The mass air flow sensor is a mass air flow sensor on the VAZ 2115. It is installed on the air filter pipe, immediately after it. The mass air flow sensor is responsible for the correct operation of the engine at idle. That is, it controls the flow of air when the mixture is burned.
If the sensor does not work correctly, the mixture in the cylinders may either be too rich, or, on the contrary, there will be air starvation. The result is either increased fuel consumption or unstable idling.
Checking the performance of the mass air flow sensor
If the speed of your car begins to “float”, one of the reasons may be the failure of the mass air flow sensor. To accurately determine its condition, it is necessary to check it. This is done as follows - you need to disconnect the plug from the sensor, thereby turning off its power and starting the engine. If the engine begins to maintain normal operating speeds, the mass air flow sensor may be faulty, but if the speeds still “float” or are higher than the norm, the reason is different.
The cost of the sensor is now about 2000 rubles , so if the speed returns to normal when it is turned off, you can try to remove it and clean it. If this does not help, a replacement must be made.
How to check DMRV 2114, 2113, 2115 8 valves with a multimeter?
Checking the mass air flow sensor model 21083-1130010 with a multimeter is carried out in the following sequence:
- Open the hood of the car;
- Press the lock with your finger and remove the terminal block from the air flow sensor of VAZ 2114, 2113, 2115 model 21083-1130010.
- Take a multimeter and switch it to voltmeter mode:
- We connect the negative probe of the multimeter to the motor housing (to ground);
- We turn on the ignition in the car and measure the voltage at terminal 2 of the wire harness with a multimeter (the numbering of the terminal terminals is marked on the air flow sensor VAZ 2114, 2113, 2115 8 valves model 21083-1130010) The voltage measured with a multimeter at terminal 2 must correspond to at least 12 V. When the voltage is not supplied to the terminal connector or it is less than 12 V, then the battery is discharged, the power line is broken or the ECU is broken.
- Using a multimeter, we measure the voltage at terminal 4 of the air meter connector, twist the wires. The voltage at terminal 4 should be about 5 V. When the voltage does not meet the standard, the sensor power line is damaged or the ECU is broken.
- We dismantle the air flow sensor VAZ 2114, 2113, 2115 8 valves and inspect it for mechanical damage. If mechanical damage to the sensitive elements is visible, then replace the MAF 2114, 2113, 2115 with a new one.
Where is the MAF located?
The sensor is located under the hood on the air filter pipe.
Mass air flow sensor
If you think your sensor is faulty, an easy way to check is to simply unplug it. Namely:
- Open the hood and disconnect the sensor.
- We start the car.
- We look at the tachometer or on-board computer: the idle speed should be more than 1500 rpm.
- If, after removing the sensor, while driving, you feel that the car has begun to gain speed faster, then the mass air flow sensor should be replaced with a new one.
- After the sensor is turned off, the Controller begins to prepare the mixture based on the throttle position.
Useful articles:
- For a more detailed and accurate check, read the article: How to check the mass air flow sensor on a VAZ?
- Before throwing away the sensor, try cleaning it, maybe this will help you: How to clean the mass air flow sensor on a VAZ?
- To find out how to remove and replace the sensor, use the article How to replace the mass air flow sensor?
Checking and repairing at home
There are eight ways to independently check amplitude and frequency mass flow sensors.
Method No. 1 - disabling the air flow meter
The method consists of disconnecting the sensor from the fuel system of the car and checking the functionality of the system without it. To do this, you need to disconnect the device from the connector and start the engine. Without a mass air flow sensor, the controller receives a signal to switch to emergency operation mode. It prepares the air-fuel mixture only based on the throttle position. If the car moves faster and does not stall, it means that the device is faulty and requires repair or replacement.
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.
Method No. 5 - checking the mass air flow sensor with a multimeter
To do this, you need to turn on the tester in a mode in which constant voltage is checked. The limit value for measurements should be set to 2V.
DMRV operation diagram
Sensor pinout:
- The yellow wire is located closer to the windshield. It serves as an input for a signal from the flow meter.
- The white-gray wire is the sensor voltage output.
- The black and pink wire leads to the main relay.
- The green wire is used to ground the sensors, that is, it goes to ground.
