Daewoo Nexia DIY speed sensor repair

In detail: Daewoo Nexia DIY speed sensor repair from a real master for the site my.housecope.com.

We demonstrate the progress of work on removing, replacing and repairing the speed sensor in a Daewoo Nexia car (Daewoo Nexia) with our own hands. How to understand that the speed sensor is faulty. The main symptoms: when the gas is thrown off, when, for example, the gearbox is shifted to neutral, after acceleration, the rpm becomes around 500 or even less, there is a slight vibration, as if the engine is about to stall. After that, the motor returns to normal idle speed, you can turn on the gears or make a stop.

In our case, no particular importance was attached to this at first, until this problem worsened and became annoying. Initial diagnostics did not reveal the reason for this behavior of the machine. For good luck, the injectors, the throttle valve and the idle speed regulator were washed. But nothing helped, the error scanner did not see it. It turned out to be due to the fact that the diagnostic device was connected on a standing car, and it was necessary to do this while on the move. As a result of the experiment, a damaged speed sensor was found that could be repaired, in your case it may need to be replaced.

To repair the speed sensor, you will need a soldering iron, rosin and soldering acid:

And also possibly new wires to it.

Video of repair and replacement of the speed sensor in Daewoo Nexia:

A video backup of the speed sensor repair in Daewoo Nexia:

Video (click to play).

* Daewoo Nexia speed sensor repair *

in my opinion it would be better to use not cold welding but heat shrinkage.

Well done guys, and sometimes my speed drops sharply, I need to look at this sensor that I have there. I'm waiting for the video, you show and tell everything clearly, a lot of your video helped me continue in the same spirit BEAUTY.

Where is it possible to download such a program and buy a cable for a computer?

And why the connector for the ecu is in another place. They also altered it themselves.

The f16d3 has an electronic speedometer, and the sensor is located on the left front wheel. When you were driving in gear without pressing the gas, it felt like the cruise control was working - it keeps 2000 rpm. when stopping at a traffic light, the revolutions jumped to 3000. the wiring also fell off. soldered and everything is ok. And I saw a drop in revolutions when braking in neutral when I drove 95 for a long time, and then returned to 92. In a day, this phenomenon disappeared. These are the observations.

Guys, you can read more about the diagnostic lace. I have the same ECU!

The speed sensor plays an important role in the vehicle control system. A faulty sensor largely interferes with the correct function of the car. Consider the device and the principle of operation of the speed sensor for self-diagnostics.

Earlier models of cars equipped with a propulsion system with a carburetor were equipped with a speedometer with a mechanical drive. The control and measuring device drive was located in the gearbox housing. The analyzer readings were fed to the instrument located in the dashboard through a rotating conductor. In the course of the development of the automotive industry, vehicles have become increasingly equipped with injectors. This design of the car implies the installation of electronic speedometers. The electronic speedometer receives a signal from the sensors and transmits it to the car's dashboard. Modern speed sensors differ in many respects from their earlier counterparts and function according to the Hall effect principle.

On modern Daewoo cars, the speed sensor transmits a signal to the electronic control unit. The transmitted signal has the form of a variable voltage, which is converted into the required speed parameters - kilometers per hour.

Before proceeding with diagnostics and replacement of the speed analyzer, it is necessary to clarify the position of the device. The position of the sensor in the vehicle system can be found in the manufacturer's accessory instructions. The control unit in Daewoo Nexia is located behind the interior trim panel (on the right side). As you know, the control unit is one of the most important components of the fuel supply system. The electronic control unit receives a signal from all kinds of car sensors and monitors the most important aggregates and components of the car's propulsion system. Also, one of the most important functions of the electronic control unit is to supply the sensors with the necessary electricity and control the constant voltage. The DS itself in a Daewoo car includes a holder, a rotor and a sensitive analyzer element. Such a device has a speed sensor located on the front wheels of the vehicle. The analyzer located on the rear axle of the vehicle has several characteristic differences. The rear axle DS consists of the following components: fasteners, rotor, sealing element and analyzer.

