Often our car service is visited by GAZelle cars, because this commercial transport, which day and night as workhorse plows. Every day, a lot of GAZelleks enter the roads of our country and sooner or later certain breakdowns occur, which we try to eliminate! Today is no exception. A GAZelle Business with an UMZ engine came to our repair shop! Well, let's help the 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 machine sometimes starts to work as it should, but then the problem repeats. RPMs don't rise above 2000.
Here it is, the workhorse!
Fig.1
Where to start the repair? Of course with computer diagnostics. We connect diagnostic equipment and read the errors that are registered in the engine control unit.
Fig.2
We are interested in current error P2138 Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Correlation. What does she mean? This error literally stands for: P2138 incorrect voltage ratio "D" / "E" throttle position sensor or accelerator pedal. The 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, you need to understand how they work, so let's look at them first. design features, device and figure out what is the difference between a mechanical throttle and an electronic one.
The principle of operation of the system with electronic throttle valve and an electronic gas pedal.
And so at the beginning we will consider the mechanical throttle device and figure out how the adjustment takes place idle move.
Fig.3 Mechanical throttle valve (rpm 840..900) 
In a mechanical throttle valve (Fig. 3), the idle speed control (4) is responsible for idling (engine speed). The throttle valve itself (penny 1) does not participate in any way in adjusting the idle speed. The idle speed controller sets 55 ... 65 steps (mikas 7.1) to maintain speed in the region of 800 ... 900 rpm. The more steps of the idle speed controller, the higher the engine speed will be, because. through the bypass channel (3) will pass large quantity air.
Fig.4 Mechanical throttle valve (rpm 1300..1400) 
To maintain the idle speed at 1300...1400, the idle speed controller (2) sets approximately 115...120 steps (mikas 7.1). The regulator rod (4) in this position increases the air flow passing through the bypass channel (3), thereby increasing the speed.
But how does the idle speed adjustment with electronic throttle work, and what parts does it consist of?
The electronic throttle valve GAZ consists of the following parts (Fig. 5): the damper itself (penny 1), the motor reducer (2) that controls the damper (penny 1), and two resistive position sensors (3)
Fig.5 Electronic throttle (rpm 850..900) 
Let's clarify that in cars with electronic throttle there is no idle speed controller as individual item. 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 damper itself (1). The damper is controlled by a motor reducer (2). Sensors (3) read the current damper position.
Fig.6 Electronic throttle (rpm 1400..1500) 
In order for the engine speed to increase to 1400....1500, the motor (2) slightly opens the throttle 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 floating, it must 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.
Consider Option 1. The gas pedal is not pressed.
Ignition on, gas pedal not pressed, throttle turned 7.8%, why not 0% you ask? We explain: because we have an electronic throttle, then the idle speed controller, as you already understood, is absent, but we need air to ignite the mixture. It is precisely through a gap of 7.8% that this air enters during engine start.
Fig.7 The ignition is on, the pedal is not pressed, the damper is closed (ajar) by 7.8%. 
What parameters can we observe with a working throttle and a working gas pedal?
Fig.8 Typical parameters values of a serviceable gas pedal and throttle valve (pedal not pressed) 
Table 1. Indications of a serviceable gas pedal and throttle valve (pedal not pressed)
 |
|
 |
0.78
, R2 ADC_ETS2(V) 4.22.
|
Consider Option 2. The gas pedal is pressed all the way down.
The ignition is on, the gas pedal is pressed all the way down, the throttle is turned 24%. Why not 100% you ask? Well, that's how it's programmed by the manufacturer.
Fig.9 The ignition is on, the gas pedal is pressed all the way down, the damper is open by 24%. 
On the computer screen with the gas pedal pressed, we observe the following parameters.
Fig.10 Typical parameters for the values of a serviceable gas pedal and throttle
dampers (pedal fully depressed). 
Table 2. Indications of a serviceable gas pedal and throttle valve (the pedal is pressed all the way).
