How does an electronic gas pedal work, how do its advantages and disadvantages manifest itself, what malfunctions are most common, and how to deal with them? All these questions are very relevant, because today many car manufacturers have replaced the traditional cable drive with a more modern electronic pedal.

Electronic gas pedal - how does it work?

Modern technologies are aimed at making our lives as easy as possible. On the one hand, this is a huge plus, but on the other hand, they simply deprive us of the opportunity to make any decision, or rather, correct it, and in such a way that it is not always possible to achieve the desired result. This is clearly seen in the operation of the electronic pedal, which is so popular in modern automotive industry. Although for those who feel insecure behind the wheel, and even more so do not delve into the technical nuances of the car, this innovation is only a plus.

The principle of operation of the electronic gas pedal is as follows: after the driver presses the accelerator, data on the pressure angles immediately enter the control unit through special sensors. Next comes the move ECU, which calculates the required opening angle, and the drive, based on the data received, opens it to this angle. Moreover, if it is suddenly necessary to change the value of this angle (for a more economical mode or for safety), then the control unit does this itself, without receiving the appropriate command. It turns out that the driver cannot 100% regulate this process.

When do you need to replace the electronic gas pedal?

Due to the fact that this is an electronic drive, the main malfunctions in it are associated with electronics. Two sensors are built into the pedal bracket, which transmit commands to the control unit. If one of these sensors fails, then the light on the panel will light up, which is responsible for the health of the engine control system. In this case, the ECU goes into standby mode (revs increase much more slowly). If two sensors fail, then the emergency mode will turn on, and the engine will work as on. Since the sensors cannot be repaired, the electronic gas pedal must be replaced.

The wiring may also be damaged, and then the operation of the throttle is disrupted. If the electric engine is worn out, then an error is also displayed on the monitor indicating an accident. These damages can be repaired, but if the accelerator of the electronic gas pedal, which is responsible for the dynamics of the car, is out of order, then this part should be immediately replaced with a new one. How to do this, we will consider a little lower.

Repair of the electronic gas pedal - we fix the breakdowns ourselves

Basically, in case of any problems, the replacement of the entire assembly as a whole is required. But before embarking on such decisive action, it would not hurt to find out the cause of the breakdown. To do this, of course, you should read the information on how to check the electronic gas pedal. To do this, it is necessary to disconnect the block and sensors, and then, unscrewing the fixing nuts, dismantle the pedal.

Directly for verification, you will need a multimeter: by connecting it to different terminals, we monitor the change in electrical resistance. It should decrease smoothly, but if jumps are observed, then the part is faulty.

In some cases, it is also possible to repair the electronic gas pedal, for example, if the wiring is damaged. So, having discovered a defect (the insulation is broken, the wires themselves are damaged, etc.), you need to act according to the following scheme. Having freed the axis of fastening of the gear, remove the harness. To do this, unsolder the wires, release the bracket and pull out the cable. Then we replace the wires, and, having disassembled the connector under the pedal, we solder them. Now you can assemble the damper and drive safely.

If the car reacts to pressing the accelerator, so to speak, “with a delay”, then a spur (electronic corrector) of the gas pedal is needed. This device allows you to reduce the interval between pressing and opening the damper to a minimum. This is a separate module that connects to the sensors and converts the signals from them through the microprocessor, and then feeds them to the controller.

So we see that the electronic gas pedal, tuning of which is possible in any specialized center, on the one hand, is a clear result of progress, and on the other, it somewhat limits our desires. True, if you do not belong to the category of those people who need to “ride with the breeze”, but prefer to drive carefully with minimal fuel consumption, then this option will be just for you.

New Nissan vehicles are equipped with electronic throttles. From the electronic throttle depends on the air supply necessary for optimal operation of the motor. Also, the electronic throttle regulates idling and warm-up speed of the motor. Usually, after removing the battery terminal, or some kind of repair associated with disconnecting the engine wiring or flushing, cleaning the electronic throttle, or with a breakdown of the engine injection control system, problems associated with idle speed appear.

