Signs of malfunction of the air flow sensor on the VAZ 2114 - repair and replacement

Purpose and principle of operation

Many car owners are concerned about how much it costs to purchase such a sensor. It turns out that the DMRV 2114 has a considerable cost, it varies between 2-3 thousand. In this case, you can use both imported products and domestically produced parts. You shouldn’t be surprised that there are corresponding reviews about domestic models.

But you shouldn’t always trust reviews; it’s better to try the products in practice. Although you can find a lot of negative reviews about domestic sensors, they are more affordable.

This sensor allows the engine to operate in different operating modes, involving different loads. If we consider the operation of the device, it consists in creating a working mixture of air and gasoline. More precisely, the mixture includes gasoline vapors. The direct task of the product is to measure two indicators that are interconnected:

1. Reaction time.
2. The amount of air that is consumed for the reaction.

If the measurements are accurate, the device can determine what mixture the engine requires. This allows the system to obtain information about the required proportions. There are also situations when the sensor does not work correctly, producing incorrect values.

In this case, the mixture created in the system will not correspond to the current operating mode. As a result, power may decrease and consumption will likely increase. Among the possible consequences may be a deterioration in the dynamics of the car and a disruption in the response of the car.

Attention! The response of parts from different manufacturers may vary significantly. It is important to take this point into account when checking the operation of the sensor.

DMVR device on VAZ 2114

The overall design of the sensor consists of two filaments made of a platinum-based alloy. The threads are heated by electric current, with one being the working thread and the other being the control thread. The working element is located in the air flow supplied to the engine, which cools the part. As the temperature of the filament changes, resistance increases or decreases. The data is compared with the parameters of the control element, and based on this, the amount of air passed is automatically calculated.

On later VAZ 2114 models, thermistors began to be used, which have increased durability and measurement accuracy. This is exactly the sensor that is used on the VAZ 2114.

Where is the mass air flow sensor located?

The mass air flow sensor on the VAZ 2114 is located in the air duct located behind the air purification filter. A wiring harness is connected to the sensor, ending with a plug.

Installation location of the air flow sensor on the VAZ 2114 engine

Sensor design features

The VAZ 2114 can use mass air flow sensors of domestic and imported origin. The design of the devices is the same and corresponds to the diagram below.

Design of the air flow sensor VAZ 2114

The DMRV includes:

• 1 — block for connecting the wiring harness;
• 2 — sensor operation controller;
• 3 - measuring element;
• 4 — outer body;
• 5 — metal protective mesh;
• 6 — guide deflector;
• 7 — fastening the sensor body to the body;
• 8 — direction of air flow.

Sensor repair

Any electronic device has a huge disadvantage: sensitivity to the slightest power surges, pollution, aggressive environmental influences and many other factors. If even a tiny particle of dirt or dust gets into the air flow entering the engine, it will certainly settle on the sensor, which, being so vulnerable, attracts such troubles to itself like a magnet.

Continuing to work in this state, he is forced to increase the load, as dust ballast interferes with him. Consequently, it starts to fail. Also, if low-quality oil or bad gasoline is poured into the engine, all this first of all has a very negative impact on the electronic device. That is why it is so important to pay attention to air, oil and other filters and not to skimp on the quality of fuels and lubricants poured into the engine.

Having made sure that the VAZ mass air flow sensor is faulty, we move on to the next stage - repair. Repair consists of a good cleaning. But how is the mass air flow sensor cleaned and is it possible to do this work with your own hands? To begin with, you should remember, like a multiplication table, that in no case should you use the following for flushing:

For cleaning, use carburetor cleaning fluid. The most popular in this matter is WD 40, which has good technical properties and is safe for electronic devices. You need to wash the sensor carefully so as not to damage the thinnest plates and wiring.

After making sure that there is no more dust or debris in the device, you can, after thoroughly drying it, install it in place. As a rule, after such a simple procedure, the device should work like a good Swiss watch. We have discussed the most frequently asked questions regarding the mass air flow sensor. Now you know why it breaks, what needs to be done to protect it, and what to do if it suddenly malfunctions. We wish you good luck on the roads and good mood!

Types of mass air flow sensors

We will consider a sensor that makes it possible to determine the volume of incoming air using the example of the VAZ 2110. In the VAZ-2110, as in other cars, the device is located inside the air pipe, near the filter, and is responsible for recording the air flow coming out of the filter.

