Signs of a malfunction of the VAZ 2114 crankshaft sensor - TOP 9 symptoms, methods of checking

Using the VAZ-2110 crankshaft sensor, mixture is formed in the fuel rail. This device produces a signal that is sent to the electronic control unit of the internal combustion engine. The device is used only on injection engines; on carburetor engines there is no need for them. Fuel is injected into the combustion chambers of carburetor engines under the influence of atmospheric pressure. And the spark is supplied to the electrodes of the spark plugs by a distributor (ignition distributor).

Purpose, device and principle of operation

The crankshaft position sensor is the main regulating function of the fuel injection system on a vehicle. Its presence ensures synchronous operation of each engine injector and the entire ignition system.

The driver consists of the following components:

• 1 — device of a nylon frame;
• 2 - magnetic circuits, these elements are made of steel;
• 3 - winding kit, for which thin copper wire is used;
• 4 - a layer of electrical circuit insulation, most often in the form of enamel or resin.

Unstable operation of the controller causes temporary interruptions in the fuel supply. During operation of the device, the vehicle control module, which is a microcontroller, ensures the correct piston position at a given time for each cylinder of the internal combustion engine.

To ensure adjustment using the device, the process is based on the following algorithm:

• The crankshaft of the power unit is equipped with a special gear. There are no two gears on it, this was done on purpose.
• When the machine's engine crankshaft begins to move, all the teeth move in close proximity to the controller. This contributes to strong distortions of its magnetic field.
• Signals are generated in the induction coil of the regulator when the shaft moves. Packet pulses are transmitted to the information base, which is located in the memory of the microcontroller. The two gears missing from the shaft are considered the starting point and also the zero point. Due to the absence of these gears, the microprocessor unit diagnoses the initial position of the crankshaft.
• The microprocessor in the car then counts the number of signals sent by the device. Then, after a certain time, the position of the crankshaft is determined.
• The processed pulse data is then sent by the control unit to the controller used to activate the fuel injector. The latter supplies fuel to the ignition system.

If the crankshaft position sensor is working properly, the vehicle's engine will operate at maximum power. The drive unit will require a minimum amount of fuel to achieve maximum power.

Types of sensors

It is worth discussing separately the different types of devices:

• Magnetic induction DPKV. Devices of this type do not require a separate battery for power. The voltage value at a certain time is initialized for the control module pulse. This occurs when the timing gear passes through a magnetic field. A magnetic field appears around the regulator, and the device itself controls the speed of rotation of the shaft and can be used as a speed regulator.
• Hall driver, its operation is based on the Hall effect. This indicates that the current transmission begins when the variable field is applied to the device. The synchronizer roller itself engages the field using gears that influence the field generated around the controller. Hall effect control unit used as ignition distributor.
• Optical type device. This type of driver includes a shaft that synchronizes with holes or teeth. The target causes an overlap of the light flux between the diode element and the receiver. The latter converts the received light flux into a signal. As a result, voltage is applied to the microprocessor module.

A little about the crankshaft

The crankshaft is the most important element of any internal combustion engine. It is driven by the starter (at the moment of starting) and the pistons (in operating mode). From it, torque is transmitted to the gearbox, gas distribution system, and auxiliary mechanisms. And in order for fuel injection to be carried out in a timely manner, a spark to form at the right moment, a VAZ-2110 crankshaft sensor is needed.

It monitors the position of the pulley and transmits a signal to the electronic control unit. The pulley has teeth, the distance between them is the same. But in one place there is a gap - two teeth are missing. The position sensor reacts to the approach of metal. When an empty area passes near the sensor, a signal is generated - the control unit is notified that one revolution of the crankshaft has occurred.

Functionality check

If you decide to check the serviceability of the sensor yourself, treat this procedure responsibly and carry it out correctly. On a VAZ 2114 car, the crankshaft sensor is checked in several ways.

