Mass air flow sensor on a VAZ 2110: how to check for a malfunction
VAZ 2110 injection power units are equipped with various kinds of sensors (including mass air flow sensors) that monitor the condition of the engine, control the quality of the fuel-air mixture, the CO content in the exhaust gases and much more. Data read from the sensors is transmitted to the electronic engine control unit (ECU), which checks and evaluates the received parameters, and then makes adjustments to the operating mode of the engine.
What is a DMRV?
Air flow meter location.
The air flow meter of the VAZ-2110-2112 (as well as all Togliatti injection engines without exception) is installed immediately behind the air filter at the entrance to the intake tract.
Its task is to measure the amount and temperature of the air that the engine consumes.
These readings are of paramount importance for preparing a flammable mixture . The flow meter sends data to the engine ECU, which in turn instructs the injectors to prepare a richer or leaner mixture. This is without subtleties.
Sensor device
The sensor itself is a combination of two sensors - control and working, as well as a heating resistor.
As a result, air flow and temperature are converted into electrical impulses understandable to the ECU. This is a very gentle and accurate device; it allows you to calculate the cyclic filling of the cylinders with air and updates the parameters every 0.1 s.
Mass air flow sensor diagram.
The working body of the sensor is a heated platinum thread. It heats up to operating temperature (from 100 to 1000 degrees), and when air enters, it cools down. The amount by which the filament temperature drops is converted into an electrical signal and, based on this value, the ECU calculates the mass and temperature of the air entering the combustion chamber. And based on this data, it prepares the required portion of fuel. In short - yes.
What is a mass air flow sensor and where is it located in the VAZ 2110
Mass air flow sensor is one of the devices involved in controlling an injection engine. The abbreviation stands for: mass air flow sensor. It is entrusted with the task of measuring the volume of air directed into the power unit. The mass air flow sensor works in conjunction with two other sensors: atmospheric pressure and air temperature.
In its modern version, the mass air flow sensor is a hot-wire flow meter. The working element is a thin platinum wire to which voltage is applied. The more air passes through the sensor, the more the wire cools. Therefore, to maintain a constant temperature, it is necessary to increase the voltage, by the value of which the ECU judges the volume of air entering the engine.
The mass air flow sensor notifies the electronic control unit about the amount of air directed into the engine
The serviceability of the device affects the optimal operation of the naturally aspirated engine. The mass air flow sensor is a small device. It is mounted on the air filter housing of the VAZ 2110. From the device there is a pipe to the throttle valve.
The MAF sensor is located on the air filter housing
Principle of operation
What is a mass air flow sensor and what is its operating principle? Let’s say right away that you cannot confuse the mass air flow sensor with the outside air temperature controller, since these are two completely different devices. The primary purpose of the flow meter is to calculate the required volume of air flow that enters the engine cylinders. This air is one of the components in the formation of the air-fuel mixture. The mass air flow sensor itself in the “Ten” is located behind the air filter element.
In order for the engine to operate in normal mode, when forming a combustible mixture, the ratio of substances must be strictly observed - 1:14. If these proportions are not observed, the engine will not operate correctly, which will ultimately lead to excessive consumption of gasoline or a decrease in the dynamics and power of the vehicle. Thanks to the flow meter, the air flow is transferred to the engine cylinders in certain portions. Data on calculating the volume of air flow entering the engine is sent to the electronic control unit. In accordance with the data received, the ECU calculates the required amount of fuel.
When the driver presses the gas pedal, the volume of supplied air flow increases significantly, and accordingly, this leads to an increase in gasoline consumption. If the vehicle moves evenly, then the portions of fuel and air flow that enter the cylinders will also be the same at each cycle. When you press the gas pedal, the throttle opens, which ultimately leads to an increase in the supplied air, and this also contributes to an increase in the load on the power unit.
Signs of malfunction and causes of its occurrence
The driver will learn about a breakdown of the mass air flow sensor by the following symptoms:
- The Check Engine light on the dashboard comes on.
- Fuel consumption increases sharply.
- The car slowly picks up speed.
- A hot engine has difficulty starting.
- The car's power has dropped.
The reasons for the breakdown can be different: from banal carelessness of the driver to mechanical damage. If the air filter is not changed in a timely manner, the air flow sensor becomes clogged faster and is unable to perform its functions. It is especially dangerous for it to get in contact with oil and condensate. The next time you replace the filter, be sure to check the condition of the rubber gasket between the sensor and the filter housing - it protects against the leakage of unfiltered air.