Mass air flow sensors are constantly being improved; today there are several meters that calculate consumed air:

1. The main component is a pitot tube. The plate fixed in the sensor changes position under the influence of air flow. The inclination angle of the plate is measured by a potentiometer, which in turn changes the resistance. This serves as a signal for the control unit to determine the volume of incoming air.
2. The mass production of modern mass air flow sensor devices requires the presence of hot-wire measuring mechanisms in the sensors. The heat exchanger contains 2 thin plates made of platinum. After energy is supplied to the plates to warm them up, one of them remains working, and the second - control. The MAF sensor in this design makes it possible to ensure a constant, identical temperature touching the 2 plates.
3. The working elements of the film meter are silicon wafers coated with platinum.

Full list of VAZ 2114 sensors: name and location

Most of the units we are considering are located in the engine compartment. We present to your attention a diagram of the arrangement of sensors on the VAZ 2114 engine:

The location of the sensors must be known to the responsible motorist

List of VAZ 2114 sensors:

• Camshaft position (phase sensor);
• Coolant temperature;
• Detonation;
• Oil pressure;
• Oxygen sensor (lambda probe);
• Kneeshaft position;
• Speed;
• Idle move;
• Mass air flow;
• Fuel level;
• Gasoline level;
• Antifreeze level;
• Throttle Positions

Now let's look at the sensors and their location in more detail.

Crankshaft position sensor

DCP is a device that supplies the computer with information about the position of the crankshaft. The correct functioning of the fuel mixture supply and ignition systems, as well as the injectors of the injection engine, depends on the operation of this unit.

This device is often called a synchronization sensor, since the ECU, based on information received from the DCPV, determines the moment of fuel injection into the engine cylinders. If the DCPV breaks down, incorrect information will be supplied to the brains of the fourteenth and the engine will lose its performance, since there will be malfunctions in the fuel supply system and the injectors will not be able to function normally.

On the fourteenth, inductive type DCPVs are installed, the approximate cost of a new device is 150 - 200 rubles. The DCPV is located near the alternator belt, near the camshaft.

Camshaft position sensor

DPR is often called a phase sensor. This device is available on all fourteen cars with 16-valve engines, and on VAZ-2114 with 8-valve engines with phased injection of the fuel mixture.

The DPR transmits data about the current operating cycle of the power unit to the ECU:

1. Which valve is open?
2. What valve timing is being implemented at the moment.

Based on the information received, the ECU determines the timing of fuel injection so that gasoline is supplied just before the intake valve opens.

The device is located on the engine, near the cylinder head, not far from the air filter.

Throttle position sensor

TPS is one of the key devices, the correct functioning of which depends on the operation of the fuel system. As the name implies, TPS transmits information to the brains of the fourteenth about at what angle the throttle valve is placed at a particular moment in time

One of the main characteristics of the TPS is the frequency of the signal, based on the change in which the engine control unit determines the degree to which the gas pedal is pressed, which allows the brain to select the optimal engine cooling mode and the amount of fuel supplied.

TPS is part of the throttle assembly. It is located on the throttle body, next to the idle speed sensor.

Knock sensor

A properly functioning DD is the key to the normal functioning of the fourteenth engine. If it breaks down, the engine will run rough and gas mileage will increase.

The DD reacts to engine vibrations, information about which is transmitted to the ECU, which allows the ECU to select the correct ignition timing (the moment of ignition of gasoline in the cylinder).

The device is mounted on the engine cylinder block next to the fan, between the 2nd and 3rd cylinders.

Coolant temperature sensor

DTOZH (also referred to as the VAZ 2114 engine temperature sensor) is located at the place where the inlet pipe is located on the body of the cylinder cooling system, to which the antifreeze supply pipe is connected.

DTOZH is distinguished by its durability and simplicity of design; its only task is to monitor changes in the temperature of the fluid in the engine cooling system. The ECU uses data received from the DTOZH to adjust the crankshaft speed, the ratio of the mixture of gasoline and air, and to select the ignition timing.

What factors cause the mass air flow sensor to fail?

Most often, the device fails for reasons such as:

• Internal defects of the part;
• Oxidation of contacts;
• Poor wiring connection;
• Short circuit;
• Dust ingress;
• Filling with oil;
• Mechanical damage to the element.

Often, a malfunction of the mass air flow sensor occurs due to careless actions of the owner. For example, after careless washing of the power unit or during maintenance or repair. Failures associated with broken contacts or wiring can be corrected by cleaning the connections or repairing the break. Other problems usually require replacing the sensor. But if it becomes dirty with dust or oil, it can sometimes be cleaned. Most faults can be diagnosed by yourself. Some of them are visible during inspection, the rest are determined when checked by a tester. If self-diagnosis does not help you find the cause of the breakdown, it is recommended to contact a car service center.

