All VAZ 2110 sensors: what should an experienced Tens owner know?

Author: Ivan Baranov

Any modern car is equipped with many different sensors that allow the driver to know about the condition and performance of certain components. And the VAZ 2110 car is no exception; in this article we will talk about what sensors are used in it and what their location is.

As you know, the VAZ 2110 injector with 8 or 16 valves is significantly superior to the carburetor version in many ways. At least because in this case the supply of gasoline, as well as the combustible mixture, is regulated by electronics. Accordingly, the use of electronics implies the use of many different regulators and controllers. Their breakdown can lead to certain consequences, so the car owner should always know what certain regulators are responsible for. Below we consider almost all VAZ sensors that are in the top ten.

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A little history

The VAZ 2110 was produced from the end of the 20th century until the middle of the first decade of the 21st century. During its existence, the top ten managed to gain a huge number of fans and underwent a large number of changes.

The tenth VAZ family was initially equipped with 8-valve carburetor engines that had common roots from the G8 engines. Time moved forward and AvtoVAZ needed to develop further, and at the end of the 90s, an injection engine was installed on the top ten for the first time, which was distinguished not only by a new injection system, but also by the number of valves; some new engines received a doubled number of valves from 8- mi to 16.

To operate an engine with an injection system, you need a huge number of different sensors responsible for the operation of the internal combustion engine, and the VAZ 2110 is no exception; the dozens of injection engines have many different sensors installed that ensure correct and smooth operation of the engine.

In this article we will talk about VAZ 2110-12 sensors, their symptoms of malfunction and installation locations.

Principle of operation

The mechanism of action of the temperature sensor on the VAZ 2110–2112 family is based on changing resistance parameters depending on the ambient temperature t°C. In essence, we have before us an electronic resistor with a negative temperature coefficient. That is, the lower the t°C, the higher the resistance of the device, and vice versa.

Table 1. Operating temperatures and parameters of DTOZH

The presented values ​​can be used to check the sensor with a tester. More on this below.

What function does DTOZH perform in the ECU system?

There is no damper (choke) on injection machines. Now the fuel is enriched or leaned by the control unit using the t°C values ​​coming from the DTOZH. In addition, the main controller monitors the operating temperature of the engine and gives a command to turn on the fan if it overheats.

Mass air flow sensor (MAF)

It is one of the most important sensors. The mass air flow sensor is responsible for the formation of the air-fuel mixture. It measures the volume of air supplied to the intake receiver and transmits the readings to the electronic engine control unit, which in turn supplies the right amount of fuel in relation to air. The failure of this sensor affects many different functions of the internal combustion engine.

It should be noted that the “CheckEngine” lamp will light up only if the sensor fails completely. Most often, the sensor undergoes aging, but very rarely fails completely. You can read how to check this sensor in our article.

Signs of malfunction:

• Increased fuel consumption;
• Uneven idle speed;
• Difficulty starting the internal combustion engine;
• Loss of dynamics;
• Jerks when moving;

Main set of sensors for 16-valve VAZ-2112 engines

The ECU must control many parameters at once. The most important information will be the position of the crankshaft. You can turn off all sensors except the DPKV, and this will not lead to the engine stopping. Let's list all the elements one by one: Let's look at how all the elements look in real life. Shown are pictures of VAZ-2112 sensors (16-valve internal combustion engine). Everything said above is true for two engines at once - for units 21124 and 21120 (1.6 and 1.5 l). You cannot unscrew the DTOZH sensor without draining the coolant. And to disconnect the sensor means to disconnect the connector, but not to dismantle the sensor itself.

Where is which sensor located - engine compartment diagram

Let's look at another picture. It is important to understand where the following elements are located:

1. DPKV;
2. Lambda probe;
3. Speed ​​sensor;
4. RXX;
5. TPDZ;
6. DMRV;
7. DTOZH.

The location of the phase sensor is indicated in the previous chapter. Never unscrew the speed sensor. It will be difficult to install it in a way that maintains a seal.

Speed ​​sensor

This sensor is designed to transmit readings to the engine ECU about the speed of the vehicle. It is involved in adjusting the engine speed when driving, namely, if the car is rolling in neutral, you will notice that the speed is slightly higher than the idle speed when the car is standing still. The DS is also responsible for the performance of the speedometer and odometer.

Signs of malfunction:

• Inoperative speedometer or odometer;
• There are no increased speeds when driving in neutral gear;

Is the air flow sensor covered? Don't rush to buy a new one

A new sensor costs from 2 to 3.2 thousand rubles. But before we run to the nearest store or car market, let’s try to bring the old one back to life. This method of resuscitation does not provide a 100% guarantee of restoration of functionality. But it's worth a try.

First, disconnect the negative terminal on the battery. Remove the sensor from the vehicle. Remove it from the air filter housing. Disassemble the device using a Phillips screwdriver. Be careful with platinum threads, do not touch them with your hands or other objects. Clean with carburetor cleaner. Spray the liquid 3-4 times onto the areas indicated by arrows in the photo. Assemble the mass air flow sensor and install it on the car.

Accompanying photos to the process

If you are a little lucky and act carefully, you will be able to save a couple of thousand rubles.

In conclusion, I would like to note that a drop in power and an increase in fuel consumption do not always indicate a malfunction of the mass air flow sensor. But if such symptoms appear, check the air flow sensor first. Its initial diagnosis can be performed independently. An accurate check is carried out using special equipment at a service station. Be careful with your car - it will save your money and time.

