Throttle position sensor errors. Throttle sensor. Sensor Diagnostics and Repair Checking the throttle sensor operation

It happens that the car begins to be unstable to work or sick at idle. The reasons for such a behavior of the engine are a lot, but one of them is faults of the position sensor throttle valve (DPDZ). In principle, this phenomenon is quite often found, and you may seem first that there is some very serious problem with the engine. In order to make sure that there is no serious breakdown, but it's all about the throttle sensor, it is necessary to check its serviceability before you contact it.

DPDZ and problems with him

The sensor is a device that determines the angle to which the throttle is rotated. This is a sensor, without which your engine could not work correctly. If it is easier to speak, then we can say that it shows, the damper is open, or not.

In addition, it should be borne in mind that the sensor depends largely, at what point the ignition will occur, and in case you have automatic box Gear, - how much it will work correctly. That is why you need to follow this sensor.

The problem with the sensor lies in the fact that when the sensor malfunction is present, it can be closed, and the "brains" consider it open, respectively, begin to supply a larger amount of fuel, which will correspond to a suitable air fuel mixes. As a result, the engine begins to overflow, and it stalls.

Of course, little pleasant is when the motor constantly stalls. In addition, there is another problem. When the engine is operating in this mode, it can cause it fail. If this happens, the breakdown can be very expensive. But even if the throttle malfunction does not entail more serious problems, it will still be to beat your pocket, since the engine will begin to consume much more fuel than it is necessary.

If you want to check if the sensor is fine, then you should know where it is located. In order to find it, first track the throttle nozzle. Just on it and there is a sensor connected to the valve axis.

Signs of sensor malfunction

So that you can identify the sensor malfunction, you need to know all the symptoms that may indicate the availability of this problem:

• The engine begins to stall at the moment when you switch the transmission. Or rather, at the moment when you turn off the transmission while driving.
• The instability of the revolutions at idle, and no matter what mode does the engine running.
• The presence of jerks, when you gain speed, even if you try to do it smoothly.
• The engine begins to stall if you suddenly remove the leg from the gas.
• Significantly reduced engine power.

There are cases when dashboard can light up badly icon check Engine", About this feature you will learn a little further in the article. Anyway, if you notice one or more of these features, it is better not to delay and check the condition in which the sensor is located.

How to check

In check there is nothing complicated, but it is worth noting that it is necessary to clearly stick to some sequence, besides, you will need an additional device - tester.

A small help regarding Light Bulb "Check Engine": It reminds you that there is some kind of malfunction in the engine and you need to check or repair the engine. In theory, it should light up when the ignition is turned on and then immediately ground. In the event that it does not go out, it means that the computer has discovered some problems. IN this caseMost likely, you need to refer to the specialists.

• First, turn off the ignition. Make sure that on the dashboard the "Check Engine" light is not lit.
• In the event that the light bulb went out, you can safely open the hood and start checking the sensor.
• First check if there is a minus.
• Next, check whether the power supply is on the sensor (note that the values \u200b\u200bcan be different depending on which voltage is used in the car).
• Without removing the sensor from the scene, connect minus on the "mass", and plus to the output contact that goes to the computer.
• Not touching the damper in no way, turn on the ignition. The device will have to show voltage up to 0.7 volts.
• After that, turn the handle, completely opening the throttle. In this position, the device should show no less than 4 volts.
• Turn off the ignition.
• With the ignition off, you need to connect to the sensor again.
• Then smoothly and without jerks to turn the sector, at the same time, look at what readings give the device.
• If they slowly grow without any sharp jerks and oscillations, everything is in order.
• But if not, this indicates that the rubbing places were formed on the track of the resistor.

Please note that these indicators are very important, because they affect whether the control unit will work correctly, which is responsible for the level of fuel supply to the injectors. After all, there may be situations where the throttle is closed, and the computer perceives it completely open, or vice versa. It also negatively affects the engine.

In case you observe serious jerks, you will need to change the sensor.

If you changed the throttle position sensor, then after that the sensor adjustment is not needed. For the controller, the initial position is the moment when the flap is completely closed.

Causes of sensor breakdown

Unfortunately, you cannot deliver yourself from all breakdowns of any mechanisms and parts or sensors in the car. As for the sensor, there are several reasons why it can fail:

1. The slider with the resistive layer loses contact. This may be caused by a broken tip, which is lying on the substrate, as a result, everyone else is broken. It is worth noting that in this case the sensor can continue to work while it still has a resistive layer. As a result, the core finally fails. In case you have this fault of the sensor, it will be more difficult to reveal it because unstable work Engine You can either other reasons.
2. The linear voltage of the output signal does not increase. This may occur due to the fact that the base of the foundation is erased to the base in the place where the start of the slider is.