The engine speed starts to float, the engine does not work stably at idle, while the car can drive, it will start. Often, owners of such Nissans or repairmen may think that this is a malfunction - some kind of breakdown, defect, or something incorrectly assembled. But in fact there is no malfunction, and all the components of the car are assembled correctly. The whole problem lies in the failure of the electronics, namely the need to teach the throttle to work properly and idle. The learning procedure itself does not require any equipment and the adaptation (learning) of the throttle on a Nissan is available to anyone. But in the procedure itself, the accuracy of all points must be observed. But even the availability of information about the learning process does not make the procedure simple. Diagnostic equipment, with throttle mismatch and with an increase in idle speed at the motor, does not reveal any defects. And very often, even repairmen cannot explain the reason for the sudden increase in idle speed. After proper training, the motor operates in the range of 700-800 rpm. The electronic throttle is very sensitive to dirt deposits and resins that are deposited on it during the operation of the machine. Because of this, the idle speed of the motor begins to float or hang. And also the response of the motor to the gas pedal during acceleration is less sensitive. Therefore, cleaning the throttle is a must. But if the throttle is very dirty, after cleaning it, the throttle mismatch occurs - and as a result, floating and incorrect revolutions. It is impossible not to clean the throttle - in the end the motor will not work correctly. If you have the opportunity, clean the electronic throttle in time - once every 15,000 km. If for some reason you removed the connector from the electronic throttle, from the battery, or from the Nissan engine control unit, you will have to carry out the throttle adaptation procedure.

Training procedure

1. First we must teach the released position of the accelerator pedal.

2. Make sure the accelerator pedal is fully released.

3. Turn the ignition to the ON position and wait at least 2 seconds

5. Turn the ignition to the ON position and wait at least 2 seconds

6. Turn the ignition key to the OFF position and wait at least 10 seconds

7. End

Throttle closed learning

1. Make sure the accelerator pedal is fully released.

2. Turn the ignition to the ON position

3. And immediately turn the ignition key to the OFF position and wait at least 10 seconds, during this time the damper will move.

Teaching air supply at idle speed

1. The engine and gearbox must be warmed up to operating temperature

2. All consumers of electricity are turned off

3. Start the engine and warm it up to operating temperature

4. Turn the ignition key to the OFF position and wait at least 10 seconds

5. Make sure the accelerator pedal is fully released.

6. Turn the ignition to the ON position and wait at least 3 seconds

7. Quickly within 5 seconds - fully depress and release the accelerator pedal 5 times

8. Wait 7 seconds

9. Fully depress the accelerator pedal for about 20 seconds until the CHECK indicator stops flashing and stays on

10. Fully release the accelerator pedal within 3 seconds when the CHECK indicator lights up constantly

11. Start the engine and let it run at idle

12. Wait 20 seconds

13. Press the gas pedal 2-3 times and make sure that XX is normal

All procedures must be carried out exactly on time, the main thing is not too early to press the gas pedal and press and release it quickly.

Read 23432 once

The importance of the throttle adaptation procedure is difficult to underestimate, and not every motorist knows how to perform this operation on their own.

1

During the operation of the throttle assembly of any modern vehicle, a lot of contaminants in the form of dust, soot, and oil gradually accumulate on the surface of the throttle. They form a layer of dirt, which makes the air gap between the damper and the car air duct less than the established norm. This gap is important for the normal functioning of the "heart" of the car, because thanks to it the idle speed is maintained at the required level.

When it decreases, the electronic control unit of the vehicle (car computer) slightly opens the damper by introducing coefficients that take into account changes in its cross section. Up to a certain point, the ECU manages to maintain the air gap at a constant level, but sooner or later it will still have to be cleaned of dirt. After flushing this unit, the engine speed will necessarily increase due to the fact that the cross section of the throttle, freed from the polluting layer, will become larger.

The procedure for returning to the initial (set by the manufacturer) position of the damper is usually called its training or adaptation.

2

The need for such an operation, which involves bringing to a standard high idle speed, arises not only after flushing the throttle assembly, but also in other cases, in particular, in the following:

• after a complete discharge of the vehicle battery;
• after replacing or removing the accelerator pedal;
• after replacing or reconnecting the electronic control unit of the vehicle.

Undoubted signs signaling that it is required to immediately train the damper are the following phenomena:

• whistle during regassing;
• inadequate behavior of the motor at idle;
• lack of power at idle or failures.

