Our service center is often visited by GAZelle cars, because this is a commercial vehicle that plows like a workhorse day and night. Every day, many GAZelles hit the roads of our country and sooner or later certain breakdowns arise, which we try to eliminate! Today is no exception. A GAZelle Business with a UMZ engine came to our repair area! Well, let's help business!

After listening to the client: the car does not pull, the check light is on. After you turn the ignition off and on again, the car sometimes starts to work as it should, but then the problem repeats. The rpms don't rise above 2000...

Here it is, a workhorse!

Fig.1

Where to start repairs? Of course, with computer diagnostics. We connect the diagnostic equipment and read the errors that are registered in the engine control unit.

Fig.2

We are interested in the current error P2138 Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Correlation. What does it mean? This error literally stands for: P2138 Incorrect voltage ratio "D"/"E" of the throttle position sensor or accelerator pedal. Our throttle valve is electronic, as is the gas pedal. That is, both the damper itself and the pedal may be faulty. In order to defect a pedal or throttle valve, you need to understand how they are designed, so first let’s look at their design features, structure and figure out what is the difference between a mechanical throttle valve and an electronic one.

The operating principle of the system with an electronic throttle valve and an electronic gas pedal.

And so, first of all, let’s look at the device of a mechanical throttle valve and figure out how the idle speed is adjusted.

Fig.3 Mechanical throttle (rpm 840..900)

In a mechanical throttle valve (Fig. 3), the idle speed control (4) is responsible for idle speed (engine speed). The throttle valve itself (penny 1) does not participate in idle speed control in any way. The idle speed control sets 55...65 steps (mikas 7.1) to maintain speed in the region of 800...900 rpm. The more steps the idle speed control has, the higher the engine speed will be, because... more air will flow through the bypass channel (3).

Fig.4 Mechanical throttle (rpm 1300..1400)

To maintain idle speed at 1300...1400, the idle speed controller (2) sets approximately 115...120 steps (Mikas 7.1). In this position, the regulator rod (4) increases the flow of air through the bypass channel (3), thereby increasing the speed.

But how does idle speed control work with an electronic throttle valve, and what parts does it consist of?
The GAZ electronic throttle valve consists of the following parts (Fig. 5): the valve itself (penny 1), a gear motor (2) that controls the valve (penny 1), and two resistive position sensors (3)

Fig.5 Electronic throttle (rpm 850..900)

Let us clarify that in cars with an electronic throttle valve there is no idle speed regulator as a separate part. The throttle valve itself is responsible for adjusting the idle speed (penny, 1). To maintain idle speed, the throttle valve opens slightly by 5...6% and the air that is needed to maintain idle speed passes through the valve itself (1). The damper is controlled by a gear motor (2). Sensors (3) read the current position of the damper.

Fig.6 Electronic throttle (rpm 1400..1500)

In order for the engine speed to increase to 1400....1500, the motor (2) opens the throttle valve by 10...12%. Thus, the electronic damper itself participates in the process of adjusting the idle speed. The electronic throttle must be kept clean, so in order to keep the engine speed from fluctuating, it needs to be cleaned much more often than a mechanical throttle.

If the mechanical throttle is controlled by a throttle cable, then who is responsible for controlling the electronic throttle? In order for the control unit to understand at what angle to open the throttle, it must first read the current position of the gas pedal. Our gas pedal is also electronic and consists of the pedal itself and two resistive sensors (R3, R4) Fig.7.

Let's consider Option 1. The gas pedal is not pressed.
The ignition is on, the gas pedal is not pressed, the throttle is turned to 7.8%, why not 0% you ask? We explain: because Since our throttle valve is electronic, the idle speed regulator, as you already understood, is missing, but we need air to ignite the mixture. It is precisely through the gap of 7.8% that this air enters during engine starting.

Fig.7 The ignition is on, the pedal is not pressed, the throttle is closed (ajar) by 7.8%.

What parameters can we observe with a working throttle valve and a working gas pedal?

Fig.8 Typical parameters for the values ​​of a working gas pedal and throttle valve (the pedal is not pressed)

Table 1. Indications of a working gas pedal and throttle valve (pedal not pressed)

	R3 ADC_DPS 1 (IN) 0.97 , R4 ADC_DPS 2 (IN) 0.49. To check the accuracy of the readings you need to know the following: readings R3 (ADC_DPS 1 (IN) 0.97 ) exactly 2 times more readings R4 (ADC_DPS 2 (IN) 0.49 ). We have R3(ADC_DPS 1 (IN) 0.97 ) / 2 = 0.485 (0.49), which corresponds to the value of R4 ( 0.49 V)
	0.78 , R2 ADC_ETS2(B) 4.22. 5 volt. We have R1(0.78) + R2(4.22) = 5 volts. This means that in the ignition on position (the pedal is not pressed) the throttle OK.