Note that if you have a malfunction of DPDZ, then no additional signals should appear on the dashboard, because the self-diagnosis of the car does not reveal this problem, it is possible to determine it only by the features that have been listed above.

And finally, select a high-quality sensor, if you still have to change it. Better do not put an inexpensive film-resistive sensor, because it can lead to the fact that it will soon stop working correctly, and you again begin to notice the symptoms of the sensor malfunction when driving on a car. But even worse, the next breakdown of DPDZ can, in turn, harm the engine.

The best option There will be a contactless sensor. Naturally, its price is much higher, but you can be sure that it will serve you long and stable.

Summing up, it can be concluded that if you notice any symptoms that indicate the presence of a problem with the throttle position sensor, then checking its state will not be too complex operation. If nevertheless, when checking, you revealed that the sensor is defective, then replace it. At the same time, it is better not to save, because it is impossible to save as components to save. Love your car, and then he will repay you long Service and reliability.

Video

Injector fuel injection system is the most common and reliable. Engine work internal combustion Stable due to the use of a multitude of sensors: idle move, revolutions, the position of the damper of the choke or distribution Vala.. Unlike carburetor systemsHere there is no traver (ignition distributor), and the microcontroller block performs all the work on the distribution of Spark Candles.

This block needs to "know" a lot of parameters to issue a spark in time and put an accurate dose of the fuel mixture into the cylinders. For this purpose, you need a throttle position sensor (DPDZ). With his help the electronic unit The management "understands" which magnitude the flap is open. How to check the throttle position sensor independently if it fails? Let's discuss.

Basic information about DPDZ

Among the entire variety of devices, two types of DPDZ can be distinguished:

• resistive
• non-contact.

On the domestic cars The sensors of the resistive type are widely used, which are durable and simple in the device. They produce their resource with interest, and very low price Explains the preferences of the car owners in their direction. The design of the device is exactly the same as the conventional variable resistor. The DPDZ axis is connected to the damper and moves with it. This changes resistance between the input and output. Due to this, the supply voltage (5 V), passing through the resistor, changes - this is controlled by the machine of the car.

Resistive devices have one big minus: the resistive layer is directly engaged in time. This occurs in the extreme position corresponding to the idle go. As a result, the engine work becomes unstable, the turnover is "jumping", sometimes the engine stops at all. Contactless DPDZs are deprived of this shortage, as they work on the Hall effect.

DPDZ diagnostics

Knowing the principle of operation of the DPDC and its device, you can understand how to check the throttle position sensor. To diagnose yourself, you will need:

• screwdriver
• multimeter
• control lamp.

Algorithm of work during diagnostics:

1. Turn on the ignition and connect the multimeter to the signal output.
2. In the first extreme position, which corresponds to the XX, the voltage should not exceed 0.7 V.
3. Turn into the second extreme position (maximum opening), while the voltage should not be above 4 V.

For diagnostics it is convenient to use the arrow voltmeter. Slowly rotate the damper and follow the voltage change. If there are jumps, and the voltage changes unevenly, then we can talk about breakdown DPDZ. It is impossible to repair it, only replacement is necessary.

You can remove the sensor from the car and check it with an ohmmeter. To do this, between the output "+" and the signal, connect the terminals of the measuring instrument (it is convenient to diagnose the arrow omemeter). Washing the sensor rotor, you can make sure the integrity of the resistive layer.

Almost anyone vehicle There is a large number of all sorts of mechanisms and nodes. Therefore, when a malfunction concerns even a small unit, all this promises serious problems for the entire car. The position sensor of the throttle is one of those small and at the same time very significant nodes in the car. Consider its appointment, principle of operation and the main causes of faults, as well as how to deal with them.

IN automotive engines Internal combustion working on gasoline, an integral part of the intake system is the throttle. The main task of this mechanism is to regulate the number of incoming air in the chamber. Thus, it provides proportional mixing air with fuel to achieve the maximum result during combustion. As in many others, in cars marks Kia. The spectrum is mounted on the site between air filter And the intake manifold. It can be said that its action is akin to the air valve: in the open state, a pressure is reached equal to atmospheric, and in a closed decreased to vacuum.

The sensor components include variable, permanent and one-time resistors, the total resistance of which is approximately 8 com. The throttle position sensor has two extreme outputs, one of which receives the voltage supplied by the controller.

The second conclusion at the same time is powered by mass. The signal comes to the controller through the resistor, which transmits the actual position of the damper current. Depending on the position, the signal is transmitted, the pulse of which varies in the range of 0.7 - 4 V.

