Malfunctions of the throttle sensor lead to unstable operation of the car engine. That the TPS is not working correctly can be understood by the following signs: unstable idle, decreased car dynamics, increased fuel consumption and other similar troubles. The main sign that the throttle position sensor is faulty is jumping speed. And the main reason for this is wear on the contact tracks of the throttle valve sensor. However, there are a number of others.
Checking the throttle position sensor is quite simple, and even a novice car enthusiast can do it. To do this, you only need an electronic multimeter capable of measuring DC voltage. If a sensor fails, repairing it is most often impossible, and the device is simply replaced with a new one.
Throttle position sensor VAZ 2112-1148200
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- Description
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APPLICABILITY: VAZ 2104i, 2105i, 2106i, 2107i, VAZ 2108i, 2109i, 21099i, VAZ 2110i, 2111i, 2112, VAZ 2113, 2114, 2115i, VAZ 1117, 1118, 1119 (Lada-Kalina), VAZ 2170, 2171, 2172 (Lada-Priora), VAZ 21214, 2131i (Niva), VAZ 2123 (Niva-Chevrolet, CHEVROLET NIVA).
The sensor produced by Rikor Electronics OJSC is designed for installation on the throttle body of the fuel injection systems of VAZ in order to convert the angular position of the throttle valve into a proportional change in electrical voltage, and is used by the on-board computer to control the fuel supply.
Specifications.
Operating temperature range: from -40°C to +125°C.
Return torque: 0.05 - 0.12 Nm (500 - 1200 Gcm ).
Wear resistance, operating cycles: 2,000,000.
Impact of mechanical factors (sinusoidal vibration): frequency range 20 - 2000 Hz, acceleration amplitude 200 m/s2 .
Impact of mechanical factors (repeated mechanical shock): peak impact acceleration 300 m/s2, nonlinearity in the working area from the calculated value of the current voltage + 3.5. -2%.
Cleaning
So, the part has been removed. Now you need to assess the condition of the gasket. If cleaning is being done for the first time, the gasket should be replaced. Cleaning is carried out using a pre-prepared product, cotton swabs and a toothbrush. We need to clean all cavities, hidden channels
The damper itself and the landing sites must be given special attention
As a result, the remote control must be completely cleaned of grease and dust. Before installation, it is worth cleaning the crankcase ventilation duct. Here you will need a foot pump. It is better to perform purging with the same product.
The photo clearly shows what a cleaned unit should look like.
Changing the sensor
- The car's service manual contains instructions that will help you determine the location of the sensor; you can watch a video on this topic.
- Replacing the VAZ 2112 throttle position sensor is a fairly simple procedure that any beginner can understand. So: turn off the ignition and disconnect the wire from the negative terminal of the battery.
- Then, by squeezing the plastic latch, we disconnect the entire block with wires from the sensor. To remove the TPS from the pipe, you just need to unscrew two bolts with a Phillips screwdriver. They are shown by arrows in the photo.
Sensor without pipe
- A foam rubber ring is used as a seal between the throttle pipe and the sensor itself, which is included in the kit of the device and must be replaced. When reinstalling the new TPS, the fastening screws are tightened as much as possible until the ring is completely compressed.
Sealing foam ring
Having installed the sensor in its rightful place, connect the block of wires. The device does not require any adjustment, so the replacement of the VAZ 2110 throttle position sensor is complete. The whole job took you no more than ten minutes.
Signs of a malfunction of the TPS
If the VAZ 2110 DPS is broken, the following signs of its breakdown appear on the car:
- Increased speed XX;
- Spontaneous increase in speed when starting up to 2500 rpm;
- The car stalls on its own when you release the gas pedal;
- Fuel consumption increases;
- Engine power is lost;
- Starting the engine becomes more difficult;
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.
Sensors connected to the ECU
Let's list all the elements one by one:
- 15 – DTOZH. A resistor screwed into the thermostat housing. The temperature of the antifreeze is determined;
- 17 – DPRV, also known as DF (phase sensor). The operating principle is the Hall effect. The position of the camshaft is controlled. Check it out here.;
- 20 – TPS. Resistor fixed to the throttle assembly 19. The angle of deflection of the throttle valve is measured;
- 21 – Mass air flow sensor. Sensor connected to the filter housing. Controls air flow; the main signs of its malfunction are discussed here;
- 22 – IAC. Not a sensor, but a regulator (electromagnet). Used in idle mode. About its testing and diagnostics here. About replacing the IAC here.;
- 24 – lambda probe or oxygen sensor (see above);
- 25 – speed sensor. Fixed in the gearbox slot. Operating principle – Hall effect;
- 26 – DPKV. Electromagnetic sensor. The position of the crankshaft is controlled;
- 27 – DD (knock sensor). A piezoelectric element mounted on the outer wall of the cylinder block.