Let's consider Option 2. The gas pedal is pressed all the way.
The ignition is on, the gas pedal is pressed all the way, the throttle is turned to 24%. Why not 100% you ask? Well, that’s how the manufacturer built it into the program.

Fig.9 The ignition is on, the gas pedal is pressed all the way, the throttle is open 24%.

On the computer screen when the gas pedal is pressed, we observe the following parameters.

Fig.10 Typical parameters for the values ​​of a working gas and throttle pedal
dampers (pedal pressed all the way).

Table 2. Indications of a working gas pedal and throttle valve (pedal pressed all the way).

The gas pedal readings (highlighted in yellow) are the following parameters: ADC_DPS 1 (IN) 3.67 ,ADC_DPS 2 (IN) 1.84. To check the readings, as we have already said, divide R3 (ADC_DPS 1 (IN) 3.67 ) by 2 and we get 1.835 (1.84), which corresponds to the R4 ADC_DPS indicator 2 (IN) 1.84. This means that when the gas pedal is positioned to the floor, our gas pedal shows the correct values, which means it is working properly.

Throttle readings (highlighted in red) are parameters: ADC_ETS1(B) 1.42 , ADC_ETS2(V) 3.58 In total, the voltage R1+R2 of the throttle position sensors must correspond to 5 volt. We have R1(1.42) + R2(3.58) = 5 volts. This means that in the ignition on position (the gas pedal is pressed to the floor), the throttle valve shows the correct value, which means OK.

And so, we considered options for the operation of the throttle valve and gas pedal, provided that they are fully operational, but let’s return to our GAZELLE and the error P2138, which is written to the ECU memory when one of the values ​​does not match, we remind these values.

Working gas pedal: the gas pedal voltage R3 divided by 2 is equal to R4, i.e. R3/2 = R4.
Serviceable throttle valve: the sum of the voltage R1 and R2 of the throttle valve is 5V, i.e. R1+R2= 5v.

If one of these conditions is not met, then error P2138 appears - Incorrect voltage ratio "D"/"E" of the throttle position sensor or accelerator pedal. D and E in our case are R1, R2 and R3, R4, respectively. Therefore, in order to reject the gas pedal or electronic damper, you need to carry out the checks described above. Without wasting time, we begin to check our readings on the faulty car.

Checking the throttle and gas pedal readings of a faulty GAZelle car.

First, look at the voltage readings of the throttle valve and gas pedal with the car turned off and the ignition on. And what do we see?

Fig.11 The ignition is on, the pedal is not pressed.

Table 3. Indications of a defective gas pedal (pedal not pressed)

	R3 ADC_DPS 1 (IN) 0.98 , R4 ADC_DPS 2 (IN) 3.75. To detect defects you need to know the following: the readings of R3 are exactly 2 times greater than the readings of R4 for a working gas pedal. We have R3(ADC_DPS 1 (IN) 0.98 ) / 2 = 0.49 (0.49), which does not correspond to the value of R4 ( 3.75 V). This means that our gas drop shows “garbage” - the pedal is faulty.
	Throttle readings (highlighted in red) are the parameters: R1 ADC_ETS1(B) 0.78 , R2 ADC_ETS2(B) 4.22. In total, the voltage R1+R2 of the throttle position sensors must correspond to 5 volts at the correct throttle valve. We have R1(0.78) + R2(4.22) = 5 volts. This means that in the ignition on position (the pedal is not pressed) the throttle OK.

Fig.12 The ignition is on, the pedal is not pressed (the pedal is pressed all the way).

Table 4. Indications of a defective gas pedal (pedal pressed all the way).

	Indications of a defective gas pedal (highlighted in yellow) are the following parameters: R3 ADC_DPS 1 (IN) 3.72 , R4 ADC_DPS 2 (IN) 4.13. We check: R3(ADC_DPS 1 (IN) 3.72 ) / 2 = 1.86, which does not correspond to the value of R4 ( 4.13 V). This means that our gas drop, just like in the first case, shows “garbage” - the pedal is faulty.
	Throttle readings (highlighted in red) are the parameters: R1 ADC_ETS1(B) 0.80 , R2 ADC_ETS2(B) 4.21. We check: R1(0.80) + R2(4.21) = 5.01 volts. This means that in the ignition on position (the pedal is pressed all the way down) the throttle OK.

