Crankshaft position sensor VAZ 2108 injector 8 valves

The crankshaft position sensor (timing sensor) is one of several sensors in the electronic engine control system (ECM).

An inductive crankshaft position sensor (2112-3847010-04, 30.3847, 191-3837, etc.) is installed on the engine 2111 of fuel-injected VAZ 2108, 2109, 21099, 2113, 2114, 2115 cars. Purpose of DPKV

The crankshaft position sensor is designed to generate signals by which the controller (ECU) synchronizes its operation with the cycles of the working process in the engine: it determines the crankshaft rotation speed, the moment of fuel injection into the cylinders, and calculates the volume of injected fuel based on the rotation speed.

The crankshaft position sensor for injection engines of VAZ 2108, 2109, 21099 cars is an electromagnet (winding with a steel core inside) that generates an electromagnetic field.

The crankshaft position sensor is installed on the oil pump cover next to the ring gear of the generator drive pulley on the engine crankshaft. The gap between the sensor and the ring teeth is 0.8 – 1.2 mm. The crown has 60 teeth, two of which are cut off.

Operating principle of DPKV

The operation of the sensor is based on the principle of electromagnetic induction. When the engine crankshaft rotates, the teeth of its pulley pass through the electromagnetic field created by the sensor. This causes alternating current voltage pulses to appear in the sensor circuit. Based on their frequency, the controller determines the crankshaft rotation speed.

When a gap of two teeth passes past the sensor, a so-called reference signal is formed in the sensor circuit. Using it, the ECU determines that the pistons have passed the top dead center either in cylinders 1–4 or in cylinders 2–3 of the engine. And gives the command to inject fuel.

If the crankshaft position sensor fails on fuel-injected VAZ 2108, 2109, 21099 vehicles, it becomes impossible to start the engine. In some cases, there may be jerks and interruptions in engine operation when the vehicle is moving, difficult starting and unstable idling, detonation and misfiring. Read more: “Malfunctions of the crankshaft position sensor DPKV.”

Considering the reliability of the DPKV, you should first check the wiring going to it, the connecting block, the correct mounting on the engine, oiling and contamination, and the serviceability of the crankshaft pulley (rotation of the ring gear). Read more about the diagnostics of DPKV on the website “Checking DPKV injection engines VAZ 2108, 2109, 21099”. Notes and additions

— Electromagnetic induction – in this case, the occurrence of an electric current when a metal object enters the electromagnetic field of the sensor.

— After turning on the ignition, the controller (ECU) first interrogates the DPKV, receiving a synchronization pulse from it. Starting the engine and its stable operation is determined by the precise synchronization of pulses from the DPKV and the pulses that control the opening of the injectors and the ignition module.

Checking the crankshaft position sensor (CPS) ECM VAZ 21083, 21093, 21099

If the crankshaft position sensor (ECM) of VAZ 21083, 21093, 21099 cars fails, it will be almost impossible to start the engine.

This is the only sensor whose malfunction will prevent the entire injection engine control system from working, since it is from the signal from it that the control unit (ECU) determines the position of the crankshaft, rotation speed, and calculates the torque and amount of fuel injection.

Checking the crankshaft position sensor (CPS)

To check, you will need a voltmeter or other measuring device in voltmeter mode.

— We remove the DPKV from the engine.

— We connect a voltmeter to its terminals (with a measurement limit of up to 200 mV).

— Quickly bring a screwdriver blade or other metal object near the end of the sensor.

If the sensor is working properly, we observe voltage surges. If it is not working properly, there will be no voltage surges. We replace it with a new one.

Notes and additions

— Special attention should be paid to the gap between the end of the sensor and the teeth of the crankshaft pulley. It should be 1±0.41 mm. The gap is specified by design and is not adjustable, but may increase due to the presence of dirt in the place where the sensor is attached. In this case, the sensor may also not work. To ensure normal operation of the DPKV, dirt must be cleaned from underneath it.

