How to check the crankshaft sensor? - DRIVE2.

Each car owner is well aware of how much for the performance of the car is the crankshaft position sensor (DPKV). It is also sometimes sometimes, due to the fact that with it, the operation of the electronic engine control unit is synchronized, this device is called synchronization sensor.

When a breakdown occurs in the operation of the described sensor, it is impossible to start the engine or the failure will occur in its operation, which can lead to a complete stop (reduction of power, malfunctions). Also, this sensor is responsible for synchronizing the fuel supply when turning the key in the ignition lock.

Signs of misuse of the crankshaft sensor:

- a noticeable lowering of its dynamic characteristics during the movement of the machine (of course, this problem may have different reasons, but it is about this malfunction that the controller will report, which will record the problem and lit "Check Engine" on the instrument panel). - The motor spontaneously lowers or increases Turns; - At idle there is no stability in turnover; - the occurrence of detonation in the engine during dynamic load; - the inability to start the engine.

Only the main characteristic indicators of the breakdown of the crankshaft rotation sensor, pulley of the timing timing or generator.

Initially, it is necessary for yourself to understand how to make a high-quality check of its performance and it is 100% confident that everything is in order. Why should this check need to be performed first?

Everything is quite simple. Despite the fact that in most cars this sensor is not located in a very convenient place, its service check takes at all the resources and time. After checking, you will be absolutely clear whether it is necessary to replace the sensor.

How to check the crankshaft sensor?

Check the serviceability of this sensor (DPKV) in several ways. For each option, you will need to use certain devices. The most commonly used three main approaches to checking the operability of the crankshaft speed, consider them.

Based on the advice of professionals, always before checking the crankshaft sensor must be dismantled, without forgetting, while labeling its initial location on the engine. It is clear that after removal it is necessary to make a visual inspection of the sensor. The results of the visual inspection make it possible to detect damage on it, to understand the condition of the contact pad, the core of the contacts themselves. Pollution should be removed using alcohol or gasoline. The crankshaft sensor should have clean contacts. In the dismantling process, you must set the distance from the sensor core to the synchronization disk. It should vary from 0.6 mm to 1.5 mm. In the absence of visible problems, you can proceed to the detection of this device hidden in the electrical circuit.

Sensor diagnostics using an ohmmeter

To measure the resistance of the crankshaft sensor, you can use an ohmmeter (multimeter). Properly functioning sensor will show values ​​from 550 to 750 ohms.

This test is tester (multimeter) consists in checking the resistance of the inductive sensor coil. Since with a damaged coil, the sensor characteristics are displayed primarily on the resistance. Install the desired range and check the leads on the outputs. Such a check is the most elementary and simple, for this can not give 100% confidence that the diagnosis of the sensor is supplied correctly.

If you want to not doubt your own actions, before starting work, examine carefully instructions for your car. When you received, measurement indicators do not correspond to the stated interval, it is necessary to replace the crankshaft rotation sensor.

The second approach to testing the performance of DPKV is more time-consuming and you will need more devices for it:

- megaommeter; - Network transformer; - inductance meter; - voltmeter (preferably digital);

The room temperature in the room matters to the correctness of the resulting indicators, preferably 20-22 degrees. The resistance of the winding, as mentioned earlier, we measure the ohmmeter.

Next, go to measure the inductance of the winding using a special meter. The normal sensor should be equal to 200-400 mg.

Next, using a megommeter, go to the measurement of insulation resistance. If the voltage is 500B, this parameter cannot exceed 20 MΩ.

If you occur random magnetization of the synchronization disk due to the repair of the sensor, it is necessary to produce its demagnetization using a network transformer.

Analyzing all obtained as a result of measurement data, indicators, you can make a conclusion about the performance of the crankshaft sensor or need to replace it. Do not forget when installing the place of a new or old instrument, carefully focus on the labels left by you when dismantling, remembering the need The presence of a distance of 0.5-1.5 mm from the core to the synchronization disk.

The third method of diagnosing the crankshaft speed sensor is the most accurate and applied at professional stations. It requires an oscilloscope and program. It does not need to dismantle from the instrument engine. As it allows you to see the generation of the signal. The presence of a digital oscilloscope allows specialists to effectively detect various problems in the injection system.

Signal diagnostics from the output of the oscilloscope sensor

To obtain correct indicators, a black oscilloscope clamp is needed, called the "crocodile", connect to the mass of the car being checked, the probe of the probe is set parallel to the signal output of the sensor. The second oscilloscope probe connector should be connected to analog input No. 5 USB AUTOSCOPE II. The manipulation data must be performed in order to see the waveform oscillograms at the input of the crankshaft position sensor.

Next, you must select the mode to display the "inductive_crankshaft" waveform. Now you can run the car. If the start of its engine is not possible, you must twist the engine starter.

When the signal from the crankshaft position sensor is present, but its output parameters do not coincide with normal, twitching of the machine may be observed, difficult to start its engine, failures ... Such violations of the output signal of the crankshaft sensor serve as evidence of the existing faults or the sensor itself, or the same synchrodis and breakage teeth. The truth of the assumptions about the fault will be clearly understood when considering the nature of the wave on the oscillogram of the voltage synchropulse, removed at the output of the crankshaft position sensor.

You got acquainted with three possible ways to check the crankshaft sensor:

- Checking a multimeter (winding resistance); - test tester (insulation resistance and inductance); - check on the oscilloscope.

The method of checking each chooses itself in its capabilities and knowledge. Be objective in the results obtained, as well as extremely attentive and careful when checking.

Articles on similar subjects

Device of the crankshaft sensor

Crankshaft
This is a metal detail of a complex shape having cervix for mounting rods. It is an integral part of a crank-connecting mechanism (CSM). The main function of the part is to convert the efforts from the connecting rods to the torque.
Crankshaft position sensor (DPKV)
This is a sensor reading electromagnetic pulses from the crankshaft pulley and gives it to the on-board computer. Synchronization of the ignition system and fuel injectors depends on DPKV.

At the very end of the article you will find a selection of video checks!

Today in the automotive industry There are 3 types of DPKV : optical, induction and based on the Hall effect. In this article we will tell you how to check the crankshaft sensor, on the example of the most popular induction type.

  • Induction - consists of a magnetized core over which copper wire is wound. The end of the coil is located as close as possible to the crankshaft, to measure the speed of its rotation and voltage changes;
  • Optic - Based on the LED emitting light and receiver which records the moment of disappearance and the appearance of light. When the beam of light is interrupted, while entering the control tooth, the receiver fixes and transmits data to the ECU;
  • Hall Sensor - There is a magnet on the crankshaft, there is a permanent current when the sensor passes pass, the data is fixed and sent to the ECU.

Regardless of type, Any DPKV sensor is designed for Transmission to ECU 2 parameters.

  • the moment of passing the pistons through the upper dead point and the lower dead point;
  • Measurement of the crankshaft.

The data received is sent to the ECU, after which Adjustment occurs The following indicators.

  • The corner of the camshaft;
  • ignition advance angle;
  • Volume of supplying the fuel mixture;
  • Adsorber valve operation.

Depending on the technical complexity of the engine, the task for the computer may drastically differ, but none of the currently existing control units can work without the crankshaft sensor!

If the crankshaft sensor is faulty, in the work of the engine may be failures in the form : Relaxing sparking, ahead of the ignition angle, depleted fuel-air mixture, all this leads to an unstable engine operation or to start it at all.