3 Conditions for carrying out the idle adaptation process

Before starting training, you must fulfill a number of prerequisites:

• travel by car for 10 minutes;
• ensure the battery voltage at idle is not less than 12.9 V;
• warm up the gearbox
• the wheels of the vehicle must be straight, the steering wheel is in the middle position;
• engine temperature - 70–95 ° С;
• all devices that exert a load on the electrical network of the machine (heated windows, headlights, and so on) should be turned off;
• the automatic transmission selector is set to N or P.

4

It is advisable to perform the adaptation of these devices before you teach idling. If the cable of the sensor that sends a signal about the position of the accelerator pedal has been disconnected, the following steps must be taken:

1. Release the pedal completely.
2. Turn the ignition key to "ON", wait at least two seconds;
3. Turn off the ignition, hold for 10 seconds;
4. Repeat the procedure according to paragraph 2, and after and according to paragraph 3.

The described procedure (agree, quite simple) will teach the damper to open correctly. But to adapt the valve to the "Closed" position, perform the following operations:

1. Release (completely) the accelerator pedal.
2. Turn the key to the "ON" position.
3. Switch the ignition to "OFF" and wait 10 seconds.
4. We make sure that the valve lever moves for 10 seconds (the characteristic sound indicates that there is movement).

5

Now you can proceed directly to learning to idle, "armed" with a stopwatch and some patience. The procedure is performed like this:

• The engine starts and warms up to standard operating temperature.
• The ignition is turned off, no action is taken for 10 seconds.
• The ignition is turned on (the accelerator pedal is in the released position), we wait 3 seconds.
• The following actions are performed five times in a row: the accelerator pedal is fully depressed and fully released.
• After 7 seconds, the pedal is pressed again (fully) and maintained in this state for 20 seconds.
• Fully (and at the same time without delay) the pedal is released at the moment when the malfunction indicator on the panel stops flashing (it should burn with a steady light).
• Then immediately, without touching the accelerator pedal, you need to start the engine so that it functions at idle.
• We are waiting for about 20 seconds.

After all the voiced actions, we accelerate the engine (2-3 times) and make sure that the standards for the ignition timing and idle speed are met. On this, the damper adaptation procedure can be considered completed.

Modern technology has now touched almost all parts of the car. If earlier the gas pedal drive was exclusively mechanical, now it is being replaced by an electronic one. In this article, you will learn what an electronic gas pedal is, how it works, how it is adjusted and repaired.

Device and principle of operation

To understand how the electronic gas pedal works, you need to know the general principle of the accelerator. The fact is that their functions are extremely similar, but the simplest mechanism is precisely the mechanical drive.

The accelerator pedal, or as it is commonly called - "gas", is a means of controlling the throttle position.

The throttle valve, in turn, is responsible for the amount of air supplied to the engine intake manifold. The more oxygen enters the combustion chamber, the higher the crankshaft speed. The pedal is a lever that acts on the damper actuator. The drive can be cable or lever. All this, one way or another, facilitates the effort applied to press the gas pedal.

The principle of operation of the electronic pedal is a bit complicated, but it makes it much easier to control the engine speed. Such a pedal is used only on injection cars, as it is completely based on the operation of electronic devices. The accelerator includes: pedal module, signal conversion module and throttle position control unit.

When you press the pedal, the module transmits information about the angle of deflection of the lever to the signal conversion module. The transistor system sends an amplified signal to the throttle control unit. After matching the received signal with the electronic control unit, the throttle valve module determines the angle of its opening. Thus, an electronic method of opening the throttle valve is provided.

It is worth noting that the operation of the damper module cannot begin until permission is received from the ECU. The fact is that this system must know exactly how much air and fuel the engine needs in a given mode of operation. Therefore, the position of the damper can change regardless of how much the accelerator pedal is depressed.

How to adjust the electronic pedal

Like any mechanism, the electronic gas pedal sometimes also needs to be adjusted. This event is necessary to maintain the normal operation of the accelerator in case the settings have been lost.