Source

Crankshaft position sensor VAZ 21083, 21093, 21099

The crankshaft position sensor (timing sensor) is one of several sensors in the electronic engine control system (ECM).
An inductive crankshaft position sensor (2112-3847010-04, 30.3847, 191-3837, etc.) is installed on the engine 2111 of fuel-injected VAZ 21083, 21093, 21099, 2113, 2114, 2115 cars.

Crankshaft position sensor ECM VAZ 21083, 21093, 21099

Purpose of DPKV

DPKV device

The crankshaft position sensor ECM of the injection engine 2111 of VAZ 21083, 21093, 21099 cars is an electromagnet (winding with a steel core inside) that generates an electromagnetic field.

DPKV location

Operating principle of DPKV

DPKV malfunctions

If the crankshaft position sensor on a VAZ 21083, 21093, 21099 injector fails, it becomes impossible to start the engine. In some cases, there may be jerks and interruptions in engine operation when the vehicle is moving, difficult starting and unstable idling, detonation and misfiring. The Check Engine light comes on. Read more: “Malfunctions of the crankshaft position sensor DPKV.”

Considering the reliability of the DPKV, you should first check the wiring going to it, the connecting block, the correct mounting on the engine, oiling and contamination, and the serviceability of the crankshaft pulley (rotation of the ring gear). Read more about the diagnostics of the DPKV on the website “Checking the DPKV ECM of the injection engine 2111 VAZ 21083, 21093, 21099”.

Notes and additions

— Electromagnetic induction – in this case, the occurrence of an electric current when a metal object enters the electromagnetic field of the sensor.

Source

Malfunctions and diagnostics

From the described principle of operation it is clear that if it does not receive a reference signal from the DPKV or if it is distorted in the circuit, the controller will not issue commands to the injectors and spark plugs. Starting the engine and operating it with such a breakdown is impossible.

The design of the sensor itself is simple and reliable, so diagnosing problems should begin by checking the electrical circuits: the condition of the wires suitable for the part and their insulation, as well as the presence of a contact in the terminal block. The following symptoms may lead to troubleshooting:

The engine does not start immediately, but only after cranking the starter for a long time, especially in cold weather or in high humidity.
The power developed by the machine begins to drop after the engine has completely warmed up (10–15 minutes after starting).
The appearance of dips in dynamics that cannot be explained by the road situation or the quality of gasoline. The motor may suddenly lose power, then suddenly start working normally again. At the same time, the controller lights up the “Check Engine” error lamp, which goes out by itself, then lights up again.
The speed of the power unit floats spontaneously, and the idle speed is unstable.
Fuel consumption has increased noticeably.

Removing and installing the sensor

To diagnose and, if necessary, replace the sensor, you need to dismantle it. To understand where the part is located, look at the engine from the front.

They are oriented towards the fan belt on the right side of the windshield, where the ring gear is aligned coaxially with the pulley. The DPKV is mounted on the oil pump ebb bracket and is secured with one 10mm wrench bolt. Carefully disconnect the terminal block, unscrew the bolt with a wrench or a socket and remove the part.

Functionality check

An auto electrician working in an equipped workshop will be able to check the serviceability of the sensor using measuring equipment (multimeter or oscilloscope). The resistance of the winding of the part is considered to be within the range of 550–750 Ohms.

In field conditions, when devices are not available, experienced drivers check the serviceability of the DPKV using a “folk trick”:

The sensor is removed from the engine, reconnected to its connector and placed in a convenient place under the hood.
They open the car doors so that from the front they can hear the hum of the running gas pump.
Turn on the ignition.
A steel tool (wrench) is brought to the DPKV magnet, which is magnetized to the end of the part.
By sharply tearing the key away from the sensor with force, a current pulse is formed in its winding.
If the part is working properly, the controller will recognize the impulse and give a command to turn on the fuel pump, which will be heard by sound.

When a malfunction is detected, the sensor cannot be repaired and requires replacement. It’s better to always have a spare one, because its price is less than 300 rubles.

Crankshaft position sensor and its replacement

This material will be useful to all owners of VAZ 2109, 2108 and 21099 cars with injection engines, since it is on such models that a crankshaft position sensor is installed from the factory.