Types of DPDZ

As a rule, two types of DZ are distinguished: electrical and mechanical. The latter is usually used in inexpensive cars. It consists of the following components: no power controller, housing, sensor, throttle. As for the case, it is part of the cooling system. To ensure the ventilation of the crankcase and filtering gasoline vapors, a system is provided with nozzles with a sensor. When the throttle is in a closed position, when starting or warming the engine, the idling regulator provides the required frequency of revolutions. crankshaft. RHX provides air supply to the inlet system by the blocked damper.

Electric type throttle sensor is more popular and used in cars last generation. This species is most productive and has electronic system Management than the most ideal torque value is achieved, power increases, and fuel consumption is reduced. Unlike mechanical, there is no direct interaction between the gas pedal and the flap, and the idle regulation is carried out by changing its position. In addition, the electronics can sized the optimal torque value. This process is carried out thanks to the operation of the control unit and input sensors. It is thanks to the sensors and the control unit, many processes are in the ultimately associated with the control of air supply.

This module consists of a throttle valve, spring mechanism, electric motor, gearbox, DPDZ and housing. There is a practice of installing at the same time two throttle position sensors. This is due exclusively by precautions, since it allows one, to switch one, switch to another. In this case, the contactless sensor of the throttle position and with a sliding contact is distinguished. The spring mechanism provides a return position of the flap during emergency mode.

Symptoms of faults

Like any mechanism, DPDZ is subject to faults. Checking its status will allow you to determine the breakdown. In case of serious damage, it will be replaced.

To begin with, it is worth paying attention to the number of revolutions performed by the engine at idle. If their value jumps, then you should check the operation of the sensor. It may be necessary to replace it. Another malfunction is - with a sharp discharge of gas stalls the engine. Or, when accepted, the speed jumps, there is no response to pressing the gas pedal, the engine turnover is within a half - three thousand. All this indicates the need to check the efficiency of DPDZ, and if necessary, a replacement should be replaced either a whole node or its components.

Diagnostics

Diagnostics for any car, as well as for KIA, among other things, is carried out equally. All that will be required of tools is a multimeter. Next, you need to start the car and see whether Check Endin does not shine. If everything is in order, the moaching motor, we find under the hood mass and turn the engine again. We start searching minus. We search for the coaling wire. It should be checked whether the current comes to the sensor. Then you need to make sure that the opening opening is functioning properly. To do this, connect one of the wires of our measuring instrument to the sensor connector, and the second change the position of the flap. If everything is fine, the value of the device change. If the value has not changed, it speaks of a malfunction of a variable resistor and maybe it will be necessary to replace it.

Well no

The throttle sensor is an important detail in any car - this mechanism is the link between the controller and the throttle valve. He starts his work immediately after the gas pedal is pressed. The violation of the throttle sensor is caused by the engine malfunction, since the controller that binds to it adjusts the fuel supply from the tank. Each driver knows that such problems can provoke an increase or decrease in the amount of fuel supplied. In the worst case, the car may fail, but if you identify problems and eliminate them in time, you can avoid engine problems.

Where to look for a damper sensor?

To troubleshoot problems, you need to know exactly where the desired throttle sensor is located. Sensor is B. motor compartment Machines, opening the hood, you can easily find this place. The axis of the throttle connects the nozzle with the direct mechanism. The reasons for anxiety may be such:

• increase idling in the heart of the engine;
• engine plug on neutral transmission work;
• swimming of idle speed;
• failures in dynamics;
• the CHECK ENGINE button is triggered.

Such signs may arise if one of the moving cores has failed, which provoked a violation in the engine. When examined, also pay attention to the state of spraying in the slider. If the spraying disappeared or became white, then this may indicate a violation of the engine operation. There are other causes of problems with fuel control, you can diagnose them only with the help of special equipment, which, which you yourself can cope with this work.

Many motorists are wondering how to check the throttle position sensor? To do this, you need to allocate some time and make such operations:

• turning on the ignition, you must connect the voltmeter to the mechanism to check the voltage between the slider and the minus indicator. The norm is an indication corresponding to 0.7 V;
• next, you must fully open the damper. To do this, you need to turn the plastic sector, in this area the indicator should be 4 V;
• check the resistance between the contact slider and any output, before this it is necessary to turn on the ignition and pull out the connector;
• slowly and smoothly turn the sector, watching the voltmeter indicator, the arrow should move evenly and smoothly, the failures during the arrow indicate the throttle damage.