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The gas pedal readings (highlighted in yellow) are the parameters: |
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Throttle readings (highlighted in red) are parameters: ADC_ETS1(V) 1.42
, ADC_ETS2(B) 3.58
|
And so, we considered the options for the operation of the throttle and gas pedal, provided that they are fully operational, but back to our GAZELLE and the error P2138, which is written to the ECU memory when one of the values does not match, we recall these values.
Correct gas pedal: the voltage R3 of the gas pedal divided by 2 is equal to R4, i.e. R3/2 =
R4.
Correct throttle body: the sum of the voltages R1 and R2 of the throttle valve is 5V, i.e. R1+R2= 5v.
If one of these conditions is not met, then the error P2138 appears - incorrect voltage ratio "D" / "E" 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 above checks. Without wasting time, we begin to check our readings on a faulty car.
Checking throttle and gas pedal readings broken car Gazelle.
To begin with, we look at the throttle and gas pedal voltage readings on a muffled car with 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)
|
|
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Throttle readings (highlighted in red) are the parameters: R1 ADC_ETS1 (V) 0.78
, R2 ADC_ETS2(V) 4.22.
|
Fig.12 Ignition on, pedal not depressed (pedal fully depressed). 
Table 4. Indications of a defective gas pedal (the pedal is pressed all the way down).
|
Indications of a defective gas pedal (highlighted in yellow) are the parameters: |
|
Throttle readings (highlighted in red) are the parameters: R1 ADC_ETS1 (V) 0.80
, R2 ADC_ETS2(V) 4.21.
|
Pay attention to the percentage of throttle opening on pic 12. provided that the gas pedal is pressed all the way down. Due to a faulty accelerator pedal, the ECU cannot detect that the accelerator pedal is depressed and therefore the damper opening percentage will remain around 7.1%. If the gas pedal were in good order, then the readings should correspond pic 10.
Well, we have defected the electronic gas pedal. Let's start dismantling it, disassemble it and find out what happened to it.
To disassemble the electronic gas pedal, you need to unscrew the four screws.
Rice. 15. Loosen 4 screws. 
Fig.16. We are filming top cover with board and resistors. 
Here is the wiring diagram for our pedal.
Rice. 17. Accelerator pedal connection diagram with ECU. 
How is the connector on our gas pedal numbered?
1. red supply +5 volt sensor 2 pedals
2. brown-orange power +5 volt sensor 1 pedal
3. brown pink pedal sensor 1 signal
4. brown common sensor 1 pedal
5. red-pink common sensor 2 pedals
6. brown green sensor signal 2 pedals
Rice. 18. Pinout of the gas pedal contacts. 
Fig.19. Accelerator pedal sensor board 
On Figure 19 you can see a shiny (scraped) area (highlighted in green) on the resistive layer, from the fact that the gas pedal slider is constantly moving forward and backward. Over time, this layer is strongly rubbed and the resistance of the coating becomes different, and then miracles begin.
In general, the situation is like this. There is a defender forsage drift gt steering wheel, there were no problems with the steering wheel and pedals, I didn’t live in pain. Recently rarely used it and recently decided to get it. The essence of the problem is that the right pedal (gas) does not work adequately on the "pedal block" itself - when the gas pedal is fully "pressed", the "recoil" of the signal is not complete. And to be more precise:
1) This is a screen of the steering wheel properties from the control panel. During the screen, I pressed the brake pedal, the arrow went to the right and did not move anymore
2) And these 3 screens already when I pressed the gas pedal, the arrow did not reach the end and was constantly twitching. 