DPKV is the part that you should have in stock at any time. If you find yourself on the road due to the failure of this spare part, then you may not even start the engine, and the only way to get home is a tow truck or tow truck.

The price of a crankshaft sensor for a VAZ 2109 ranges from 300 to 500 rubles, depending on the type, part code and manufacturer.

Troubleshooting Methods

If there are problems with the crankshaft position controller, then there is only one way out. This is his replacement. It cannot be repaired. And there is no point in messing with it, since it is inexpensive.

Installation worker

You just need to take the working one and install it instead of the old one. If the engine starts and runs as it should without interruption and does not stall, then that is where the problem lies. Needs replacement. If not, and the car’s operation has not improved, then you need to look for a problem elsewhere.

Replacing DPKV with your own hands + video review

In order not to show everything on the fingers and not to explain the whole process once again, I made a detailed video review, which shows the procedure most clearly. Even a novice driver can figure it out, since there are no difficulties in it. The main thing is to have the following tool at hand:

head for 10
ratchet or wrench
small extension cord

Here is a review of how to replace the crankshaft position sensor on VAZ 2109, 21099, 2108

The review was written using the example of a 1.5 liter VAZ 2111 engine.

If, as a result of viewing, you still have any questions, you can ask them under the article in the comments. Or follow the link to the video and ask on the channel.

Source

How to replace the crankshaft position sensor on a VAZ 2108-VAZ 21099?

Removal: 1) First, de-energize the battery by disconnecting the “-” terminal from the battery itself. (Do you want to know in detail how to remove the “-” terminal? Then, in this case, for all the information on this matter, see the article: “Replacing the battery on a VAZ”, point “1”)

2) Next, holding the wire block with your hand, disconnect it from the crankshaft position sensor.

3) Then remove the single bolt that secures the crankshaft sensor to the bracket on the engine.

4) After you unscrew one single bolt, remove the crankshaft position sensor from the bracket.

Installation: 1) Installation occurs in the reverse order of removal.

Checking the functionality of the crankshaft position sensor:

1) First you will need to connect a “multi-meter” to the removed crankshaft position sensor. 2) And then check the crankshaft position sensor for resistance.

Note! If the crankshaft position sensor is fully operational, the “ohmmeter” should show you a result of “550-750” Ohms!

Source

How can I check the serviceability of the DPKV?

Nowadays, the most popular are 3 methods, which are carried out quickly and provide information about the performance of the sensor with high accuracy.

Diagnostics of the crankshaft position sensor with an ohmmeter

When measuring the resistance of a winding set on a sensor, you can use a special device - an ohmmeter (or in other words, a multimeter). When checking, the device should show a value in the range of 550-750 Ohms.

Testing process - the resistance of the coil in the inductive sensor is measured. If the coil on the sensor is damaged, then first of all the damage will be reflected in the resistance value. That is why, at the beginning of the diagnosis, the required range is set and the correct operation of the element is checked using probes.

Replacing DPKV with your own hands + video review

head for 10
ratchet or wrench
small extension cord

Here is a review of how to replace the crankshaft position sensor on VAZ 2109, 21099, 2108

The review was written using the example of a 1.5 liter VAZ 2111 engine.

If, as a result of viewing, you still have any questions, you can ask them under the article in the comments. Or follow the link to the video and ask on the channel.

The crankshaft position sensor (CPS) is necessary to synchronize the operation of the injection engine control system (ECM) with the position of its crankshaft.

— The car engine does not start

The sensor itself has failed, or its electrical circuit has been damaged. DPKV is the only sensor in the control system of an injection engine; if it fails, the engine will not start.

— The car engine starts with difficulty (starts and stalls)

— Unstable engine idling

— Dips, jerks when pressing the gas pedal

The causes of the malfunction (difficulty starting, unstable idling, dips and jerks) will be: loosening of the sensor, its contamination, the gap between the tip of the sensor and the ring gear does not correspond to the norm (1±0.2 mm for VAZ), damage to the ring gear of the generator drive pulley , no voltage supply to the sensor from the control unit (the sensor circuit is damaged).