1. Using a multimeter. The serviceability of the induction sensor can be assessed by the resistance of its coil. In a working product it is 500-700 Ohms.
2. On the multimeter, set the measurement limit to 200 millivolts, connect the probes to the terminals (where the standard wires are connected). Pass a steel object several times in front of the core. The working sensor will “see” the metal and there will be voltage spikes on the multimeter display. If there are none, replace the part.
3. But the most accurate results when checking are provided by an oscilloscope. When using this device, one hundred percent results can be guaranteed; it reads all the information from the sensor while the engine is running. It can be observed on the device screen. The engine, during tests, should operate at different speeds. They start with eight hundred revolutions, then two thousand, and raise it to six thousand. If the lines (on the device screen) are of different lengths, you need to look for the cause of the malfunction. Remove dirt, check the pulley for defects, and so on.

Oscillogram of a working sensor

Oscillogram of a working VAZ 2114 crankshaft sensor

It should be noted that these verification methods work on all VAZ models with DPKV. If you have any doubts about your own abilities, then contact the service. Thanks to specialized equipment, the result will be more accurate, and the check will not take much time.

Remove from the engine

The malfunction has been identified. Let's start eliminating it. Let's look at this operation using the VAZ 2114 as an example.

Turn off the car ignition. We open the hood, fix it firmly, and visually determine where the VAZ 2114 crankshaft sensor is located. Before removal, it is advisable to remove all contaminants in the area where it is located. Next, carefully remove the block with wires from the connector.

Connector DPKV VAZ 2114

Using a “10” wrench, unscrew the fastening bolt.

Removing the crankshaft sensor on a VAZ 2114

Removing the DPKV VAZ 2114

After we are convinced that there are no defects of any kind, we proceed to assembly. The seat must be clean. We install the new part in place and fasten it with a bolt (the tightening torque should not exceed 8-12 Newton meters). In this case we use adjusting washers. They are sold complete with a new sensor. Thus, using a special probe, we ensure that the gap between the pulley and the sensor core is one millimeter. The permissible error is 0.41 millimeters in the larger direction.

The gap between the pulley and the crankshaft sensor core on a VAZ 2114

We connect the block with wires into place.

After installation and checking the gap, we try to start the engine. With a confident start and stable operation of the engine, we can say that the repair was carried out successfully.

Despite the fact that the breakdown of the synchronizing sensor is not frequent, knowledge of its symptoms and consequences, as well as methods of elimination, will be useful to the car enthusiast.

Comprehensive check for Opel Vectra B

Now let's take another car and use it to consider the last of the verification methods - comprehensive.

This test is much better than with a conventional multimeter, but in terms of accuracy it is not as accurate as an oscilloscope.

The problem car will now be the Opel Vectra B. We leave the symptoms the same.

The initial work is also no different from the VAZ-2110: the sensor is removed, inspected, thoroughly washed, and only after that you can start checking the condition.

But for a comprehensive check you will need more equipment:

• Multimeter;
• Megaohmmeter;
• Device for measuring inductance.

It is better to take all measurements in a heated room so that the readings are correct.

First, the coil resistance is measured, as described above. Resistance readings must be within the range specified in the technical documentation.

The next check is to measure the winding inductance, for which a device is used to measure it. A working DPKV inductance should be in the range of 200-400 mH.

The devices are pictured below.

The insulation resistance is also checked with a megohmmeter. When a voltage of 500 V is applied, the resistance value of the sensor should be no more than 20 MΩ.

Based on these measurements, it is determined whether the DPKV is working or requires replacement.

Photos of the devices are below.

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.

What happens if the sensor breaks?

If the VAZ-2110 crankshaft sensor fails, symptoms characteristic of its failure will appear. If the device breaks down completely, the engine will stop immediately, since the following processes will not be performed:

1. Complete absence of signals to the ignition module. Sparking does not occur when the crankshaft is cranked by the starter.
2. The flow of gasoline into the ramp completely disappears or slows down.
3. The control unit fails - it stops producing signals necessary for the normal functioning of the engine.