Signs of the crankshaft sensor fault

Depending on the year of the car, the technical complexity of the engine and electronics Symptoms of one malfunction can manifest in different ways. . There are situations where all signs indicate a certain breakdown, as a result, a completely different node is subject to replacement. We tried to describe all of the signs of the crankshaft sensor in the most detailed as possible, whatever you can determine the maximum breakdown.

  • Symptom number 1 Reduction of dynamic characteristics;
  • Symptom number 2. Dips with intensive acceleration;
  • Symptom number 3. Detonation with intense acceleration "due to fuel-air mixture";
  • Symptom number 4. During the movement, turns can vary spontaneously;
  • Symptom number 5. Unstable idling;
  • Symptom number 6. The appearance of an error on the dashboard "For example error No. 53";
  • Symptom number 7. All items progress;
  • Symptom number 8. The crankshaft sensor is completely out of order, the engine will not work.

As a rule, signs of malfunctions are not united, they are combined and quickly progress. Paragraphs No. 1, No. 2 and No. 3 usually arise at one time with the appearance of an error, there are in the future unstable turnover appear both at idle and while driving.

Methods for checking the sensor

We will tell about 4 ways to check the inductive sensor, as it is most common. Removal is accompanied by a mandatory visual inspection!

Before removing the sensor, be sure to apply the labels of its initial position!

Verification diagnostic scanner

The total technical condition (including the crankshaft sensor) can be checked using a diagnostic scanner. From the market presented on the market we can recommend Scan Tool Pro Black Edition.

Diagnostic scanner

This device is compatible with most old and new cars since 1993, if there is an ODB2 connector. The advantages of this model include the diagnostics of not only the engine, as well as the accompanying car systems. Connection occurs using Bluetooth (for Android) and Wi-Fi (for iOS). All information about the total condition of the car and the description of the existing problems is displayed on the phone / tablet screen in Russian.

Oscilloscope check

oscilloscope
oscilloscope

This method is the most accurate However, not every car owner has experience with the oscilloscope and the device itself is not at hand. If your disposal does not experience and the device itself, you can immediately go to the next instruction.

What is the advantage of using an oscilloscope? It allows you to see and fix the process of generating signals and see the process of their formation!

Algorithm verification:

  • one. Contact probes must be connected to the sensor contacts, the polarity itself does not have a value;
  • 2. Run the program for diagnostics;
  • 3. Using any metal object, you must spend a couple of times in close proximity to the sensor;
  • four. If your DPKV sensor is working, each object movement will be fixed on an oscillogram, if defective, the waveform will remain unchanged.

Signal formation can be different! With 100% confidence of the serviceability of the sensor, only an experienced master can say.

Check the inductance value

Multimeter digital
Multimeter digital

For the inductance test of the DPKV coil, the following equipment will be required:

  • one. Multimeter having a function of measuring inductance;
  • 2. If your multimet does not support this function, then the inductor is needed;
  • 3. megaommeter;
  • four. Network transformer.

To get the most correct data The check should be carried out in the room having an air temperature of 21-23 degrees Celsius!

Step number 1

You should navigate the results Inductance within 200 - 400 mg .

Multimetr Supports function It is necessary to connect 2 multimeter probe with 2 coil outputs, the polarity does not matter.

Multimetr does not support the necessary function For checking use inductance meter.

Step number 2.

The megohmmeter will be required to the output voltage of 500 V. We check the insulation resistance between the coil wires at least 2 times! The insulation resistance value should not be below 0.5 MΩ.

Step number 3.

In step No. 2, the magnetization of the "Mixless Short Circuit" coil may appear, as a result of which the data will be incorrect. It is necessary to use the network transformer, after repeat step number 2.

Check Ommeter

Ommeter
Ommeter

This method is the most common , of all listed. Despite the simplicity, he has one significant drawback, it has serious errors and is not able to give 100% guarantees to identify malfunction.

The method involves measuring the resistance of the inductance coil, for it You need an ordinary multimeter having an "Omometer" resistance measurement function. Necessary Connect 2 probe multimeter with coil outputs, polarity does not matter.

A good sensor must Have resistance within 530 - 730 ohms. At the beginning It is necessary to look into the documentation of your sensor or search the Internet, what resistance is considered normal.

A selection of video

The sensor position of the engine crankshaft or abbreviated DPKV tracks the state of its pulley along two missing tooths. They were not specifically placed that the device "felt" how the shaft rotates. In other cases, magnets are used for labels on the shaft. The information is transmitted on the cable to the electronic engine control unit for processing. It helps the computer to sync the work of the crankshaft and the ignition system, ensuring the timely feeding of the spark and fuel injection in the engine. What are the signs of the crankshaft sensor malfunction and how to check it, consider below.

Device and where the crankshaft position sensor is located

The countercader plays an important role in good operation of the power plant, so all manufacturers of auto placed it in easy accessibility for checking and repair. DPKV is located on the right side of the engine on the side of the flywheel in the area of ​​the cylinder block. You need to search above the pallet, closer to the starter and the revealing nozzles of the coolant.

Location DPKVLocation of the crankshaft position sensor

It is usually attached to one or two bolts (depending on the modification) and has a small wire with a contact chip. The element is covered with an elastic polymer resistant to oils and high temperatures

Sensor position relative to the crankshaft markDPKV position relative to the tag

The determination of the position of the shaft is fixed in two missing teeth or dedicated control (depends on the type of flywheel). DPKV "Notes" is visually and with the help of electromechanical processes. Three varieties of the controller distinguish.

With Hall Sensor

Works with a magnet installed on the flywheel. Whenever he passes by the sensor, permanent current is excited in DPKV. This is fixed with a synchronizing disk, and the information is transmitted to the engine control unit.

DPKV with Hall SensorDPKV with Hall Sensor

Optic

Has a LED in the device. Works in a pair with a receiver. The beam always leaves and reflects. When the glow is interrupted, this means that the controller passed the controller. On it and the position of the crankshaft is determined.

Optical DPKV.Optical DPKV.

Inductive

It contains inside the magnetized coil reacting to the electromagnetic field. If indicators change, the mark is recorded, meaning a specific pulley position on the shaft.

Inductive crankshaft sensorInductive DPKV

The last type is distributed most and installed on all modern cars with an injector fuel injection system into the engine. In addition to the position of the crankshaft, it is capable of determining the speed of rotation, so more functional.

Signs of malfunction

To understand what signs of malfunctions can relate to DPKV, consider it briefly involved in the engine. Asymmetrical protrusions on the crankshaft are consistently affected by rods, piston pistons in cylinders. The latter compress air and insignia compression. In parallel, the timing through the GBC submits the right amount of air to the cylinders.

The engine control system "understands" the position of all participants based on the DPKV data (provided that the timing is properly installed), and opens the nozzles for the release of gasoline. From the ignition coils served as a spark on the candle, and the air-fuel mixture is flammable. The engine works smoothly and does not twitch.

When the crankshaft sensor malfunction is disturbed by the process synchronization. ECU of the engine does not know what time gasoline is served, which affects the work of the engine.

Diagnosis will help to find the cause of the breakage, but about it is slightly lower.

Among the signs of malfunction indicating the possible breakdown of DPKV are found:

With the final malfunction of the crankshaft sensor, the engine cannot be started at all. But this can only be installed by checking where the diagnostics will show the state of other participants in the ignition system.