If any of the listed signs of a malfunction of the DPKV appear, remove it and check the sensor itself and its electrical circuit. Read more: “Checking the crankshaft position sensor (CPS) of the ECM of VAZ 2108, 2109, 21099 cars.” A working sensor should produce a resistance of 500-700 Ohms.

Notes and additions

— When the DPKV fails, the “Check Engine” warning light in the instrument panel lights up.

— The crankshaft position sensor informs the system control unit (ECU) about the rotation speed and angular position of the crankshaft at the moment. Based on this information, the control unit adjusts the ignition timing. discharge force on the spark plugs, timing and duration of fuel injection by injectors.

Signs of breakdown

If the DC fails, the car itself will notify you that there is a fault. To determine problems with the diesel engine, there are certain signs coming from the engine:

You simply cannot start the engine;
There are interruptions in the operation of the power unit - the smooth running becomes not so smooth, jerks appear;
Idle speed is broken or completely absent;
The engine may suddenly turn off or stall;
Motor power is noticeably lost.

Before you run to the engine compartment and change the Hall sensor, first you need to make sure that it is the cause of all the troubles with the engine. Still, the signs are indirect, and they can be caused by a malfunction of other elements of your car.

Installation location

Checking status

There are several main methods that are used today to check the current state of the Hall sensor. Let's get to know each of them in more detail, and you decide for yourself which one you will use the next time you check the DH on your VAZ 2109.

https://youtube.com/watch?v=loxwayrjpVM

Verification method	Your actions
Replacing an old device with a new one	This is the simplest method, which will require you to have a spare Hall sensor on hand, of which you are confident that it will work. Simply remove the old sensor, insert the new one in its place and try to start the car. If everything works, you have found the reason. If not, you will have to look for the source of the problems in other systems.
Checking the output voltage	For this method, you will need a tester connected to the output of the device. If the Hall sensor is working properly, the tester will show values in the range of 0.4-11 Volts. If the data does not meet the established standards, the household will have to be replaced
Simulation of device operation	A popular method in which you deceive your own car by simulating the operation of the Hall sensor. You need to remove the plug block, turn on the ignition and connect outputs 3 and 6 together. If a spark starts to jump, you can be sure that your sensor has failed.
Checking without additional devices	Here you don't need a tester or voltmeter. First, connect the lead from the coil to the spark plug, and connect the thread of the spark plug to ground. Remove the carriage with the sensor and attach the connector. Now you can turn on the ignition. Using a screwdriver, move the tool near the device - the Hall sensor. If a spark appears on the spark plug, this indicates the serviceability of the DH. If not, the conclusion is obvious.

Device check

If you discover that the DC is faulty, you should definitely replace the device. We do not recommend delaying this event.

Sensors VAZ 2109 carburetor

Modern cars have a microcontroller to control the operation of all vehicle systems. In order for the microcontroller to receive information from various vehicle components, a large number of different sensors are installed on them. One sensor indicates the temperature in the cabin, another is responsible for exhaust toxicity, the third monitors the position of the headlights, the fourth determines whether the driver is sitting in the seat or not, and so on. It gets to the point of insanity: the low beam light on the car burns out, but it won’t start. The controller throws an error, which is also not so easy to decipher. This is understandable - this is the bread and butter of automaker service centers. In this regard, the old VAZ 2109 looks very attractive: they have very little electronics. Yes, and that one is very primitive. The coolant temperature sensor has failed - no problem, the generator does not work - also a problem, drive until the battery runs out. For modern foreign cars this is impossible: the controller will see a malfunction, prohibit the engine from operating and will require the driver to eliminate the malfunction. Compared to the injection model, the carburetor VAZ 2109 has fewer sensors. Of these, the only one that really affects engine operation is the Hall sensor. The remaining sensors are needed to inform the driver about the state of the vehicle systems, or to turn on/off actuators. Let's list the sensors of the VAZ 2109 carburetor: 1. Hall sensor 2. Coolant temperature sensor. 3. Oil pressure sensor. 4. Fan switch sensor. 5. Reverse sensor. 6. Parking brake sensor. 7. Throttle valve limit switch. 8. Speed sensor. * Many people mistakenly claim that the VAZ 2109 carburetor has an idle speed sensor. It is not true. The VAZ 2109 carburetor has an idle speed solenoid valve. A valve is not a sensor, it is an actuator. It does not transmit its signal, but rather receives control voltage from the idle speed economizer. 1. I would call the Hall sensor the most important sensor in the VAZ 2109.