Coolant temperature sensor (DTOZH)

The DTOZH is installed in the thermostat housing and transmits readings to the ECU about the temperature of the engine coolant. Based on these readings, the engine control unit increases or decreases engine speed for more stable operation of the internal combustion engine. The operation of this sensor is noticeable on a cold engine; when starting the engine in the cold season, you can notice increased speed, which decreases over time as the engine warms up to operating temperature.

Signs of malfunction:

• Increased fuel consumption;
• Poor starting on a cold engine;
• Lack of warm-up speeds;

Spare part selection

There are sensors on the market in three price categories:

1. Inexpensive. Typically these are Chinese-made sensors priced up to 1,200 rubles.
2. Average. This category includes sensors from AvtoVAZ and foreign analogues of approximately the same quality. Their price ranges from 1400 to 2600 rudders.
3. Expensive. High-quality and reliable mass air flow sensors from manufacturers Bosch or Siemens. Their price can reach 5,000 rubles.

We recommend giving preference to original sensors from AvtoVAZ or foreign analogues in this price category.

Crankshaft position sensor (CPS)

DPKV is a sensor that counts crankshaft revolutions. Just like most sensors, it participates in the formation of the fuel mixture. If it malfunctions, the car will not start.

The sensor is installed on the rear of the engine under the oil filter. Works in tandem with the crankshaft pulley (generator drive).

Signs of malfunction:

• The car does not start (no spark);
• Jerks when moving;
• Spontaneous engine stop;

Other control devices

The remaining sensors are also connected to the controller and perform important functions. Failure of any of them leads to an increase in fuel consumption, loss of acceleration dynamics or unstable operation of the power unit. Here is their list:

• throttle position detector;
• knock sensor;
• speed meter;
• oxygen sensor;
• phase detector.

The element that determines the angle of rotation of the throttle valve is installed on its body and is directly connected to the axis. The task is to facilitate the supply of excess fuel to the cylinders when the accelerator pedal is pressed sharply. The principle of operation is similar to the accelerator pump in a carburetor, only of the electronic type. The device often fails, especially after washing the engine.

The knock sensor located on the front side of the cylinder block functions much more reliably. Unlike other devices, it generates a signal independently, acting on the principle of a piezoelectric element. The stronger the detonation flashes in the cylinders, the more voltage is supplied to the controller, and it regulates the ignition angle, trying to extinguish detonation. If necessary, change with a wrench.

The oxygen sensor (otherwise known as a lambda probe) monitors the content of free oxygen in the exhaust gases, indicating that the fuel mixture is enriched or lean. Participates in the formation of this mixture and is very reliable in operation. It is afraid of leaded fuel and quickly breaks down when used. It is located in the first part of the exhaust tract, at the convergence of the exhaust manifolds.

The speed meter also works on the principle of a Hall sensor and takes readings from the speedometer drive shaft located near the gearbox. The task is to transmit information about the speed of the car to the processor.

Additional information about the operation of the timing belt is transmitted to the controller by a device that determines the phases. It is installed on VAZ-2112 cars with 16 valves in the upper part of the cylinder head. This device tells you when the fuel valves are opening by monitoring the position of the intake camshaft. This helps to synchronize the complex process of gas distribution and injection of the fuel mixture at the right time.

Phase sensor (PF)

This sensor is necessary for counting camshaft revolutions; its functions are similar to those of the DPKV. Designed for phased fuel injection; without this sensor, the internal combustion engine will operate in emergency mode and the fuel supply will switch to pairwise mode.

It is installed under the timing cover on 16-valve engines, and on 8-valve engines on the end of the cylinder head on top of the thermostat.

Signs of malfunction:

• Increased fuel consumption;
• Unstable work at XX;
• Loss of dynamics;

Idle air control (IAC)

This sensor is installed on the throttle valve and regulates the air supply when the car is running at idle. In other operating modes of the internal combustion engine, the idle air regulator is not involved. The sensor performs mechanical functions, so if it malfunctions, the “CheckEngine” warning light does not light up.

If the regulator breaks down, you can wash it and try installing it again. If washing does not help, the sensor must be replaced with a new one.

Signs of malfunction:

• Unstable idle;
• The engine stalls when coasting;
• Difficulty starting the engine;
• Low speed XX;

Throttle Position Sensor (TPS)

TPS is designed to transmit indications about the position of the valve in the throttle assembly. The received readings are transmitted to the ECU for further regulation of the fuel mixture. This sensor fails quite often. Located on the throttle valve above the IAC.

The sensor cannot be repaired and if it breaks, it is replaced with a new one.

Signs of malfunction:

• Spontaneous increase and decrease in speed;
• Difficulty starting the engine;
• Increased fuel consumption;
• Low speed XX;

Oil pressure sensor (OP)

This sensor signals the condition of the oil pressure in the engine. When it decreases, a lamp on the car’s dashboard lights up in the form of a red oil can. The sensor is completely mechanical and is only responsible for turning on the low oil pressure indicator.

Signs of malfunction:

• The oil pressure lamp does not light up;
• The oil pressure lamp is constantly on;

Oxygen sensor (OS)

The VAZ 2110 oxygen sensor is installed in the exhaust manifold. The DC measures the exhaust gases and uses their readings to determine the ratio in which the fuel mixture is formed. If the readings exceed the permissible values, the ECU adjusts the air-fuel mixture in such an amount that the exhaust gases do not exceed the permissible values.

Signs of malfunction:

• Increased fuel consumption;
• Loss of vehicle dynamics;
• Black smoke when driving at high speeds;