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.
DMRV sensor 2110: how it works and works
The VAZ mass air flow sensor is a fairly simple device, consisting of a housing and a thermal anemometer located inside it (a device for measuring the amount of air). The hot-wire anemometer contains two platinum filaments that are heated by electric current. Air passing through one thread cools it, the second thread is the control.
The amount of air (air consumption of the VAZ 2110) entering the internal combustion engine of the car is determined by changing the current passing through a platinum filament cooled by the air flow. The sensor is located under the hood of the car between the air filter and the corrugated hose directed to the throttle valves.
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:
- “Check Engine” lights up on the car’s dashboard (you need to check the engine);
- fuel consumption increased, acceleration dynamics decreased;
- the car engine does not start;
- at idle, the car’s internal combustion engine operates jerkily (change in idle speed down or up).
All of the listed signs of sensor malfunction indicate that air is not being supplied to the mixture in the volume required. Taking into account the fact that this problem may be associated not only with a malfunction of the mass air flow sensor, before proceeding with dismantling the sensor, it is necessary to make sure that it is faulty.
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.
Algorithm of actions:
- 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.
The next stage of diagnosis may be checking the mass air flow sensor 2110 with a multimeter. This method of checking the sensor for functionality involves the use of a measuring device (multimeter).
Before checking, you need to understand the design of the device and find out its “pinout” (soldering of wires on the board). There are four wires coming out of the MAF. Typically these are the wire to the main relay (pink/black or pink), ground (green), power (gray), and signal input (yellow).
To check you need:
- set the multimeter to constant voltage measurement mode, setting the limit to 2 Volts;
- without starting the engine, turn on the ignition;
- connect the black multimeter probe to the ground wire, the red one to the signal input of the multimeter sensor, inserting the multimeter probes through the rubber seal of the connector;
- take measurements and use the results to determine the state of the sensor.
Based on multimeter readings:
- voltage 0.996-1.01 Volts (new sensor);
- voltage 1.01-1.02 Volts (working sensor in good condition);
- voltage 1.02-1.03 Volts (sensor working, with long-term operation);
- voltage 1.03-1.05 Volts (sensor is worn out and may fail);
- voltage from 1.05 Volts and above (the sensor is faulty and requires replacement).
If the device is not at hand, the faulty sensor can often be determined by its appearance, that is, by visual inspection. In this case, it is necessary to dismantle the device and carefully inspect it for mechanical damage or for the presence of liquid in the sensor and air pipe.
The reasons for liquid and dirt getting into the sensor can be different (for example, the oil level in the crankcase is increased, dust gets on the hot-wire anemometer due to untimely replacement of the air filter, the oil sump of the crankcase ventilation system is clogged, etc.).
How to restore the mass air flow sensor?
The main signs of a malfunction of the air flow sensor on a 16-valve VAZ-2112: checking the mass air flow sensor
The optimal solution for problems with the mass air flow sensor is to replace the faulty sensor with a new one. But since the cost of the device is about 2500-3900 rubles, many owners are trying to “revive” the old part.
There are four recovery methods:
- installation of additional resistance;
- blocking part of the air supply channel to the thermistor with aluminum tape;
- updating the engine control unit firmware;
- washing the sensor body and housing from dirt.
Installing additional resistance
Additional resistances are installed in the circuit connecting the sensor to the control unit. When an electric current passes, the voltage decreases, which can be brought to the required limits. The resistance value is selected experimentally. Most often, a 1 kOhm resistor is soldered to the yellow wire and a 15 kOhm element to the green wire.
Blocking part of the air supply channel
The repair principle is based on partially cutting off the air supply to the thermistor. Due to this, less intensive cooling is ensured and it is possible to bring the voltage value to the state of a working device. The cross section is selected experimentally with voltage monitoring using a multimeter. In some cases, owners block the supply channel by 70-80%. Aluminum tape is used for gluing.