The wires may have different colors, but their location is unchanged. To check, you need to turn on the ignition, but do not start the car. The red probe from the multimeter must be connected to the yellow wire, and the black one must be connected to ground, that is, to the green wire. We measure the voltage between these two outputs. Multimeter probes make it possible to connect without disturbing the insulation of the wires.
On the new device, the output voltage ranges from 0.996 to 1.01 V.
During operation, this voltage gradually increases and by its value one can judge the wear of the flow meter:
- if the sensor is in good condition, the voltage is from 1.01 to 1.02 V;
- in satisfactory condition - from 1.02 to 1.03 V;
- the sensor resource ends if the voltage is in the range from 1.03 to 1.04 V;
- a value in the range from 1.04 to 1.05 indicates a near-death state; if there are no contraindications, then you can continue to use the sensor;
- if the voltage exceeds 1.05 V, the mass air flow sensor requires replacement.
ADC flow meter readings
Diagnostics of the mass air flow sensor "Tseshkoy" is not difficult and can be done with your own hands.
If there is dirt on the removed sensor, you can clean it yourself. You can use WD-40 to wash it. To clean the mass air flow sensor, you must first remove the pipe from it, and then dismantle the device itself. Inside the device there is a mesh and several wires - sensors.
They need to be sprayed with cleaning agent and washed. Then let the liquid dry. If dirt remains, the procedure should be repeated. You need to clean the pipe with the same product. It must be free of dirt and oil stains. After replacing the air filter, all parts must be returned to their place. After the cleaning procedure, the functionality of the device can be restored to 80%, the error about the reduced sensor signal level disappears (the author of the video is “24 hours”).
Flushing the sensor will help avoid costly repairs.
Method number 6 - checking with a scanner
Test method:
- Install a diagnostic program on your phone (smartphone), tablet or laptop computer (for example, Torque Pro, Opendiag, BMWhat, OBD Auto Doctor).
- Connect your mobile device or laptop to the diagnostic connector located on the vehicle's electronic control unit using a special cable, Bluetooth channel.
- Launch the diagnostic utility on your phone (smartphone) or computer.
- Wait until the program finishes scanning all vehicle components. As a result, the utility will check the serviceability of each vehicle unit.
- Decipher the error codes that the program will show after the diagnostics are completed.
To perform this method, testers are used:
- K-Line 409/1;
- Scanmatic;
- ELM (ELM) 327;
- OP-COM.
Method No. 7 - checking by Vasya the Diagnosticist
To identify a malfunction of the mass air flow sensor without removing it from the car, you need to:
- Install a program called “VASYA diagnostician” on your laptop (laptop) and run it.
- Connect the adapter to the vehicle's diagnostic port.
- Select the item “Electronics 1” or “01 – Engine electronics” from the “Control unit” tabs to connect to the vehicle’s control unit.
- Go to “Custom Groups”.
- Select 211, 212 (passport value) and 213 (current value).
- Compare current indicators with passport data. If the deviations are high, then it is necessary to replace the mass air flow sensor.
Method No. 8 - using a motor tester
GOOD TO KNOW
This method is used to test frequency-type flowmeters.
To check the mass air flow sensor with a motor tester (oscilloscope), you need to connect it to the sensor (depending on the car brand) and start the engine.
Mass air flow sensor check parameters:
- transient time when the ignition is on;
- air consumption readings at idle and a sharp increase in engine speed;
- voltage in the sensor network.
IT IS IMPORTANT TO KNOW
The output data is individual for different types of engines. Before diagnosis, you should check the current indications with an official representative.
Sensor malfunctions
In this subgroup we will look at the main symptoms of a malfunction of the mass air flow sensor. Symptoms of a non-functioning mass air flow sensor can be completely different:
- failures in engine operation under load;
- the engine stalls when changing gears;
- failures in engine idle speed;
- low car dynamics.
The check engine light does not light up as a result of the death of the sensor, and the breakdown can be determined using diagnostics or an on-board computer (OB). Even if the “CHECK” lights up and then goes out, this will not affect the diagnostic result, so that the error is stored in the trip computer.
Replacement
Replacing the sensor is quite simple; all you need is a 10 mm wrench and a Phillips screwdriver.
- Remove the connector from the sensor;
- Loosen the clamp securing the corrugation to the sensor;
- Unscrew the two bolts using a 10 mm wrench;
- Remove the sensor;
- We assemble in the reverse order;
The replacement process is complete, after this procedure your car should drive like new.