Signs of malfunction of the DMVR

Mass air flow sensor design

Signs of a malfunctioning mass air flow sensor can be direct or indirect. Let's consider all possible options:

1. Check Engine light on the dashboard. In most cases, the CHECK indicator lights up due to the failure of one of the sensors, so you need to connect to the ECU to accurately determine the fault.
2. A drop in power is only an indirect sign, since there may be another reason for this malfunction.
3. Increased fuel consumption. Of course, everything can be attributed to the fuel pump, but the fuel pressure sensor must also be checked. About standard fuel consumption indicators here.
4. Reduced acceleration dynamics. An incorrect amount of air mixture that enters the combustion chambers produces a poor ignition mixture, which in turn does not allow the car to accelerate normally and leads to jerking when the gas pedal is sharply pressed.
5. Poor starting or inability to start. A rich or lean fuel mixture cannot detonate normally, which will lead to just such problems. It is also possible that fuel will not burn through and there will be popping noises in the muffler.
6. Floating idle speed. Different amounts of air entering the fuel mixture will have an effect when the speed will either decrease or increase.

To accurately determine the malfunction of the DMVR sensor, it is necessary to diagnose it.

Main symptoms

So. If you have problems with your mass air flow sensor, the signs of a malfunction can be very different. Among them are failures during acceleration, lack of traction, and decreased power. There is a persistent feeling that the car simply “does not go.” If there is no proper response when you press the gas, then this is one of the signs. High fuel consumption is also a signal for diagnosing this sensor. When your car stalls when shifting from gear to gear, it makes sense to check the MAF sensor. The VAZ 2110 has the same symptoms of malfunction as other cars.

If you have difficulty starting a cold engine, if the engine operation is unstable, if the speed spontaneously increases or, conversely, decreases, if detonation occurs under load - these are all signals for checking and diagnosing the sensor.

Diagnostics using a multimeter

Diagnostics can be performed using a multimeter; for this we recommend that you read the operating instructions for the tester. The device must be configured in the DC voltage measurement mode; it is usually marked with the symbols DCV or V.

To ensure that connecting the device does not cause difficulties, you need to know exactly the pinout of the device:

• black-red or pink contact is a connection to the control module;
• green is ground (grounding, ground), connected to the body or battery;
• gray-white contact - output voltage;
• yellow - used to supply current to the input.

Diagnostics with a multimeter is performed as follows:

1. To begin with, the tester should be turned on and the voltage value set on it to 20 volts, and then the probes from the device are connected to the corresponding contacts on the plug.
2. To make the connection more convenient, you can use pins; you will need two of them. Each of them is installed in a hole with green and yellow contacts. Then you will need to connect the probes of the device to these pins.

On a working device, the voltage level will be around 1.01-1.04. If the readings are between 1.02 and 1.05 volts, this indicates that the device will need to be changed in the near future. If the readings obtained are higher, then the flow meter must be replaced because it is faulty.

It should be noted that during operation, the voltage parameter will only increase, since the resistor components of the device wear out, and the resistance value, accordingly, decreases. You can also accurately determine the voltage using the on-board computer, if it has the appropriate function. To search, go to the flowmeter voltage section and find the U value.

Step-by-step instructions for DIY diagnostics

1. Turn on the ignition, but do not start the engine.
2. Switch the tester or multimeter to voltage measurement mode. Set the scale limit to 2 volts.
3. Connect the probe with the red wire from the voltmeter to the sensor terminal (the yellow wire goes to it).

   
   To make it easier to measure the output voltage, use a pin. Be careful not to damage the insulation

4. Connect the black probe to the “Ground” contact (black-green wire).
5. We record the value of the voltmeter.

The serviceability of the sensor is judged by the voltage value. To help the driver, below is a small table:

Visual inspection

Here we need to carefully examine the surface of the corrugation and consumables. To check the condition, we need to loosen the air intake clamp at the outlet of the mass air flow sensor, and then pull it off. If you see traces of grease or condensation on the surface, then most likely they have damaged the unit. Sometimes the sensor can be “reanimated” by removing all the dirt. It ends up in the consumables due to rare changes of the air filter. If liquid appears on the sensitive element, this is a 90% failure. Lubricating oil enters due to a clogged oil separator or due to an increased level in the crankcase.

