Step-by-step instructions for checking the ABS sensor. Proximity sensor not working How to determine if the sensor is working properly

We have repeatedly said that modern car is a system various devices, which interact with each other using a set of sensors. If one of them fails, then one system fails, causing the other to fail, and so on. In this article, we will look at the main car sensors and how to diagnose them yourself.

So you have The ABS light on the instrument panel came on, What to do? First of all, it is important to understand that this type of sensor is checked by two parameters:

Resistance;
Voltage.

Checking at specialized stations ABS sensor produced by connecting oscilloscope. In this case, the wheels turn in manual mode, and a sinusoid is visible on the device screen. It shows the dependence of the signal frequency on the power of the oscillatory pulses. Sometimes some masters take measurements using the device C-20. On it, the inspector can see the deviations of the arrow, and if the device is of a digital type, then an increase in the voltage value.

ABS sensor signal diagram on an oscilloscope

At home, you can make a special device to test the ABS sensor., which will consist of a resistor from 900 Ohm to 1.2 kOhm, as well as pairs of wires. At the ends of the wires you need to place clamps that can be connected to contact group the sensor itself.

After that, you need to check each wheel. Turn the wheels in one direction, and then in the other. At the same time, connect our resistance to the sensors, turn on the ignition and observe the behavior of the indicator light on the instrument panel. In cases where the light goes out when the resistance is connected, then this sensor can be considered faulty.. Agree this method very interesting, but time-consuming, so let's move on.

To check the ABS sensor with a tester you will need any multimeter modern type. First of all, we measure the resistance, which can be different for each car and its sensor. That is why you first need to find the standard resistance readings for your car.. The bulk of the ABS sensors fit into the range from 1.2 to 1.8 kOhm. When the tester is connected to the sensor and is measuring resistance, try to shake the wires going to the sensor itself. In this case, the readings of the device should not deviate, and if this happens, then there is an open circuit.

Checking the ABS sensor

After these measurements, disconnect the contacts of the multitester and transfer it to voltage measurement mode. Now you need to spin the wheel of the car about up to 40-50 turns in a minute. Next, we monitor the readings of the sensor, which will produce voltage. On all sensors it is equal to 2 volts.

Of course, under ideal conditions, you need to check the sensor by connecting special software, which can indicate more accurate parameters of the ABS and its malfunctions.

Checking the crankshaft sensor with a multimeter

crankshaft position sensor- this is one of the most important sensors without which your car simply will not start or movement on it will be impossible. The main task of this device is to ensure synchronization between the fuel supply and the moment the spark ignites on the candles.

crankshaft sensor

So, you suspect a malfunction of the DPKV. First thing you need to find information on the resistance of this sensor for your car. After that, remove the sensor and remember its position according to special marks. Visually assess the condition of the working part of the sensor. It must be clean and without mechanical damage. If so, then perhaps there is no point in next steps and the sensor just needs to be replaced.

Checking the crankshaft sensor

After a visual inspection, measure the resistance with a tester. To do this, connect it to the working contacts of the sensor and take readings. If the DPKV is working, the device screen will display values from 550 to 750 Ohm. We strongly recommend that you find out what values are normal for your car.

Checking the crankshaft sensor

How to test an oxygen sensor

Oxygen sensor- a modern device that checks the presence of residual oxygen in the exhaust gases of the exhaust manifold.

Checking this element comes down to two steps:

Visual inspection;
Measured by a tester.

Visually, you can easily assess the damage and defects of the oxygen sensor. It should not have soot or mechanical damage.. Also see the underwater wiring so that it does not have a wire short or melt.

Good oxygen sensor

After you were unable to find a sensor malfunction by visual inspection, proceed to measuring the resistance and voltage on it.
send to him workplace. Next, we get acquainted with the underwater block, which has four pins. See the figure below for the purpose of each contact.