Low signal level
An error on the on-board computer or on the diagnostic card “low signal level” can appear for several of the following reasons:
- The sensor is not connected to the wiring block.
- An open circuit in the circuit to which the sensor is connected.
- The mass in the sensor circuit has broken or oxidized.
- Signal wires are broken or connected incorrectly.
- The sensor signal wires are shorted.
- The mass air flow sensor is not working properly.
- Incorrect operation of the engine control unit.
Principle of operation
The principle of operation of the air flow sensor on a VAZ consists of two parameters:
- DMRV Priora
- Amount of air consumed.
- Reaction time.
Different controllers react differently to these parameters, for example, If the sensor slightly overestimates or underestimates its readings, then the January -5.1 controller, due to the oxygen sensor, detects the error in the readings of 1 mass air flow sensor and adjusts the injection duration. But if the Sensor has a long reaction time, then the controller will not cope with the adjustment, and you will feel failures at the time of acceleration. The Bosch MP7.0 controller reacts more sensitively to this error, which leads to unstable idle speed, but failures during acceleration will be less noticeable than on January -5.1.
DMRV pinout for VAZ 2114, 2113, 2115
The VAZ 2111 (l.5i) and VAZ 11183 (l.6i) engines were installed on VAZ 2114, 2113, 2115 cars. These motors have different methods of connecting the air flow sensor and therefore have slightly different wiring. The pinout options for the mass air flow sensor are presented below.
Pinout of MAF VAZ 2114, 2113, 2115 for VAZ 11183 (l.6i) engine:
- — temperature sensor signal;
- — + 12 V;
- - weight;
- — + 5 V
- - DMRV signal.
Pinout of MAF VAZ 2114, 2113, 2115 for VAZ 2111 (l.5i) engine:
- — ;
- — + 12 V;
- - weight;
- — + 5 V
- - DMRV signal.
Price
We remind you that this sensor is the most expensive of all sensors, its cost ranges from 1500 to 4000 depending on the model.
Home→Catalog→Engine→Power system→Max air flow sensor→Max air flow sensor VAZ-2110,1118,2170, 2123, 21214 1.6 l. (BOSCH) (116) (company packaging LADA)Characteristics
| Supplier code: | 175075 |
| Vendor code: | 21083-1130010-20 |
| Manufacturer: | Lada-Image CJSC |
MAF VAZ-2110,1118,2170, 2123, 21214 1.6 l. (BOSCH) (116) (branded packaging LADA) In stock ( 10 )4,575 RUR + 137.25 to the bonus account MAF VAZ-1118,2170 with email pedal (BOSCH) (branded packaging LADA) MAF VAZ-1118,2170 with el. pedal (BOSCH) (company packaging LADA)Characteristics
| Supplier code: | 155868 |
| Vendor code: | 21700-1130010-00 |
| Requisites: | Product, Product, 00-00001667, DMRV VAZ-1118,2170 with el. pedal (BOSCH) (original packaging LADA), 0.23 |
| Basic unit: | PC |
| Tax rates: | Tax free |
| Manufacturer: | BOSCH |
DMRV VAZ-1118,2170 with el. pedal (BOSCH) (branded packaging LADA) Out of stock RUB 3,430 + 102.9 to the bonus account MAF VAZ-2113-15, 1118-19, 2170, 21214-2123 (from 2005 onwards) Euro 2.3 Pekar MAF VAZ-2113-15,1118-19,2170,21214-2123 (from 2005 onwards) Euro 2.3 PekarCharacteristics
| Supplier code: | 171268 |
| Vendor code: | 21083-1130010-20 |
| Requisites: | Product, Product, 00-00036261, DMRV VAZ-2113-15,1118-19,2170,21214-2123 (since 2005) Euro 2.3 Pekar, 0.31 |
| Basic unit: | PC |
| Tax rates: | 18 |
| Manufacturer: | Fuel systems LLC Pekar |