In order to avoid breakdowns, you need to choose suitable sensors Throttle. Film-resistive throttle valves are most often used. It is such sensors that are installed on the factories, but they are not always suitable. A universal option is a contactless throttle sensor, this mechanism copes perfectly with its work and almost never fails. The advantage of this device is that it works on magnetoresistive technology, it helps to reduce the probability of breakdowns. Magnetic fields affect the valve axis, changing the resistance, due to this changes occur in the sensor indicators. This type of throttle valve has a high price, but using them, you will understand that the price fully justifies quality. The service life of such a mechanism is much longer than other species. Using the contactless throttle recorder, you can get rid of many problems. Modern technologies Allow to simplify car care, which is why auto mechanics advise the use of magnetoretive systems to regulate the fuel supply to the engine.

Principle of operation and structure

The sensor in its structure has three outputs:

• the first to supply voltage to other levels;
• the second performs the function of the compound with the bulk;
• the third reads the signal from the motor control unit.

Closed throttle testimony indicates minimum voltage on sensor indicators. The mechanism works as a potentiometer.

An important indicator The throttle valve protrudes the size of the duct, it is this value that solves a major role in choosing a sensor. The large diameter of the throttle channel will help reduce resistance in the mechanism, the air will go to the engine to a lesser extent, and therefore the operation of the motor will be significantly better. For prophylaxis, it is necessary to periodically clean the channels and the damper itself to avoid trouble.

In the picture, you can see a schematic connection of the throttle position sensor with the engine control center. As you can see, the mechanism has three outputs, each of which is intended for a specific purpose.

Any violations in these compounds may damage, which can be displayed on the engine. It is for this scheme that all the elements of the system must be connected.

Conducting adjustment procedures

Remember that the adjustment procedure is performed solely on the average level of the ignition connector:

Common sensor malfunctions

Very often over time, the throttle sensor fails due to the substrate malfunction, which is covered with a resistive layer. When this layer is erased or loses its properties, the sensor starts to flure. In this case, it is necessary to replace the substrate so that the sensor can read without any problems linear movements inside the mechanism.

Another important detail is the slider. The cause of problems can be a violation in contacts between the slider and the resistive layer. As a result of this, loops are formed on the surface of the layer, which interfere with the operation of the mechanism.

The best option is full replacement Old throttle sensor for new. It makes no sense to change individual details, since after a certain period of time, the problems may return and eliminate them will be more difficult. On such models of cars, like VAZ 2110, VAZ 2114, 2112, you can easily reinstall DPDZ.

Often there is a problem with the oxidation of contacts. In this case, can help special fluidwhich you need to process all available contacts.

It also happens that the damper is closed not to the end, as a result of which the fuel supply can be distributed unevenly and incorrectly. With this difficulty, you can easily cope if you cut the extreme parts of the mechanism so that the flap is tightly closed on both sides.

Many motorists, finding gaps in contacts or cracks in the area, resort to the use of conductive glue. Of course, for a while, the operation of the mechanism is restored, but the sensor itself will never be the same, therefore it is advisable to simply purchase a new device to avoid problems in the future.

Most auto mechanics use film-resistor throttle, as they have relatively low cost and sold in all stores. Sensor Replacement - simple procedureBut requires attention and prudence.

Procedure for replacing the mechanism

The throttle sensor replacement operation must be approached carefully and consciously. Prepare everything necessary materials and equipment. Consider the stages of the throttle sensor replacement:

Never forget that the car needs concern. Repeat the engine periodically, check the contact resistance and the level of vibration at the required areas. Always have all the necessary measuring equipment in your garage. Having studied some features of the structure of your car, you can always come to his aid in time if something goes wrong. It is better to carry out prevention in time than to spend many money to repair the car.

The throttle sensor is a very thin and vulnerable mechanism, so it needs great attention, but if you systematically check its condition and help contact, your car will serve you a long faithful service.

Lost valuable fuel does not want anyone, so you need to always control the work of the damper sensor. For a hundred checking can do to you in a penny, while you yourself can spend all the necessary procedures in your garage.

Buy throttle sensor for you will not be difficult. In any specialized store there big choice Similar mechanisms. According to specialists, problems with DPDZ are found quite often, it is the breakdown of this mechanism that the car's cap is caused among the road. So that this does not happen, treat carefully to your car and spend prophylactic work on time.

As you know, the car VAZ 2110 was produced with injection and carburetor engines. Injectors are equipped with an impressive number of sensors, the functionality of important aggregates depends on the performance of which the functionality of important units. Therefore, when they are damaged, there may be problems in the work to move, reduce power, grow fuel consumption and much more.

A vivid example of an important sensor is the throttle position sensor. Today we will talk about it in more detail.