Let's take a look at how all the elements look in real life. Shown are pictures of VAZ-2112 sensors (16-valve internal combustion engine).
Each element will be easy to find under the hood
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.
Examination
The sensor can be checked using a multimeter or a diagnostic scanner. Since not all car enthusiasts have a scanner, and almost everyone has a multimeter, we will give an example of diagnostics using a multimeter.
The check must be carried out with the ignition on. To carry out diagnostics, you will need two sewing needles or pins.
- Insert the needles into the connector contacts
- We set the DC voltage measurement limit on the multimeter to 20V.
- We connect the multimeter probes to the needles.
- The readings on the device should be within almost 6 Volts. If the readings are lower or absent at all, then the sensor is faulty.
- Next you need to check the integrity of the resistor. To do this, turn the throttle valve by hand, the readings on the multimeter should decrease and, with the throttle fully open, should be approximately 4.5 Volts.
If the readings fluctuate or disappear, it means the sensor is faulty and requires replacement.
Description and features of replacing sensors
Where are all the sensors on the VAZ 2112 16 valves located and what are they responsible for? The location of the sensors, as well as their purpose, are described below. The entire list of controllers includes many devices, but we will not describe all VAZ sensors, but will pay attention only to the most basic ones.
Throttle Positions
The VAZ throttle position sensor reads readings in accordance with the position of the gas pedal. The TPS is located on the throttle body and is connected to the throttle axis mechanically. This device itself is a resistor device of a potentiometric type - one terminal of the TPS is intended for connection to the on-board network, and the second is connected to ground. The third pin is connected to the controller, which, in turn, determines the position of the damper based on readings from other regulators.
Failure of the regulators can occur either as a result of wear or after washing the engine if it is damaged. To replace them, you only need to disconnect the device from the power supply and unscrew the bolts that secure the VAZ throttle sensor. When installing, you must connect the contacts correctly.
Speeds
The VAZ speed sensor is designed to inform the motorist about how fast the car is moving. The quality of these devices in general is average; their breakdown leads to a deterioration in the dynamics of the vehicle. These devices are mounted in the slot of the gearbox; their operating principle is based on the Hall effect.
Designation of contacts for connecting DS
The regulator receives a 12-volt signal from the controller. The device transmits a signal of a certain frequency to it, which depends on the speed of the car. In addition, the device is also involved in controlling the injection system. To replace the DC, you first need to disconnect it from the power supply and then unscrew it from the installation location using a wrench. As you can see, there is nothing complicated about this.
To understand that the speed controller needs to be replaced, you just need to monitor the operation of the engine - usually the symptoms speak for themselves:
- The speed of the power unit began to fluctuate, especially when driving in neutral gear or while the car was parked. In some cases, the engine may randomly shut down if the driver does not press the gas pedal.
- The main symptom is that the speedometer does not show the speed of the car. The arrow may not rise at all, or it rises and falls; in general, it generally does not work correctly.
- Another sign by which a breakdown can be determined is an increase in gasoline consumption. Of course, such a symptom can indicate various malfunctions in the engine, but if the speed fluctuates and the speed is displayed incorrectly, then you should think about replacing the engine.
- Engine power has generally decreased.
Crankshaft
The VAZ crankshaft position controller consists of a winding as well as a magnetized core. DPKV is an induction type device, its purpose is to monitor the passage of 60 crankshaft teeth past the core, all of these teeth are spaced 6 degrees apart. It should be noted that their number on the shaft is not complete - two teeth are missing, resulting in a slight gap. It is at the moment when the crankshaft position sensor detects the absence of teeth, it generates a special signal that is transmitted to the control unit (the author of the video about starting the engine with a faulty DPKV is the Avtoelektika HF channel).
Device
1 - Shaft;
2 - Housing; 3 - Connector; 4 - Contacts; 5 - Resistor; 6 - Ring; 7 — Spring stopper; 8 - Spring; 9 - Cover; This component of the system is a fairly simple electrical resistor, which changes the resistance when the axis is rotated.
The sensor is located on the damper shaft and, when it opens, performs the function of turning together with the damper. Due to the fact that the design is quite primitive and unreliable, the sensor often fails, resulting in certain problems with the formation of the fuel mixture. So, in most cases, the problem is the rubbing of the tracks, but the possibility of other problems with the condition of the resistor cannot be ruled out.