Oxygen sensor block

Next, we insert paper clips on the reverse side of the block to which we will connect the measuring ends of the tester. First of all, insert a paper clip into the slot under the first number. The second paperclip is sent to slot number two. Now we connect the voltmeter, and its positive contact to the first paper clip. Negative, respectively, on the second paperclip.

DC signal voltage test

Now you need to start the car and observe the readings of the device. When starting the engine and the first time of its operation, the readings will be equal to 0.1-0.2 volts. After the engine warms up, the readings will increase to 0.9 volts. If this does not happen, then the sensor can be considered faulty.

DC heater check

Suppose the voltage at the sensor has risen. Next, you need to check the heater. We remove the paper clips and check the resistance at the third and fourth terminals. The range of normal resistance is 10-40 ohms.

Checking the DC heater power supply

Now you can check the power supply of the heater circuit. We turn on the ignition, but do not start the engine. We put the voltmeter contact on the fourth terminal, and the negative contact on the second terminal. The screen of the multitester should show a voltage equal to the voltage of the car battery. If this does not happen, then the power circuit is faulty.

How to check the knock sensor with a multimeter

fuel mixture knock sensor is a non-separable element inside which there is a piezoelectric component. When detonation occurs at the moment of fuel combustion, it is accompanied by a certain shock wave. That's what the knock sensor detects. As a result of detonation, some potential appears at the ends of the sensor.

The structure of the knock sensor

This type of sensor can be tested for internal resistance and voltage. The resistance of such types of devices is equal to megaohms. Therefore, you need to get a book on the operation of your car and find the readings you need, and then connect the tester's ohmmeter to the contacts and find out the real data.

To check the voltage, the sensor is completely removed from the car.. The tester is switched to millivolt mode. We connect the positive probe of the tester to the signal wire, and put the negative one on the ground of the sensor in the area of the mounting bolt. After that, you need to gently, with a little effort, hit the sensor on the table, for example. At the moment of impact, the voltmeter will record the presence of voltage. As a rule, this 30-40 millivolts.

How to check the speed sensor

To check this sensor, the first step is to inspect the underwater pad for signs of wear., melting, or simply damaged. Also evaluate the internal socket of contacts. In some vehicles, water or other fractions can get in there, which will lead to oxidation.

Vehicle speed sensor

If outwardly everything is in order, then proceed to the measurements. On most sensors, the polarity of their contacts is indicated. First of all, we will check the sensor with a rotational element. We remove the DC and inspect the poles. We connect the positive contact of the tester to the signal contact of the sensor. We mount the negative probe on the ground of the sensor. Next, we rotate the working element of the sensor and observe the screen of the tester. When rotating, you should have voltage, and if it is not there, then the sensor can be considered faulty.

You can also hang one of the drive wheels on a jack and rotate the wheel. In this case, the second assistant should be near the voltmeter and take readings. The principle is the same as described above, only it is carried out for pulse sensors without a moving element.

A modern injection engine is controlled by many sensors. Only the electronic system that controls the actions of the motor does not always cause a breakdown. How to check the sensors of an injection car - the health of the sensors must be constantly checked, evaluating the performance of parts and components of the power unit. Only the Check Engine lamp indicates a sensor malfunction; it lights up on the parting panel.

To check the sensors, we need: an ohmmeter (multimeter), a dismantling tool.

The throttle position sensor is a variable resistor. Checking its functionality, we measure the resistance between its conclusions.

The readings obtained must be compared with the factory values \u200b\u200bthat are indicated in the instructions. Normally, if the discrepancy is 20 percent.

Another indication of a sensor malfunction is idle instability, possible jumps in the process of increasing speed.

It is not possible to test the knock sensor, specialized equipment must be on hand. There is an indirect sign of a breakdown of the device - this is increased detonation at the time of engine operation. To carry out diagnostics and replacement of the sensor, it is necessary to contact specialists.

The same situation is with the timing sensor. It is mounted on engine units with four valves, directly on the cylinder. To check, you will need special diagnostic tools.