Widget methods

The above symptoms may be signs of malfunction not only the crankshaft sensor. Such symptoms also apply to ignition candles, displaced tags in the timing unit, high-voltage wires, ignition coil. It is important to know how to check the controller.

Checking DPKV will help make sure that the malfunction is in it, and not in the throttle of the timeline or dirty throttle of the engine.

There are several diagnostic methods. Since most DPKV inductive, we will consider checking exactly such a controller on the shaft.

Wrench

If the engine does not start, and there are no measuring instruments and a hundred different differences, the position sensor check can be performed by a wrench. For this method, it is good to have a second person in helpers:

  1. Open the hood and unscrew the locking bolt of the sensor.
  2. Remove DPKV outward and clean it from dirt.
  3. Turn on the ignition.
  4. Remove the pillow on the second row of seats so that it is better to be heard the operation of the fuel pump in the tank.
  5. Not removing the contact chip, attach a wrench to the end of the sensor.
  6. The second person must hear the inclusion of the fuel pump at this moment.

Such a key check provokes the triggering of an induction coil and imitates the passage of pulley. If the fuel pump is included every time when the metal object is applied, then the controller responds to the position of the shaft. If the pump is not heard, the symptom will definitely indicate a breakdown.

Oscilloscope

Checking the oscilloscope crankshaft sensor is performed in two ways and gives a more accurate representation of the controller's reaction to the position of the shaft. In the first case, the action takes place on a muted motor, but when the ignition is turned on.

The sensor is removed from its place, and the crates of the oscilloscope are applied to its contacts. Polarity here does not matter here. Next, in front of the end part of the sensor are carried out with a metal object (it is possible to the same wrench). The coil should work on the metal, but instead of removing the back seat and listen to the sound of the fuel pump, the reaction will be visible on the oscilloscope screen.

Check DPKVCheck DPKV Oscilograph

You can more accurately perform the test on the engine running, connecting the oscilloscope parallel to the DPKV outputs. Then the program will show not only the reaction, but also a complete picture of the controller. The screen will show the amplitude of the electromagnetic field. It should be with smooth upper and lower boundaries, as well as equal separation intervals indicating the passage of the control area. If such pauses are larger or edges of the oscillogram of oscillograms, it means that the flywheel is broken or some teeth have erased. This leads to an incorrect sensor reaction. Then the case is not a malfunction of the crankshaft sensor, but in the mechanical part. It will be necessary to replace the wint of the flywheel.

Multimeter

Checking the crankshaft sensor by a multimeter is performed in the resistance measurement mode. To do this, the step switch is set to the corresponding position. DPKV is extracting outside, and the probe multimeters are inserted into contacts.

Check DPKV MultimmeterChecking the sensor multimeter

Most sensors have a coil resistance range in the range of 500-700 Ohms (more precisely, you can learn from the characteristics of a particular model and data of the manufacturer). Therefore, the device must be installed on top value in 2000 Ohm. If the tester shows smaller values, it means that the coil winding isolation is broken. Such a malfunction requires the replacement of the sensor. The lack of testimony on the tester means that the circuit is broken and DPKV unsuitable for operation.

In addition to resistance, some multimeters are capable of checking inductance. The crankshaft position sensor, this indicator should be 200-400 mg. A strong deviation from the specified range proves the fault of the controller.

Diagnostic scanner

Those who are more professionally suitable for repairing their car have a diagnostic scanner in the toolkit. It helps to check not only the sensor, but also other parameters of the gasoline engine. The OBD-2 Scan Tool Pro scanners are very popular among Korean descent products.

Diagnostic scannerDiagnostic scanner

The device is inserted into the regular connector of the car and binds to the ECU. Using a laptop, phone or PC, there is a pair of Bluetooth or Wi-Fi network. A special program will be required. The screen displays the collected errors. Among the fault codes belonging to the crankshaft position sensor: P0336 and P0335. The scanner check is the presence of a signal from the position sensor and the ability to determine the specifying label to synchronize the subsequent engine operation.

Check Ommeter

If there is no multimeter at hand, but there is an ohmmeter, then it will also fit. It will take on a plugged motor to remove the crankshaft electrode and touch the instrument outputs to the contacts in the connector. The working parameters of the DPKV must be within 500-700 Ohm. If the resistance is highly high, it means somewhere there is no interference to the passage of the electric current. In the case of too low, the integrity of the winding is broken.

Trouble-shooting

Checking may show the inability of the electrodechik to fix the state of the crankshaft. In this case, when confirming the failure of the DPKV, it will be necessary to replace it with a new one. But if the breakdown happened on the way and to the nearest auto shop or the maintenance station far, you can try to find and troubleshoot yourself. Sometimes the problem lies not in the coil of the induction device, but in contacts.

Cleaning from dirt

For example, a common problem is the pollution of the working part of the lubricant from the flywheel. The latter flies on the sensor and covers it with a thick layer of dirt. The dust and sand sticks on top, as well as metal chips. All this creates interference to the element. In this case, you will need to unscrew one or two holding bolts, remove the DPKV to the outside and wipe it well the housing protruding after the stop. Then return the device back and try to start the engine again.

Dirty DPKVDirty PKV sensor

Trouble contact

Another common problem is an open wire. It happens often before the contact of the contact. In this place the wires bend, which leads to a gradual refraction. Visually, the violation of the integrity of the conductor can be unnoticed, since the outer insulation remains the whole.

To troubleshoot a problem, remove the connector and pull the contact pins light on yourself. The breakdown will come out and will remain in your hands.

Repair will require to clean the isolation and link the bare ends. Then the area is insulated (you can use the Cambrick or Islenta). But this measure is temporary and will require subsequent soldering.

Pollution contacts

Although the connector is protected by a rubber seal, it gradually loses elasticity and tightness. Because of this, moisture penetrates inside, dust. The process of corrosion begins. Contacts are oxidized and the chain is interrupted. As a result, the serviceable DPKV ceases to determine the condition of the crankshaft and the motor stalls.

Dirt on DPKV contactsDirt on DPKV contacts

To solve the problem, try cleaning the pin pins. They are in the deepening and get to them can be subtle supel or sandpaper, rolled into the tube. Put the gathered inside dust, restore the connection and try to run the motor.

Related problems

If the DPKV "is nicknamed" and there is no violation in the integrity of contacts, the breakdown may be associated with the missing teeth on the flywheel. The electrodechik simply "confuses" the ECU, triggered on the additional "tags" formed. It will be able to determine only the mechanic for a hundred. For repair, you will need to replace the wint of the flywheel.

DMRV (determines the mass flow of air) also affects the work of DPKV and causes deviations in the testimony. The problem is diagnosed in the service.

The bend of the flywheel "eight" is able to enter the crankshaft cell "misconception", and here you will need to remove the box and replacing the deformed part.

Sensor position crankshaft Designed to synchronize the ignition system and the operation of fuel injectors in a gasoline injection engine. Accordingly, its breakdown will lead to the fact that the ignition will rush or deposit. This will lead to incomplete combustion of the fuel mixture, unstable engine operation or its full failure.

Currently, there are three types of sensors - induction, based on the Hall effect, as well as optical. However, the most common are sensors related to the first type (induction). Next, we will talk to you about possible faults and methods to eliminate them.