Pay attention to the throttle opening percentage on Figure 12. provided that the gas pedal is pressed all the way. Due to a faulty gas pedal, the ECU cannot detect that the gas pedal is pressed and therefore the throttle opening percentage will remain around 7.1%. If the gas pedal were in good working order, then the readings should correspond Figure 10.

Well, we have defected the electronic gas pedal. Let's start dismantling it, take it apart and find out what happened to it.

To disassemble the electronic gas pedal, you need to unscrew four screws.

Rice. 15. Unscrew the 4 screws.

Fig. 16. Remove the top cover with the board and resistors.

Here is a wiring diagram for our pedal.

Rice. 17. Connection diagram between the accelerator pedal and the ECU.

How is the connector on our gas pedal numbered?

1. red power supply +5 volts sensor 2 pedals
2. brown-orange power supply +5 volts for pedal sensor 1
3. brown-pink pedal sensor 1 signal
4. brown common sensor 1 pedal
5. red-pink common sensor 2 pedals
6. brown-green pedal sensor signal 2

Rice. 18. Pinout of gas pedal contacts.

Fig. 19. Gas pedal sensor board

On Figure 19 you can see a shiny (brushed) area (highlighted in green) on the resistive layer, due to the fact that the gas pedal slider is constantly moving forward and backward. Over time, this layer wears out a lot and the resistance of the coating becomes different, and that’s when miracles begin.

Sometimes the engine malfunctions and its speed is out of the specified values. As a result, the idle speed becomes unstable and loss of power occurs.

It seems that the engine will stall any minute. This is explained by wear of the part, and as a result, an increase in the gap between the throttle body and the valve. The broken gap allows more air to pass through than normal, and this causes a change in the composition of the fuel mixture.

The result is engine failure. When the valve (penny) wears out, it becomes necessary to replace it. Due to the simplicity of the design, it will not be difficult to order it from a familiar turner or find it on the Internet from some “Kulibin”. The price of the purchased part will be much higher.

Since new car models already come with electronic throttle control (electronic pedal), malfunctions in the vehicle’s electrical equipment can also lead to operational errors.

A sharp surge in voltage in the car network, removal/replacement of the electronic control unit, accelerator pedal - all this can cause a malfunction of this part of your car. Then it becomes necessary to return all parameters to normal.

Examples of throttle valve adaptation on VAG and Lancer IX vehicles

In this video, they will tell you and show you how to adapt the damper for a VAG car.

Adaptation of remote sensing for Volkswagen Golf 4:

• We warm up the engine to t=80 0 C and turn off the car. Then we connect the USB-KKL cable to the diagnostic connector and, after turning on the ignition, launch the diagnostic program (VAG-COM 3.11).
• We enter section 01-engine.
• We poll the fault memory (02).
• We erase detected faults (05).
• After returning to the previous menu, enter the “adaptation-10” section.
• If the group value is 001, press “start”.
• We wait 2-3 minutes, then close the program and disconnect the cable. Adaptation is complete.

Adaptation of remote sensing of Nissan cars with an electronic gas pedal:

• Turn on the ignition for at least 2 seconds.
• Turn off the ignition. The accelerator pedal adaptation procedure is completed.
• We are adapting the throttle valve. The accelerator pedal is released.
• Turn on the ignition and turn it off immediately. We wait at least 10 seconds. During this period of time, the damper moves.
• We teach air supply at idle speed (XX).
• Warm up the engine and gearbox to operating temperature.
• We turn off all electrical equipment of the car.
• We start the engine and bring it to operating temperature.
• Turn off the ignition and wait at least 10 seconds.
• Fully release the accelerator pedal.
• Turn on the ignition and wait at least 3 seconds.
• Within 5 seconds, press the accelerator pedal five times, then wait 7 seconds.
• Pressing the accelerator pedal, hold it until the CHECK stops flashing and lights up constantly (about 20 seconds are required).
• After the CHECK light comes on continuously, you must release the pedal within 3 seconds.
• We start the engine to run at XX.
• Press the pedal several times to check the stability of the XX.

Adaptation of remote sensing on VW Passat B5:

• Warm up the engine to operating temperature and turn off the car.
• We turn on the ignition, but do not start the engine.
• We connect the cable to the diagnostic connector and launch the program.
• We enter section 01-engine.
• We enter the basic settings (04).
• In the damper adaptation we select 060 for cars with electronic damper control, and value 098 for cars with cable-controlled damper.
• Let's start the adaptation.
• We are waiting for the “ADP RUN” entry to appear on the screen and the subsequent “ADP OK” entry.
• We return to the basic settings.
• Turn off the ignition. Adaptation is complete.