Troubleshooting methods
Among the simplest are the following:
- the sensor is turned off;
- the car is started;
- when the computer does not detect the mass air flow sensor in its control system, the engine is switched to safe mode.
In this situation, air and fuel are supplied taking into account the position of the throttle valve. In this condition, you need to drive 200-300 meters. A malfunction is indicated by the vehicle accelerating too quickly.
It is important to know that the sensor should always be dry and as clean as possible. If oily deposits or moisture are detected on it, an urgent replacement of the air filter is required. Contamination of the device requires:
- checking the oil level;
- cleaning the oil separator installed in the vent hole of the crater;
- replacing the rubber seal.
Diagnostics
To check the air flow sensor uses several methods in garage conditions. They can be done by any car enthusiast and do not require special skills or knowledge.
Easy test of the mass air flow sensor
The easiest way to check functionality: disconnect the sensor and start the car. If there is no sensor in the electrical system, the electronic control unit switches the engine to a safe operating mode. The combustible mixture is prepared only based on the position of the throttle valve. Try driving a few hundred meters - if the car moves “faster”, then it is faulty. It should be replaced.
How to check with a multimeter
The second method involves measuring the voltage between the sensor contacts with a voltmeter.
On a note. Such diagnostics are only possible with a Bosch mass air flow sensor with original numbers: 0 280 218 004, 0 280 218 116, 0 280 218 037.
Step-by-step instructions for DIY diagnostics
- Turn on the ignition, but do not start the engine.
- Switch the tester or multimeter to voltage measurement mode. Set the scale limit to 2 volts.
- 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
The serviceability of the sensor is judged by the voltage value. To help the driver, below is a small table:
| Range of values | Air flow sensor condition |
| 1,01 — 1,02 | good |
| 1,02 — 1,03 | satisfactory |
| 1,03 — 1,04 | resource is running out |
| 1,04 — 1,05 | "near-death" state |
| 1.05 and above | it's time to change |
Help from a friend
The third unique way to test the sensor is to have a friend help you. If you have a friend who owns a VAZ 2110, ask him to borrow his working mass air flow sensor. If after replacement the car with the friend sensor behaves differently, then the mass air flow sensor should be replaced.
Methods for checking sensor functionality
How to check the flow meter yourself? There are several diagnostic options, we suggest you familiarize yourself with each of them (the author of the video is the Bezdelnik TV channel).
The first method is to disable the sensor
This verification method is the simplest. Every car owner can do it. The first step is to turn off the sensor. To do this, you just need to unplug the connector. Then you should start the engine. As a result, the ECU controller will go into emergency mode. And the supply of the fuel mixture will be regulated only using the throttle valve. Idle speed will be around 1500 rpm. After this, you need to check in by car. If the car has improved its dynamic acceleration characteristics, then it makes sense to look for signs of a malfunction of the mass air flow sensor.
Method No. 2 - flashing the electronic control unit
If the standard firmware has been changed, then it is unknown what reaction of the controller is programmed in it in case of an emergency. In this case, you should try to insert a 1mm thick plate under the throttle stop. The turnover should increase. Now you need to pull out the chip from the air flow meter. If the power unit continues to work, then the cause of the malfunction is the firmware.
Method No. 3 - installing a working sensor
Install a known good part and start the engine. If after replacement it begins to work better, the motor does not stall, then replacement or repair of the device is required.
Method No. 4 - visual inspection
To do this, use a Phillips screwdriver to unscrew the clamp holding the air collector corrugation. Then you need to disconnect the corrugation and inspect the internal surfaces of the air collector corrugation and the sensor.
Inspection of duct corrugation
There should be no traces of oil or condensation on them, the surfaces should be dry and clean. If you do not take care of the air filter and change it rarely, then dirt can get on the sensitive element of the sensor and cause it to break. This is the most common malfunction. Traces of oil may appear in the flow meter if the oil level in the crankcase is high, or if the oil sump of the crankcase ventilation system is clogged. If necessary, you need to clean the surfaces using special cleaning products.
Is the air flow sensor covered? Don't rush to buy a new one
A new sensor costs from 2 to 3.2 thousand rubles. But before we run to the nearest store or car market, let’s try to bring the old one back to life. This method of resuscitation does not provide a 100% guarantee of restoration of functionality. But it's worth a try.