Sometimes the active surface of the sensor simply becomes clogged. In this case, it is enough to clean the dirt. But if the cause of the breakdown lies in the device itself, then you only need to change it completely.

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:

1. Connect the oscilloscope probes to the terminals of the DPKV coil. Polarity doesn't matter.
2. Launch the program for working with the oscilloscope.
3. Take any metal object and wave it in front of the DPKV.
4. 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.

Oscillogram of DPKV VAZ

An oscilloscope is used to accurately diagnose the operation of the DPKV. By connecting the oscilloscope probes, an oscillogram of the DPKV operation will be displayed on the monitor screen, on which you can clearly distinguish the point where the teeth skipped and measure the signal value in volts based on the maximum amplitude of the 58 teeth located between the skip points.

How to change the crankshaft sensor on a VAZ 2109 injector yourself: instructions with photos

There are probably no car owners left who do not know the purpose of the crankshaft position sensor. The VAZ 2109 injector crankshaft sensor is sometimes called a synchronization sensor, because it is thanks to it that the operation of the control unit is synchronized with the power unit.

In a car with an injector, the crankshaft position sensor performs the same function as the Hall sensor in a car with carburetor injection.

The main purpose of the DPKV on a VAZ 2109 with an injector is to read the teeth of a special disk located on the engine crankshaft.

Despite the simplicity of the design and the reliability of the DPKV in the event of a breakdown, a car with an injector may simply not start, and if it does start, it will malfunction.

Where is?

The crankshaft position controller is located on the oil pump cover. As we have already said, its design is quite simple. This is a small magnet with a coil on which a thin wire is wound. Exceptionally hardy. DPKV VAZ 2109 with an injector operates in tandem with the crankshaft pulley. Crankshaft position sensor failure - engine stops. Or reducing the speed of the power unit to 3000-4500 rpm. In the figure, number 1 is the bolt that secures the controller, and number 2 is the controller itself.

Symptoms of a problem

If this small device fails, a VAZ 2109 with an injector may behave differently, but the main symptoms are as follows:

• If there is a noticeable decrease in vehicle dynamics, the “Check Engine” will light up on the panel.
• The engine may decrease or increase speed for no reason.
• Instability at idle.
• Detonation in the power unit under increased load.
• The engine won't start.
• Engine speed fluctuates. Especially immediately after the engine is started.
• Increased fuel consumption.

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.

There are two ways to check DPKV.

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.

Checking the old

The old one is checked as follows:

1. First of all, it must be removed.
2. We connect an ohmmeter to it.
3. We check the resistance.
   For a working one, it is in the range of 550-750 Ohms. Resistance check

Replacement

Replacing the crankshaft sensor on a VAZ 2109 is a very simple process, and any car owner can handle it in 10-15 minutes. Naturally, there is no point in doing this at a service station, paying extra money.

1. The first step is to de-energize the system; to do this, disconnect the negative terminal from the battery.
2. Then everything is very simple: with one hand we take hold of the block of wires and disconnect it from the device.
   Disconnected shoe
3. Use a wrench to unscrew the bolt that secures the device to the bracket.
   Unscrew the bolt
4. Now all that remains is to remove it from the bracket.
   Removing the controller
5. Let's check it out. If it is faulty, we buy a new one; if it works, then we can install it back.
6. A new device or a proven old one is installed in the reverse order.
7. We install the sensor and secure it with a bolt.
8. We connect the wires.

At this point the work is completed, all that remains is to start the engine and check the operation.

Video “Replacing the controller”

This video shows how to replace the crankshaft position controller on a VAZ 2110 car. On earlier models, including the 2109 with an injector, everything is done in the same way.

Description

Where is the DPKV located on a Niva Chevrolet: in the engine compartment, at the end of the engine, above the crankshaft pulley.

Access to the equipment for carrying out maintenance from below, having previously dismantled the metal protection of the oil pan.

DPKV transmits signals to the electronic control unit (ECU) in real time and also reports the direction and speed of the crankshaft.