Sometimes it happens that when you press the gas pedal, the car stops responding to a change in throttle position. This is due to the fact that there was simply no change in the situation. All electronic pedals have a certain free play, during which the voltage supplied to the transistor circuit changes. If the voltage changes, then the reaction to the position of the pedal also changes, therefore, the car may not behave adequately at. Sometimes this problem can be recognized by the corresponding indicator on the dashboard or by using electronic diagnostics carried out through the vehicle's on-board computer.

Adjustment procedure:

• First of all, you need to remove the pedal from the seat. This means that when the pedal is removed, the angle measurement module is also dismantled with it. The plug connector must be left in place, as power to the pedal will be needed during the adjustment process.
• Once the pedal is released, unscrew the screw located on its cover. Thus, you need to release the cover relative to the pedal, allowing it to rotate freely. Next, you'll need the reference literature that came with the pedal.
• Connect a voltmeter between the connectors and set it to the appropriate measurement range. Turn on the ignition. The manual for the pedal has voltage standards that will be different for a diesel and injection engine. By turning the pedal cover, you can change the input voltage. Adjust this setting according to the documentation and tighten the fastening screw.
• Install the pedal in place and try it out. If the behavior of the car has changed for the better, then the adjustment of the electronic gas pedal has been carried out correctly.

Attention! Reference literature may indicate the voltage range. Two numbers determine the amount of tension when the pedal is not depressed and fully depressed. Therefore, the adjustment is made according to the first voltage with the gas pedal not depressed.

In addition, the voltage value may vary depending on the environment. That is, during seasonal maintenance of the car, it is also strongly recommended to adjust the gas pedals, since this value can change, inversely proportional to the changing resistance.

Video - Converting an electronic gas pedal into a mechanical one

Repair of the accelerator with an electronic drive is carried out on the basis of detected faults. Like all parts, such a system also has a certain amount of wear, the occurrence of which cannot be prevented. In this regard, it is important to know how to troubleshoot when the electronic gas pedal breaks down.

Usually, the repair of the pedal is started when the following malfunctions are detected: there is a short-term failure of the reaction to a change in the position of the pedal or a complete failure of the pedal, regardless of the angle of depression. Basically, these malfunctions are associated with a lack of power to the executive bodies, or the absence of a signal from the pedal module.

First of all, it is necessary to inspect the electrical wiring for spillage, damage to the insulation (short circuits) and lack of contact in plug connections. Very often, due to the fault of the wires, power is lost on the responsible organs and the pedal simply refuses to work. If defective electrical conductors are found, they must be replaced immediately.

Another malfunction is related to breakdown. This error is displayed in the form of a special code "022", or, as it is also called, "throttle failure". In this case, the motor must be checked. To do this, it is dismantled and connected to a source of electrical energy directly in accordance with the rated current and voltage. If the motor rotates, then the fault must be sought elsewhere, although such cases are rare. If the motor does not rotate, then it must be replaced.

All other malfunctions are eliminated by replacing the entire module, since their repair is rather complicated and impractical. In fact, it is easier and cheaper to replace the entire part than to repair it.

This is everything the driver needs to know about the electronic throttle control pedal. We hope that this article has helped you understand this complex and confusing mechanism.

In order for the car to work properly and not appear at the service station for as long as possible, with the exception of maintenance cases, it is necessary to be attentive to it. One of the important nodes of the iron horse is the throttle valve (DZ). This mechanism plays an important role in the operation of a diesel or gasoline engine. And it doesn’t matter if it’s a carburetor power plant or an injection one. DZ can be either mechanically or electronically driven. In the latter case, it sometimes becomes necessary to adapt the throttle valve. How to do it? Let's try to figure it out, at the same time we will take a closer look at the types of this node. We will also find out whether it is necessary to do this, and what might happen otherwise.

Throttle valve assignment

Not a single car in the world can do without such a unit as a throttle valve. The mechanism is a transverse channel regulator that changes the amount of liquid or gas flowing. That is, at its core, the damper is an air valve. When it is closed, the pressure in the intake system is equal to vacuum, and when it is open, it is compared with the outside atmospheric pressure.

By pressing the accelerator pedal, the degree of opening of the damper is adjusted. Accordingly, it depends on how much air enters the engine cylinders. Almost every modern car is equipped with an injection engine, where all important duties are taken over by

As some motorists know, the optimal ratio of gasoline and air is 1:14.7. By determining the position of the throttle valve and the amount of air using sensors, the ECU regulates the operation of the injectors and the fuel pump. This knowledge will come in handy in deciding how to adapt the throttle.