First, disconnect the negative terminal on the battery. Remove the sensor from the vehicle. Remove it from the air filter housing. Disassemble the device using a Phillips screwdriver. Be careful with platinum threads, do not touch them with your hands or other objects. Clean with carburetor cleaner. Spray the liquid 3-4 times onto the areas indicated by arrows in the photo. Assemble the mass air flow sensor and install it on the car.
Accompanying photos to the process
If you are a little lucky and act carefully, you will be able to save a couple of thousand rubles.
In conclusion, I would like to note that a drop in power and an increase in fuel consumption do not always indicate a malfunction of the mass air flow sensor. But if such symptoms appear, check the air flow sensor first. Its initial diagnosis can be performed independently. An accurate check is carried out using special equipment at a service station. Be careful with your car - it will save your money and time.
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Checking the air flow sensor VAZ 2110, 2111, 2112
The mass air flow sensor serves to transmit data about the air flow into the engine to the control unit. The sensor converts the volume of air passed through itself into digital data and, using an ADC code, transmits it to the engine control unit. Over time, the sensor wears out and transmits incorrect values.
In this article, we will step by step analyze the process of checking the mass air flow sensor using the example of a VAZ 2110. We will check it using a multimeter and computer diagnostics. Let's compare verification methods and find out which one provides more accurate information. We will also analyze the symptoms of sensor failure and tell you about choosing a new one.
Other tips
Sometimes the sensor cannot work normally after the ECU has been flashed. It is not difficult to verify this assumption in this way. When the engine is idling, the sensor terminal is disconnected. If the engine does not stall, then the problem is most likely in the control unit.
You can find out exactly what is happening with the sensor when diagnosing it with a motor tester, but such equipment is very expensive and usually cannot be found in a private garage. Therefore, to check it is necessary to visit a car service center.
However, there is a fairly simple way to find out whether the mass air flow sensor is working properly. It is usually not difficult to replace it with a new one or borrow it from a friend. If there is a noticeable difference in the operation of the engine, then the control device has become unusable.
Symptoms of a problem
- Increased fuel consumption;
- Black velvety soot on spark plugs;
- Check-Engine may light up on the instrument panel;
- Poor starting of a hot engine;
- Floating speed in idle mode;
- Loss of power and dips during acceleration;
- When the speed drops sharply, the engine stalls;
If any of these signs are detected, immediately check the mass air flow sensor, as an incorrectly formed air-fuel mixture significantly reduces engine life.
Spare part selection
There are sensors on the market in three price categories:
- Inexpensive. Typically these are Chinese-made sensors priced up to 1,200 rubles.
- Average. This category includes sensors from AvtoVAZ and foreign analogues of approximately the same quality. Their price ranges from 1400 to 2600 rudders.
- Expensive. High-quality and reliable mass air flow sensors from manufacturers Bosch or Siemens. Their price can reach 5,000 rubles.
We recommend giving preference to original sensors from AvtoVAZ or foreign analogues in this price category.
Checking the mass air flow sensor with a multimeter
- Set your multimeter to voltage measurement mode with a limit of two volts.
- Connect the positive probe to the fifth contact on the mass air flow sensor connector. The fifth pin produces an ADC signal. To make contact when the connector is connected, insert a pin without damaging the wire.
Connect the second probe to the negative on the battery.
- Turn the key in the lock to the ignition position.
- Place the positive probe on the pin and record the reading.
In our case, the multimeter showed a voltage of 1.02V. The table below shows data on the ADC in volts and the state of the sensor.Most of the resource has been exhausted, collect money to buy a new sensor.
The sensor has served its purpose and it is time to replace it.
ADC (V) Air flow sensor condition 0.0996-1.01 New sensor. 1.01-1.02 A working sensor with a large remaining life. 1.02-1.03 Acceptable condition, but the sensor is far from new. 1.03-1.04 1.05 and higher The sensor is the source of problems in engine operation.
Replacing the mass air flow sensor
- Loosen the clamp securing the corrugated pipe to the mass air flow sensor.
Remove the pipe from the sensor and move it to the side.
Unscrew the two bolts securing the sensor to the air filter housing. The fastening bolts are located diagonally. Ten head bolts.
After unscrewing the fastening bolts, remove the sensor.
After dismantling the sensor, pay attention to the condition of the sealing rubber. If the rubber band is damaged, it must be replaced. You can install a working sensor with a damaged rubber band and the replacement will have no effect. The speed will fluctuate due to air leaks.