Crankshaft sensor

Signs of the crankshaft sensor fault

Regardless of which technology, DPKV works, signs of faults in its work are always the same. If the crankshaft sensor does not work, then the following signs will tell you about it:

The crankshaft sensor which will fail due to a large amount of metal chips

  • a significant reduction in the dynamic characteristics of the machine (although this factor may be a consequence of other breakdowns, it still costs to diagnose DPKV);
  • Engine speeds are rapidly changed;
  • In idle mode of rotation of the motor "float";
  • During the dynamic load in the engine, detonation occurs;
  • With the full failure of the DPKV, it becomes impossible to start the engine.

Next, briefly stop on the crankshaft sensor device in order to better understand the causes of faults and the methods of their elimination.

Device of the crankshaft sensor

In order to understand the work and error of DPKV, first of all, it is necessary to deal with the principle of the sensor. It is a steel core design, wrapped in a copper wire placed in a plastic case. All wires are isolated from each other compound resin.

Crankshaft / camshaft position sensor. Device and purpose

Video lecture on the device and destination of the crankshaft position sensor / camshaft. Functional features and failure of the sensors of the position of the crankshaft and the camshaft (DPKV and DPRV). For more

 

The task of the device is to fix the passage of the metal teeth of the pulley near the sensor. It has 60 teeth, 2 of which are absent. It is the passage of this empty gap that must fix the sensor. This makes it possible to synchronize the operation of the ignition system and the power system in order to ensure the correct fuel sequence through the nozzles. This is necessary to create an optimal fuel mixture.

Before moving directly to the description of the principle of operation of the crankshaft sensor, it is necessary to indicate that there are three types of their varieties. In particular:

  • Induction sensor . It is based on the use of the magnetized core, around which the copper wire is wound (coil), the ends of which are removed to fix the voltage change. It is this type of sensor that is most often installed in modern machines.
  • Optical sensor Works on the basis of the LED, which radiates the light beam and receiver fixing this beam on the other side. When the control tooth is passed, the beam is interrupted, which is fixed by the control device. Information about the speed of rotation is transmitted to the ECU.
  • Hall Sensor . It is based on the physical effect of the same name. Thus, a magnet is installed on the crankshaft, which is fixed by the sensor in which the DC movement begins at this moment, which is fixed by the synchronizing disk. You can read more about this in the next article.

Next, we proceed to consideration of faults.

Three ways to check the crankshaft sensor

We will talk to you about how to check the inductive sensor, because, as mentioned above, this type is most common on modern cars. So, we turn to the examination of the diagnosis.

Check OBD-2 scanner

On the road, the diagnostic scanner will help faster. The most affordable and popular is Korean Scan Tool Pro Black Edition .

What does the diagnostic scanner look like

Crankshaft sensor error during diagnosis

If with visual inspection you did not notice the dirt and chips on the bottom of the DPKV (can be cleaned with gasoline or alcohol), then it is necessary to connect the OBD2 scanner to the car and any google application will connect via Wi-Fi or Bluetooth from the phone to the car. The most popular applications on the smartphone:

  • Torque (maximum compatibility with scanner capabilities);
  • Auto Doktor OBD;
  • Mobileopendiag;
  • InfoCar - OBD2.

Diagnostic fault codes (DTC) of the crankshaft sensor - P0335 or P0336 Depending on whether there is a signal from the sensor in general and whether the synchronizing protrusion is detected on the switch tooth. Also in real time you can see the number of engine speeds and whether there is a synchronization of the ignition phases along the voltage signal pulse period.

Insofar as Scan Tool Pro. Works on a 32-bit chip, all these moments he can show and save in memory. Also, it is also possible to diagnose not only the engine, but also other knots and car units (gearbox, transmission, ABS, ESP auxiliary systems, etc.).

But, since the ability to check the scanner is not all, then we still offer to stop in more detail on checking the sensor with a multimeter and an oscilloscope, it gives the most accurate analysis of its performance. Before removing the sensor from its landing place, do not forget to designate its position on the engine. It will save you from problems when it is re-installed.

Verification of resistance to the Ommerom.

Check DPKV with an ohmmeter and oscilloscope

This is the easiest method of checking with your own hands, but it does not give 100% guarantees that such a check will identify a malfunction. For this procedure You will need a multimeter which you must switch to resistance measurement mode (Ommeter). With it, it is necessary to measure the resistance of the inductor inductor. It is possible to do this by simply touched by the arrivals of the multimeter pairly to the conclusions of the coil. Polarity in this case does not matter.

As a rule, the resistance value of most coils is within 500 ... 700 ohms. However, it is better to read the exact value in the documentation for the sensor or find on the Internet. Accordingly, at the multimeter you need to install the upper limit - 2 kΩ (the limit may differ from different models of multimeters, the main thing is that it is more measured and closest to it). If, as a result of the measurement, you got a value close to the designated above, it means that everything is in order with the coil. However, soothe yourself early, because such a check is not complete. It is better to continue checking with other methods.

Check the inductance value

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

Inductivity meter

Inductivity meter

  • megaommeter;
  • network transformer;
  • inductance meter;
  • Voltmeter (preferably digital).

Some multimeters have built-in inductance measurement feature. 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 must be within 200 ... 400 mpn (In some cases, it may differ slightly). If you got a value that is very different from the specified one, then the likelihood is that the sensor is faulty.

Next you need to measure the insulation resistance between the coil wires. To do this, they use a megaommeter, setting the output voltage on it equal to 500 V. The measurement procedure is better to spend 2-3 times to obtain more accurate data. Measured The value of the insulation resistance should not be below 0.5 MΩ . Otherwise, you can state the insulation disorder in the coil (including the possibility of the emergence of the intersensional short circuit). This indicates a device malfunction. Magnicing the coil must be carried out using a network transformer. However, the most advanced DPKV diagnostic method is to use the oscilloscope.

Check using an oscilloscope

Oscillogram on the engine running. Red designated place without teeth

With this method, you can not only find out the controlled values, but also to see the process of generating signals. This gives comprehensive information about the status and operation of DPKV. It is better to conduct it on the engine running. However, you can remove the sensor. You will need an electronic oscilloscope and software to work with it. Checking with a sensor removed along the following algorithm:

  1. Connect the oscilloscope probe to the conclusions of the DPKV coil. Polarity does not matter.
  2. Run the program to work with the oscilloscope.
  3. Take any metal object and wave them before DPKV.
  4. If the sensor is working, simultaneously with this, the oscillogram will be played on the screen, which will be built according to the data from the sensor.

If the sensor recorded the movement of the metal object, it means that it is most likely working. However, the exact diagnosis can be delivered only When the oscilloscope is connected to the engine sensor . This is done simply by connecting the probe in parallel to the sensor outputs. The oscillogram thus obtained will give you information about the generating signals.

RESULTS

The position sensor inductive type crankshaft is simple, however, a very important device. With the signs described above, it is necessary to make it diagnostics. Which method to choose depends on the presence of the necessary instruments and tools at your disposal. We advise you to start with the simplest method for measuring the resistance of the coil. If you do not have the tools and appliances described above, you will call the machine to a hundred, where the wizards will hold full diagnostics for you.

Ask in the comments. Reply be sure!

So exactly!

What is the crankshaft position sensor? The answer lies in his name: to determine the position of the crankshaft. That's so simple, yes. But besides this, the same sensor defines another important detail - the moment of passing the pistons of the upper and lower dead dots. He does this, of course, not himself - everything considers the ECU. But without it, this data is simply impossible. Just in case, let's say a few words about why this data is needed and how it uses them.