In other words, the computer gives the command how much fuel to feed into the engine in order to maintain the optimal proportions.

Mechanical throttle

Currently, a mechanically driven damper can only be found in a budget car. In such a mechanism, the damper is connected to the accelerator pedal by means of a metal cable, fixed to the shaft and placed in a housing, which also contains sensors:

• throttle position (TPDZ).

All this looks like a separate block. Various pipes also lead to it, one by one the coolant is supplied and removed, and through the others the crankcase is ventilated and fuel vapors are captured.

Thanks to the IAC, when the damper is closed, the required number of revolutions of the crankshaft is maintained. The regulator itself consists of a stepper motor and a special valve. Together they adjust the amount of air, and, regardless of what position the throttle is in. Usually there is no problem regarding how to adapt the throttle in the case of a mechanical drive.

Electromagnetic throttle

An electronic analog, unlike a mechanical unit, allows you to achieve the optimal torque value in any engine operating mode. The level of fuel consumed is reduced, and driving in such a car is comfortable and safe. The main distinguishing features (and in this case, advantages) are the following:

• idle speed is controlled by moving the throttle;
• there is no mechanical connection between the pedal and the damper.

Due to the fact that there is no mechanical connection, the torque can be controlled electronically instead of the gas pedal. The damper module itself consists of the following elements:

• corps;
• damper itself;
• electric drive;
• return spring mechanism;
• damper position sensors.

Installing not one, but two damper position sensors in the module will improve reliability. For this, magnetoresistive devices or potentiometers having sliding contacts can be used. Just because of the breakdown of these elements, it is necessary to decide how to adapt the throttle on many cars.

In the event of a malfunction of the electric drive, due to the reciprocating spring mechanism, the damper is brought to an emergency position. In this case, the module itself must be replaced, which is done only as an assembly.

Throttle valve clogging and cleaning intervals

From time to time, the throttle valve inevitably becomes clogged, which manifests itself in various ways. In this regard, a reasonable question arises: how often should it be cleaned? It is not entirely possible to answer it unambiguously, since there are no recommendations on this matter. Some car owners visit auto repair shops when they suspect an engine problem.

Someone thinks that the damper needs to be cleaned after every 40,000-50,000 km of run. Others have a different opinion and clean the damper more often, after 30,000-40,000 kilometers.

Usually, black deposits on the damper indicate poor fuel quality. During the operation of a car with such gasoline, there is a risk of oily deposits. After that, there should be no question whether the throttle valve needs to be adapted.

As a rule, if the piston group experiences some problems, then a characteristic symptom is the coking of the damper with soot with oily impurities. Sometimes this indicates clogging of crankcase ventilation.

Signs of a clogged damper

When the throttle is clogged, the engine starts to run in an unstable mode. The characteristic symptoms of a malfunction in this case are:

• increased idle speed;
• delayed reaction of the engine to pressing the accelerator pedal;
• jerks are observed during the movement of the car, and sometimes the vehicle changes speed on its own, without the participation of the driver;
• abrupt release causes the power plant to stop.

In some cases, the CHECK indicator on the dashboard lights up. Sometimes tar deposits settle on the throttle shaft, causing it to stick. Then the gas pedal is pressed with a noticeable effort.

Before moving on to solving the problem of how to adapt the throttle on a Skoda or any other car, you need to make sure that the diagnosis is accurate by conducting a visual inspection of the mechanism. To do this, you need to remove everything that is possible in order to open access to the module. Care must be taken not to accidentally disconnect

DZ cleaning

If the cause of unstable engine operation is a dirty damper, it is worth moving on to cleaning it. To do this, you can contact a reliable service station. Among the large number of workshops, you can find one that specializes in specific brands (Audi, Volkswagen, Toyota, Mercedes and others). However, the owner can do all the work on his own, since much experience and skills are not required in this matter.

At service stations, the cost of the procedure may depend on a number of factors:

• the complexity of the work - for some cars, access to the remote sensing will require the dismantling of many parts;
• the service level of service stations - as a rule, the larger the organization, the more expensive;
• location - in large metropolitan areas you can leave more money than in the periphery.