Drops of oil on the sensor are a sure sign that it has failed.

If the above-described elements are detected, the diagnosis can be completed. If the surface is clean, move on. Remove the consumable from the air filter. It is held in place only by 2 screws, which are unscrewed with the 10th key. Looking at the photo, we see that there is an o-ring on the front of the mass flow sensor. It is installed for sealing - unfiltered air cannot leak through the inlet.

If this ring (in the photo it is green, but your color may be different) has slipped or remains in the filter housing, then a layer of dust can be found on the consumable mesh. Such a defect is enough to cause the sensitive element to fail. You need to assemble the unit according to the following scheme: check the reliability of the sealing skirt, put on the rubber ring, place the sensor in the air filter housing.

Description

The mass air flow sensor (MAF) is located near the air filter to determine the amount of flow passing through the air filter. When a sensor fails, the controller usually generates an error, but if the sensor simply does not meet its original characteristics, this can affect the power characteristics of the machine.

How to check

You can check the serviceability of the sensor as follows: - If you notice that the car has begun to accelerate sluggishly and there is a suspicion of a mass air flow sensor, then you can check this in a simple way. 1. Disconnect the sensor connector. 2. Start the engine. 3. Engine speed should become more than 1500. Try to drive. If you feel that the car has become “faster”, then this indicates a malfunction of the mass air flow sensor; it should be replaced with a new one.

Differences between different versions of mass air flow sensors

There are 3 modifications of air flow sensors: 004, 037, 116. 004 was placed under the Rossiya 82 toxicity standards. 037 was installed on an ECU with a resonant DD and “Russia 83” or “Euro-1” standards. The 116 version was installed on Euro-1 and Euro-2 cars. The latest version of the MAF 116 has a built-in air temperature sensor. Therefore, sensors 004 and 037 (they do not have a temperature sensor) can be replaced with 116, but not vice versa.

Different versions of sensors differ slightly in calibrations. If you install a different version of the sensor (for example, 116 instead of 037), then you need to adjust its calibrations in the controller firmware.

Calibrations of versions 037 and 116 DMRV

Below are instructions for replacing the sensor.

Causes of malfunction

Common to most domestic cars, the reason why the VAZ 2114 air flow sensor breaks is hidden in the crankcase ventilation system. It has two circuits that ensure operation with the throttle valve open or closed. If the throttle is buried, crankcase gases are discharged along the line (d=1.5 mm) into the space available behind it. A certain percentage of these gases accumulates in the idle line, where it comes into contact with the film-coated MAF resistor. It is also sensitive to fluctuations in the gas mixture in the intake system. The resin settles on the surface of the resistor, and the sensor begins to “lie.” Because of this, the idle air control sticks, and it begins to jam when starting the engine.

Why does the breakdown occur?

The most common problem that causes the MAF sensor to fail is related to the crankcase ventilation system. The system consists of two circuits: 1. ensures operation with the throttle open (which has greater performance); 2. Ensures operation when the throttle is closed. In the case when the profile is closed, crankcase gases move partially along the idle line, since they enter not only into a special line. The measuring resistor of the sensor has a film coating, with which the crankcase gases come into contact along the idle line. During operation, the resistor is also affected by the gaseous environment in the intake tract. All this leads to an increase in error readings. This can be felt when the engine starts, when the idle air control sticks slightly.

Checking with a multimeter

Of the entire list of sensors in a car, the DMRV is the most expensive. Its cost in auto parts stores reaches 3000-4000 rubles. There is also a possibility of purchasing a counterfeit or inappropriate spare part model. Before the replacement procedure, you should make sure that the element gives the correct readings on the multimeter. A step-by-step check of the sensor using a multimeter looks like this:

• To begin, set the multimeter to DC measurement mode (readings up to 20 V);
• Use a red probe to connect to contact number 5, and connect a black probe to the third contact;

• Without starting the engine, turn the ignition key to the last position.

For a convenient interpretation of the readings from the multimeter, we will provide a complete table of voltage showing the wear of the part.

This element is quite sensitive to dirt, oil and other debris. To prevent its early failure, you should change the air filter more often and monitor the wear of the engine piston group. When there is a lot of wear, oil begins to seep into the intake system, which makes it impossible to take accurate readings of the incoming air.

You can change the mass air flow sensor yourself in a matter of minutes, so there is no need to rush and purchase a new part. Often the problem with floating speed and periodic engine shutdown at idle lies in other malfunctions. Make sure the wiring is intact, the readings are correct, and only then proceed to replacing the element. Below we present the air volume indicators that correspond to the normal operation of the 2114 engine.