Each time the result of where she stopped was different. In the same games, this is very, very strongly felt,
When I discovered this, I decided that something was wrong with the electronics. The pedals were disassembled (not by me), and no damage or defects were found (understood by an electrician). I started looking for an alternative solution, because I don’t want to buy a new one, but good steering wheel with gears - it’s worth it, sorry, damn it. (Well, they couldn’t have started to fail like that because they didn’t work) As a result, I was looking for an opportunity to change the pedal sensitivity, because I don’t see another solution how to improve the situation. ( And setting the sensitivity of the steering wheel and pedals in games is oh so rare) There was such a picture - with different versions firewood, without them, I don’t have one tab (Controllers Function) in these very properties, where you can adjust the sensitivity of the pedals, and their dead zones. I plowed the Internet, but found only disappointment: Logitech has a proprietary program for their steering wheels, and in all manuals people have this tab (note image) 
I don't even know if this will help me in any way. It is because of this desperation that I came here. Can you please tell me how you can adjust the sensitivity of this pedal or in some way this problem? I'm not very strong in the steering wheels, and the problem may be deeper, but still. How I would like to have a program similar to the one for Logitech steering wheels. It allows you to customize every little thing. Maybe there are some other programs that allow you to adjust the sensitivity of the pedal? I will be glad for any help.
Due to the introduction of European emission standards exhaust gases, at the beginning of 2011, the AvtoVAZ concern began to equip Lada cars with the E-gas system. In the future, the manufacturer supplied Grant with an electronic gas pedal.
The general meaning of the work electronic system in that by moving the gas selector pedal, special sensors are activated, which are located in the gas pedal module (hereinafter - MPG). With each change in the force exerted on the MPG, the resistance of the sensors also changes. After that, an electrical signal is generated that enters the ECU, is read, processed, and, depending on the degree of depression, the results of processing, the final operation of the throttle is regulated.
Advantages and disadvantages of e-gas for Grants
The system is designed so that the need for mechanical parts connecting the accelerator itself and the throttle assembly is missing. This approach provides a number of advantages, such as:
- reduced fuel consumption and reduced exhaust emissions;
- instant reaction from the control unit to manipulations with the accelerator;
- soft pedal travel;
- smooth distribution of engine speed.
There are some disadvantages that motorists face. These include:
- a smooth increase in engine speed when you sharply press the gas pedal;
- low maintainability of the unit in the event of its failure constituent parts(replacement of the assembly assembly);
- some inconvenience with engine modifications.
How to check E-gas
If you have doubts about the performance of the product itself, you should dismantle and check the assembly with a multimeter.
The main symptoms of a malfunction:
- lit up "Chek" on dashboard(error 0504 during diagnostics);
- when you press the gas pedal lost responsiveness;
- are diagnosed increased speed engine when changing speed on the gearbox.
If we talk about the causes of malfunctions, then the most common of them are:
- failure of one or both PGM sensors;
- malfunction of the sensors as a result of oxidation of the contact tracks, their contamination.
As stated earlier, in order to check E-gas grants, you must use a multimeter. For diagnostic measurements electrical circuits, the module must be dismantled, having previously disconnected it from the contact chip.
After that, you need to switch the working position measuring device to ohmmeter mode. The meaning of the test is that it is necessary to alternately measure the state of the contacts and conductive tracks of the MPG sensors. For example: connect one probe of the device to pin No. 2 and the other to pin No. 4. While holding both probes connected, slowly step on the gas pedal and observe the meter reading. A normal reaction is considered to be a smooth decrease in electrical resistance when you press the accelerator. An abrupt, not stable decrease indicates possible malfunction sensor. A similar sequence of actions is taken for the remaining contacts.
Replacing the gas pedal on the Grant
The replacement procedure is quite simple and does not require special technical means.
In order to dismantle the node, you will need:
- Key for 10.
Consecutive steps to replace the fret grant gas pedal:
1. The first step is to remove the negative terminal from the battery.
2. Next, you need to move to the driver's part of the car.
3. Above the gas pedal, locate and disconnect the contact chip that is connected to the sensor connector. 
4. After that, take a 10 key and unscrew the three fixing nuts. In conditions of insufficiency inner space, it is most convenient to use a socket wrench. 