Cleaning the remote control is a simple procedure, after which you usually need to think about how to adapt the throttle on a Nissan or any other car.

Any car owner can perform this procedure on their own. It does not require special knowledge and skills. All you need to get to the damper is tools and rags (preferably soft ones). Also, you can not do without a special tool - the carburetor cleaner "Carbcleaner" (CARB Cleaner) is mainly used.

Self cleansing procedure

If the damper is electronically actuated, then it is better to remove the negative terminal of the battery. Then everything can be done according to a simple instruction:

• dismantle the air filter, for which unwind the pipe clamp;
• disconnect all connectors of the throttle module and other pipes;
• move the air filter receiver to the side so as not to interfere, and start cleaning the damper;
• upon completion, assemble the damper module in reverse order, checking whether everything is in its place;
• after assembly, start the engine and check the idle speed.

In some cases, before starting to adapt the throttle on a Toyota, Nissan or Skoda, it is necessary to remove the throttle itself, which allows you to completely clean the throttle. This will require a 5mm hexagon to unscrew the 4 fasteners. Remove the throttle with great care, as there is a risk of damaging the gasket.

If, after cleaning the DZ, increased idle speeds are observed, then it is necessary to adapt the damper. About what it is, further in the topic of the article.

The need to adapt remote sensing

This definition refers to the operation (or learning) that is carried out so that the ECU “knows” what position the throttle is in relative to the degree of depression of the accelerator pedal. This procedure is simply necessary for unstable engine idling.

For most Toyota, Lexus, Mercedes, Nissan, Audi cars, it is necessary to adapt the throttle valve, as this allows you to eliminate the malfunction. The procedure is performed in the following cases:

• in case of a critical voltage drop of the on-board network (the battery is disconnected or completely discharged);
• the computer was replaced;
• the damper was cleaned with the throttle removed;
• when replacing the throttle module itself;
• the accelerator pedal was replaced, usually electronic.

It is worth noting that due to a layer of dirt, the gap between the remote control and the body changes, and after cleaning the damper, its position has changed. But the ECU "does not know" about this and continues to manage the fuel supply according to the previous indications (before the cleaning operation). Adaptation will completely eliminate this gap and restore engine performance.

The simplest way to adapt

Now the question of whether it is necessary to adapt the throttle after cleaning should definitely not arise, if there were still doubts. The easiest way to carry out the operation is by simply resetting. Only for a start it is worth warming up the engine well to operating temperature, for which it is necessary to make a short trip. Then, turning off the engine, disconnect the negative terminal of the battery and wait. Depending on the brand of car, the waiting time can be 10-30 seconds or 15-20 minutes.

During this period, all ECU parameters should return to their original (factory) settings. Then it remains to connect the terminal and start the engine - the speed should return to normal.

Adaptation on the example of some cars

Another method, which we will consider using the example of a well-known German brand, also involves adaptation without a computer. Here you should warm up the engine to a temperature of approximately 70-99 ° C. The battery voltage must be at least 12.9 volts with the engine off. The scheme of actions on how to adapt the throttle on a Volkswagen will be something like this:

• Warming up and turning off the engine, you should wait a short period (5-10 s.).
• With the gas pedal released, turn on the ignition and wait 3 seconds.
• After 3 seconds, you need to press the accelerator pedal 5 times to the stop and release it back. Act quickly, as it only takes 5 seconds.
• After the 5th exercise, it is worth waiting for a pause.
• After 7 seconds, press the pedal again to the stop and keep it in this position until the “CHEK” indicator starts flashing (≈ 10 s.), Then it should be constantly on (another ≈ 20 s.).
• When the indicator stays on, count to three and only then release the pedal.
• Start the engine (repeat if necessary), wait a pause of 20 seconds, then slightly accelerate (2000-3500). If at XX the tachometer shows 700 rpm (+ - 50), then the adaptation was successful.

In this case, it is necessary to strictly adhere to the time intervals of each setting step. Only in this way the ECU training will go smoothly. But before that, it is worth exploring the features of adaptation and the possibility of a manual procedure for your car. Perhaps only service stations can help.