How to decipher multimeter information?

• The multimeter shows from 0.006 to 1.01 V - this means that the sensor is still new. In a few weeks, the data will increase by a couple of hundred units.
• If the multimeter data is in the region of 1.01, 1.02 V, they indicate that the sensor is in use mode, this is its operating state.
• The sensor shows 1.03 - 1.04 V, - such readings will indicate that the working reserve is half used.
• Sensor readings 1.04V -1.05V - such readings indicate that the sensor should be replaced with a new one.
• Sensor readings above 1.05 V sent to the ECU are incorrect. Most likely, it does the work incorrectly, or does not do the work at all.

DMRV pinout

• a pink-black cable is responsible for sending data from the mass air flow sensor device to the relay. Designated as contact No2;
• for grounding, green cable. Designated as contact No3;
• white, responsible for powering the mass air flow sensor device. Defined as pin No4;
• The yellow cable is defined as contact No5 and is responsible for transmitting an impulse from the ECU (electronic control unit).

MAF pinout for VAZ 2114

But it is worth considering that the colors may differ from those described above. Sensor manufacturers may replace the described colors with others. Be careful!

Based on the readings of the device, you can easily determine what exactly the problem is. And don’t waste time identifying the breakdown. Also, based on the readings of the multimeter, you can carry out the necessary work, such as cleaning, checking contacts, or replacing a new device yourself. But it’s also worth considering that the tester can overestimate its readings. This is a risk of replacing a completely working sensor with a new one when it does not need it. The sensor parameters depend on the purity of the masses in the circuit.

Necessary equipment

To work, you will need a car multimeter. A wide variety of models are on sale, their prices vary from 350 to 15 thousand rubles. The costs are quite justified, since you can independently test the on-board electrical network as needed without a trip to the service station. For example, the cost of diagnosing a mass air flow sensor as of August 25, 2019 in car services is on average 500 rubles.

Voltage readings of a working and faulty sensor

• 1.01-1.02 - readings of the new sensor, everything is normal.
• 1.02-1.03 - there is wear, but the parameters are within normal limits.
• 1.03-1.04—the parameters are working, but there is already wear.
• 1.04-1.05—critical parameters, get ready for replacement, if you have the money, then we’ll change it. Fuel consumption may be reduced.
• 1.05 and higher - the mass air flow sensor is not working.

Measurement using paper clips - there may be an error on the device. According to the readings, it is clear that the sensor “ordered to live long”

Preparatory activities

Checking the mass air flow sensor of the VAZ 2114 and other models begins with studying the pinout of the contact group.

For a typical mass air flow sensor it is as follows:

• pin No. 2 is black and pink, it transmits data to the main relay;
• green contact No. 3 – ground;
• white or gray contact No. 4 – node power supply;
• yellow contact No. 5 – ensures the passage of signals from the ECU.

To perform diagnostic measures, the mass air flow sensor does not need to be removed.

If there is oil deposits or condensation on it, the air filter on your car needs to be changed more often. There may be other types of contamination on the device - dirt and dust. In this case, you need to check the oil level in the crankcase, clean the bumper, and replace the O-ring.

Sequence of procedure

First, we prepare the measuring device; the multimeter must be switched to the mode for measuring direct electric current up to 2 Volts.

Further operations are performed in stages:

1. The black end of the measuring device is connected to the third contact, the red end to the fifth. You can connect them with a pin.
2. The vehicle does not start, but the ignition turns.
3. Information appears on the multimeter. Its decoding is given in the table below.

on the multimeter (V)

Mass air flow sensor status

new sensor (after several weeks of operation, parameters increase)

Characteristic

On VAZ cars, the mass air flow sensor is mounted between the air filter element and the throttle hose. Today, products from the manufacturer Bosch are very popular among compatriots. Regardless of whether it is a universal Bosch sensor or, for example, spark plugs, quality from a German manufacturer can always give a head start to domestic products. Let's look at the main characteristics of regulators models 116 and 037.

116

DMRV 116 is designed to control and convert the air flow that enters the motor into voltage. The data transmitted by the regulator makes it possible to determine the operating mode of the power unit and calculate the cyclic filling of the cylinders with air flow. This filling is carried out in steady-state operating modes of the motor, which last no more than 0.1 seconds.