Based on the data received, the ECU makes a decision to reduce or increase the frequency, enrich the fuel mixture, or change the ignition angle.

Repair and replacement

1. As with all cases of replacing sensors, it is necessary to de-energize the car by disconnecting the negative terminal from the battery.
2. Next, you should disconnect all wires from the sensor.
3. The sensor is held by a single bolt, which is not so easy to reach, but it must be unscrewed.
4. Next you need to remove the sensor from the mount.

Reassemble in reverse order

It is important not to damage the sensor during installation, so you should not lubricate or paint it. Next, you need to check the functionality of the new sensor

The easiest way to check is to check with a multimeter. Everyone has this device in their garage, and if not, then it is sold in any auto store. The new sensor should not fail, so there must be sufficient voltage on it for it to function correctly. To summarize, we can talk about prices. This sensor can be found on any site, in any store and in any condition. The price varies from a couple of hundred to five thousand rubles, which is quite cheap for a device involved in engine control. Therefore, at the slightest malfunction, I advise you to immediately begin replacing the DCPV.

Main symptoms of breakdowns

But if the device has not completely failed, but is only showing signs of breakdown, you will see it immediately. A light will light up on the instrument panel to indicate engine errors.

This will be accompanied by the following signs:

1. Unstable idle.
2. Reduced traction characteristics of the vehicle.
3. Spontaneous change in engine speed.
4. Difficulty starting the engine.
5. The presence of pops in the intake manifold.

If such symptoms are present, you need to replace the VAZ-2110 crankshaft position sensor. It is located near the oil pump cover, next to the generator drive pulley.

How to check for sensor malfunction with the device?

Despite the fact that a sensor malfunction is usually determined by the above symptoms, this may not be enough for a correct diagnosis, since different types of breakdowns have the same symptoms. Dips during acceleration can also occur when other parts are deformed, such as the ignition system or braking system, and this also occurs when the engine itself malfunctions.

You can definitely check the sensor using the following method:

We buy a voltmeter (it’s easy to find in any car store) or a multimeter, which is even better. On the multimeter we turn on the voltmeter function, measuring 200 mV. Now we connect the probes to the sensor. And then the most interesting thing: take any screwdriver (necessarily with a metal rod) and hold the screwdriver close to the sensor. The data on the voltmeter will change, monitor its data: if the device shows 0.3 V, then the device is working properly; If the readings fluctuate, replace the sensor without a doubt.

OPERATING PRINCIPLE AND LOCATION

It should be noted that malfunctions of the crankshaft sensor (controller here and further in the text) are rare, however, when going on a long trip, it is better to have a spare working sensor, if the DPKV fails, then further driving of the car most often turns out to be impossible. Let's move on to the principle of operation:

• The toothed pulley of the electric generator drive is made in the form of a disk with 58 teeth around its circumference, located every 6 degrees
• In order to generate a speed synchronization pulse for the injector, two teeth are specially missing on the pulley

Scheme of operation of a sensor with a pulley

• The car is equipped with either an all-metal pulley or a pulley with a damper (rubber insert)
• All-metal pulleys are practically not subject to wear during engine operation.
• You only need to ensure that there is no dirt or foreign particles between the teeth
• If the pulley has a damper, then you need to monitor the condition of the damper; damage to the damper will definitely lead to problems with engine operation
• When performing repair work, you must be careful not to subject the pulley to deformation; deformation can lead to interruptions in the operation of the motor.
• You can visually check the condition of the generator drive pulley by looking through the front right wheel arch
• In our case, the engine has an all-metal pulley
• If a malfunction occurs in the crankshaft position controller, or the drive pulley of the electric generator, as well as the timing drive, the computer may record an error, which will be reflected by the “CHECK ENGINE” light coming on.
• And enter the corresponding code “35” or “19” into the error buffer

The following symptoms characterize the occurrence of malfunctions of these elements:

• Unstable engine speed at idle
• There is a spontaneous decrease or increase in engine speed
• Complete stop of the engine and complete inability to start the engine
• Noticeable decrease in engine power
• The appearance of detonation under standard dynamic loads, as well as misfiring (motor trouble)

The question remains for the VAZ 2112 where the crankshaft sensor is located, the answer is - it is located on the oil pump cover.