The main functions of the speed sensor:

Transfer of indicators to the speedometer.
Transmission of signals to the electronic control unit to maintain torque.

Primary diagnostics of the speed sensor malfunctioning is carried out by the on-board computer of the vehicle. In this case, the on-board computer may issue several error codes. Each code corresponds to a certain type of analyzer malfunction. To diagnose the device using an on-board computer, you must follow the manufacturer's instructions.

The most common are signals about the following device errors:

Completely missing analyzer signal.
Variable or intermittent speed sensor signal.
Incorrect operation of the control device broadcasting the speed on the dashboard of the car.
Incorrect engine operation at low speeds. Self-shutdown of the engine idling.
Increased fuel consumption.
Decreased engine power and productivity.

These factors can also indicate a malfunction of other vehicle systems, for example, the fuel system. But, in the event of the indicated malfunctions and a simultaneous error of the on-board computer, it is necessary to quickly start diagnosing the speed sensor. In order to diagnose the speed analyzer, you need to remove the sensor and the gear rotor. First, you need to carry out a visual diagnosis of the element. If mechanical damage was found on the analyzer's surface, the device must be replaced. Also, the sensor requires replacement in case of violation of the pole part of the element.

After the stage of visual diagnostics, it is necessary to check the resistance between the analyzer contacts. If the sensor is fully operational, the resistance on the front axle should be in the range from 900 to 1000 ohms. On the rear axle, the resistance of a good sensor is in the range from 1300 to 2100 ohms. The resistance at the sensor body is 100 kΩ. In the case of other indicators of the control and measuring device, the Daewoo sensor must be replaced. If during visual diagnostics, significant damage to the housing is found, the analyzer must also be replaced with a new one.

During the operation of the vehicle, the speed analyzer transmits the frequency and impulse to the controller. The signal frequency is in direct proportion to the vehicle speed. The control system uses the received signal to monitor the idling of the propulsion system. The electronic control unit performs this function by adjusting the idle speed and controlling the air supply around the throttle.

If the diagnostics indicated the need to replace the sensor, you need to familiarize yourself with the analyzers that are suitable for installation on your car. To do this, you must refer to the appropriate section of the manufacturer's instructions. Every motorist will be able to replace the sensor with his own hands without a lot of money and time. At the same time, this service in a specialized service will cost several times more. In order to replace the Daewoo analyzer with your own hands, you need to find out its location in the manufacturer's instructions. You also need to purchase a new sensor and prepare the appropriate tools.

1. Before starting the replacement, you need to wait for the engine temperature to return to normal. To do this, it is better to open the hood. Also, a prerequisite for the performance of work is the availability of sufficient lighting.

2. After the car engine has cooled down, it is necessary to de-energize the on-board network of the car.

3. The next step after disconnecting the battery is to find the speed sensor and clean the adjacent surface from excess dirt.

4. Next, release the sensor wires and remove the contact group. To do this, you need to squeeze the retainer.

5. The next step is to unscrew the speed sensor counterclockwise using the appropriate key.

6. After dismantling the summer cottage, it is necessary to diagnose its drive. If the stem is damaged, the entire actuator must be dismantled.

7. After dismantling the drive, check the condition of the O-rings. If during the operation of the vehicle the O-ring has worn out orderly, then it is recommended to replace it. After that, we install a serviceable rod and assemble the drive in the reverse order.

8. Now you can start installing the new speed sensor. To do this, gently rotate it clockwise without damaging the product body. During work, carefully follow all safety measures.

9.After the new sensor is installed in the required position, it is required to connect the contacts. The contacts must be connected very carefully, since if connected incorrectly, the device will not function correctly.