MAF VAZ-2113-15,1118-19,2170,21214-2123 (from 2005 onwards) Euro 2.3 Pekar In stock (5)3,035 rub.+ 91.05 to the bonus account MAF VAZ-2108-99, 2113-15,2110-12 (1999-2004 onwards) Euro 2 PekarDFMRV VAZ-2108-99,2113-15,2110-12 (1999-2004 onwards) Euro 2 PekarCharacteristics
| Supplier code: | 171267 |
| Vendor code: | 2108-3-1130010-01 |
| Requisites: | Product, Product, 00-00019121, DMRV VAZ-2108-99,2113-15,2110-12 (1999-2004 onwards) Euro 2 Pekar, 0.29 |
| Basic unit: | PC |
| Tax rates: | 18 |
| Manufacturer: | Fuel systems LLC Pekar |
MAF VAZ-2108-99,2113-15,2110-12 (1999-2004 onwards) Euro 2 Pekar In stock ( 2 )2,975 RUR + 89.25 to the bonus account MAF VAZ-2110-12 engineer, VAZ -2123 (eng. 1.5 l.) (BOSCH) (037) (company packaging LADA) MAF VAZ-2110-12 engineer, VAZ-2123 (dv. 1.5 l.) (BOSCH) (037 ) (company packaging LADA)Characteristics
| Supplier code: | 200027 |
| Vendor code: | 21083-1130010-10 |
| Requisites: | Product, Product, 00-00036259, DMRV VAZ-2108-99,2113-15,2110-12,2123 (1999-2004 onwards) Pekar, 0.31 |
| Basic unit: | PC |
| Tax rates: | 18 |
| Manufacturer: | Lada-Image CJSC |
MAF VAZ-2110-12 engineer, VAZ-2123 (1.5 l.) (BOSCH) (037) (branded packaging LADA) In stock ( 10 ) RUR 5,145 + 154.35 to the VAZ MAF bonus account -1118,2170,2123 doors 1.6 16 cells. Priora BOSCHCharacteristics
| Supplier code: | 220569 |
| Vendor code: | 0280218225 |
| Manufacturer: | BOSCH |
DMRV VAZ-1118,2170,2123 doors 1.6 16 cells. Priora BOSCH In stock (2) RUR 3,520 + 105.6 to the bonus account MAF VAZ-2110-15, 2121 (doors 1,7), 2111 s.o. injector (BOSCH) (004) (company packaging LADA) 0280218004 DMRV VAZ-2110-15.2121 (eng. 1.7), 2111 s.o. injector (BOSCH) (004) (original packaging LADA) 0280218004Characteristics
- VAZ 2109: replacing the main brake cylinder on your own
| Supplier code: | 198982 |
| Vendor code: | 21120-1130010-82 |
| Requisites: | Product, Product, 00-00001670, DMRV VAZ-2110-15,2121 (doors 1,7), 2111 s.o. injector “BOSCH” (company packaging LADA), 0.29 |
| Basic unit: | PC |
| Tax rates: | Tax free |
| Manufacturer: | Lada-Image CJSC |
DMRV VAZ-2110-15.2121 (engine 1.7), 2111 s.o. injector (BOSCH) (004) (company packaging LADA) 0280218004 In stock ( 10 ) 8,290 RUR + 248.7 to the bonus account MAF door 405, 406 G-24-31105, G-3302, VAZ-2110-12 engineer, VAZ-2123 (1.5 l.) UAZ-3160 BOSCHCharacteristics
| Supplier code: | 030534 |
| Vendor code: | 0280218037 |
| Manufacturer: | BOSCH |
DMRV dv.405, 406 G-24-31105, G-3302, VAZ-2110-12 engineer, VAZ-2123 (dv.1.5 l.) UAZ-3160 BOSCH In stock (5)4,490 rub. + 134.7 to the bonus account MAF VAZ-2110,1118,2170, 2123, 21214 (1.6 l.) (Kaluga) MAF VAZ-2110,1118,2170, 2123, 21214 (1.6 l.) ( Kaluga)Characteristics
| Supplier code: | 098516 |
| Vendor code: | DMRV-116 |
| Basic unit: | PC |
| Manufacturer: | AUTOTRADE LLC |
MAF VAZ-2110,1118,2170, 2123, 21214 (1.6 l.) (Kaluga) In stock ( 8 )2,670 RUR + 80.1 to the bonus account MAF VAZ-2108-99,2113-15.2110 -12.2123 (1999-2004 onwards) PekarCharacteristics
| Supplier code: | 190538 |
| Vendor code: | 21083-1130010-10 |
| Manufacturer: | Fuel systems LLC Pekar |
MAF VAZ-2108-99,2113-15,2110-12,2123 (1999-2004 onwards) Pekar In stock (3)2,985 RUR + 89.55 to the bonus account MAF VAZ-2104-07 (door 8 class) since 2006 Euro 2 PekarDMRV VAZ-2104-07 (door 8 class) from 2006 Euro 2 PekarCharacteristics
| Supplier code: | 171266 |
| Vendor code: | 2104-1130010 |
| Requisites: | Product, Product, 00-00005917, DMRV VAZ-2104-07 (door 8 class) since 2006 Euro 2 Pekar, 0.27 |
| Basic unit: | PC |
| Tax rates: | Tax free |
| Manufacturer: | Fuel systems LLC Pekar |