Let's look at the technical features that Bosch 0 280 218 116 has:

• the regulator operates on the principle of measuring air flow;
• the device provides accurate data, which ensures optimal fuel consumption;
• operating range varies from 8 to 550 kg/h;
• the output pulse level when measuring the range from 0 to 100% will be about 0.05-5 volts;
• As for power supply, the controller is powered from the vehicle’s electrical network, that is, 12 volts is enough for it;
• current consumption is about 0.5 ampere;
• the regulator can function normally in the operating range from 45 degrees below zero to 120 degrees;
• The service life of the Bosch 116 mass air flow sensor is about 3 thousand hours.

Bosch 116 device

037

As for the mass air flow sensor 037 from Bosch, the technical features will be similar. The controller consists of two main elements - working and control, as well as a heating resistor device. The air that enters the engine cools one of the controllers, while the electronic module converts the temperature differences between the controllers. In the event that sensor 280 218 037 fails, its options will be performed by TPS.

As mentioned above, the technical features of the models are the same:

• the operating range for normal operation varies in the region of 8-550 kg/h;
• when operating correctly, the controller will provide accurate data, making it possible to achieve optimal gas mileage (of course, if the engine is running in normal mode);
• since the element is used in a car, it is logical that it should be powered by 12 volts;
• the controller consumes about 0.5 ampere of current;
• the part can operate normally both at 45 degrees below zero and at 120 degrees of heat, this is its operating range;
• service life is at least 3 thousand hours;
• Unlike model 116, the new one in calculations can produce an error of 2.5 percent (both down and up).

Regulator model 0280218037

What air flow should be on a VAZ 2114?

The normal operation of an injection engine depends on several parameters. The correct ratio of fuel and air when forming the mixture affects the stability of its operation. Underestimated or overestimated indicators of the volume of air consumed by the motor indicate a malfunction in the system. If the system elements are in normal condition, the air flow sensor should be checked. If any shortcomings are observed, it is worth replacing the mass air flow sensor on the VAZ 2114.

For idling at 850-900 rpm, the volume of air consumed is ten kilograms per hour. At 2000 rpm this figure rises to 21 kilograms. The data given is typical for a 1.5 liter engine. A significant deviation from the norm clearly indicates the presence of a malfunction or contamination of the mesh in the housing.

How to extend the life of MAF

The reliability and durability of the air flow sensor depends entirely on the condition of the air itself.

That is, you need to monitor and regularly change the air filter, preventing it from becoming completely clogged, getting wet in the rain, as well as installation with errors, when gaps remain between the housing and the filter element.

It is also unacceptable to operate the engine with malfunctions that allow back emissions into the intake channel. This also destroys the MAF.

Otherwise, the sensor is quite reliable and does not pose any problems, although periodically monitoring it with a scanner will be a good measure to maintain normal fuel consumption.

Common malfunctions of VAZ 2114 sensors

Let's briefly and essentially touch on the malfunctions of each sensor in the electronic engine management system. VAZ 2114

Purpose of the mass air flow sensor

The mass air flow sensor is a complex electronic device that regulates the fuel injection system into the engine cylinders. It is responsible for how much air is contained in the engine. It is known that in order for the power unit to come into action, it is necessary that air and fuel be supplied in half. Then an atmosphere is created inside the equipment that is ideal for striking a spark and setting all mechanisms in motion.

The difference is significant. The system, receiving this information, trustingly follows it. The proportions of air and fuel are disrupted, and a slightly smaller amount of fuel is injected, which is called a “lean mixture.” Symptoms of this problem are a sharp decrease in engine power, controllability and dynamics. The consequence of this “disease” is the engine’s refusal to start. And then the driver has to puzzle over what actually happened.

Therefore, from time to time you should check the working condition of the sensor, so as not to waste much more time on engine diagnostics. There are several ways to check the sensor, but the most popular is diagnostics using a multimeter - a simple device that every car owner would do well to keep in his toolbox.

How to check the air sensor yourself

So, if the driver exhibits the signs discussed above, then the sensor needs to be checked. By the way, it is important to understand that the symptoms of a malfunction of the VAZ 2114 DMVR can be very similar to the symptoms of malfunctions of other components of the car. For this reason, diagnostics are necessary before starting repair work.

To do this, you need to know how to check the mass air flow sensor on a VAZ 2114. Let us immediately note that this can be done with a multimeter. To check the mass air flow sensor, you do not need to go to a service station; it is enough to purchase a regular tester (multimeter) and know the pinout of the contact group.