Without it, the car engine will not start. Remove every single other sensor and the machine will work. It will not work without a Hall sensor. The purpose of the Hall sensor is to transmit pulses about the rotation of the engine camshaft to the commutator. The sensor is designed to determine the moment a spark is formed by the switch. Without it, there will be no spark and, accordingly, the engine will not start. The sensor is installed in the housing of the ignition distributor of the VAZ 2109 and connected directly to the switch. In case of malfunction, we can easily replace it. 2. The coolant temperature sensor is designed to display the engine temperature on the panel.

Replacement

There is nothing particularly difficult about replacing the DH on a domestic nine. Therefore, even a novice driver can take on the job with his own hands.

Disconnect the negative terminal from the battery.
Disconnect the armored wires from the distributor, disconnect the hose from the vacuum corrector.
Next, remove the gas cable and put it aside for now so as not to interfere with the process.
Unscrew the bracket fasteners that hold the wires. Remove the bracket from the stud and move it aside. Otherwise he will disturb you.
Be sure to draw a straight line on the auxiliary drive housing and distributor. This location will allow you to avoid disturbing the ignition timing during reassembly.
Disconnect the power supply with wires.
Remove the plugs from the clutch housing and turn the flywheel with a screwdriver so as to set the piston of the first cylinder to the top dead center position.
To remove the distributor, you need to unscrew two more mounting nuts holding the device.
Remove the cover from the distributor, remove the slider and pull it up. Only a little.
Remove the dust cover.
Now unscrew the mounting bolt to remove the plug.
We also need to unscrew the bolts that hold the plate of our desired sensor.
Remove the vacuum corrector mounting bolts, remove the retaining rings, corrector and rod.
To get the wires out, you will need to release the clamp there.
Remove the mounting plate and unscrew the mounting bolts, which will allow you to finally remove the failed Hall sensor.
It is now necessary to install a new sensor and assemble the unit, proceeding in the reverse order.

It is important not to change the ignition settings

Don’t forget, after completing the work, be sure to check whether your carburetor VAZ 2109 is working correctly, and whether you have violated the ignition timing.

The main difficulty in the process of replacing the diesel engine is the need to get to the sensor, as well as the existing risks of disrupting the proper operation of the carburetor. But if you act carefully and strictly according to the instructions, problems can be avoided.

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Design and functions of DPKV

This vehicle unit allows you to adjust the fuel injection system of your vehicle. In addition, the DPKV is responsible for the synchronization of the functioning of each of the fuel injectors and the entire ignition system of the car. The crankshaft position sensor device has the following elements:

Sample of a nylon frame;
Steel magnetic cores;
Winding kit for which thin copper wire is used;
Wiring insulation (usually resin or enamel is used).

The main purpose of this position sensor is to create synchronized operation in the ignition system and when operating a set of fuel injectors. If this spare part malfunctions, unstable operation occurs during fuel supply. Additionally, your engine may suddenly stop running at full speed, causing wear on the valves and cylinders.

How does the fuel system receive the signal from the sensor?

While the sensor is operating, the on-board computer (microcontroller inside the car) determines the specific position of the piston at a certain moment of its operation in each of the cylinders. To regulate operation using a sensor, the process is built according to the following plan:

The crankshaft has a special gear in which 2 teeth are specially omitted.
When the crankshaft moves, all the teeth pass next to the DPKV sensor, greatly distorting the state of its magnetic field.
As a result, pulses are generated in the inductance coil of this device, which are sent to the on-board computer database. In this case, the missing 2 teeth are the starting or zero point, thanks to which the computer determines the initial position of the shaft.
Next, the computer inside the car counts the number of pulses sent by the device and determines the position of the crankshaft in each period of time.
After this, the return signal is sent by the computer to the sensor responsible for triggering the fuel injector, which already supplies fuel to the ignition system.

