VAZ 2115 sensors: their features and purpose

Russian-made cars today are equipped with a variety of electronic devices that allow for the normal operation of many components and assemblies. In this article we will talk about the controllers and regulators that are on the VAZ. Where are the sensors located on the VAZ 2115, what is the purpose of their purpose, what malfunctions can occur in the operation of devices - read below.

Camshaft position (phase sensor)

DPRV or a phase sensor are equipped with all engines with an injector for 16 valves, as well as 8-valve carburetor engines with a phased injection of a combustible mixture.

The regulator sends information about the engine operation cycle to the control unit:

• which valve is currently open;
• what is the gas distribution phase.

According to the data received, the on-board computer calculates the timing of gasoline injection so that fuel is supplied before the intake valve is opened. As a rule, VAZ sensors are located in the engine compartment and the DPRV is no exception, it is located next to the cylinder head and the air filter.

DTOZH

The coolant temperature regulator or DTOZH is located on the thermostat, its function is to control the temperature level of the power unit. As practice shows, usually such controllers are characterized by reliability and a high service life, since, in fact, it performs only one function. , having received a signal from the DTOZH, it adjusts the engine speed, as well as the ratio of fuel and air to form a combustible mixture.

The main symptoms of a regulator failure are incorrect data on the heating of the internal combustion engine or the power unit starts to overheat due to being inoperative. If the system shows signs of failure, the part must be replaced as soon as possible.

Detonations

8- and 16-valve engines are also equipped. This element is located on the BC head, between cylinders 2 and 3. It can be seen if you look at the unit from the fan side. The readings of this device determine the ignition timing. Therefore, if errors appear in the system or signs of a controller malfunction are noticed, the device must be changed.

Oxygen

The oxygen regulator is popularly referred to as a lambda probe. This controller is designed to transmit data to the computer about how much oxygen is contained in the exhaust gases. The element is located in the silencer intake line, next to the resonator device. In the event of a breakdown, the auto regulator will begin to twitch while driving, so if signs of a malfunction appear, the device must be changed.

Crankshaft positions

It is an element that allows you to transmit signals to the on-board computer about the position of the crankshaft. The performance of the combustible mixture supply systems, as well as the ignition system, depends on how this element works. And if we are talking about the injector, then the DPKV determines the functionality of the injectors.

Often this element is called the timing regulator, since the control unit, having received data from it, detects the necessary moment for the injection of gasoline into the engine cylinders. In the event that the device breaks down, the on-board computer will begin to transmit incorrect data, which will subsequently lead to malfunctions in the gasoline supply system. Accordingly, the normal operation of the injectors will be impossible. The regulator itself is located next to the camshaft and the belt of the generator mechanism.

Throttle positions

The throttle position sensor (abbreviated as TPS) is one of the main components that ensures the normal operation of the fuel system. From the name, you can guess that the VAZ throttle controller transmits data to the on-board computer about the angle at which the throttle is currently located. In more detail, the symptoms of a breakdown and the process of replacing the device are described in the video (author - Ivan Vasilyevich).

The pulse frequency is one of the key characteristics of the throttle sensor. Given the changes in this parameter, the ECU by the motor detects the desired degree of pressure on the accelerator. Ultimately, the on-board computer selects the most optimal cooling mode for the power unit, as well as the amount of gasoline supplied. Since the controller itself is part of the throttle, it is located on the body of this assembly, not far from the idle speed controller.

Speeds

Machine speed signals are transmitted to the control unit using pulse signals. As a rule, for one kilometer traveled by a car, the device transmits about 6 thousand impulses. The speed of the machine is determined by the on-board computer, taking into account the purity of the pulses. Ultimately, the data obtained is used to adjust the speed of the power unit when idling. When the device fails, it leads to an increase in fuel consumption, especially when driving at idle. In this case, the engine power will be reduced, and the speedometer will also refuse to work.

Idle move

As you can already understand, almost all controllers on the VAZ 2115 are designed to read information. But the idle speed controller not only transmits data, but is also a regulatory element that somehow affects the operation of the power unit in idle mode. You can learn more about diagnosing device malfunctions, as well as replacing it, in the video below (the author of the video is Ivan Vasilyevich).

DHX is equipped with an electric drive, as well as a special conical needle installed in such a way that it enters the throttle line. When the car is idling or standing still, the regulator changes the position of this needle, according to which the line opens or closes. Ultimately, the air that enters the throttle assembly is also adjusted. There is a special place in the throttle to install the controller, so it can be easily found if necessary - the device is attached to the line with two bolts.

mass air flow

This sensor, like most others, transmits data to the engine control unit. Thanks to this information, the on-board computer adjusts the most optimal ratio of fuel and air volumes for the formation of a combustible mixture. Subsequently, this mixture is fed to the motor injectors. If this element does not work correctly or with errors, then the combustible mixture will ultimately not be able to match the parameters of the mode of operation of the power unit. Accordingly, in the end, this can lead to a decrease in engine traction, as well as a deterioration in the dynamics of the vehicle as a whole.

In addition, the failure of the DMRV is fraught with an increase in fuel consumption. As for the installation location, the device is located on the air filter element line, not far from the large intake line. If malfunctions are detected, the controller does not have to be changed - you can try to clean it yourself.