Location of the crankshaft position controller

How to check crankshaft sensor 2114, 2113, 2115?

To check the crankshaft sensor 2114, 2113, 2115, you must perform the following steps:

1. We open the hood of the car and, using a feeler gauge, check the gap between the end of the DPKV VAZ 2114, 2113, 2115 and the teeth of the crankshaft gear flywheel. The gap size should be within 1±0.41. The gap is not adjustable. It is predetermined by the design of the crankshaft sensor. If the gap between the end of the VAZ 2114, 2113, 2115 DPKV and the crankshaft toothed flywheel is larger, then it is necessary to clean the dirt from the sensor and the seat.
2. Next, using a multimeter, we check the circuits connecting the crankshaft sensor 2114, 2113, 2115 to the controller.
3. After this, we remove the DPKV and inspect it for mechanical damage. If the sensor is broken, it must be replaced.
4. Then, using a multimeter, we measure the resistance of the crankshaft sensor coil winding of VAZ 2114, 2113, 2115 model 2112-3847010 (191.3847). It should be in the range of 0.570 - 0.750 kOhm
5. After this, using a multimeter, we check the functionality of the crankshaft sensor 2114, 2113, 2115. To do this, set the multimeter to voltmeter mode, in the range of 200 mV. We connect multimeter probes to the terminals of the crankshaft sensor VAZ 2114, 2113, 2115. We take a screwdriver and hold its blades near the end of DPKV 2114, 2113, 2115. Numbers should appear on the multimeter display. If this does not happen, then the crankshaft sensor is broken and needs to be replaced.
6. Next, we check, using a multimeter, whether there is a short circuit in the winding of the DPKV VAZ 2114, 2113, 2115 coil to the body of the magnetic core. To do this, turn on the multimeter in dialing mode. We connect one multimeter probe to the end of the magnetic core, and the second in turn to the terminal terminals of the sensor. If the sensor shorts out, it must be replaced.

Algorithm of operation of the injection system

The microprocessor has several inputs and outputs. The inputs receive signals from all sensors. But first, these signals are converted and, if necessary, amplified. The microcontroller is programmed to work with sensors and actuators. Programs (firmware) can provide various engine characteristics.

You can achieve an increase in power (gasoline consumption will increase) or a decrease in consumption (power will suffer). But most motorists prefer programs that provide work with average parameters. In this case, the signal from the VAZ-2110 crankshaft position sensor does not change; only the reaction of the actuators to changes in input data is adjusted.

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.

Symptoms of malfunction

The problems that can arise as a result of a sensor malfunction are different. Below are some of the possibilities:

• no spark
• the car won't start
• RPM drops when driving or idling

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

Step-by-step instructions for self-diagnosis

To check the condition of the DPKV we need a multimeter. The measuring device is available to many car enthusiasts. If you don't have it, you can purchase it at any auto store. The price is affordable.

• From under the bottom of the car, disconnect the terminals from the sensor.
• We bring the limit switches to the contacts;
• Turn on the multimeter, set the position of the regulator to “resistance”;
• We carry out actual measurements;
• We compare the obtained data with standards. If the arrow tends to infinity, the controller is working. If it goes to “zero”, it’s a breakdown. Normally, readings should be 550-750 Ohms.

Depending on the diagnostic results, the technician makes a decision on the advisability of further operation of the equipment.

Dismantling and installation

So, you have determined that the DPKV has failed. Therefore, there is nothing left to do but replace it. To do this you will have to dismantle the old device.