The speed sensor Nexia, despite its small size, is a very important vehicle device. In the event of a violation of its function, it is imperative to start diagnostics. Replacing the sensor with your own hands will allow you to restore the machine's performance, saving on the services of professional workshops. When carrying out work, use only approved tools in order not to damage the fragile structure of the sensor. Before purchasing a device for subsequent replacement, carefully read the manufacturer's instructions.

Nexia is a repairable vehicle that can be serviced independently. Almost every Nexia owner will be able to perform the following repair operations himself:

Unloading the contact group of the ignition lock. The contact group is one of the main "sores" of Nexia, due to which, at the wrong moment, the Nexia can stop starting. Fortunately, this problem can be easily solved - with the help of a conventional relay, we unload the contact group, and this problem is permanently solved!

Replacing the front and rear wheel bearings. Hub bearings wear out on any vehicle and may need to be replaced over time. Replacing bearings is not very difficult thanks to the included instructions.

FOR YOUR CONVENIENCE in the column on the LEFT there is an index according to the materials of THIS SECTION - you will find all the information you need! Nexia self-repair results As already mentioned, Nexia, unlike most foreign cars, is very maintainable, and almost everyone can replace individual components and parts. Well, of course, by doing the repairs yourself, you will save a lot of money, which you can then spend on more useful things.Daewoo Nexia speed sensor repair
The symptoms of a car problem are as follows!
When throttle is released, for example, when, after accelerating the gearbox, put on the neutral position, the revolutions are underestimated in the region of 500 or slightly less. At this moment, a certain short-term vibration occurs (it feels like the motor might just stall).
Then the engine goes to normal idle speed and you can switch to gear or just stop.
At first, no particular importance was given to this. But after a while, it became a problem!
Flushing the nozzles, throttle assembly and IAC (although they were contaminated) did not help us in this case. Connecting the diagnostics on a standing car, no defects were found in the work.
But we decided to check everything the same on a moving car!
After the checks, a defect in the operation of the speed sensor was found. Since the electronic control unit could not receive data from the speed sensor due to the breakage of two wires, the transient modes of engine operation were not carried out in standard modes.
Video Repair of speed sensor Daewoo Nexia channel GARAj Alex FierroDifficulty level: 2.
Lead time: 0.5 hours.
Withdrawal:1. Place the vehicle securely on a level surface (see “Standard Operations”).2. Disconnect the cable from the negative terminal of the storage battery (see “Standard Operations”).3. Using sliding pliers, loosen the tightening of the union nut securing the speedometer drive cable and unscrew it (see "Speedometer drive cable - removal and installation" p. 3).4. Disconnect the speedometer drive cable from the speed sensor.5. Pressing the locking plate, disconnect the speed sensor connector.6. Using a 24-hour open-end wrench, unscrew the speed sensor installed on the gearbox speedometer drive.Install the parts removed during disassembly in the reverse order.The main task of the vehicle speed sensor (DSA) is to send a pulse frequency signal to the controller. This signal frequency is identical to the vehicle speed. The controller, in turn, uses this signal to idle the engine and, through the idle speed regulator, controls the air supply bypassing the throttle valve.The DSA emits about 6000 impulses for every kilometer of the vehicle's path. In time intervals between pulses, the controller determines the vehicle speed. In addition, this signal is sent to the instrument panel, or rather, to the speedometer itself.How to determine that this sensor is faulty or in a critical condition:

Incorrect data on the speedometer. When driving at 20 km / h, the arrow is 80? The speed sensor does not give an impulse correctly and, most likely, it is necessary to diagnose or replace it.

Turning off the engine when driving at idle speed. It also often happens that if the DSA fails, the car "stalls" when switching a gearbox or while coasting.