Mitsubishi Lancer IX throttle adaptation:

• Warm up the car engine.
• We connect the ScanDoc scanner to the diagnostic connector. IAC values ​​= 0.
• We artificially restore the thermal gap in the damper (for example, we use a mixture of grease and waste oil).
• We start the engine and wait for the setting of stable idle speed.
• In the scanner, we launch the “Sas mode” mode and adjust the position of the IAC during adaptation.
• If the engine stalls when turning on the “Sas mode” mode, then unscrew the IAC screw to increase the engine speed to XX;
• We set the speed within 750-800 rpm.
• During adaptation, the IAC steps are set to 4-7;
• We forcibly complete the adaptation process and turn off the engine.
• We start the engine and check the IAC. If the adaptation was successful, then the IAC steps will be 27-28.

Adaptation of remote sensing on Audi A4:

• We warm up the engine to t=80 0 C and turn off the car. Then we connect the cable to the diagnostic connector and, after turning on the ignition, launch the diagnostic program (VAG-COM).
• We enter section 01-engine.
• We enter the “Adaptation-10” section.
• On channel 00, press the “read” button.
• Save the result and return to factory settings.
• Enter the basic settings (04) and go to the measurement mode.
• Enter channel value 098, start adaptation.
• We are waiting for a message about the completion of the adaptation process.
• We return to the original section. Close the program and disconnect the cable.

. Our website will tell you how to do everything right.

You can find out how to install car audio yourself. We recommend it to everyone!

From this, you will find out how much anti-corrosion treatment of the underbody of a car costs.

When should you not perform remote sensing adaptation?

It is worth noting that it is appropriate to carry out the above procedures using software and special diagnostic equipment in the event of a failure of the damper settings. It does not matter whether the electronic parameters are broken or the mechanical settings of the equipment are lost.

If the operation of the throttle is impaired due to wear, then it is more advisable to think about repairing or replacing the part. If suddenly, after the steps described above, adaptation does not occur, it is worth checking the motor responsible for opening/closing the damper. There may not be enough power for the node to operate properly.

Using the example of adapting the throttle valve of the above-mentioned cars, we can conclude that absolutely all cars are characterized by some common processes.

For example, cleaning the damper body inside and outside before starting adaptation is necessary for any make of car.

The only difference is that in some cars the damper is adjusted using a cable, and in others using electronics. This difference will manifest itself in the choice of adaptation parameters.

Modern technologies have 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, the principle of its operation, how it is adjusted and repaired.

Design 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 a mechanical drive.

The accelerator pedal, or as it is commonly called, “gas”, is a means of controlling the position of the throttle valve.

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 drive. The drive can be cable or lever. All this, one way or another, makes it easier to press the gas pedal.

The operating principle of the electronic pedal is a little complicated, but it makes it much easier to control engine speed. This pedal is used only on fuel-injected cars, as it is entirely based on the operation of electronic devices. The accelerator includes: a pedal module, a signal conversion module and a 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 transmits an amplified signal to the throttle control unit. After matching the received signal with the electronic control unit, the throttle valve module determines its opening angle. This provides an electronic way to open the throttle valve.

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 operating mode. 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 adjustments. This event is necessary to maintain normal operation of the accelerator if the settings have been reset.

Sometimes it happens that when you press the gas pedal, the car stops responding to changes in the 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, the response to the pedal position also changes, therefore, the car may behave inappropriately at . Sometimes this problem can be recognized by the corresponding indicator on the dashboard or using electronic diagnostics carried out through the vehicle's on-board computer.

Adjustment procedure:

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

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

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

Video - Converting an electronic gas pedal into a mechanical one

Repair of an electronically driven accelerator is carried out based on detected faults. Like all parts, such a system also has a certain wear and tear, the occurrence of which cannot be prevented. In this regard, it is important to know how to troubleshoot if the electronic gas pedal breaks down.

Typically, pedal repair begins when the following faults are detected: there is a short-term failure of the response 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 actuators, or a lack of signal from the pedal module.

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

Another malfunction is associated with a breakdown. This error is displayed as a special code “022”, or, as it is also called, “throttle valve 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 looked for elsewhere, although such cases are rare. If the motor does not rotate, then it must be replaced.

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

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

How does an electronic gas pedal work, how are its advantages and disadvantages manifested, 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, they correct it, and in such a way that it is not always possible to achieve the desired result. This is clearly visible in the operation of the electronic pedal, which is so popular in the modern automotive industry. Although for those who feel insecure behind the wheel, and especially 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 pressure angles immediately enters the control unit through special sensors. Next comes the move The ECU, which calculates the required opening angle, and the drive, based on the data received, opens it to this angle. Moreover, if it suddenly becomes necessary to change the value of this angle (for a more economical mode or safety), the control unit does it itself, without receiving the corresponding command. It turns out that the driver cannot 100% regulate this process.