1. Turn off the ignition and open the hood. Securely secure it to avoid unpleasant blows to the back or head.
2. Remove any dirt from around the sensor so that it can be removed and visually inspected.
3. Disconnect the wiring block from the corresponding connector.
4. Using a 10 mm wrench, you can easily remove the crankshaft sensor mount.
5. Remove the damaged device.
6. At the same time, be sure to check the generator drive timing pulley. It is not uncommon for damage to appear on it, due to which the device cannot operate correctly. These teeth cause error codes to appear on the on-board computer.
7. If there are no defects and nothing prevents the installation of a new device, begin assembly.
8. If necessary, clean the installation site of the DPKV.
9. Place the new measuring device in the socket and tighten the mounting bolt. In this case, do not exceed a tightening torque of more than 12 N m.
10. Be sure to use the adjusting washer, which is already supplied by responsible sensor manufacturers.
11. Using a special feeler gauge, make sure that there is a gap of 1 millimeter between the pulley and the DPKV core.
12. The gap error can be no more than 0.41 millimeters in the upward direction. Under no circumstances should the gap be less than the required 1 mm.

Price issue

As we have already noted, VAZ 2114 owners are not often faced with the need to change the DPKV. But always be prepared for such troubles.

You don’t have to spend a lot of money purchasing a new sensor. The price depends on the store and region where car parts are sold. On average, a recreation center costs about 200-400 rubles.

Replacement at a service station is still a cost around the cost of several sensors. Therefore, think about who exactly will do the work - you or the car service specialists.

Based on the types of repairs that a car enthusiast is able to perform on his own, one can judge his qualifications and experience in operating a car. If for the owner of a 9th VAZ series car, replacing the crankshaft oil seal of a VAZ 2109 does not present any difficulties, then we are dealing with a trained car owner who will not contact a car service center for every trivial breakdown.

When and why is the VAZ 2109 crankshaft oil seal replaced?

Replacing the crankshaft oil seal is a rather complicated procedure, but quite doable even in an ordinary garage that does not have special devices and professional tools.

Recommendations for care and maintenance of the controller

• strictly comply with the car manufacturer's regulations;
• do not violate the terms of technical inspection, even when the factory warranty has expired;
• buy and install mainly original parts, the catalog numbers of which correspond to the factory markings;
• Carry out the installation work yourself if you have sufficient experience, otherwise use the services of professional workshops;
• Do not install parts or accessories from other technical equipment, even if they are similar in appearance. Full functionality is not always guaranteed.

The average service life of the DPKV is 80,000 km or more.

Sensor malfunctions

The following symptoms may indicate a malfunction of the crankshaft sensor:

• the engine stops unexpectedly;
• the engine is unstable during idle;
• obvious missing sparks are noticeable;
• Engine power is noticeably reduced, especially on inclines;
• engine speed spontaneously increases or decreases;
• under various dynamic loads, the appearance of detonation is noticeable;
• difficulties starting the engine and much more.

All of the above examples, taken separately or together, indicate that it is time to change the sensor. To fully verify that it is necessary to replace the crankshaft sensor on a VAZ 2110 or other models, you need to conduct testing.

Sensor performance test

There are several ways to check the sensor. Each method requires the presence of certain instruments. Let's look at two main verification methods that give accurate results.

Replacing the crankshaft sensor VAZ 2114

After removing the sensor, and how to do this will be described in detail below, you need to carefully inspect it. A visual inspection will help determine the condition of the core, terminal block and the contacts themselves. If traces of dirt are noticeable on the sensor and prevent a normal inspection, they should be removed using a cloth soaked in alcohol or gasoline.

Also, the contacts must always be clean. In addition, when dismantling, you need to pay special attention to the distance between the sensor core and the disk. If it is not close to the value of 0.6-1.5 mm, then the sensor most likely has defects. If everything is normal, this does not mean that the sensor is working. Only an ohmmeter will allow you to determine the presence of obvious malfunctions in the operation of the crankshaft sensor

This device should measure the resistance of the synchronization sensor winding. The normal value output by an ohmmeter should be 550-750 ohms. To be sure, it is recommended to check in advance the exact parameters in the car’s operating instructions, which may vary depending on the manufacturer. If the value given by the ohmmeter measurement differs from those indicated, then there is a problem with the sensor.