Correcting the firmware of the engine control unit
An adjustment means a change in the calibration or operating schedule of the mass air flow sensor stored in the unit’s memory. The dependence graph is constructed in such a way that at a sensor voltage of 0.996 volts, the flow rate is considered equal to zero. But if the sensor fails and the starting voltage is 1.055 volts, then the control unit considers the air supply to be 1.8 kg when the engine is not running. Changing the graph using the MAF Corrector utility will allow you to set the flow rate to 0, which will improve engine performance. This method can be recommended to owners who are well versed in the control unit software.
Do-it-yourself cleaning of the air flow sensor
The air volume sensor is cleaned after it is detected that it is not working correctly. The procedure is performed by partially disassembling and removing the device body with active elements. At the same time, the body is washed and cleaned from remaining leaves and dirt deposits. In many cases, washing the air flow sensor on a VAZ 2114 does not help restore the device’s parameters.
Mechanical methods 2114 are prohibited, as is blowing dust with compressed air.
What products should be used to clean the sensor?
To clean sensors, there are special liquids supplied in pressurized aerosol cans. An example of such a product is a special air flow sensor cleaner Luftmassensor-Reiniger from Liqui Moly. There are similar liquids from other manufacturers. You can wash the sensor with a mixture of 70% isopropyl alcohol and 30% distilled water, after warming the device to 60-70 ºС with a hair dryer.
When washing the mass flow sensor it is prohibited:
- try to clean the sensor with cotton balls, hard objects and brushes;
- use household cleaning products;
- Use carburetor cleaners based on acetone or ether.
Cleaners based on heavy petroleum products, for example, WD40, will remove plaque from working parts, but will leave a greasy film that must be washed off with isopropyl alcohol. The use of ether-containing substances is not recommended due to the destruction of the compound filling and electronic components.
Algorithm of actions
Sequence of steps when washing the mass air flow sensor:
- Remove the sensor together with the housing from the engine air duct. The device is attached with a clamp to the channel and two bolts to the air filter housing.
- Unscrew the two screws securing the sensor to the housing. The bolts have a star head, but many owners unscrew them with pliers.
- Wash the measuring thermistors and the air passage channels with a cleaning agent. If the cleaning method with alcohol is used, the removed sensor is heated with a stream of warm air and placed in a container. The alcohol-water mixture is also heated to 60-70 degrees.
- Dry the sensor.
- Wash the sensor housing with warm soapy water. Rinse under running water and dry.
- Assemble the sensor and install it in place.
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;
When choosing a new sensor, you should focus on both the price and the manufacturer (Siemens, Bosch, etc.). In any case, you can buy a VAZ mass air flow sensor at any auto supply store, taking into account financial capabilities and personal preferences.
We also recommend reading the article about what kind of oil to pour into a VAZ 2110 gearbox. From this article you will learn about the features of selecting a VAZ 2110 gearbox, how much oil is in a 2110 gearbox, and what you need to consider when choosing a lubricant.
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).
General procedure:
- 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.
Mass air flow sensor VAZ 2110: replacement and installation instructions
After dismantling the old non-working sensor, before purchasing, you can ask a friend for a temporary air flow sensor from his car, and then check it in your 2110. If with another sensor the engine works without interruptions, the consumption does not increase, then it’s time to replace your flow meter. This is the simplest diagnosis that can be carried out when the first signs of a malfunction appear.
We have studied the malfunctions and symptoms, what a mass air flow sensor is is now clear. If we succeed in checking, and we know that the flow meter is faulty, all that remains is to replace it. To do this, you need to prepare a replacement unit (you can buy a non-standard model) and a screwdriver. Visual inspection implies analysis, but let’s repeat it again:
- You need to turn off the engine and remove the key from the ignition.
Installing a new element is done in exactly the same way.
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.
It is quite obvious that any malfunction of the sensor will sharply reduce the efficiency of the engine. At the same time, selecting and replacing the sensor is not difficult. The main thing is to choose the right device and follow the instructions above.
We also recommend reading the article on how to replace the cabin filter on a Lada Granta. From this article you will learn when to change the cabin filter on a Grant, as well as how to change the cabin filter on a Grant with your own hands.
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.