Usually, on all Daewoo Nexia car models, the DSA is located in the gearbox (gearbox) on the speedometer drive mechanism. In the event of a speed sensor malfunction, the "CHECK ENGINE" lamp on the Daewoo Nexia, as a rule, comes on, thus indicating the need for diagnostics. Usually, with such symptoms as the "CHECK ENGINE" lamp, shutdown of the car at idle and incorrect readings of the speedometer needle, determine the performance of the sensor.It is necessary to remove the speed sensor with the ignition off, after disconnecting the connector and disconnecting the DSA from the speedometer drive. As a rule, by its appearance and determine its condition.Install the same sensor on the Nexia in reverse order. According to the description, everything seems to be simple. But do not forget where exactly the speed sensor and speedometer drive are located.Before you get them, you need to remove and disassemble the gearbox. But, again, it is better to do a similar procedure at a service station, where mechanics will make a similar procedure many times better.Daewoo Nexia belongs to the middle class cars. He began his history in 1984. Only then it was called Opel Kadett. When the German manufacturer took the car out of production in 1991, the license for its production was bought by Daewoo Motors. The car underwent a deep restyling and in 1994 appeared on the South Korean market under the name Daewoo Racer, and a little later began to be sold around the world as Daewoo Nexia. It was discontinued in South Korea in 1997, but production continued in Vietnam, Egypt, Romania and Uzbekistan. Moreover, in the last of the above countries, the production of the car continues today.At different times, various engines were installed on the car. In total, during the production of the car, four different types of engine were provided for it - their indices F16D3, A15SMS, A15MF, and also G15mMF.Based on the type of motors used, various speedometers were installed on the cars. For A15MF, G15mMF engines, a mechanically driven speedometer was used, which was equipped with a special cable. On more modern engines F16D3 and A15SMS, the vehicle speed data was transmitted to the device from the speed sensor.However, in both the first and second options, there are some design flaws that can appear during long-term operation of the car and cause a malfunction.Depending on the type of drive, each type of Daewoo Nexia speedometer has its own malfunctions.For a speedometer with a cable drive, the main malfunction is the destruction of the cable ends, made of plastic and having the shape of a tetrahedron. During operation, their edges are erased and cease to transmit torque to the speedometer.In order to confirm or deny this malfunction, it is imperative to dismantle the instrument panel. After that, it is necessary to unscrew the union nut, with which the cable is attached to the speedometer, which, in turn, makes it possible to assess the condition of the cable tip.If the tip is in good condition on the side of the instrument panel, the only option for checking is to drive a certain distance - approximately 5-6 meters, while holding the speedometer cable with your hand. Image - Daewoo Nexia DIY speed sensor repair

Removing the instrument panel on the Daewoo Nexia

If the torque is not transmitted from the gearbox to the cable, it means that the tip has failed on the other side.

In this case, it is necessary to perform the following actions - open the hood and unscrew the union nut, with the help of which the cable is attached directly to the gearbox, which serves as a conductor, with the help of which the torque generated on the secondary shaft of the gearbox is taken off. This part is located in a hard-to-reach place, since the tanks of the cooling system and the hydraulic booster are closely located nearby, which will need to be dismantled.

In this place, there may be one of the following malfunctions - the teeth of the plastic gear of the reducer were cut off, wear or destruction of the cable tip, a loose union nut that fixes the cable.

Newer Daewoo Nexia, equipped with F16D3 and A15SMS engines, are equipped with an electronic speedometer. To obtain information about the speed of the vehicle, the data that is transmitted to it comes from a special speed sensor. Its work is reduced to the transmission in real time of information about the frequency of rotation of the gearbox shaft, which is processed by the electronic control unit.

Daewoo Nexia speed sensor

As a result of the modernization, the durability of the Daewoo Nexia speedometer has improved. However, mechanical damage was replaced by electronics problems. A typical malfunction for these models is the malfunction of the speed sensor, which occurs due to its depressurization and subsequent ingress of liquid into the interior.

The performance check of the sensor, which shows the speed, is carried out using an electric drill or screwdriver. To do this, dismantle it and rotate the shaft using the above tools. The easiest way to check the speed sensor is to use household tools - a screwdriver or, alternatively, a drill. To do this, it is dismantled from the installation site and without disconnecting the block with wires. If it rotates, the speedometer shows the speed, and the sensor is in good condition. Otherwise, it will be necessary to check the integrity of the plastic gears, which serve to transmit torque to the drive shaft used by the speed sensor.