Thus, if the DPKV works correctly, the car will operate at the highest performance, while consuming a minimum of fuel.

Advice: the electrical diagram on the VAZ-2110 will easily help you find out the cause of the sensor malfunction. It shows the location and combination of all elements of the car.

Crankshaft position sensor (CPS) for the engine of injection VAZ 2108, 2109, 21099

The crankshaft position sensor (timing sensor) is one of several sensors in the electronic engine control system (ECM).

An inductive crankshaft position sensor (2112-3847010-04, 30.3847, 191-3837, etc.) is installed on the engine 2111 of fuel-injected VAZ 2108, 2109, 21099, 2113, 2114, 2115 cars.

The crankshaft position sensor for injection engines of VAZ 2108, 2109, 21099 cars is an electromagnet (winding with a steel core inside) that generates an electromagnetic field.

— Electromagnetic induction – in this case, the occurrence of an electric current when a metal object enters the electromagnetic field of the sensor.

Signs of a malfunction of the crankshaft sensor VAZ 2110 and 2112. Accurate diagnosis

The owners of this family of cars should know the signs of a malfunction of the VAZ 2110 crankshaft sensor in order to be able to navigate a situation when problems arise with the car’s power unit. Motors can be equipped with devices of different designs, so in order to replace them if necessary, you need to look for an analogue of the device used on your machine.

Why is it needed on a car?

If problems arise with starting the power unit, most drivers immediately begin to look for problems in the fuel system or in the car’s ignition unit. But such searches do not always lead to success and the engine starts. After contacting specialists, it turns out that the culprit is the crankshaft position sensor. At first glance, such a small detail, but how many problems arose because of it.

This device is not intended to perform control functions, but to synchronize the phases of fuel injection and provide a signal for its ignition in the combustion chamber of the engine cylinder. Based on this, we can say with confidence that a failure in the operation of this device will lead to a lack of coherence of these systems; starting and operating the motor will be impossible.

The device is an inductive type device that must respond to the passage of teeth on the drive disk. It is installed on the generator drive pulley, and the sensor itself is located next to the pulley. The disk has 60 teeth, two of which are cut off to form a cavity. Thanks to its presence, synchronization with TDC of the engine pistons is carried out. When the depression passes by the device, a signal pulse is generated to the power unit control unit.

There are designs of such products that are based on the Hall effect, where the product also reacts to a rotating disk, but the operation occurs when a permanent magnet passes, after which the resistance of the sensor changes and a control pulse is issued. The VAZ 2110 model is equipped with induction-type products. Its installation location cannot be called convenient for replacement, so the device is equipped with a cable with a connector, its length is approximately 80 cm.

A little about the signs of malfunctions

If this device completely fails to function, it will not be possible to start the power unit of the “tens”, even with a very strong desire. Only its complete replacement will allow your car to continue moving. Situations when this sensor suddenly fails are extremely rare; usually problems begin to accumulate gradually. Drivers begin to notice a significant drop in engine power while driving.

When you sharply press the gas pedal, such an unpleasant phenomenon as “failure” appears. In carburetor engines, this happens when the accelerator pump does not work satisfactorily, but this model does not have it, and the DPKV does not cope with its functions. There are also moments when detonation appears at high engine speeds. Some novice drivers blame the quality of the fuel they fill and continue driving, but this is not the case and can lead to serious damage to the power unit.

It is also necessary to pay attention to this device in the case when, for no apparent reason, the fuel consumption of your car’s engine has become noticeably higher. Problems with this device can also cause unstable operation of the motor in all modes

The sudden failure of this analyzer is mainly due to a manufacturing defect in the manufacture of the product, and the “human” factor is often the culprit. The presence of various types of contaminants in the area of its installation, poor electrical contact in the connector, completely disrupt the operation of all engine systems.