Maybe the car's engine won't start. This means that the crankshaft position sensor is faulty. There is one such sensor that does not turn on if the motor breaks down. To carry out an additional check, we measure the resistance between the terminals, and disconnect the connector in advance. The parameters of this indicator should not exceed 750 ohms.

Sometimes the cause of the breakdown of the crankshaft position sensor is the controller, which is present on the crankshaft pulley disk. The rubber damper, placed on the gear wheel of this controller, is capable of turning relative to the pulley.

It is necessary to find marks on the camshaft, flywheel. It must be remembered that the mark on the flywheel still duplicates the mark present on the crankshaft. The roller is installed correctly, which means that these marks will match.

How to check the sensors of an injection car to assess the suitability for the operation of the sensor responsible for mass flow air, the block of wires that fits it must be disconnected. Now we measure the resistance between the output according to the indicated control system diagram. Usually, this figure does not exceed the value of 6 kOhm.

You can remove the sensor from a running engine. The engine will not slow down less than 1500 rpm. There is also a sign of a malfunction of such a sensor - unstable engine operation, difficult starting of the power unit, jumps, delays, dips during movement, traction and power are insufficient.

In order to assess the health of the speed sensor, you should switch to neutral gear when the machine is idling. If the sensor is working, then the speed will increase slightly. On some vehicles, faulty sensor the speedometer stops working.

How to check the sensors of an injection car - to check the sensor responsible for the temperature of the coolant, you should find a special table in the documentation. Any change in temperature in this system must be accompanied by deviations in the resistance of the sensor.

We check the oxygen sensor by measuring the resistance of the heater, having previously disconnected the connector from it. The result varies from 0.5 ohms, the limit is 10 ohms, it all depends on the device model. More detailed information is recorded in the instructions. To check, remove the connector from the sensor, turn on the ignition, check the reference voltage of the present controller, its parameter is 0.45 V.

How to check the sensors of an injection car - difficult? Then to the car service!

We watch the video - how to change the phase sensor on the Lada Kalina on an eight-valve engine

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The health of the anti-lock brake system is the basis for safe driving, especially in difficult traffic conditions. If in the course of management vehicle the ABS malfunction indicator light on the dashboard lights up, you should immediately take measures to eliminate it.

Even if one of the ABS sensors does not work correctly, this leads to a complete failure of the anti-lock braking, traction control systems, and a malfunction of the stability control system, if they are installed on the car.

ABS Diagnostics

Before proceeding to check the ABS sensor, you should determine which one does not transmit a signal. The easiest way to do this is with the help of computer diagnostics.

For cars after the 2000s, this is not difficult. clearly determine which of them does not provide information about the state of rotational movement of the wheel.

But far from always this information indicates a malfunction of the sensor itself. On the contrary, as a rule, the ABS sensor itself is working, and the fault lies in the wiring going to it or the wheel rotation reader.

The principle of operation of the ABS sensor

The ABS sensor is electromagnetic. That is, an inductance and a magnetic core are built into it, which respond to a signal received when the wheels rotate.

Experienced car enthusiasts know that when braking on a slippery road, the brake pedal should be pressed intermittently to prevent the wheels from locking, therefore, which can lead to uncontrollability of the car.

In principle, this function is performed by the ABS unit. It prevents the wheels from locking up. If the diagnostics showed a malfunction of the ABS sensor, you should first make sure that it is working.

Specifically, computer diagnostics can show “open or short circuit” or “no signal” malfunctions. In both cases, the ABS sensor may be to blame.

How to test the ABS sensor for operability with a tester

Its performance can be checked with a multimeter. To do this, you need to put the multimeter in the "diode" position. Why? Most ABS sensors in the circuit are protected by a diode in series with the circuit. That is, a simple call can lead to incorrect information.

It must be "ringed" in both directions. Typically, the resistance of an ABS sensor ranges from a few hundred ohms to 2 kilo ohms.

However, the continuity of the sensor directly from its connector does not give complete information about the passage of its signal to the ABS unit.