Why he need it

The valve position sensor is responsible for determining the current throttle position. Depending on this, the fuel supply system changes the amount of fuel supplied at a particular mode of operation of the power unit.

If there are problems with it, you can turn to a hundred, so as not to spend strength and nerves. But in practice, it is easy to change the DPDZ itself, plus you will save a decent amount of money.

The desired regulator is located on the side of the throttle on the axis of the throttle valve.

Features of work

DPDZ is in essence is a variable resistor, one output of which is supplied to 5 volts. The second contact is associated with the mass, and the third connects to the controller.

When you click on the gas pedal, voltage changes. The sensor monitors the output voltage indicators on the controller, thereby adjusts and controls the quality of the fed fuel mixture. This directly depends on the corner of the opening of the damper itself.

If for some reason this regulator fails, the catastrophe will not occur, since it will take a different sensor with a mass consumption of air.

This does not mean that DPDZ can not be changed. Each regulator has its own functions, because it is not worth shifting the tasks of DPDZ to DMRV.

Fault

There are several characteristic features of faults, at the expense of which it can be found that problems arose with the throttle regulator.

• High idle figures;
• When the transmission is turned off, the engine can stumble;
• When the car is gaining momentum, the car pulls, jerks are felt;
• The acceleration dynamics deteriorate significantly;
• There are floating speed at idle.

It should be noted that such signs can be characteristic and when there is no failure of other nodes - no idle regulator or ignition module, for example. Therefore, it is previously necessary to check DPDZ.

Checking the state of the regulator

Next, let's talk about how you can check this throttle sensor. The event is necessary because it makes it possible to understand whether all the troubles are really because of it, or the problems arose due to the failure of other elements of your car.

Non-rare novice car owners make hasty conclusions, relying on primary signs of breakage. From here too much repair work, expenses.

To check the current point of the throttle position sensor, you need:

• Measure the indicators of the voltage at the output of the slider by turning on the ignition and opening the contacts of the idle course;
• If the test indicates that the voltage is more than 0.7 volts, then the sensor has really failed;
• Open the flap completely. In normal condition, voltage indicators should be no more than 4 volts;
• Measure the variable resistance resistor;
• To do this, an ohmeter is connected or a multimeter in the module mode for meals and the output;
• Slowly start turning the throttle;
• In parallel, follow the testimony on the device;
• If, as the damper is discovered, the resistance is also slowly changing, then the unit works properly.

If you have found during the check that the sensor is faulty, it only needs to be replaced. It is not subject to repair.

The resistive layer for which the slider moves, under the action of friction force is erased over time. Because of this, the regulator begins to produce incorrect data, the characteristics of the supplied mixture are changed, the engine operation is worse.

Replacement

In fact, change this sensor to madness simply. So do not rush to send a car to the station maintenance. Everything can be done with your own hands, the quality of this will not suffer.

1. To dismantle the throttle position sensor, you first need to find it.
2. As we have already noted, there is a desired unit from the side of the throttle on the axis of the throttle.
3. Having found an element, take a curly screwdriver.
4. With this simple tool, unscrew the pair of bolts that hold the device.
5. Note special attention On the gasket, which is available under the old regulator. It is not recommended to use it, it is better to immediately buy a new one. Often, the gasket is already complete with the throttle sensor itself.
6. After removing the old sensor, you can slightly clean the place of installation if there are contamination there.
7. Next is the new sensor together with the new foam pad and the bolts are tightened.
8. Try to tighten the fasteners as far as the stop, otherwise, otherwise, the new throttle sensor will quickly lose its efficiency. We will have to re-conduct work.
9. No settings do not need to perform after replacement.
10. The zero mark on the controller will allow you to determine that the throttle is completely closed.

What to choose?

When replacing many more or less experienced car owners, the question arises, which regulator is better to install. After all, there are two types.

Sensor type	Features
Film-resistive	Such sensors are usually installed by the manufacturer. The resource of such a throttle valve position sensor is about 55 thousand kilometers according to statements, but in practice it has to change more often
Contact	The operation of such a device is based on a magnetic resistive phenomenon, an element of the Hall is applied. In terms of cost, it is noticeably above the first option, however, it is unlikely to have to change it. The resource is huge, reliability is high

In pursuit of savings, many forget about the importance of quality. But it should be in the first place when choosing spare parts when repairing a car.

DPDZ is an important, but easy-to-replace device. You will have no more than an hour to repair the repair operation even if you just start to comprehend the charms of self-repair of the car.

But in no case, do not tighten with the repair of the sensor, otherwise it may adversely affect the operation of the engine, its resource and the cost of fuel, which you will overcome due to incorrect data from the sensor on the ECU.