Despite the seemingly poor information that DPKV transmits, it is extremely necessary for adjusting by a block of several parameters at once. First, it is, of course, the fuel supply time. By the way, here it is just important to determine the moment of passing dead points. Secondly, this is the ignition advance angle. Thirdly, not without the participation of DPKV is determined by the number of fuel supplied. And, finally, this sensor is needed to synchronize the operation of the crankshaft and camshafts and for the normal functioning of the adsorber (to be more accurate - its valve). If everything is summed up, then the crankshaft position sensor is one of the main sensors, the signal from which the ECU is required for correct ignition control. Of course, they are not limited to them, without it the motor can not work normally either. And sometimes - and just just work, at least somehow. After all, if the ECU does not know, at what moment he should be applied to the spark plugs or told the nozzles to injected the next dose of fuel, where to go a motor? Just sick.

Actually, it usually happens. The case is complicated by the fact that DPKV practically does not know how to "bug" because of its simplicity. So if he dies, it does it completely. One of the least difficult consequences is the emerging phase error (for example, P0016). Of course, in this error, first of all, the desire arises to check the gas distribution mechanism (maybe the chain stretched, rearranged the timing belt or something wrong with the tensioner or the calm of the chain or with the pulley pulley damper). But this error may well be lit and DPKV.

At one moment, the ECU sees that the signal from the camshaft location sensor does not coincide with the signal position sensor signal of the crankshaft. With normal operation, peaks on an oscillogram must coincide once, since only one revolution will make a camshaft for two turns of the crankshaft. If, when you apply two signals, it is distinguished by a distance, the phase error appears. Thus, the ECU not only controls the ignition and injection, but also conducts a kind of self-diagnosis, checking the synchronization of the phases. And DPKV is one of the elements that in the course of this self-diagnosis passes a permanent verification. Somehow distorting or carrying a signal in time This sensor cannot, and its only malfunction is a complete absence of a signal.

Light, Magnet and Hall

There are three types of DPKV: optical, induction (magnetic) and a sensor based on the Hall effect (sometimes it is called it - the Hall sensor). To work, each sensor needs one more detail - a setting (or referring) disc, which is worth either on the crankshaft pulley, or directly on its toe. The task of the reference disk: rotate at the same speed as the crankshaft, and feed signals about each turn of the sensor.

Optical sensor is used less than the rest. It consists of two parts: from the light source and its receiver. This is usually a LED and photodiode, respectively. When the specifying disk is rotated at a certain point, it covers the LED, and the photodiode captures the signal change. The disadvantage of this type of sensor is obvious: if it covers dust or mud, it will not work. It is much easier and the induction sensor works reliable.

This is just a coil with a magnetic core and winding. At the time of passing the mark of the reference disk next to the sensor, near the core, the magnetic field changes, and the current appears in the winding. Well, and the current is the signal that the ECU is so waiting. Induction sensors are the most popular. They are reliable, simple, inexpensive and almost reliable.

Hall sensor - it is the Hall sensor. In the housing with magnetic pipelines, the chips are, and the reference disk for such a sensor is characterized by magnetized teeth. Further everything is clear: the magnetized tooth passes near the sensor, the current occurs, the computer receives the signal. Theoretically is the most advanced sensor, although more complex. At least for one reason: he needs food, and hence, there are more wires to it. But he is very accurate.

I think I have to say a few words and about asking disks. It is usually a simple toothed disk that has no pair of teeth. Typically, the total number of teeth is 60. Thus, each teeth refuses 6 degrees of rotation (6x60 = 360, full revolution). Such discs are called 60-2 (without two teeth). But sometimes there are discs that have no two teeth on the opposite side (after 180 degrees). They are called type 60-2-2.

If the material for optical and induction sensors usually do not bother (they are often cast from steel with the crankshaft pulley), then the discs for the hall sensor are slightly more difficult due to the need to put magnets into teeth. Therefore, they are usually plastic.

Twitches, does not go, it does not start

Just in case we describe the symptoms of failure of the DPKV. As I said, the car will not normally go or start a motor can be generally impossible. In addition, it is a rare case when the motor can sall right on the go without visible reasons.

Since the disappointing DPKV makes changes to the operation of the ignition system, it is possible to detonation (especially under load). At idle, the motor can be unstable, can float turns. In short, a bouquet of consequences is big and unpleasant. And it is hardly possible to deal with all this set without diagnosis. But DPKV has one pleasant feature: often it can be very easy to remove, and put a new one instead. Most often, it is not even not necessary to erase errors or perform other actions with a scanner: if the motor earned, it's about this sensor. This, of course, is good, but it is unlikely that someone has a stock of DPKV. Maybe there is a way to check it without replacement? And even without a scanner? Yes, this method is.

Small blood

Finger, of course, do not check the DPKV, you will need at least a multimeter. And you can only check the most common induction sensor. The method is very simple: I exhibit the multimeter to the module mode and check the resistance of the coil. It is different in sensors, but the approximate value of the coil resistance is from 500 Ohm to 1 com. Of course, it is advisable to find the exact value of that sensor that is on a particular car. But in general, you can focus on these values ​​- 0.5-1 com.

Unfortunately, this method does not allow one hundred percent result. That is, the lack of resistance is a guarantee of the failure of the sensor, but its presence is not yet a guarantee of its normal operation. And in normal DPKV services check by two more ways. But for the first one is needed at least a meter of inductance, for the second - oscilloscope. Neither of the other house just do not hold so much, so I will not describe these methods.

Sadly, but the Hall Sensor is not possible to check out the usual multimeter, so it will be necessary or expensive equipment, or (which is much easier and more efficient) a new sensor. In general, the replacement of a suspicious sensor on knowingly good is the best diagnostic method.

Fortunately, DPKV itself breaks extremely rarely. Inside it, nothing moves and does not wear out, so it does not work with it. It is usually damaged when the repair is crucial, so if there is a suspicion that DPKV began to fool after visiting "Uncle Vasi", this suspicion can be quite justified.

Before you look for an ohmmeter mode on the multimeter and think where to shove two probe to the sensor, you must inspect it outside. No matter how easy it is, if he is inadvertently enhanced with a hammer, he can die. More often, he dies from the dirt from entering it and the disk. The distance between them is small (on average 0.5-1.5 mm), so even a small pebble, unsuccessfully sticking to the dirt, can bring a lot of grief.

In addition, like any electrical part, the sensor may refuse to work due to faulty or oxidized wiring. Therefore, you need to check its connectors, and if they are dirty or oxidized, clean. It may happen that the problem is in them, and not in the sensor.

And last: the shaking and storm motor along with the burning Check Engine and the errors P0016 (as well as Р0335 or Р0336) do not always indicate the malfunction of the DPKV is definitely. Yes, there are errors that more or less exactly indicate the absence of a signal from the sensor, and a good diagnost will see it immediately. It is best not to engage in "self-medication" and turn to a professional.

Interview

Did you ever break the DPKV?

How to ring the crankshaft sensor

How to check the crankshaft sensor

Device of the crankshaft sensor

Today in the automotive industry There are 3 types of DPKV : optical, induction and based on the Hall effect. In this article we will tell you how to check the crankshaft sensor, on the example of the most popular induction type.

  • Induction - consists of a magnetized core over which copper wire is wound. The end of the coil is located as close as possible to the crankshaft, to measure the speed of its rotation and voltage changes;
  • Optic - Based on the LED emitting light and receiver which records the moment of disappearance and the appearance of light. When the beam of light is interrupted, while entering the control tooth, the receiver fixes and transmits data to the ECU;
  • Hall Sensor - There is a magnet on the crankshaft, there is a permanent current when the sensor passes pass, the data is fixed and sent to the ECU.