In many cases, the damage has a cable connecting the sensor connector to the ABS unit. Such malfunctions are especially common for rear wheel ABS sensors, since the cable length can be more than 3 meters, and manufacturers do not always correctly design its routing.

In the process of repairing ABS systems, there are cases of up to three fractures or rubbing of the cables of the sensors of the anti-lock braking system.

In order to check the sensor from the ABS control unit, you need to find the pinout (connection) of the connector in reference books or on the Internet. Next, disconnect the connector from the block and ring the ABS sensors directly from the connector pins, as shown in the example:

We remind you once again that the type of ABS connector and sensor contacts for each car model will be different, reference data should be used. On ABS blocks (they are easy to find under the hood by a large number of brake pipes suitable for them), their classification is usually applied, for example BOSCH 5.2.

If, as a result of checking with a multimeter, the ABS sensor rings in one or both directions, this is not yet evidence of its serviceability.

Structurally, it is made in the form of an inductor placed in a magnetic core. The coil has a large number of(up to several thousand) turns of very thin insulated wire.

Moisture often gets inside the sensor, and this is very likely, since it is located in the most corrosive zone in the immediate vicinity of the wheels. Water, especially saline, can cause turn-to-turn faults. In this case, the winding resistance will change slightly, but the quality factor drops tenfold. This leads to a decrease in the signal level of the ABS sensor and its inoperability.

Very often during operation, especially after replacing the elements of the hub, wheels, the ABS malfunction light starts to burn. Absence of an ABS sensor signal, for example, the right front wheel.

The owner replaces it based on the diagnostic readings, but the ABS system still remains faulty. Sometimes, after the error is removed by the scanner, the malfunction lamp goes out, but it is worth driving a few hundred meters, making a couple of brakings, and it lights up again.

It's not about the sensor, it's about design features signal generation (induction) of the wheel rotation sensor.

Design features

The figure above showed the case when a comb ring located on the hub is used as an inducing element. The end face of the sensor is in close proximity to the comb made of soft magnetic material. The gap distance is usually 0.2 to 0.8 millimeters.

Sometimes dirt, small pebbles get into the gap zone. This may cause the gap to increase (the sensor will be pushed off or its tip will be destroyed). The signal will drop dramatically. Sometimes even clogging of the comb leads to this.

That's why before replacing the sensor, clean the comb, preferably with thinner or diesel fuel (but not gasoline, this may cause a fire).

Then, using a feeler gauge, check the gap, it should be no more than 1 mm. If there is no set of probes, you can visually check for visible damage to its structural elements. For greater accuracy, you can compare with its elements of the opposite wheel.

If there is damage metal structure wheel combs, it should be replaced.

In some cars, the inducing element is made in the form of a rubber ring, in which magnetic inserts are mounted.

During the repair process, inexperienced mechanics, not realizing the purpose of these rings, simply do not wear them, which leads to a malfunction of the ABS system.

Currently, tapes consisting of micromagnetic elements are often used.

In the process of repairing the hub, this tape is sometimes damaged without even noticing it. In this case, the ABS sensor will also not work correctly.

When replacing the hub bearings, pay attention to whether there is an induction ring on it. The figure shows a bearing with a half-destroyed ring. On the surviving part, segments of magnetic elements are visible.

At self repair wheel hubs, be sure to pay attention to the structural elements located near the ABS sensors.

The proximity sensor or in English interpretation - Proximity Sensor - is responsible for a number of functions implemented in the HTC smartphone, and also affects the operation of some applications that use this sensor.

How can I tell if a sensor is not working or not functioning properly?

To do this, it is enough to observe when you put the phone to your ear in the mode of answering an incoming call - whether the screen goes out automatically or not. If not, then the proximity sensor is not working properly.

What to do in this case?