In addition, other reasons can serve as a malfunction of the speedometer. One of the most common is the oxidation of various contacts in the wiring, which disrupts the order in which information is transmitted from the speed sensor and distorts the speedometer readings and much more.

Checking the health and replacing the vehicle speed sensor (VSS)The VSS is mounted on the transmission case and is a variable reluctance sensor that starts generating voltage pulses as soon as the vehicle speed exceeds 4.8 km / h (3 mph). The pulses from the sensor are sent to the PCM and are used by the module when controlling the duration of the opening of the fuel injection injectors and shifting the transmission. On models with manual transmission, one VSS is used, on models equipped with AT, there are two speed sensors: one is connected to the secondary shaft of the gearbox, the second is connected to the intermediate shaft, and the failure of any of them leads to problems with shifting the transmission.1. Disconnect the sensor harness connector. Use a voltmeter to measure the voltage at the connector (harness side). The positive probe of the voltmeter should be connected to the terminal of the black-yellow wire, the negative one to ground. Battery voltage must be present at the connector.If power is not available, check the condition of the VSS wiring between the sensor and the fuse box (left under the dash). Also make sure that the fuse itself is in good working order. Use an ohmmeter to check for continuity between the black wire terminal of the connector and ground. If there is no conductivity, check the condition of the black wire and the quality of its terminal connections.
2. Jack up the front of the vehicle and place it on the supports. Support the rear wheels with wheel chocks and place the transmission in neutral. Connect the electrical wiring to the VSS, turn on the ignition (do not start the engine) and test the signal (blue-white) wire terminal on the back of the connector with a voltmeter (connect the negative probe to body ground). Keeping one of the front wheels stationary,
manually rotate the opposite, - the voltage should fluctuate between zero and 5V, otherwise replace VSS.3. Disconnect the wiring harness from the appropriate speed sensor. Using an ohmmeter, measure the resistance between the two terminals of the sensor. The nominal value is approximately 400 ÷ 600 Ohm, otherwise replace the sensor. The Daewoo Nexia speed sensor sends an AC voltage signal to the electronic control unit (ECU), as a result of which it is converted into speed in units of km / h. The Daewoo Nexia speed sensor can be replaced with sensors numbered 96213551, 96213552, “NG”.The vehicle's electronic control unit is located behind the upholstery panel in the passenger compartment on the right-hand side. It is one of the important elements of the fuel injection system. The ECU receives signals from various sensors and controls the systems and components of the engine. The ECU supplies power to the sensors and switches with a constant voltage of 5, 12 V.The Daewoo Nexia speed sensor on the front wheels consists of a bracket, a rotor, and a sensor sensor. On the rear wheels, it consists of a bracket, a rotor, a seal and a sensor element. To check the speed sensor for the Daewoo Nexia, remove the sensor and the gear rotor. If damage is found on the pole piece of the sensor, it must be replaced.Then the resistance between the sensor leads is checked. It should be 900-1100 ohms for the front wheels and 1300-2100 ohms for the rear. And the resistance of the sensor to the case should be 100 kOhm. With other indicators, it is necessary to replace the speed sensor of the Daewoo Nexia. It should also be replaced if there is visible damage. For example, if the rotor teeth are broken.The vehicle speed sensor sends a pulse-frequency signal to the controller. The signal frequency is directly proportional to the vehicle speed. The signal is used by the controller to control the engine idling and by means of the idle speed regulator controls the air supply bypassing the throttle valve.The vehicle speed sensor has approximately 6004 pulses per kilometer. The controller determines the vehicle speed by the time interval between pulses. The signal can also be used by the speedometer installed on the instrument panel. Remove the speed sensor of the device after disconnecting the connector of the speedometer drive cable. Installation is carried out in the reverse order.Daewoo Nexia 2008. REMOVING THE SPEED SENSOR OF THE ENGINE F16D3, A15SMS OF THE VEHICLE AND ITS DRIVE We remove the vehicle speed sensor and its drive for replacement, as well as when repairing the gearbox.The location of the vehicle speed sensor on the gearbox.Ignition OFF, squeeze the engine control system wiring harness retainer.Using the “27” wrench, rotate the sensor by the hexagon counterclockwise and unscrew it from the sensor drive housing.Using the "10" key, unscrew the bolt securing the speed sensor drive.... and remove the drive from the clutch housing.The drive housing is sealed in the clutch housing with a rubber ring.If the ring is damaged (breaks, cracks), remove it from the groove of the drive housing and replace it with a new one.Install the drive and speed sensor in reverse order.In this case, the shank of the sensor must enter the hole in the drive shaft. Image - Daewoo Nexia DIY speed sensor repair

