern workshops.

The main breakdowns and problems in the control system of the ECU

Today there are more than two dozen major manufacturers in the world that produce control units for all popular transport brands. Individual block settings allow you to completely get rid of the "same" machines even with the same engine. The quality implementation of the control unit is a big task in the production of a car and developing its features. But it is not always possible to implement the high quality of the work of this block. The fact is that in budget cars there is a task of saving money when developing, which is very important for the manufacturer. Therefore, standard inexpensive control units may have a number of shortcomings:

bad protection against moisture ingress inside the body of the control body, which causes the oxidation of the contacts and the gradual failure of the unit;
low level of protection against shocks and other mechanical damage, a possible failure in a strong shaking during the trip;
availability of failures in the program that will entail the incorrect operation of the car, will increase the flow rate and reduce the engine power;
breakdown of certain parts of the ECU, which may unexpectedly reflect on the work of the car and all its systems;
implementing the most unpleasant scripts when, during a trip, the computer fails and blocks the operation of the car;
the lack of opportunities to adapt to the most difficult situations when the car works at the limit of possibilities.

This is only a list of basic common troubles that occur with the ECU. Individual problems may be happening that occur often with certain car models. Especially often, trouble happens in those cars in which the electronic control unit is installed from other models with minor modifications. Such features exist on budget transport, due to the economy on development, the manufacturer cannot provide the normal operation of all electronic systems. Ultimately, many owners inexpensive cars with gasoline injector engines It is quite allowed that the factory would be better than their car installed an old-kind carburetor without the computer and other complex electronics.

How to hold a chip tuning machine and increase power?

One way to improve the potential of the car is a chip tuning associated with changes in the settings of the ECU. This is a pretty simple procedure that is performed on any car service with computer equipment, but high-quality chip tuning is possible only on professional stands with modulating results. The fact is that modern garage masters perform a standard tuning of the car capabilities. In fact, each car needs an individual approach and measuring the necessary data. The procedure should look like this:

carrying out measurements of the real characteristics of the car on special stands;
performing the engine testing and boxes for the possibility of forcing;
occurs the future features of the car service, the periodicity of the replacement of parts;
forecasts for chip tuning, determining the number horse powerwhich can be won;
description possible problems with a car that will arise after tuning;
performing the procedure and again carrying out a car testing;
control of the results obtained on practical tests and tests.

So it is impossible to make tuning in the garage high enough, it is necessary to work professional equipment and an excellent understanding of the whole situation, its difficulties and unusual sides. Nevertheless, there are more democratic capabilities of chip tuning, which are used by many motorists who own budgetary techniques. This is about full shift ECU on the device of another manufacturer. Especially interesting is such a replacement if you can change the control unit to a better option. Then you will have to change the quality of the operation of the car, improve the reliability of all electronic systems, and at the same time get and brighter potential. We offer watch video about chip tuning car:

Let's sum up

A high-quality electronic control unit is a reliable operation of all car systems. If the ECU goes and works with interruptions, you will have to face troubles. It is especially dangerous when the diagnostic unit block fails. Then the car does not signal any possible problems. However, other modules of the ECU, who failed, also nothing good for the driver. It is necessary to try to avoid these troubles, using regular testing of a computer system and verifying the real security of its operation.

If you decide to hold a chip tuning by performing a rather difficult operation with an electronic system of your car, it is worth considering all possible troubles of this process. Today, you can spend tuning the possibilities of the car in fact in any garage service station, but such an action will lead to the fact that transport simply will not be able to function normally due to the inconsistency of the settings of the actual data on the technical part. Have you ever wondered about chip tuning your car?

Almost everyone gasoline engines modern cars have injected 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. Special complex processes occur in the ECU of cars, "stuffing" 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 the composition of exhaust gases, and 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 good accommodation 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 .

Electronic control unit - a device to be equipped with each modern car. Its presence provides high-quality control over important aggregates and nodes of the machine.

Description of the device ECU.

The electronic control unit is a device that allows you to receive and process data served from different regulators and car sensors. The procedure for processing information is performed according to a specific algorithm laid down by the developer. After that, executing commands are formed transmitted to the corresponding nodes and units.

Thanks to the installation of the electronic control unit in the car, the consumer has the ability to optimize the main indicators of the machine motor operation:

torque;
main power indicators;
exhaust gas composition;
fuel consumption, etc.