Regardless of type, Any DPKV sensor is designed for Transmission to ECU 2 parameters.

  • the moment of passing the pistons through the upper dead point and the lower dead point;
  • Measurement of the crankshaft.

The data received is sent to the ECU, after which Adjustment occurs The following indicators.

  • The corner of the camshaft;
  • ignition advance angle;
  • Volume of supplying the fuel mixture;
  • Adsorber valve operation.

Depending on the technical complexity of the engine, the task for the computer may drastically differ, but none of the currently existing control units can work without the crankshaft sensor!

If the crankshaft sensor is faulty, in the work of the engine may be failures in the form : Relaxing sparking, ahead of the ignition angle, depleted fuel-air mixture, all this leads to an unstable engine operation or to start it at all.

Signs of the crankshaft sensor fault

Depending on the year of the car, the technical complexity of the engine and electronics Symptoms of one malfunction can manifest in different ways. . There are situations where all signs indicate a certain breakdown, as a result, a completely different node is subject to replacement. We tried to describe all of the signs of the crankshaft sensor in the most detailed as possible, whatever you can determine the maximum breakdown.

  • Symptom number 1 Reduction of dynamic characteristics;
  • Symptom number 2. Dips with intensive acceleration;
  • Symptom number 3. Detonation with intense acceleration "due to fuel-air mixture";
  • Symptom number 4. During the movement, turns can vary spontaneously;
  • Symptom number 5. Unstable idling;
  • Symptom number 6. The appearance of an error on the dashboard "For example error No. 53";
  • Symptom number 7. All items progress;
  • Symptom number 8. The crankshaft sensor is completely out of order, the engine will not work.

As a rule, signs of malfunctions are not united, they are combined and quickly progress. Paragraphs No. 1, No. 2 and No. 3 usually arise at one time with the appearance of an error, there are in the future unstable turnover appear both at idle and while driving.

Methods for checking the sensor

We will tell about 3 ways to check the inductive sensor, as it is most common. Removal is accompanied by a mandatory visual inspection!

Oscilloscope check

This method is the most accurate However, not every car owner has experience with the oscilloscope and the device itself is not at hand. If your disposal does not experience and the device itself, you can immediately go to the next instruction.

What is the advantage of using an oscilloscope? It allows you to see and fix the process of generating signals and see the process of their formation!

  • one. Contact probes must be connected to the sensor contacts, the polarity itself does not have a value;
  • 2. Run the program for diagnostics;
  • 3. Using any metal object, you must spend a couple of times in close proximity to the sensor;
  • four. If your DPKV sensor is working, each object movement will be fixed on an oscillogram, if defective, the waveform will remain unchanged.

Signal formation can be different! With 100% confidence of the serviceability of the sensor, only an experienced master can say.

Check the inductance value

For the inductance test of the DPKV coil, the following equipment will be required:

  • one. Multimeter having a function of measuring inductance;
  • 2. If your multimet does not support this function, then the inductor is needed;
  • 3. megaommeter;
  • four. Network transformer.

To get the most correct data The check should be carried out in the room having an air temperature of 21-23 degrees Celsius!

Step number 1

You should navigate the results Inductance within 200 - 400 mg .

Multimetr Supports function It is necessary to connect 2 multimeter probe with 2 coil outputs, the polarity does not matter.

Multimetr does not support the necessary function For checking use inductance meter.

Step number 2.

The megohmmeter will be required to the output voltage of 500 V. We check the insulation resistance between the coil wires at least 2 times! The insulation resistance value should not be below 0.5 MΩ.

Step number 3.

In step No. 2, the magnetization of the "Mixless Short Circuit" coil may appear, as a result of which the data will be incorrect. It is necessary to use the network transformer, after repeat step number 2.

Check Ommeter

This method is the most common , of all listed. Despite the simplicity, he has one significant drawback, it has serious errors and is not able to give 100% guarantees to identify malfunction.

The method involves measuring the resistance of the inductance coil, for it You need an ordinary multimeter having an "Omometer" resistance measurement function. Necessary Connect 2 probe multimeter with coil outputs, polarity does not matter.

A good sensor must Have resistance within 530 - 730 ohms. At the beginning It is necessary to look into the documentation of your sensor or search the Internet, what resistance is considered normal.

A selection of video

How to check the crankshaft sensor?

see also

P0336 - Crankshaft sensor error

Channel sensor malfunction

Check engine sensors

The car stalls on the go. A selection of discussions

Crankshaft / camshaft position sensor. Device and purpose

Sensor position crankshaft Designed to synchronize the ignition system and the operation of fuel injectors in a gasoline injection engine. Accordingly, its breakdown will lead to the fact that the ignition will rush or deposit. This will lead to incomplete combustion of the fuel mixture, unstable engine operation or its full failure.

Currently, there are three types of sensors - induction, based on the Hall effect, as well as optical. However, the most common are sensors related to the first type (induction). Next, we will talk to you about possible faults and methods to eliminate them.

Signs of the crankshaft sensor fault

Regardless of which technology, DPKV works, signs of faults in its work are always the same. If the crankshaft sensor does not work, then the following signs will tell you about it:

  • a significant decrease in the dynamic characteristics of the machine (although this factor can be a consequence of other breakdowns, it is still worth conducting DPKV diagnostics);
  • Engine speeds are rapidly changed;
  • In idle mode of rotation of the motor "float";
  • During the dynamic load in the engine, detonation occurs;
  • With the full failure of the DPKV, it becomes impossible to start the engine.

Next, briefly stop on the crankshaft sensor device in order to better understand the causes of faults and the methods of their elimination.

Device of the crankshaft sensor

In order to understand the work and error of the crankshaft sensor, first of all it is necessary to deal with the principle of its work. It is a steel core design, wrapped in a copper wire placed in a plastic case. All wires are isolated from each other compound resin.

Crankshaft / camshaft position sensor. Device and purpose

Video lecture on the device and destination of the crankshaft position sensor / camshaft. Functional features and failure of the sensors of the position of the crankshaft and the camshaft (DPKV and DPRV). More details

The task of the device is to fix the passage of the metal teeth of the pulley near the sensor. It has 60 teeth, 2 of which are absent. It is the passage of this empty gap that must fix the sensor. This makes it possible to synchronize the operation of the ignition system and the power system in order to ensure the correct fuel sequence through the nozzles. This is necessary to create an optimal fuel mixture.

Before moving directly to the description of the principle of operation of the crankshaft sensor, it is necessary to indicate that there are three types of their varieties. In particular:

  • Induction sensor . It is based on the use of the magnetized core, around which the copper wire is wound (coil), the ends of which are removed to fix the voltage change. It is this type of sensor that is most often installed in modern machines.
  • Optical sensor Works on the basis of the LED, which radiates the light beam and receiver fixing this beam on the other side. When the control tooth is passed, the beam is interrupted, which is fixed by the control device. Information about the speed of rotation is transmitted to the ECU.
  • Hall Sensor . It is based on the physical effect of the same name. Thus, a magnet is installed on the crankshaft, which is fixed by the sensor in which the DC movement begins at this moment, which is fixed by the synchronizing disk. You can read more about this in the next article.

Next, we proceed to consideration of faults.

Three ways to check the crankshaft sensor

We will talk to you about how to check the inductive sensor, because, as mentioned above, this type is most common on modern cars. Before removing the sensor from its landing place, do not forget to designate its position on the engine. It will save you from problems when it is re-installed. So, we turn to the examination of the diagnosis.