How to understand that a breakdown has occurred
There are various signs of malfunction that will be noticeable even to novice car enthusiasts:
- The engine begins to operate unstably when idling. This is felt especially well when it is not warmed up.
- The revolutions begin to “float” after starting, and if you sharply press the accelerator pedal, the mechanism will stall.
- When a sharp release of gas occurs, the speed will not decrease, but will remain at 2000-3000 for some time.
- Even after warming up, the power decreases noticeably.
- If the load is full, the driver will need to engage a lower gear. In addition, it will be difficult to climb uphill and accelerate on highways.
In addition to those indicated, you can notice other “signals” that will also indicate that it is time for the technician to check the air flow sensor.
Thus, cracks may appear on the surface of the corrugated hose connecting the device to the throttle valve.
In addition, it is worth checking how the power supply works, and also inspect the wiring for damage.
The car service also diagnoses the signal level. So, if it is low, then the following options are possible:
- Mass air flow sensor 037 is disabled;
- there is a break in the circuit;
- wires are not connected correctly.
At the same time, experts do not advise limiting yourself only to these signs. To make sure what condition the mechanisms are in, a full inspection is carried out, since such breakdowns may occur against the background of malfunctions of other devices (for example, the air filter may become clogged, etc.). Repair work may be needed to restore the vehicle.
Let's summarize
From the above, we can conclude that you can check the VAZ 2110 mass air flow sensor using a multimeter yourself. By comparing the ADC readings with computer diagnostics, we can say that the test with a multimeter is correct.
It is also worth noting that if you want to maximize the life of the air flow sensor, change the air filter more often. The manufacturer recommends replacement every 30 thousand kilometers. We recommend reducing this interval to 20 thousand kilometers, and if you mainly travel on dusty roads to 15 thousand km. mileage
The process of replacing the MAF VAZ 2110, 2111, 2112 is clearly shown in this video:
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Shutdown
Pulling out the sensor is fairly easy.
It is located in the air filter. This method involves starting the motor with the sensor removed - we need to disconnect its connector. When turned off, the controller starts emergency mode, and new portions of the mixture are calculated based on the position of the damper. We need to drive a little, the speed should be above 1500 rpm. If the car behaves more dynamically without a mass air flow sensor, then the diagnosis is complete - it’s time to change the consumable.
Mass air flow sensor (MAF) 2110: symptoms of problems, diagnosis and repair
DMRV VAZ 2110 (mass air flow sensor) is an electronic device of a VAZ car, with the help of which the amount of air entering the cylinders is calculated. The MAF 2110 transmits the measurement data to the vehicle's electronic control unit, which, based on this information, determines the air-fuel ratio in the air-fuel mixture using a pulse signal.
It is not difficult to guess that the VAZ 2110 air sensor, which is responsible for the composition of the air-fuel mixture, is an important element; the fuel consumption and power of the internal combustion engine depend on the efficiency of its operation. For this reason, it is very important to monitor the condition of the sensor and correctly diagnose the malfunction. Next, we will look at what are the signs of a malfunction of the mass air flow sensor, as well as how to check and how to replace the mass air flow sensor on a VAZ 2110.
Basic faults
The mass air flow sensor rarely fails and requires repair, but it is important to know what the signs of its malfunction are:
- Fuel consumption increases. This can be determined by the on-board computer. If the flow meter malfunctions, fuel consumption increases by a liter or more.
- The car's power decreases.
- Uneven operation of the power unit. The car either accelerates slowly or picks up speed too quickly.
- The engine does not start or does not start the first time.
- Idle speed is floating.
The listed signs do not necessarily indicate a breakdown of the flow meter; the reasons may be the malfunction of other devices, which will require their repair. Therefore, it is necessary to check the serviceability of the flow meter.
What are the malfunctions of the mass air flow sensor in the VAZ-2110
The MAF indicators determine the correct mixture formation of the air-fuel mass in the VAZ-2110. Malfunctions and inaccuracies in the coordinated operation of all components of a single sensor system provoke problems in the operation of the device, and it may also be impossible to start the engine in the car.