The causes of the problem may lie in the incorrect operation of the phone firmware (especially often this occurs when installing all kinds of unofficial (custom) firmware), but to fix it, it is not always necessary to update operating system Android. Often it is enough to calibrate only the Proximity Sensor itself. To do this, use the Sensor Box for Android application (to check the sensor), discussed earlier in the article, the backlight of the touch buttons does not work, as well as a special Proximity Recalibrator application (or its analogues) for its calibration.

How to test the proximity sensor

We connect the HTC smartphone to the Internet, go to the Play Market and download the Sensor Box for Android applications (how to install the application from the Play Market).
Launch the installed application and click on the button Proximity Sensor.
We check the operation of the proximity sensor by removing and bringing the hand or any other opaque object closer to the phone display. If the sensor is working properly, then the distance to the palm will change on the screen. Usually this sensor has only two values: maximum (a few centimeters) and minimum (zero).

How to calibrate the proximity sensor

If the sensor is not working, you need to download and install an application to calibrate it, such as Proximity Recalibrator.

Open the installed application.
We follow the instructions on the screen (it can be in English, but the pictures that duplicate the description are usually intuitive). After each step, click Next(next).
After completing the calibration, restart the smartphone.

*If the cause is not related to a physical malfunction of the proximity sensor, then after the above procedures, its operation, as a rule, is completely restored.

The braking system of modern cars is equipped with an anti-lock braking system, which reduces the braking distance and allows you to drive the car in the mode of sudden deceleration. To check the ABS sensor, you can use a tester, an oscilloscope, or perform diagnostics without instruments.

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Symptoms

To control the operation of the system, there is a light indicator of yellow or orange color. In a normal state, at the moment the ignition is turned on, a lamp is activated on the instrument cluster, then a self-diagnosis of the system elements is carried out and the icon automatically goes out.

Signs of breakdown of ABS system elements:

turning on the control lamp of the system on the go;
stable blocking of the wheels under heavy braking;
the absence of sounds indicating the operation of the ABS (vibration of the brake pedal);
appearance in memory electronic system ABS error codes.

If there are signs of a malfunction of the ABS, the operation of the car is prohibited. Brakes designed for joint work with an anti-lock braking system, when it is turned off, they do not work correctly.

Causes of malfunctions

In most cases, the reason for the incorrect operation of the ABS is the failure of one or more wheel sensors. On used vehicles, wiring harnesses can be destroyed. Because of this, the signal from the sensor becomes unstable and is fixed as an error. In addition, the cause is a voltage drop at the battery terminals - when it drops to 10.5 V, the anti-lock braking system can be turned off.

Sensor types

There are two types of sensors on cars:

passive sensor built on the basis of a coil;
an active sensor that uses the Hall effect in its work.

The passive sensor is activated after the start of movement and reads data from the geared impulse ring. The passage of a tooth past the device causes the generation of a current pulse, which is read by the control unit. The sensors start working at speeds above 5 km/h and do not respond to pollution.

The active sensor consists of electronic components and a permanent magnet that is mounted on the hub. When the magnet rotates in the device, a potential difference arises, which is formed into a microcircuit control signal. Then the information is fed to the block. Sensors of this design are rare, their repair is impossible.

ABS Diagnostics

Diagnostics of the ABS system is performed by connecting a scanner. On cars manufactured after 2000, an OBD scanner is used.

ABS self-diagnosis was filmed for the Renault Megan BortJournal channel.

Checking ABS sensors with a tester

The owner of the car can check the status of the sensors themselves. This will require a few minutes of time and a simple tester. In order to check the sensor with a multimeter, it is necessary to know the resistance value of a good coil. The measurement is made with the removal of the device or by disconnecting the plug connector.