Due to the presence of electronics, the consumer has the ability to diagnose all automotive units and nodes. Program control is provided when working both on gasoline and a diesel engine.

The main functions of the electronic engine control unit in the car

The electronic module collects data from the following devices:

the temperature controller moves and air if the latter is installed on the machine;
fuel level controller;
oxygen supply regulator to engine cylinders;
speed controller;
sensor idling;
information from the sensors of stabilization, ABS systems, antisolisms, as well as other security controllers;
data from the sensor position of the crankshaft and adjustment shafts;
controller of the position of DPDZ and gas pedal;
sensor monitoring the volume of the cooling fluid in the system;
power supply voltage sensor machine;
data from electrical steering electrical control or GUR.

This is a slight amount of information that the module processes on an ongoing basis. The more electronics are installed in the car, the greater the list of controllers with which the device works. In SUVs and crossovers, the block collects data from systems pneumatic suspension. When receiving and processing data, the electronic module transmits commands to support the operation of machine systems.

In fact, the module always monitors the operation of the systems:

injection of the injection force unit;
air supply to the engine;
ignition;
control volume harmful substances in the composition of exhaust gases;
control system of gas distribution;
control automatic transmission;
support required level temperatures;
lighting devices of both external and internal;
heating salon, as well as air conditioning;
electric motor windows system.

A detailed overview of the possibilities of the electronic module is represented by the Canal World of Matzov.

Together with the ECU in the car, depending on the manufacturer, can be used:

body definition unit;
module for synchronization of gearbox components;
block control unit brake system;
connection module nodes passive security etc.

Components of the electronic motor control unit

No matter what type of device is installed on the car and where the module is located, all its component elements are conditionally separated into two blocks:

software part;
hardware component.

Visually, the electronic module is a fee installed in a plastic or metal case to ensure efficient block protection. The device itself is mounted in open space Either the cabin of the car, in the dashboard area or opposite the passenger chair. Mounting site ECU is usually indicated in the service documentation for the car. Structurally, the board itself consists of a microprocessor, as well as a storage device. The module is equipped with several connectors, they are usually two.

Directly on the device board there are several memory modules. There is a constant where information about the operation of basic firmware is stored, also the main parameters are recorded here to ensure efficient operation of the motor. The diagram has a RAM module, its presence provides the ability to quickly process the supplied information from controllers. Also in this memory briefly stored some of the results of diagnosis and processing. Data from memory of the storage module can be deleted.

ECU design scheme

Software

The software component of the device includes several modules:

Control. Designed to check and adjust the parameters of the departing signals. The software component may, if necessary, stop the operation of the engine.
Functional. This part is designed to obtain pulse data, which are fed to the electronic module from different controllers and sensors. After receiving, the functional component of the computer performs the processing of information and the formation of commands that are sent to the executive components.

Hardware

The hardware component of the block includes a plurality of electronic elements, we are talking about microprocessors and other modules. This part includes an analog-to-digital converter, which catches analog pulses. After their reception, the signals are converted into a digital format to which the microprocessor is oriented. If the reverse transformation of the pulses is required, the converter device performs this function. In addition, pulses passing through the converting component and varying from analog format in digital are supplied to the electronic module.

Principle of operation and features of the module

The operation of the electronic module consists in receiving data from different controllers, the number of which can be about twenty.

In addition to processing data, the computer transmits signals to nodes and aggregates:

Ignition systems. Depending on the type, one coil can be applied or several. This system is designed for timely activation of the spark in the cylinders of the power unit.
Diode indicators. Designed to issue information about the availability of possible errors. It is not only about the operation of the motor, but also the module itself.
Nozzle. With their help, fuel injection is performed in the Cylinders of the DVS. It should be borne in mind that the frequency of shufflength change regularly changes, since it all depends on certain working conditions. Initially, the ECU collects data on the characteristics of the nozzles.
Testers. Devices for checking systems and mechanisms are connected to the electronic module by plug. The need to connect may appear to test the machine motor or transmission using a computer or specialized scanners.

Twiccles Channel Show spoke about the principle of the electronic module.

The main advantages and disadvantages of the ECU

Despite the presence of many advantages, electronic modules have disadvantages.