Depending on the year of manufacture, Daewoo Nexia passenger cars operating in our country can have four engines, which are assigned indices: F16D3, A15SMS, A15MF, G15mMF. Depending on the engine index on your Daewoo Nexia car, it will depend on what type of speedometer is installed on it. When installing engines with indexes F16D3 and A15SMS, the speedometer receives information about the vehicle speed from the speed sensor, and when installing engines with indexes A15MF and G15MF, the speedometer will be mechanical with a cable drive.

The main malfunctions leading to the failure of cable-driven speedometers is the failure of the four-sided plastic cable ends, whose edges are gradually erased and they stop transmitting torque. In order to clarify the picture of the malfunction, you will have to remove the instrument panel, unscrew the union nut securing the cable to the speedometer and see the condition of the cable tip. If on this side of the cable the tip is intact, then you will have to start the car and drive 5-6 meters, holding the speedometer drive cable with your hand and thereby checking the rotation of the cable.

If the cable does not rotate, then to eliminate the malfunction you will have to open the hood and unscrew the union nut securing the cable to the gearbox, with which the torque is removed from the secondary shaft of the gearbox. True, it is quite difficult to get to this place, since the expansion tank of the engine cooling system and the power steering tank are in the way. Therefore, to facilitate access to this place, they will have to be removed.

Possible malfunctions in this place can be: unscrewed or not fully tightened union nut; the tip of the cable is worn out or broken; cutting the teeth of the plastic gears of the gearbox.

On Daewoo Nexia cars with engine indexes F16D3, A15SMS, an electronic speedometer is installed, in which the deviation of the arrow showing the vehicle speed will depend on the readings of the speed sensor, which resets the information about the speed of the gearbox output shaft to the electronic control unit. The main malfunction of such a speedometer is the failure of the speed sensor as a result of its depressurization and ingress of water.

The speed sensor can be checked with a drill or screwdriver. To do this, remove it from the installation site and, without disconnecting the block with wires, turn the sensor shaft with the above tools. If, during the rotation of the shaft, the speedometer shows the speed, then this sensor is working. Then you will have to check the integrity of the plastic gears of the gearbox, with the help of which the torque is transmitted to the drive shaft of the speed sensor.