What to do?

There is no need to rush to throw away such a device right away; first you need to check it. You can do this yourself in your garage with a multimeter at your disposal. The reason for the check may be the glow of the “CHECK ENGINE” warning light; experts translate these words as checking the engine. Errors in the form of code 19 or 35 will be detected in the control unit. The essence of checking this device is to measure the resistance of its working winding. In a working sensor, the value should be in the range of 800 - 900 Ohms.

As you can see, there is nothing special about this system. We have discussed the signs of a malfunction of the VAZ 2110 crankshaft sensor, and now we can firmly say that you will be “fully armed” if such a situation arises. “Experienced” owners of dozens recommend carrying it constantly in the car. It is inexpensive, and can help out at the most inopportune moment.

Where is the crankshaft position sensor located?

This component is located in a bracket, which is installed in the central area of the pulley on the generator drive. As a rule, on most modern cars it is not installed end-to-end, but with a gap of 1-1.5 mm near the structure of the toothed pulley itself.

For ease of disconnecting and adjusting the DPKV, a 50-70 cm wire is connected to it, which has the necessary connectors for keys. To align and adjust the position, you only need to adjust the washer secured above the seat of the element itself. Adjusting the washer can be done either by you yourself or by specialists at a car service center - in any case, it will allow you to avoid early breakdown of the engine cylinders and significantly reduce fuel consumption.

Main symptoms of DPKV malfunction

The main signs of problems with the crankshaft position sensor:

The process of “detonating” the engine (a characteristic knocking sound appears when the hydraulic compensators are operating) during a greater load on the car, when driving onto high mountain surfaces at low speeds.
The engine runs unstably - a sharp drop in rpm at idle is followed by an equally sharp increase. Also, your car may simply stall when idling, both while driving on the highway or when stopped for a while, for example, at a traffic light.
The engine does not gain speed, although it is running at full power.
The motor power periodically drops and rises in the absence of any external factors influencing this process.
The aerodynamic characteristics of the car are significantly reduced.
Problems arise when starting the engine (it stalls quickly or does not start at all).
The spark disappears when the system is ignited - it either does not appear or may be completely absent.

If you find at least 3 of the above symptoms, then the problem lies in the crankshaft position sensor.

Tip: the indicated list of faults may also indicate the occurrence of other problems during engine operation. For example, sudden changes in engine power and a decrease in speed may indicate a blockage in the fuel pump itself. That is why before repairs it is necessary to diagnose not only the engine, but also the same wheels. You can see what pressure indicators should be according to the standards in the tire pressure table.

Options for crankshaft sensors on the VAZ-2114

How to check the crankshaft sensor

Crankshaft position sensor

When considering the issue of crankshaft sensor malfunction, it is worth paying special attention to the possible options for this part. According to the technical data of the manufacturer, there are several products that can be distinguished by design features and operating principle:

Inductive. Inside the product there is a metal rod, which is surrounded by a magnet. The entire product has a copper winding, which is connected to the connection wires. When a metal part is located next to the sensor, a pulse appears on the rod and goes to the ECU.
The hall sensor is located inside the crankshaft sensor. When a metal product is attached to it, its state changes.
Frequency. In this case, the electronic control unit sends a certain pulse, and when a metal part approaches the sensor, the frequency of this pulse changes, which gives a signal to the ECU.

Symptoms of a problem

Location of the crankshaft sensor near the flywheel

There are not many signs of a malfunctioning crankshaft position sensor. As practice shows, in many cases, problems with the product are caused by the fact that dirt or plaque adheres to it, which prevents the data from being read, or makes this operation incorrect.

So, let's look at the main signs of a DPKV malfunction:

Schematic designation of the location of the crankshaft sensor relative to the flywheel

Unstable idle mode.
The revolutions are floating. This will be visible from the tachometer reading on the dashboard. It will look like this: the car picks up speed, and then it drops sharply in the same operating mode.
Loss of power.
Acceleration failures.
The car starts very poorly.