Self-testing is carried out according to the algorithm:

Park the vehicle on a level surface or lift. Provide secure fixation from accidental start of movement.
For easier access to the sensor, it is recommended to remove the wheel.
The wire is laid along the wheel arch and connected to the common wiring using a plug, which must be carefully disconnected. If the plug is covered with a layer of dirt, then it must be removed and the connector pads wiped with a clean rag. If the rear wheel sensors are being tested, the connectors are located in the vehicle interior. To access the plug, you need to fold the seat cushion and bend the carpet. On some machines, you will need to fold back the soundproofing mats located under the carpet.
Switch the multimeter to ohmmeter mode.
Connect the sensor leads to the probes of the multimeter and measure the resistance. Compare the value with the standard values given in the instruction manual. If there is no such information, then the readings are taken from the reference literature. It is usually considered normal resistance in the range of 0.5-2 kOhm.
Ring the sensor wiring harness to check for a short circuit.
Check sensor operation. To do this, rotate the wheel and look at the ohmmeter readings. Depending on the speed of rotation, the resistance will change.
Translate measuring device to the "voltmeter" operating mode.
Rotate the wheel at a frequency of about 1 rpm, while checking the voltage value. According to the standards, it should be in the range of 0.25-0.5 Volts. As the RPM increases, the voltage increases.
Check all sensors according to the procedure described above. It must be remembered that the devices on the front and rear axles differ in design and have different resistance.

Measuring resistance with a multimeter

Based on a certain resistance value, we can conclude about the state of the sensor:

resistance below acceptable - sensor malfunction;
resistance is approaching or equal to zero - interturn short circuit in the sensor coil;
variable resistance that changes when the position of the wiring harness changes - wire breaks inside the cable;
the resistance value tends to infinity - breaks in the wiring or coil.

In the case when the resistance value of a working ABS sensor could not be found out, it is required to measure the remaining devices. A device with parameters that are noticeably different from the rest is most likely the cause of the ABS malfunction.

Additionally, you should check the integrity of the wiring harness from the sensor plug to the block on the control unit with a tester:

Disconnect connectors from sensors and control unit.
Find information about the pinout of the control unit plug. The pinout can be searched for by the model of the valve body, which is printed on the body identification plate.
Ring wiring harnesses.

How to check with an oscilloscope and an adapter

Checking with an oscilloscope allows you to more accurately test the sensor for performance. The oscilloscope shows graphs of the change in the signal generated by the device. The sensor may give pulses that comply with the standards, but the signal amplitude will be incorrect and will cause an ABS error. The check is carried out on the car, without removing the sensor.

In order to check the ABS sensor with an oscilloscope, you must:

Disconnect the sensor plug in the same way as the procedure used when measuring parameters with a tester.
Connect an oscilloscope or oscilloscope to the sensor pins.
Start rotating the hub through the wheel or by another method with a frequency of 2-3 rpm.
Fix the waveform of the signal.
Carry out a similar procedure with the sensor located on the other side of the axle.

The correctness of the sensor is indicated by:

identical amplitude of vibrations of signals from sensors located on the left and right sides of the same axis;
uniformity of the curve, without noticeable lateral deviations;
amplitude stability in height, which should not exceed 0.5 volts.

Another way to measure parameters is to connect a laptop equipped with a special adapter. The device connects to a USB port and sends signals to the appropriate software.

USB oscilloscope sample

The oscilloscope and adapter are highly specialized devices and are rare for personal use. The equipment is used in service stations.

Checking the sensor without instruments

The most rough way to check the health of the sensor is to test magnetic field generated when the device is running. To do this, a steel object is applied to the sensor, which should be attracted when the ignition is on.

Available visual inspection instrument for cracks in the case or noticeable breaks and oxidation on the wiring. It is recommended to inspect the plug and the condition of the contacts in it, oxidation is the reason for the deterioration of the signal conductivity.

How to fix problems

After checking the instruments and determining the faulty node, you can begin to repair. Some owners repair sensors by replacing the wiring harness or rewinding the coil.