Advantages of EBU

Promotions:

the ability to optimize the dynamic parameters of the engine;
reduced fuel consumption at proper adjustment air and fuel ratio;
easy to start a power unit - the module quickly adapts the engine to work in different conditions, for example, when operating at idle;
when installing the ECU in the car, the car owner disappears the need for manual adjustment of the parameters of the engine;
an increase in the indicators of eco-friendly purity in proper adjustment of the volumes of harmful substances in the exhaust gases.

Disadvantages of the EBU.

Cons of electronic modules:

high price of component elements if the need for repairing the module;
in case of failures, the block is often not subject to repair, it is necessary to change it entirely;
the need to operate the cheap and complex equipment for checking the module, sometimes qualified wizards are required for diagnostics;
increased requirements of power supply reliability parameters - voltage jumps can lead to a breakdown of the ECU;
the need to use only quality fuel when refilling the machine.

The Avto-Blogger canal spoke in detail about the features and disadvantages of electronic modules.

Signs of failure of the electronic control unit

According to statistics, the problems in the operation of the electronic control unit are due to errors in the operation of devices.

Causes and symptoms of faults

Causes that can lead to the failure of the ECU:

cursting the engine of the machine from the car with the underlying power unit;
errors made when connecting the AKB, in particular, we are talking about the mileage of the polarities of the terminals;
installation of the anti-theft system with a unskilled specialist who led to installation errors;
disassembling battery clips with engineered;
activation of the starter device with a shut-off power supply;
the negative impact of moisture on the ECU, if the liquid fell inside the device, on the board itself;
damage to the electrocups to which the electronic module is connected, or a closure on the electrolyney section;
random connection of the electrode when performing welding work on the electrical panel or controllers installed on the car;
mechanical damage to the device that may occur in the event of an accident;
errors made when flashing the device;
faults in the work of the high-voltage component of the ignition system - distribution devices, cables, coils, etc.

Signs for which you can define a malfunction in the operation of the unit:

the electronic module stopped responding to signals fed from temperature controllers, oxygen regulator and throttle position;
the car engine has ceased to launch or have problems in its control;
when the power unit is functioning, blocking clutch systems, door locks, etc.;
signals from actuators were stopped on the computer - idling sensors, ignition systems, fuel pump, nozzle control systems, etc.;
various mechanical plan malfunctions are out of installation of electronic devices, burned electrical conductors, etc.;
motor Trojection Machine;
on the electronic devices and equipment stopped feeding power;
errors are constantly displayed on the on-board computer or dashboard.

Channel Garage demonstrated procedure computer diagnostics Module and reset mistakes in garage conditions.

Troubleshooting

Each module is equipped with a verification system, which allows you to diagnose the degree of malfunction of the unit in the garage conditions. To check, the car owner must connect to the module by means of a computer, to which the diagnostic software is installed in advance. It is allowed to use testers and scanners for checking. Information that is obtained in the diagnostic process must be compared with the normalized parameters.

All the reasons for the appearance of problems in the ECU are divided into two types - malfunctions in the functioning of the firmware or non-working conductors.

You can restore the software by flashing the module, only wizards with work experience will be able to fulfill this task. Checking electrical readings can be made in garage conditions by using a multimeter. To find a breakdown in electrocups, the car owner must deal with the operating scheme of the computer, it will be different depending on the model of the installed module.

After determining the place of installation of conductors, power cable and resistor elements, an electrocuprup call is performed. The check is subject to a plot where the ECU testimony errors were revealed. If the check did not give results, the transclon of all electrical caps on the instrument diagram is carried out. Some consumers after the error detection are disconnected by the battery terminal, believing that it will delete the error code from the memory.

It is impossible to get rid of a malfunction in the ECU that only the error code will be deleted from the device's memory of the device, the malfunction itself will remain.

The repair of the electronic module is performed through the following actions:

Detection of the place of damage in the functioning of the module.
Re-measure resistance parameters.
Search for a fastening point of the electrical conductory.
Connecting the cable with the desired resistance in parallel with the soldering iron. Old wire can not be disconnected.

If it did not help get rid of errors in the operation of the module, you need to seek help to the masters. The quality of the repair of the block affects its operation resource, as well as the safety of the machine as a whole.

Video "Repair of an electronic module with your own hands"

The car channel clearly showed the procedure for performing the repair of the Module of the DVS control module in the garage conditions.

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