The air consumption sensor (DMRV) is designed to determine the amount of air that goes on filling the cylinders during the operation of the motor. This sensor is mounted after a air filter in the intake path and is one of the most basic injection system. However, unfortunately, such a device is able to fail, which is rather unpleasant. This article will tell about the most common signs of DMRV malfunction on VAZ 2110, as well as how to diagnose and phased sensor replacement.

Mass flow sensor, device, targets and tasks

In order for the engine to work in optimal mode, about 1 part of the fuel and 14 parts of the air should fall in one clock. If there is a violation of this relationship, either a fuel reservoir will arise or reduce the power of the motor.

DMRV is needed to measure the perfect number of air entered the engine. It is able to calculate the amount of air and send data to the main computer, which, based on this information, calculates the amount of the desired fuel.

The more the driver is taking a gas pedal, the more air flows into the motor. This records DMRV and gives the main computer to increase the amount of fuel. If the driver rises evenly, the air flow will be small, respectively, and the fuel consumption will also be optimal. All this controls the air flow sensor.

This device consists of a wire with a platinum with a diameter of 70 μm, which is installed in the measuring tube, which is located in front of the throttle. The work of DMRV is built on the principle of temperature unchanged.

During operation, the platinum DMRV wire is able to pollute. To prevent pollution, after turning off the motor, the wire for one second is heated to a temperature of 1000 degrees Celsius. At the same time, all the dirt burns on it burns. This process controls the electronic control unit.

The mass flow sensor is reliable and pretty easy to use. However, if he failed, then, as a rule, it is not subject to repair or recovery. The output from the situation is the complete replacement of the sensor to the new one. This is the main disadvantage of this device, since the new DMRV is expensive.

DMRV malfunctions, what signs will indicate the problems of DMRV

DMRV indicators play a significant role in the correct formation of the air-fuel mixture. Therefore, his breakdown is able to lead to failures in the installation of installation, and sometimes, and to the impossibility of starting the engine.

There are several signs that signal about the output of the sensor:

1. Floating speed at idle.
2. Increase the consumption of fuel.
3. The inability to start the motor or launched.
4. Reduced power.
5. Drop speed dynamics.
6. Safety lamps "Check Engine".

It is worth noting that such signs indicate not only the breakage of this sensor, the reasons may be set. That is why it is necessary to determine whether the "Barrachlit" is really a DMRV.

How to check the air consumption sensor, step-by-step instruction

There are a number of methods with which you can identify the failure of the DMRV. The simplest method is shutdown from the power chip sensor on the started engine. When the chip is disabled, the control unit automatically goes into an emergency mode, a fuel dosage at which is carried out on the basis of the indications of the throttle position sensor. In this case, the turnover in idle mode will increase over 1500 revolutions, but not necessarily, in some injection systems, the increase in revolutions does not occur.

When the flow meter is disconnected on the vehicle. If the power plant began to work much better, most likely the problem in DMRV.

On some sensors, you can check using a multimeter or a voltmeter with a high accuracy of settings. The positive probe of the measuring device must be connected to the sensor signal wire (as a rule, the right extreme wire), and the minus - to the grounding of the DMRV. Next, you should turn on the ignition, but do not start the power installation. A serviceable sensor has a voltage from 0.9 for 1.4 V. The data above indicate a malfunction of DMRV.

The visual inspection is also capable of pointing to the breakdown, since, often, the fault is to pollute the working components of the sensor.

If strong pollution is visible on the operating components of the sensor, most likely it is precisely this is the cause of problems in the operation of the power plant. With DMRV, restoration work can be carried out only on the basis of the Pito tube. Dirt can be removed by flushing with an aerosol for cleaning the carburetor.

Replacement of DMRV do it yourself, step-by-step instructions

Work on the replacement of DMRV should be carried out when the ignition is turned off.

1. First of all, you need to disconnect the chip from the sensor with the wires that go to DMRV.
2. Next, it is necessary to remove the inlet pipe from the filter, for which you should send fastening clamps.
3. Then required with the key for ten unscrewing two bolts that fasten this sensor.
4. After that, remove the DMRV from the landing site.
5. Before installing a new sensor, check the density of the sealing ring, otherwise, with an insufficient density, there is a probability of air supply, and an external, not purified from impurities, which may well be the cause of the rapid sensor breakage.
   
6. When you checked the seal, we put the sensor in place and fix the bolts.
7. Then we put the nozzle into place and connect the chip with the wires.
8. At the final stage, we check the restoration of the optimal operation of the power plant.

Tips of professionals

It is worth noting that when buying a new DMRV, it is desirable to choose it in the code, which is located on the old sensor. In addition, when installing DMRV, it should be extremely neat, the sensor needs to be mounted without hurry, so that the rubber ring is not fluffed. More useful information you will learn from the next video.