DMRV pinout:

• contact “5” - supplying an incoming signal from the electronic control unit (yellow wire);
• pin “4” - power supply to the device (gray or white wire);
• contact “3” - grounding (green wire);
• contact “2” - transfer of information from the sensor to the main relay (pink-black wire).

To check the VAZ 2114 mass air flow sensor using a multimeter, do the following:

• Set the multimeter to DC measurement mode up to 20 V.
• connect the red wire from the multimeter to pin “5”, and the black wire to pin “3”;
• Turn the ignition on without starting the car and look at the multimeter readings.

Decoding multimeter readings:

• tester reading from 0.006 V to 1.01 V - the voltage of the new sensors, after several operating weeks the voltage increases by several hundredths of units;
• tester reading from 1.01 V to 1.02 V – normal operating voltage of the sensor under normal operating conditions; We also recommend reading the article about what TPS is and how the sensor works. From this article you will learn what signs of a malfunction of the throttle position sensor can be identified and how the TPS is repaired or replaced.
• tester reading from 1.03 V to 1.04 V - the sensor has used up its working life by only half;
• tester reading from 1.04 V to 1.05 V – the sensor is badly worn and requires replacement;
• the tester reading is above 1.05 V - the sensor does not work at all or does not work correctly (the signals sent to the computer are highly distorted).

Then, based on the indications, appropriate repair work is carried out. In some cases, you can limit yourself to cleaning, checking contacts, etc. Others will require a complete replacement with a new device.

About verification

The most accurate method for checking a malfunction is to replace it with one that is known to work, but not everyone has this opportunity and this is normal. Therefore, I suggest, as an option, to travel without a sensor. So, we open the hood, direct our gaze to the area of ​​the air filter, and see a plate with a chip on the air intake pipe. We remove this chip from the sensor. The ECM will go into emergency engine operation mode, in which the fuel mixture is prepared only according to the throttle position. Now start the engine and look at the tachometer. The speed should be about 1500 rpm. We get underway and, after driving a little in various modes, we notice how the car behaves. If you feel that traction has appeared and the car is “fluttering,” we can state that the mass air flow sensor is dying.

As for more accurate diagnostics, here we need a multimeter.

I think many people have it. If not, ask your acquaintances and friends; people call him a “tester.”

The bottom line is that we need to measure the voltage at the sensor terminals in the connected state, that is, the chip must be plugged into the sensor.

To avoid damaging the insulation, you can do this. We take two thin needles and tightly wrap them to the multimeter probes. The main thing is that the contact is good. If you have a cambric, it is better to use it to fix the needles on the probes.

Now we look for the yellow and green wires . Yellow – plus, Green – mass. Carefully insert the needles under the insulation of the wires and hold or fix it all.

Now switch the multimeter to DC measurement mode and set the measurement limit to a lower value. If there is a limit of 2 Volts, then it will be enough.

Now turn the key, turn on the ignition, but don’t start! We look at the multimeter display and compare our result with the following values:

Removal and replacement

If the VAZ 2114 air sensor was checked, and the check confirmed incorrect operation, then you should think about replacing it. Experts do not advise rushing to throw away a part, even if it is not working correctly. Sometimes it happens that after cleaning the contacts it starts working again. It is worth paying attention to this possibility if you would not like to replace the part.

When it is not possible to revive an existing part, you should go shopping. A new part will not be cheap, it is an expensive pleasure. That is why experienced technicians advise initially checking the functionality of the old sensor before spending your savings. To replace the product, you will need to prepare a flat-head screwdriver, as well as a 10mm wrench.

The sequence of actions should be as follows:

1. Initially, the ignition is turned off, the hood is opened, and the negative terminal is removed from the battery.
2. Now you have to determine where exactly the sensor is located. Usually there are no difficulties with its location. In the engine compartment you can see the air filter unit; it is made of plastic. This sensor is located on its rear part; it is usually mounted on the air filter pipe.
3. Next, the clamp made of metal is removed and the product is connected to a corrugated hose through which air is supplied.
4. You will need to pull off the corrugated hose.
5. Next, the contact block is removed, and it should be taken into account that there is a button on the bottom of the plug. When pressed, the spring wedge is released. This is necessary to freely pull out the block.
6. A pre-prepared 10mm wrench is needed to unscrew the bolts one by one; they are used for fixing. By the way, the second of them is located on the lower part of the case.
7. All that remains is to remove the sensor.