When is it necessary to replace the electronic gas pedal?

Due to the fact that this is an electronic drive, the main faults in it are related to the electronics. There are two sensors built into the pedal bracket that transmit commands to the control unit. If one of these sensors fails, a light on the panel will light up, which is responsible for the serviceability of the engine control system. In this case, the ECU goes into standby mode (the speed increases much more slowly). If two sensors fail, the emergency mode will turn on and the engine will operate as if it were. 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 will be disrupted. If the electric motor is worn out, then the monitor also displays an error indicating an accident. These damages can be eliminated, but if the accelerator of the electronic gas pedal, which is responsible for the dynamics of the car, fails, then this part should be immediately replaced with a new one. We'll look at how to do this below.

Electronic gas pedal repair – we fix the breakdowns ourselves

Basically, if any problems occur, the entire assembly must be replaced. But before taking such decisive action, it would not hurt to find out the cause of the breakdown. To do this, of course, it is worth reading the information on how to check the electronic gas pedal. To do this, you need to disconnect the block and sensors, and then unscrew the fastening nuts and remove the pedal.

To directly check, 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 gear mounting axis, remove the harness. To do this, you need to unsolder the wires, release the bracket and pull out the cable. Then we replace the wires, and, having disassembled the connector under the pedal, 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, through a microprocessor, converts the signals supplied from them, and then supplies 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 hand, it somewhat limits our desires. True, if you do not belong to the category of those people who need to “drive with the breeze”, but prefer to drive carefully with minimal fuel consumption, then this option will be just for you.

The importance of the throttle valve adaptation procedure can hardly be underestimated, and not every car enthusiast knows how to perform this operation on their own.

1

When the throttle assembly of any modern vehicle operates, 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's air duct smaller than the established norm. This gap is important for the normal functioning of the “heart” of the car, since thanks to it the idle speed is maintained at the required level.

When it decreases, the vehicle's electronic control unit (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 certainly increase due to the fact that the cross-section of the throttle, freed from the contaminant layer, will become larger.

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

2

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

• after the vehicle battery is completely discharged;
• after replacing or removing the accelerator pedal;
• after replacing or reconnecting the vehicle's electronic control unit.

Undoubted signs indicating that the damper needs to be trained immediately are the following phenomena:

• whistling when revving;
• inadequate behavior of the engine at idle;
• lack of power at idle or failures.

3 Conditions for carrying out the idle speed adaptation process

Before starting training, a number of prerequisites must be met:

• travel by car for 10 minutes;
• ensure that the battery voltage at idle is at least 12.9 V;
• warm up the gearbox;
• The wheels of the vehicle must be straight, the steering wheel must be in the middle position;
• engine temperature – 70–95 °C;
• all devices that put a load on the car’s electrical network (heated windows, headlights, etc.) should be turned off;
• The automatic transmission selector is set to N or P.

4

It is advisable to adapt these devices before you teach idle speed. If the cable of the sensor that sends the signal about the accelerator pedal position is disconnected, you must perform the following steps:

1. Release the pedal completely.
2. Turn the ignition key to “ON” and wait at least two seconds;
3. Turn off the ignition, wait 10 seconds;
4. Repeat the procedure according to point 2, and then according to point 3.

The described procedure (you must admit, it’s not at all complicated) will teach the damper to open correctly. But to adapt the valve to the “Closed” position, the following operations should be performed:

1. Release (fully) the accelerator pedal.
2. Place the key in the "ON" position.
3. Switch the ignition to “OFF” and wait 10 seconds.
4. We make sure that the valve lever moves within 10 seconds (a characteristic sound indicates that there is movement).

5

Now you can proceed directly to learning how to idle, “armed” with a stopwatch and a little bit of patience. The procedure is performed like this:

• The engine starts and warms up to standard operating temperature.
• The ignition is turned off and no action is performed for 10 seconds.
• The ignition turns on (the accelerator pedal is in the released position), 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.
• The pedal is released completely (and without delay) at the moment when the malfunction indicator on the panel stops flashing (it should be lit steadily).
• Then immediately, without touching the accelerator pedal, you need to start the engine so that it can idle.
• We wait about 20 seconds.

After all the announced actions, we accelerate the engine (2-3 times) and make sure that the ignition timing and idle speed standards comply with the standards. At this point, the damper adaptation procedure can be considered complete.