In this case, it is worth dismantling the sensor and diagnosing it. It can be done in a simple way - with a multimeter, or if you have an oscilloscope - with this device.

A clear example of the location of the sensor relative to the flywheel

Also, in addition to signs of malfunction, it is worth considering the reasons why the crankshaft position sensor may fail:

Deformation or destruction of the housing.
Short circuit that damaged the winding.
Wear.

Diagnostic methods

With the sensor removed, diagnostic operations can be carried out that will accurately determine the condition of the product and its performance. So, let's look at the methods for diagnosing DPKV:

Using a multimeter. In this case, it is necessary to close the power supply connectors to resistance. The normal value should be 500-700 Ohms.
The second method also involves using a multimeter. A reading of 200 millivolts is set on it, and a metal object is brought to the sensor core. If the sensor is working properly, then a fluctuation in readings will be visible on the multimeter.
Using an oscilloscope. This device shows the most accurate result from all diagnostic methods. The test is carried out in different modes: at 800 rpm (that is, at idle), 2000 and increasing up to 6000. Depending on the result on the screen, the cause of the malfunction can be determined.

Oscillogram for checking the crankshaft sensor

Three ways to check the crankshaft sensor

We will talk to you about how to check an inductive sensor, since, as stated above, this is the type that is most common on modern cars. Before removing the sensor from its seat, do not forget to mark its position on the engine with marks. This will save you from problems when installing it again. So, let's move on to considering diagnostics.

Checking resistance with an ohmmeter

Checking DPKV using an ohmmeter and an oscilloscope

This is the simplest method, but it does not provide a 100% guarantee that such a test will reveal a malfunction. For this procedure you will need a multimeter , which you must switch to resistance measurement mode (ohmmeter). With its help you need to measure the resistance of the inductor. This can be done by simply touching the multimeter probes in pairs to the coil terminals. Polarity does not matter in this case.

As a rule, the resistance value of most coils is between 500 and 700 Ohms. However, it is better to read the exact value in the documentation for the sensor or find it on the Internet. Accordingly, you need to set the upper limit on the multimeter - 2 kOhm (the limit may vary for different models of multimeters, the main thing is that it is larger than what is measured and closest to it). If, as a result of the measurement, you get a value close to the one indicated above, then everything is in order with the coil. However, it is too early to reassure yourself, because such a check is not complete. It is better to continue checking using other methods.

Checking the inductance value

Any coil in an excited state has its own inductance. The same applies to the one that is built into the DPKV body. The verification method is to measure this value. To do this you will need:

megohmmeter;
network transformer;
inductance meter;
voltmeter (preferably digital).

Some multimeters have a built-in inductance measurement function. If your device does not have it, then you should use additional equipment. In any case, the measured value of the inductance of the DPKV coil should be within 200.400 mH (in some cases it may differ slightly). If you receive a value that is very different from the specified value, then there is a high probability that the sensor is faulty.

Next you need to measure the insulation resistance between the coil wires. To do this, use a megohmmeter, setting the output voltage on it to 500 V. It is better to carry out the measurement procedure 2-3 times to obtain more accurate data. The measured insulation resistance value should not be lower than 0.5 MOhm . Otherwise, a violation of the insulation in the coil can be stated (including the possibility of an interturn short circuit). This indicates a malfunction of the device. The coil must be demagnetized using a mains transformer. However, the most advanced method for diagnosing CPPV is to use an oscilloscope.

Checking with an oscilloscope

Oscillogram with a running engine. Red indicates the passage of a place without teeth

Using this method, you can not only find out the controlled values, but also see the process of signal formation. This provides comprehensive information about the state and operation of the DPKV. It is better to carry it out with the engine running. However, you can also remove the sensor. To work, you will need an electronic oscilloscope and software to work with it. The test with the sensor removed follows the following algorithm:

Connect the oscilloscope probes to the terminals of the DPKV coil. Polarity doesn't matter.
Launch the program for working with the oscilloscope.
Take any metal object and wave it in front of the DPKV.
If the sensor is working properly, then at the same time an oscillogram will be displayed on the screen, which will be built based on the data from the sensor.