DMRV VAZ-2104-07 (door 8 class) since 2006 Euro 2 Pekar In stock (2)2,690 rub.+ 80.7 to the bonus accountBOSCH 0 280 218 225 MAF VAZ 2170 PRIORACharacteristics
| Supplier code: | 244142 |
| Basic unit: | PC |
BOSCH 0 280 218 225 MAF VAZ 2170 PRIORA In stock ( 2 ) RUR 3,780 + 113.4 to the bonus account MAF VAZ-2104-07 injector 5WK97014 (Kaluga)Characteristics
| Supplier code: | 028645 |
| Vendor code: | 2104-1130010 |
| Manufacturer: | LLC "NPP Avtel" |
MAF VAZ-2104-07 injector 5WK97014 (Kaluga) In stock ( 3 ) 4,620 RUR + 138.6 to the bonus account MAF door 405, 406 G-24-31105, G-3302, VAZ-2110-12 engineer, VAZ -2123 (1.5 l. dv.) Kaluga MAF engine 405, 406 G-24-31105, G-3302, VAZ-2110-12 engineer, VAZ-2123 (1.5 l. dv.) KalugaCharacteristics
| Supplier code: | 098517 |
| Vendor code: | DMR-037 |
| Requisites: | Tovar, Tovar, 00-00036263, DMRV dv.405, 406 G-24-31105, G-3302, VAZ-2110-12 engineer, VAZ-2123 (dv. 1.5 l.) Kaluga, 0.31 |
| Basic unit: | PC |
| Tax rates: | 18 |
| Manufacturer: | AUTOTRADE LLC |
DMRV dv.405, 406 G-24-31105, G-3302, VAZ-2110-12 engineer, VAZ-2123 (dv.1.5 l.) Kaluga In stock ( 1 )2,670 rub.+ 80.1 per bonus accountBOSCH 0 280 218 037 Mass air flow sensor LADA 110/111/112Characteristics
| Supplier code: | 071698 |
| Vendor code: | 0280218037 |
| Manufacturer: | BOSCH |
BOSCH 0 280 218 037 MAF LADA 110/111/112 In stock ( 8 )4 820 RUR + 144.6 to bonus accountBOSCH 0 280 218 116 MAF LADA 110/111/112/117/118/119Characteristics
| Supplier code: | 071709 |
| Vendor code: | 0280218116 |
BOSCH 0 280 218 116 MAF LADA 110/111/112/117/118/119 In stock ( 10 )4,450 RUR + 133.5 to the bonus account MAF VAZ 1117-19 Kalina, 2170-72 Priora, LADA 4x4 (21214, 2131 ) with electronic accelerator pedal PekarCharacteristics
| Supplier code: | 502699 |
| Vendor code: | 2170-1130010 |
| Manufacturer: | Fuel systems LLC Pekar |
MAF VAZ 1117-19 Kalina, 2170-72 Priora, LADA 4x4 (21214, 2131) with electronic accelerator pedal Pekar In stock (5)2,500 RUR + 75 towards bonus account Absolute pressure and temperature sensor VAZ-1118,2170 ,2190, Vesta (door 21127)Characteristics
| Supplier code: | 472383 |
| Vendor code: | 21800-1413010-00 |
| Manufacturer: | ITELMA NPO LLC |
Absolute pressure and temperature sensor VAZ-1118,2170,2190, Vesta (engine 21127) Out of stock 1,955 RUR + 58.65 to the bonus account MAF VAZ-2110-15,2121 (engine 1,7), 2111 s.o. BOSCH injectorCharacteristics
| Supplier code: | 030533 |
| Vendor code: | 0280218004 |
| Manufacturer: | BOSCH |
DMRV VAZ-2110-15.2121 (engine 1.7), 2111 s.o. BOSCH injector Out of stock 5,220 RUR + 156.6 to the bonus account MAF VAZ-2113-15,1118-19,2170 (doors 1.6 8 cells) Euro 4 Characteristics
| Supplier code: | 598979 |
| Vendor code: | 11180-1130010-00 |
DMRV VAZ-2113-15,1118-19,2170 (doors 1.6 8 cells) Euro 4 Out of stock RUB 8,770 + 263.1 to bonus account
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Technical characteristics of DMRV VAZ 2114, 2113, 2115 models 21083-1130010-01
DMRV 2114, 2113, 2115 model 21083-1130010-01 has the following technical characteristics:
- Measuring range of mass air flow - from 8 to 550 kg/h;
- The error in measuring the air flow of the new VAZ 2114 air flow sensor is +/- 2.5%;
- The magnitude of the output signal when measuring the flow range from 0 to 100% is from 0.05 to 5 V;
- The sensor is powered from the vehicle's on-board network with a rated voltage of 12 V;
- The supply voltage range is from 7.5 to 16 V;
- Current consumption (at supply voltage from 7.5 to 16 V) - 0.5 A;