Breakdown in the sensor

A defective passive type sensor can be repaired by yourself:

Remove the sensor from the hub. The fastening bolt often turns sour, so it should be unscrewed carefully. For removal, it is allowed to use liquid type WD40.
Remove the protective housing of the coil. Removal is done with a saw. The cut should be done very carefully so as not to damage the case and the winding.
Take off protective film from the winding, prying it with a sharp knife.
Carefully wind the wire off the reel. In the process of removal, the version of the broken conductor is confirmed. As a result, an empty ferrite core will remain, resembling a spool of thread in shape.
Wind up a new winding. As a conductor, copper wire from the coils of common relays of the RES-8 type can be used. Winding can be done with a drill with smooth speed control. Be careful, as breaking the wire returns you to the start of the job. It is recommended to wind the conductor up to the top level of the coil.
Check resistance. Most coils have a value in the range of 0.9-1.2 kOhm. For clarification, it is recommended to measure the parameter on a known good sensor located on the opposite side of the axle. Resistance adjustment is made by unwinding excess wire. If the reading is low, then you will need to use another wire or rewind. Secure the wire from self-dissolving with adhesive tape or other adhesive tape.
Solder wires to the terminals of the coil, which serve as a connection between the winding and the bundle. For terminals, it is recommended to use an insulated multi-core cable, which has increased strength.
Install the coil in the old housing. If it received significant damage during disassembly of the device, then the coil is filled with epoxy. For this, the part is located in a metal cup of a suitable size, for example, a case from a capacitor. The air gap between the coil and the glass is carefully filled with resin. When pouring, it is desirable to avoid large air voids. After the resin has completely cured, the body is removed.
Reinstall the sensor mount, fixing it with epoxy. Conduct a visual inspection of the product for cracks and voids in the insulation. Detected defects are filled with resin.
Place the repaired sensor in its original place and test the ABS system. When installing the device, it may be necessary to refine the resulting case, which is done with a file and sandpaper. The field-mounted sensor should have a gap between the coil and the gear ring within 0.9-1.1 mm. When the gap is reduced, it is recommended to bring it to the standard by installing gaskets.

It is necessary to drive the car for some time, checking the operation of the brakes at various speeds. There are times when the ABS spontaneously activates at certain wheel speeds - usually just before a stop. Then you will need to search for the gap by adjusting it with gaskets or undermining the sensor housing.

Another repair option is to install a modified crankshaft position sensor from domestic cars:

Remove the "native" sensor and modify the body of the "donor" part. Most often, this role is played by the DPKV from the ZMZ-406 engine, which has a resistance in the range of 800 ohms. When finalizing, one should strive to ensure that the core with the wound coil and the gear ring mounted on the axis are parallel. The gap between the sensor and the ring should be within 0.2-0.3 mm.
Test the operation of the device. On some Japanese-made cars, the ABS light may come on intermittently. The situation is corrected by changing the connection of the harness contacts.

Both options for repairing the sensor require the owner to be persevering and able to work with various tools. If the car user doubts his abilities, it is recommended to purchase a new device or find a product at a car disassembly.

Wiring problem

If the problem of the loss of sensor performance lies in the wiring, then it can be replaced:

Unscrew the sensor mounting to the wheel hub.
Disconnect the wire plug.
Remove the sensor along with the wire. In this case, it will be necessary to dismantle the mounting brackets installed on the wiring.
Make measurements of the installation distances of the brackets. It is recommended to draw a diagram and photograph the factory location of the fasteners.
Cut off the sensor from the wire, leaving a margin for soldering.
Check the integrity of the cable remaining on the sensor. If the site is intact, then you can proceed with the installation of a new wiring segment.
Remove all protective covers and fasteners from the old cable.
Choose a wire that is suitable for the outer diameter and cross section.
Install the previously removed protection and fastening elements on the new harness. To facilitate assembly, it is recommended to use a soapy solution.
Solder the sensor and plug in place.
Carefully isolate the junction. The accuracy of work and the service life of the repaired part depend on the tightness of the connection.
Install the sensor in place, check the operability of the ABS system, make sure that there are no errors during operation.

Video "Checking ABS sensors"

Checking ABS sensors is demonstrated in a video provided by the 1000 DIY and Tips channel.

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