Idle speed regulator VAZ 2110: breakdown and diagnostics

From this article you will find out what the VAZ 2110 idle speed regulator is. It is a device that allows to control the internal combustion engine with the help of a microcontroller unit. Of course, this element can break. Therefore, it is necessary to carefully study its device, as well as methods of conducting diagnostics. Please note that if the PXX fails, the engine will not be able to function properly. But it's worth telling about all the details in more detail.

General information

The idle speed regulator allows you to change the air supply to the fuel rail. In fact, it is a stepper motor, which is controlled by a special microprocessor-based electronic unit. Please note that it is incorrect to call this device a "sensor". It is an electric motor, and consequently, it performs the functions of an actuator. With it, the internal combustion engine is adjusted at idle speed. It is worth noting that it is difficult to detect the failure of the regulator. This can only be done if you have diagnostic equipment. You can also use the exclusion method. To do this, you must install a known good controller. Of course, the cost of such a diagnosis is very high. It is also worth noting that the self-diagnostic system does not detect a malfunction during the operation of the RXX. Therefore, the "Check Engine" warning light will not light up if the regulator fails. And only the replacement of the idle speed regulator will help .

What does РХХ do?

As it was mentioned above, the regulator allows changing the air supply. If you are familiar with the fuel system of the car VAZ 2110, then you know that in it the mixture is formed in the ramp. There is maintained a certain pressure, which is sufficient for a high-quality injection of the gasoline mixture into the combustion chambers. It is quite difficult to adjust the air. Especially with the throttle fully closed. Please note that it is with the help of the idle speed regulator VAZ that the engine is warmed up to the operating temperature. After all, in the injector motors there is no "suction" lever. Consequently, the air supply is adjusted by means of only PXX. This is exactly what the VAZ 2110 idle speed regulator does. It does not work while driving.

How does the controller work?

When the ignition is switched on, the rod moves on the idle speed regulator. It is put forward to the end. In doing so, it rests against a special hole in the throttle assembly. Then the rod returns to its original position. In this case, the regulator is calibrated. When the engine is running, decreasing or increasing the number of steps of the regulator causes a change in the volume of air that passes through this calibration hole. At the same time, the amount of air supplied to the fuel ramp at which the normal engine operation at XX can be carried out. Thus, the idle speed regulator VAZ 2110 and any other car. Very small size for this device, it can easily fit on the palm of your hand. There are three main elements in it. Firstly, it is a stepper motor. Secondly, it is a rod on which there is a needle in the form of a cone. Third, it is a spring that allows the piece to return to its original position. Fastening of the device is carried out by means of two bolts.

Symptoms of breakage РХХ

It should be noted that the VAZ 2114 idle speed regulator is similar in principle to all devices of this type. Of course, there will be a lot of trouble if suddenly the idle speed controller fails or starts to work incorrectly. You can note such symptoms as spontaneous change in the number of revolutions of the crankshaft. For example, suddenly there is a set of turns or a fall. If you start a cold engine, and thus do not increase the speed, then you can judge that the RXH was out of order. Also it is worth paying attention to the fact that when turning on the headlights or the stove, do not decrease idle turns. Also, often the motor stops if you turn off the transmission. For example, when changing from one transmission to another or stopping.

Diagnostics of PXX

To check the idle speed regulator VAZ 2110, you will need to prepare the car for repair. The first thing to do is to disconnect the terminal block with which the regulator is connected to the power supply system. After this, it is necessary to check if there is voltage. In the shoe, there are two wires, on which voltage must be present. Of course, do this with the ignition on. If the voltage is too low, then the reason is more likely to be in charging the battery. If there is no voltage at all, then search for a malfunction in the electronic control unit or in the power circuit of the idle speed regulator. Further, it is necessary to check the resistance between the terminals of the regulator itself. On average, this resistance should be 53 ohms. Then you can dismantle the sensor, connect it to the terminal block, and then apply power. In this case, the needle in the form of a cone should gradually move forward, and after reaching the extreme position, it must return to its original position. On the car VAZ 2115 the idle speed regulator is diagnosed similarly.