- Operating temperature range - from -45 degrees. up to +120 degrees. WITH;
- MTBF, no less than 3000 hours;
- Weight (gross): 0.3 kg;
- Overall dimensions of the package: 135x125x113 mm.
Mass air flow sensor
Mass air flow sensor is one of the most expensive sensors in a car. It is responsible for counting the air passing through it. These readings are necessary for proper mixing of air and fuel. The flow meter can fail if the air filter is not replaced for a long time, as well as with strong ventilation of crankcase gases due to the high content of oil combustion products in the internal combustion engine. It is located on the air filter housing and is attached to it with two bolts.
Signs of malfunction:
- Uneven idle speed;
- Increased fuel consumption;
- Long start of the internal combustion engine;
Idle speed control
A sensor that keeps the engine idling. It is a DC motor with a worm gear; there is a metal wedge on the shaft, which, if necessary, opens or closes the air channels of the throttle assembly. Installed on the throttle valve, secured with two screws to the body. Quite often it fails due to contamination of the shaft or aging of the sealing ring.
Signs of malfunction:
- Uneven idle speed;
- Long start of the internal combustion engine;
- Spontaneous engine stop;
The principle of operation of the DMRV sensor VAZ 2114, 2113, 2115
DMRV 2114, 2113, 2115 (hot-wire sample) contains a sensing part, a thin mesh (diaphragm) based on silicon, placed in the flow of incoming air. On the grid there is a heated resistor and two thermal sensors located in front of the heated resistor and after it.
The operating principle of the DMRV consists of different readings from two temperature sensors, one of which is located in front of the heating resistor, and three behind it. The heating resistor itself is located on a thin mesh (membrane) based on silicon, mounted in the flow of air passing through the air flow sensor of the VAZ 2114, 2113, 2115 hatchback model 21083-1130010. While the engine is running, the passing air flow cools the part of the mesh located in front of the heating resistor. This causes the heating sensor located in front of the heating resistor to cool down. And the temperature sensor located behind the heating resistor remains warm due to the heated air flow. The differential pulse of these two temperature sensors makes it possible to develop a characteristic curve depending on the size of the air passed through the mass air flow sensor. The pulse created by the air measurement sensor is analog. The MAF signal is a direct current voltage varying in the range from 1 to 5 V. Its size depends on the amount of air passing through it. The ECU, having received a signal from the DMRV VAZ 2114, 2113, 2115, model .21083-1130010, using its data tables, calculates the duration of the opening time of the fuel injectors. The duration of the fuel injector opening pulse corresponds to the parameters of high air consumption
Important ! Various diagrams of the VAZ 2114 car
Fuel level sensor
Indicates the remaining amount of fuel in the tank. Installed directly in the tank on the fuel pump glass. It fails when the graphite contacts on the electrical board are rubbed. When replacing, you should pay attention to its type number, which is indicated on the board, since all types of FLS have different resistance. If an unsuitable sensor is installed, large errors in readings may occur.
Signs of malfunction:
- Incorrect readings about the presence of fuel in the tank;