Necessary tools and spare parts

Before starting work, you should clarify which part number is stamped on the body of the old mass air flow sensor. Different sensor options were installed on different 2114 engines. Two types of article are common - 037 or 116 . Getting to the room without dismantling the case is problematic.

After determining the part number, you can begin preparing the tools and spare parts that will be useful for replacement:

• A flat or Phillips screwdriver for removing the air filter housing;
• New metal clamps (in case of breakage or wear of the old fastening);
• Spanners for unscrewing fastening nuts;
• A working mass air flow sensor to check changes (as soon as you are sure that there is a problem with it, purchase a new one).

The advantage of owning a 2114 model is that to check the functionality of the sensors, you can always find known working parts on the car of an acquaintance or friend. This simplifies the diagnostic process and can save money. To replace it yourself, it is enough to know where the mass air flow sensor on the VAZ 2114 is located.

Prevention of breakdowns and cleaning of the air flow sensor of the VAZ 2114

The flow meter sensor is located in a vulnerable place: exposure to temperature changes, moisture, dust.

Precision electronics located in the measuring channel fail when foreign objects enter.

Causes:

• untimely replacement of the air filter;
• the use of so-called “zero” filters;
• loose connection of the mass air flow sensor with the air duct flanges;
• moisture entering the air intake;
• Debris left in the ductwork or filter housing after repairs and maintenance.

How to clean the mass air flow sensor if contamination does not render it inoperable

The sensor must be removed, the protective nets removed, and blown with clean compressed air. If there is dried dirt or oil stains, washing with special means for mass air flow sensor is required. Of course, it is necessary to clean the air duct itself with the filter housing.

In most cases, such prevention brings the flow meter back to life.

What's the result?

As you can see, if there are signs of problems and the first symptoms of the DMVR VAZ 2114 or another car appear, you should check the device as soon as possible for possible breakdown. In this case, you can quickly diagnose the air flow sensor with a multimeter in a regular garage.

We also recommend reading the article about what a car engine knock sensor is. From this article you will learn about the purpose, design, as well as signs of malfunction or malfunction of the engine knock sensor. Based on the readings obtained from the device, it is possible to determine the malfunction (if a breakdown is confirmed) or to exclude the mass air flow sensor from the list of possible problem elements. One way or another, it is important to understand that this sensor is actively involved in mixture formation and affects the operation of the engine as a whole.

For this reason, it is necessary to perform regular checks of the ECM, scan for errors, and also pay attention to any failures and symptoms of malfunctions of the sensors of the electronic engine control system (TSP, DPKV, etc.).

Evgeniy (auto expert) “Turn the Engine” is dedicated to one of the greatest blessings of civilization - the piston internal combustion engine. Everything about the operation, service and preventative maintenance of gasoline and diesel internal combustion engines. Useful information on engine and attachment repairs, methods and techniques for carrying out diagnostic procedures. Tuning, engine tuning and competent selection of technical fluids.

What is the difference between sensors 037 and 116?

How can the regulators of these models differ from each other and is it possible to install 116 instead of 037? There are differences between these controllers, and the point is not in the MAF pinout. After all, if these models were the same, what would be the point of giving them different names?

So, how do the controllers differ from each other and is it possible to install model 116 instead of 037:

1. The first difference that can be guessed based on the technical characteristics is that the 037 model can produce data with an error during operation. Of course, an error of 2.5% is not critical, but it does exist.
2. Device 037 is intended for installation in VAZ 2111, 2112, 2123, 21214 cars, which are equipped with controllers M 1.5.4, January 5.1-5.1.3, etc.
3. As for model 116, its use is relevant on Ladas 21114, 21124, 21214. Installation of this device is allowed on Kalina and Priora. Installation of the device is allowed on cars equipped with M 7.9.7 and January 7.2 controllers.

If you encounter a problem with the device not working, then when replacing it you need to install the same model that has already been installed. But it is worth considering that 037 is not a common option like 116, so it is more difficult to find. The latter, in turn, is more common, and its cost is lower.

Replacement is allowed, but experts do not recommend this. This is because these devices differ in their calibration, so in case of replacement, you will have to change the parameters of the control unit. And you can only get into the “brains” of a car if you understand what needs to be done and have minimal experience.

Good day!

The subject is this: I have a VAZ 21140 2004 model year. with brains BOSCH 7.9.7. On it the mass air flow sensor died, the readings are 1.02-1.04, depending on the case, and secondary signs: the revolutions drop when the clutch is depressed to 500-600, increased fuel consumption (11-12l/100km), difficult cold starts.