5. Remove the pedal from the dedicated mounting pins.
Reverse installation is carried out in a mirror sequence.
Adjusting the sensitivity of the gas pedal
"Note! Not only the pedal together with its module takes part in the control of the throttle valve, important role plays the control unit throttle assembly. Therefore, this product should also be given Special attention in cases where the MPG is in a known good condition, and problems with engine speed remain.
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 general principle accelerator operation. 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 during intake manifold engine. The more oxygen enters the combustion chamber, the higher the rpm. crankshaft. 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.
Operating principle electronic pedal a little complicated, but many times easier to control the engine speed. This pedal is only for injection cars, as it is entirely based on the work 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 electronic unit control, the throttle module determines the opening angle. 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 action is necessary to maintain normal operation accelerator in case the settings were knocked down.
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 specific free play, during which the voltage applied 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 conducted through on-board computer car.
Adjustment order:
- 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 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.
- Set the pedal to seat and try it out. If the behavior of the vehicle has changed in better side, it means that the adjustment of the electronic gas pedal is 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 environment. That is, at seasonal service car, it is strongly recommended that you also adjust the gas pedal, since this value can change, inversely with the changing resistance.
Video - Converting an electronic gas pedal into a mechanical one
Accelerator repair with electronic drive based on the 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, pedal repair is started when it is detected the following faults: There is a momentary failure to respond to a change in pedal position or complete failure pedals, 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, you need to look electrical wiring for spillage, insulation damage ( 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. In case of detection of faulty conductors electric current they must be replaced immediately.
Another malfunction is related to breakdown. This error is displayed as 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.
It is installed on all Lada models (XRAY, Vesta, Largus, Grant, Kalina, Priora and Niva 4x4). Owner reviews about it are not comforting, many complain that the e-gas pedal is “stupid” (less sensitive and informative than the usual cable). Did you know that in some cases the electronic gas pedal can be adjusted to be more responsive and a little more alive?
We determine the model of the accelerator pedal, this can be done by the catalog number, which is glued to the side of the body. If you cannot access the sticker, you will have to remove the electronic gas pedal:
- Disconnect the block with wires next to the gas pedal;
- Remove three nuts using a 10 wrench;
- Remove the housing and pedal assembly.
The manufacturer installs on Lada cars (depending on the year of manufacture) at least two types of electronic gas pedals:
- Old style ( Catalogue number: 11183-1108500);
- New sample (article: 11183-1108500-01).
Each block is modified differently. Attention! All further actions you do at your own risk. In addition, you may void your warranty.
OLD E-GAS REGULATION
The block cover (11183-1108500) is fixed with bolts that are inserted into the oval holes. The workaround is. to loosen the 4 screws and rotate the cover in the desired direction:
- Economy mode (counterclockwise). For quiet ride, to accelerate, press the pedal a little more than before. Gasoline consumption is reduced;
- Active mode (clockwise). The car reacts even with a slight pressure on the gas pedal. Gasoline consumption is increasing. The pedal becomes more sensitive and informative.
In other words, we get the same effect as after installing JETTER (Jetter or spur).
It is noticed that the first minutes after such settings, the idle speed may be increased (about 1300 rpm). But after a minute, the ECU gradually adjusted and the speed dropped to the usual. If this does not happen, turn on the ignition for a minute, and then start the engine.
If necessary, you can easily return to the original position (mark it in advance).
Articles about Lada X Ray
REFINEMENT OF THE ELECTRONIC GAS PEDAL OF A NEW SAMPLE
The pedal assembly (11183-1108500-01) does not have oval holes, which does not allow adjustment in the manner described above. Instead, it is proposed to cut off the protrusion (by 2-3 mm), which prevents the full travel of the pedal. Such modernization allowed to increase the pedal travel, which made acceleration with the “pedal to the floor” more active. Also noted is the lack of thoughtfulness when the pedal is pressed sharply. 