When you need to change the DFID sensor 2110: symptoms of sensor malfunction and check
During the operation of a vehicle, the mass air flow sensor 2110 can fail for various reasons, one of which is the long period of use of the device. When a sensor fails, it is usually not repaired; it is simply replaced with a new one. The following symptoms may indicate that the sensor is not working properly:
In fact, the VAZ 2110 mass air flow sensor can be checked for performance using three methods: in motion, with a multimeter, visually. Checking the mass air flow sensor 2110 experimentally (in motion) is the easiest and fastest way. It consists of analyzing the operation of the vehicle’s internal combustion engine when the sensor is forcibly turned off.
- opening the hood, disconnect the mass air flow sensor connector;
- start the car engine;
- since the car will operate in emergency mode, the “Check Engine” light will come on and the amount of air in the fuel mixture will be determined depending on the throttle position;
- Having driven a car operating in emergency mode, you need to pay attention to its dynamics and compare them with the dynamics before the sensor was turned off;
- If the car accelerates faster with the sensor turned off, the air flow sensor is faulty.
Symptoms of malfunction
There are several signs by which you can determine a malfunction of the mass air flow sensor:
- The check engine light comes on on the instrument panel;
- Fuel consumption increases noticeably;
- The car loses dynamics and power, failures occur when trying to increase engine speed;
- Difficulties arise when starting on a hot engine.
But what exactly causes these symptoms? The causes of sensor malfunction are as follows.
- The connector has lost contact.
- The air filter, grilles or sensor temperature detectors are dirty.
- Mechanical damage to sensor elements has occurred.
When the first signs of a malfunction occur, you should definitely check the mass air flow sensor, and then, depending on the situation, clean or replace the device.
Examination
Now let's talk about how to check our sensor. Today, two main methods of checking the mass air flow sensor are used.
- The engine is tested in operation with the mass air flow sensor disconnected. Simply turn off the power from the regulator and start the motor. When the mass air flow sensor is not present during startup, the electronic control unit turns on the power unit in emergency mode. The speed is adjusted to 1500 rpm. After disconnecting the sensor, drive a few kilometers and evaluate the dynamics and power. If the engine is running normally, then the sensor is the cause of the symptoms.
- The second method will require the use of a car tester or voltmeter. After starting the ignition, do not start the engine. The voltage threshold is set on the tester to 2V. The positive probe connects to the yellow wire on the sensor connector, and the black probe connects to the green wire. Next, refer to the table.
| Index | Air flow sensor condition |
| 0,99-1,02 | The sensor is functioning normally |
| 1,02-1,03 | Not ideal, but still acceptable voltage readings |
| 1,04-1,05 | Maximum permissible values that indicate imminent sensor failure |
| 1.05 or more | The air flow sensor has failed and needs to be replaced |
Replacing the air flow sensor
To replace the VAZ 2110 mass air flow sensor, you need a part suitable for this model (the new sensor must have the same markings as the old one). In terms of selection, there are three price categories:
- Chinese-made sensors (relatively inexpensive);
- mid-price sensors from the manufacturer AvtoVAZ and some foreign manufacturers;
- high-quality and reliable, but quite expensive imported sensors;
Replacing the mass air flow sensor itself involves dismantling the old device and installing a new one. The procedure is quite simple, accessible to every car owner and can be done with your own hands. Before replacing the sensor, it is necessary to carry out a number of preparatory work:
- buy a mass air flow sensor with the same markings as on the body of the old sensor;
- prepare the necessary set of tools, screwdrivers of different sizes, wrenches or socket wrenches or wrenches with socket heads;
- multimeter (if necessary).
- Place the car on a level surface, lift the hood, remove the negative terminal from the battery;
- disconnect the mass air flow sensor connector;
- loosen the fastening screw of the corrugated hose with the mass air flow sensor housing;
- using a “10” wrench, disconnecting the hose, unscrew the two mounting bolts of the sensor with the air filter housing;
- Remove the old sensor housing and replace it with a new one, installing it in the reverse order of removal.
Please note that after the repair it is necessary to make a test drive to check the dynamics and power. You may also need to replace the air filter if the existing filter element is too dirty. It is also recommended to blow out the air filter housing with a compressor before assembly.
Let's sum it up
As you can see, the VAZ 2110 mass air flow sensor is a fairly important component of the car in the ECM device. This sensor closely interacts with the computer and determines the degree of enrichment of the fuel mixture with air.
Finally, we note that if the sensor is dirty, it is not necessary to immediately resort to replacement. At the initial stage, it is cleaned, as well as the pipes are treated to remove accumulated debris, dust and dirt, and at the same time, all components of the sensor are inspected. However, if there is no positive result, it is necessary to purchase and replace the device.
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