Verification of resistance to the Ommerom.

Check DPKV with an ohmmeter and oscilloscope

This is the easiest method, but it does not give 100% guarantee that such a check will identify a malfunction. For this procedure You will need a multimeter which you must switch to resistance measurement mode (Ommeter). With it, it is necessary to measure the resistance of the inductor inductor. It is possible to do this by simply touched by the arrivals of the multimeter pairly to the conclusions of the coil. Polarity in this case does not matter.

As a rule, the resistance value of most coils is within 500. 700 ohms. However, it is better to read the exact value in the documentation for the sensor or find on the Internet. Accordingly, at the multimeter you need to install the upper limit - 2 kΩ (the limit may differ from different models of multimeters, the main thing is that it is more measured and closest to it). If, as a result of the measurement, you got a value close to the designated above, it means that everything is in order with the coil. However, soothe yourself early, because such a check is not complete. It is better to continue checking with other methods.

Check the inductance value

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

  • megaommeter;
  • network transformer;
  • inductance meter;
  • Voltmeter (preferably digital).

Some multimeters have built-in inductance measurement feature. 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 must be within 200. 400 mg (In some cases, it may differ slightly). If you got a value that is very different from the specified one, then the likelihood is that the sensor is faulty.

Next you need to measure the insulation resistance between the coil wires. To do this, they use a megaommeter, setting the output voltage on it equal to 500 V. The measurement procedure is better to spend 2-3 times to obtain more accurate data. Measured The value of the insulation resistance should not be below 0.5 MΩ . Otherwise, you can state the insulation disorder in the coil (including the possibility of the emergence of the intersensional short circuit). This indicates a device malfunction. Magnicing the coil must be carried out using a network transformer. However, the most advanced DPKV diagnostic method is to use the oscilloscope.

Check using an oscilloscope

Oscillogram on the engine running. Red designated place without teeth

With this method, you can not only find out the controlled values, but also to see the process of generating signals. This gives comprehensive information about the status and operation of DPKV. It is better to conduct it on the engine running. However, you can remove the sensor. You will need an electronic oscilloscope and software to work with it. Checking with a sensor removed along the following algorithm:

  1. Connect the oscilloscope probe to the conclusions of the DPKV coil. Polarity does not matter.
  2. Run the program to work with the oscilloscope.
  3. Take any metal object and wave them before DPKV.
  4. If the sensor is working, simultaneously with this, the oscillogram will be played on the screen, which will be built according to the data from the sensor.

If the sensor recorded the movement of the metal object, it means that it is most likely working. However, the exact diagnosis can be delivered only When the oscilloscope is connected to the engine sensor . This is done simply by connecting the probe in parallel to the sensor outputs. The oscillogram thus obtained will give you information about the generating signals.

RESULTS

The position sensor inductive type crankshaft is simple, however, a very important device. With the signs described above, it is necessary to make it diagnostics. Which method to choose depends on the presence of the necessary instruments and tools at your disposal. We advise you to start with the simplest method for measuring the resistance of the coil. If you do not have the tools and appliances described above, you will call the machine to a hundred, where the wizards will hold full diagnostics for you.

Diagnosis of the crankshaft sensor: 3 methods and steps

The car does not start - with such a problem, I probably faced every car enthusiast. In this case, the problem can be in any way - ranging from empty gas tank and ending with defective ignition candles. But sometimes it is not enough, because the reason why the vehicle does not start, it can be convened in a faulty crankshaft sensor. About how the crankshaft position sensor is inspected, you can learn from this article.

Sensor and threat functions of his breakdown

The purpose of the crankshaft position sensor (DPKV) is to synchronize the supply of gasoline and the start of the engine. The device sends a signal to an electronic control unit, which, in turn, and regulates the operation of these systems. The principle of operation is given below.

When the crankshaft starts the move, a current pulse appears between the installed regulator and the shaft knot. At this point, the control unit begins reading the pulses and sends a signal about the need to open the nozzles. It also gives a signal to the ignition module, after which the latter sends a spark on the candles. Since there are no two teeth on the crankshaft disk, it allows the control unit to determine the position of the upper dead point. Accordingly, so he learns when you need to give signals on the nozzles and the spark on the candle.

So the DPKV looks like

The threat of breakdowns of the device is fraught with the fact that in case of failure of the DPKV, the motor launch will be impossible.

Signs of malfunction

As for the basic signs of malfunction, they are shown below. This information will partially help you determine the device breakdown.

  1. First of all, these are changes in the engine and the vehicle as a whole. In particular, dynamic characteristics are significantly reduced while driving. Of course, in this case, the reasons for such a malfunction can be the most diverse, but this is reported by the controller, turning on the Check light on the dashboard.
  2. While driving a car can behave incorrectly, in particular, the turnover can be spontaneously both falling and climbing. It may negatively affect the ride as a whole.
  3. When the motor operates at neutral speed, the turnover can also fall and change. In the case of an incorrectly operating sensor, it will be observed constantly.
  4. When the car rides a mountain, the motor power will be significantly falling. It should also be noted that the drop in power will be accompanied by the appearance of detonation.
  5. Well, finally, the last symptom lies in the impossibility of running the motor. This happens when the device fully failed.

Methods of diagnosis

Now consider the diagnostic methods at which the crankshaft sensor is inspected at home on their own. These methods are somewhat and each of them we will look at in detail. But to make diagnostics, you must have at least minimal knowledge about the use of devices that we will talk about below.

Check multimeter (winding resistance)

You will not need tools, just prepare the multimeter in advance, since the diagnosis will go through it with it:

  1. First, you should dismantle the regulator, after which it is to fix its original position on the motor. You can determine the location of the device on the service manual. So, you need to fix the regulator, while noting its position position.
  2. After that, just in case, make a visual diagnostics of the sensor, possibly the cause of its malfunction lies in damage to the case or wires. The device itself together with the contacts must be cleaned and wipe, for these purposes, you can use fuel.
  3. When you dismantle the device, pay attention to the distance between the synchronization shaft and the core. The most optimal option will be if this gap is not below 0.6 mm and more than 1.5 mm. If mechanical damage is not detected, then you will have to use a multimeter. In particular, it will be necessary to diagnose the electronic component of DPKV, namely, its windings, since in most cases the problem is precisely in it.
  4. The diagnostic procedure of the winding is to check the resistance. If you know how to handle a multimeter, then this process will not cause you special difficulties. The resistance indicator at the operating sensor should be from 55 to 750 ohms, however, after all, before checking, we will recommend you to familiarize yourself with the service book to your car. As a rule, the working interval is indicated there. In the event that when diagnosing the signal is different from the one that should be, most likely, the case is precisely in the malfunction of the DPKV. Change the regulator while because of it did not come the moment when you cannot start a car.

Check on oscilloscope

As in the previous case, you will not need tools. If you do not know how to check the crankshaft sensor, then this method is more accurate.

Prepare only the oscilloscope, and for more accurate indicators you will also need a clamp (crocodile):

  1. The clamp is connected to the mass of the motor, and one oscilloscope connector should be installed parallel to the controller's signal output, namely on the terminal A. The second connector is connected to the output number 5 USB AutoScope II. It is all necessary to do so that you can see the signal voltage indicators at the device input.
  2. After that, select the mode of operation. In our case, to read the voltage indicators, the "inductive_crankshaft" mode should be activated, after which you want to start the engine. In the event that the motor fails, you can simply turn the starter.
  3. If there is a signal from DPKV, then its output signal does not match normal, then this may indicate the device breakdown. In addition, it can speak not only about the breakdown of DPKV, but also about certain malfunctions of the crankshaft or breakdown of teeth. If signals on the oscilloscope are incorrect, that is, they will "jump", as shown in the photo, you can safely change the DPKV.