Replacing the crankshaft sensor on a VAZ 2114

Another verification option involves more extensive testing. To carry it out, you will need the following tools:

• voltmeter;
• inductance meter;
• megohmmeter;
• network transformer.

When measurements are carried out using this method, the air temperature should be 20-22 degrees. As for the winding resistance, we measure it using the method described above. So:

• To determine the inductance of the crankshaft speed sensor winding, you will need to use an inductance meter. It will show how an inductive coil, capacitance and resistance work. The normal inductance value should be 200-400 MHz.
• The insulation resistance is checked using a megohmmeter. At a voltage of 500 V, this figure should not exceed 20 MΩ.

Based on the results that the devices give, you can find out exactly whether the sensor is working or not.

DPKV location - design features

Typically this sensor is located near the alternator belt drive pulley. On this pulley there is usually a gear ring made around the circumference, the so-called synchronization disk. It is to the rotation of this disk that the sensor responds.

It is worth noting that in order to accurately obtain data on the rotation of the crankshaft, the DCPV is located at a certain distance from the disk.

For a correctly installed device, the distance between its core and the top of any tooth should be 0.6-1.5 mm.

The location of the DKPV is not the most convenient, but it is quite possible to get to it.

Cars use several different DPKVs in design and operating principles:

• induction (one of the most common);
• sensor using the Hall effect;
• Optic.

We won’t talk about the design and operation features of each of them for now; let’s move straight to the malfunctions.

Crankshaft sensor for VAZ 2109

The domestically produced VAZ-2109 differs mainly from its predecessor VAZ-2108 in the number of doors. The first models had a body width of 165 cm, in subsequent ones it was reduced to 162 cm.

This car features a more spacious interior and excellent body shock absorption in serious collisions. Also, the VAZ 2109 has a more spacious trunk. If desired, the size of the luggage compartment can be increased by folding the rear seat. This car is front-wheel drive. It is also worth noting a noticeable increase in stability and maneuverability, making it difficult for the car to skid, even if you resort to emergency braking.

The main advantages of the VAZ-2109 are:

• dynamics and good speed characteristics;
• stability on any road surface in any weather conditions;
• affordable price for middle class people.

Idle speed control

Where is the oil pressure sensor on a Kamaz
? As in engines with a carburetor, an injection engine keeps idle speed with the throttle valve fully closed. This is possible only under one condition - if the design of the throttle provides for a bypass channel, and it must have a variable throughput. To do this, a conical valve was installed in the bypass air channel of the throttle body, regulating the air supply when the throttle valve is closed, and called it IAC, idle air regulator. It consists of a conical valve, a stem and a stepper motor. Depending on which winding the impulse is applied to, the motor rotates in one direction or the other, thereby changing the throughput of the bypass air channel. The idle either rises or falls as a result of the movement of the cone valve. The idle speed sensor on the VAZ 2115 has catalog number 1148300 02.

How to check

The most common failure of the IAC is a break in the windings of the stepper motor. To check the windings, you need a multimeter turned on in resistance measurement mode. The resistance value between contacts A-B and C-D is within 45-80 Ohms. Otherwise, the regulator requires replacement. There should be infinite resistance between pins AD and B-C. This means that the windings do not short circuit each other. If there is resistance at these contacts, the sensor is replaced. Rated supply voltage is from 7.4 to 14.1 V.

Error codes for DPKV malfunction

Using ECU self-diagnosis, you can check the operating status of all systems. For different cars, the checking principle is approximately the same. You need to connect certain contacts on the block for diagnostics. You can determine the malfunction by the blinking frequency of the “CHECK ENGINE” lamp

The most important thing when connecting contacts is that the ignition is turned off. And, upon completion of the test, you can remove the jumper no earlier than ten seconds after turning off the ignition

On a GAZelle car, the diagnostic block is located in the engine compartment. To check, you need to close contacts 10 and 12 of the diagnostic connector. Violations in the DPKV power system or in the sensor itself have code 53.