Verification of resistance

The third method of diagnosing the tester is complex, which allows you to measure insulation and inductance.

For such diagnostics you will need:

  • network transformer;
  • megaommeter;
  • device for measuring inductance;
  • Voltmeter, it is desirable that it is digital.

It is better to carry out the check in the garage, while it is desirable that the temperature is around 20-22 degrees, this will make it possible to remove more accurate indicators. Here you will also need to measure the resistance of the winding, we talked about this in the first way.

  1. When the resistance is measured, it is necessary to determine the inductance indicator, for this use the meter. If DPKV working, then this indicator should vary in the 200-400 mg area.
  2. After that, take the megohmmeter, you will need to measure the insulation indicator. In the case when the voltage is about 500 volts, the insulation resistance rate should be no more than 20 MΩ.
  3. If the synchronization shaft is magnetized, then you will need to demagnetize it, otherwise the operation of the engine will be impossible. To do this, use a network transformer. After removing all the indicators and analyzing them, it is possible to conclude a statement or failure of the regulator. Of course, if the indicators are deviated from the norm, the device can be considered not workable, respectively, it is necessary to replace it.

When installing a new regulator, pay attention to the previously marked tags that you set when removing DPKV. Do not forget that the distance from the core to the synchronization shaft should vary in the 0.5-1.5 mm area.

Video "Diagnostics of the crankshaft sensor"

About how to check the crankshaft sensor using a multimeter - look at the video.

Symptoms and signs of the crankshaft sensor and its verification

The crankshaft of the DVS is responsible for the conversion of reciprocating movements of the piston system into rotational. The crankshaft position sensor (DPK) is required to simultaneously work the fuel injection system and engine starter. The electronic device signals the faults in the engine fuel supply mechanism and the ignition system.

Why do you need a crankshaft sensor and where it is in the motor

The DPK is an electromagnetic element responsible for synchronizing the engine launch mechanism and fuel injectors.

Basic sensor functions:

  • Information for engine computer. DPD data on the angle of rotation, frequency and direction of rotation of the KV is transmitted to the control unit (ECU). The signal transferred to the DPK on the ECU allows you to accurately determine the volume of fuel injection and start the ignition;
  • The calculation of the average turnover of DVS - data is transmitted to the electronic motor control system and can be displayed on the digital scoreboard on the dashboard;
  • Determination of the acceleration of the twist of kV after igniting the fuel mixture in each cylinder. When the mixture lights up, the pressure of gases is increased, it is accelerated under its exposure, and moving to the next cylinder slows down. Thus, at accelerating the twist, the ECU estimates the efficiency of each cylinder individually and aligns their speed, thereby changing the duration of the fuel injection for each nozzle;
  • Diagnostics of the synchronization of KV and camshaft (PB) by comparing signals from two sensors: DPK and DPRV.

To understand where the DPK is, it is necessary to understand the classification of sensors and know how they look, as depending on the type of sensor, its location in the engine may differ.

DPK are three types:

  1. Inductive (electromagnetic). Principle of operation: a magnet is produced by a magnetic field, which varies with a disk when the synchronicity tooth is passed through it, as a result, a pulse occurs, which is converted to a signal transmitted to BEU to processing.
  2. Using the Hall Effect (digital). The design is a semiconductor, the principle of operation: the synchronic disk, falling into an alternating magnetic field, enters into the interaction with it and generates a signal entering BEU to decrypt.
  3. Optical. The basis for the work of such sensors is the principle of interrupting the light-flow, which comes from the LED to the synchronic disk, in which special holes are made. When the disk rotates, the light coming on it is interrupted, forming a pulse entering the control unit.

Usually the DPK is installed next to the crankshaft pulley in the special bracket. On the handwheel disk of the crankshaft, there are 58 teeth, which are placed in the intervals of 60 mm between each. The gap where there are no 2 teeth, creates an electro-pulse of the synchronization of the revolutions of the kV, which is further converted and transmitted to the ECU.

Please note that DPK externally does not differ much from the same DPRV. The only significant difference in which you can find and define an indicator device of a kV is a long wire that is from it (about 70 cm).

Symptom problems

If the kv sensor is faulty, then the indicator of his breakage can be a number of symptoms indicating that the device must urgently be checked and replaced.

DVS does not start

After turning the key in the ignition lock or attempt to start the OBS in another way - the power unit does not start. The DPK breakdown is the cause of the absence of a spark in the ignition system, as a result, it does not synchronize with fuel feed and the motor will not start. In this case, only a complete replacement of the sensor to the new one will help.

The engine is constantly stupid

DVS stalls on the "neutral" or during the movement of the car. This suggests that DPKV works unstable or is about to fail. In this situation, you should attend a hundred or eliminate the problem as soon as possible;

Motor works unstable (detonation), float turns

The operation of the motor is unstable, with high loads on the power unit (sharp acceleration or float speed) can occur detonation. When there is a problem with the operation of the engine in the dashboard, the corresponding indicator "Check" lights up, signals about malfunctions;

Fall or sudden increase in engine speed. Faulty DPKV provokes an uncontrollable fuel injection into the system, as a result of which the engine begins to "TROL";

Reduced power car

There may also be a decrease in the power characteristics of the motor. Due to the incorrect operation of the crankshaft sensor, the engine works in idle even on elevated transmissions, it is almost impossible to dispel the car to the desired speed. This is due to the lack of synchronicity between the fuel injection mechanism and the ECU.

It is important to know that all listed features can also be provoked by the failure of the system and other components of the FRO. Therefore, before shooting, repairing and changeing the KV sensor, you should diagnose other devices, for example, DPRV, which works with DPKV paired.

How to check the crankshaft position sensor

There are several ways to diagnose DPKV problems. Consider the most popular of them.

Check using the measuring instrument - multimeter

By connecting it to the calling suspicion, the sensor needs to measure resistance. The norm is considered to be an indicator equal to 560 to 745 ohms, but it is better to read the "manual" of a particular brand of the car, since for different models the values ​​of the norm may differ.

Note that in order to measure the resistance - the sensor must be removed.

Application of oscilloscope

Here everything happens almost by the same scheme as with a multimeter. The scan oscillogram displays any defect in the sensor operation. The measuring instrument is connected to the removed DPK and diagnoses.

First of all, attention should be paid to the voltage indicators if it does not comply with the standards declared in the passport of the car (usually 5 or 12 V), it means the DPK is broken, and is subject to replacement.

Testing the value of inductance

This is a comprehensive and accurate method for determining DPK problems, but the most complex one. To measure the inductance, in addition to the multimeter, you will need additional measuring instruments: a voltmeter, a network transformer and a megaometer.

In this case, a complex measurement of all the electronic characteristics of the sensor is performed: resistance, voltage, inductance. All results are compared with the norm and are analyzed in the complex, on the basis of which the conclusion is concluded about the efficiency of the device.

In conclusion, it is worth noting that riding a car with a faulty sensor position of the crankshaft is unsafe, as it can lead to the failure of the motor at the most inopportune moment.

Добавить комментарий