Daewoo Nexia speed sensor repair
The symptoms of a car problem are as follows!
When throttle is released, for example, when, after accelerating the gearbox, put on the neutral position, the revolutions are underestimated in the region of 500 or slightly less. At this moment, a certain short-term vibration occurs (it feels like the motor might just stall).
Then the engine goes to normal idle speed and you can switch to gear or just stop.
At first, no particular importance was given to this. But after a while, it became a problem!
Flushing the nozzles, throttle assembly and IAC (although they were contaminated) did not help us in this case. Connecting the diagnostics on a standing car, no defects were found in the work.
But we decided to check everything the same on a moving car!
After the checks, a defect in the operation of the speed sensor was found. Since the electronic control unit could not receive data from the speed sensor due to the breakage of two wires, the transient modes of engine operation were not carried out in standard modes.
A homemade winder assembled from a conventional speed sensor, the motor is taken from the headlight corrector 3110-31105, the board with the reading element and the magnet are removed from the purchased speed sensor.Timing replacement Daewoo Nexia. Do we know whether the valve bends on this engine?Hello everyone! I think everyone has ever had that finances sing romances, but you need to travel)) here's an easy way to save money)Sorry for the sound quality, I didn't have time to buy a microphone.The speed sensor plays an important role in the vehicle control system. A faulty sensor largely interferes with the correct function of the car. Consider the device and the principle of operation of the speed sensor for self-diagnostics.Earlier models of cars equipped with a propulsion system with a carburetor were equipped with a speedometer with a mechanical drive. The control and measuring device drive was located in the gearbox housing. The analyzer readings were fed to the instrument located in the dashboard through a rotating conductor. In the course of the development of the automotive industry, vehicles have become increasingly equipped with injectors. This design of the car implies the installation of electronic speedometers. The electronic speedometer receives a signal from the sensors and transmits it to the car's dashboard. Modern speed sensors differ in many respects from their earlier counterparts and function according to the Hall effect principle.On modern Daewoo cars, the speed sensor transmits a signal to the electronic control unit. The transmitted signal has the form of a variable voltage, which is converted into the required speed parameters - kilometers per hour.Before proceeding with diagnostics and replacement of the speed analyzer, it is necessary to clarify the position of the device. The position of the sensor in the vehicle system can be found in the manufacturer's accessory instructions. The control unit in Daewoo Nexia is located behind the interior trim panel (on the right side). As you know, the control unit is one of the most important components of the fuel supply system. The electronic control unit receives a signal from all kinds of car sensors and monitors the most important assemblies and components of the car's propulsion system. Also, one of the most important functions of the electronic control unit is to supply the sensors with the necessary electricity and control the constant voltage. The DS itself in a Daewoo car includes a holder, a rotor and a sensitive analyzer element. Such a device has a speed sensor located on the front wheels of the vehicle. The analyzer located on the rear axle of the vehicle has several characteristic differences. The rear axle DS consists of the following components: fasteners, rotor, sealing element and analyzer.
The main functions of the speed sensor:

Transfer of indicators to the speedometer.

Transmission of signals to the electronic control unit to maintain torque.

For the correct performance of the main tasks of the analyzer, it is connected to the controller and the indicator instrument through a block in the motor system. There is a fuse in the electrical circuit of the speed sensor, which is located in the vehicle cab on the heater radiator controller.Primary diagnostics of the speed sensor malfunctioning is carried out by the on-board computer of the vehicle. In this case, the on-board computer may issue several error codes. Each code corresponds to a certain type of analyzer malfunction.To diagnose the device using an on-board computer, you must follow the manufacturer's instructions.The most common are signals about the following device errors:

Completely missing analyzer signal.

Variable or intermittent speed sensor signal.

Incorrect operation of the control device broadcasting the speed on the dashboard of the car.

Incorrect engine operation at low speeds. Self-shutdown of the engine idling.

Increased fuel consumption.

Decreased engine power and productivity.

When the above errors appear, it is necessary to start diagnosing the electrical circuit of the engine. In frequent cases, the reason for the refusal is the oxidation of the contacts. Also, checking and replacing the sensor may be necessary if several symptoms occur at once.These factors can also indicate a malfunction of other vehicle systems, for example, the fuel system. But, in the event of the indicated malfunctions and a simultaneous error of the on-board computer, it is necessary to quickly start diagnosing the speed sensor. In order to diagnose the speed analyzer, you need to remove the sensor and the gear rotor. First, you need to carry out a visual diagnosis of the element. If mechanical damage was found on the analyzer's surface, the device must be replaced. Also, the sensor requires replacement in case of violation of the pole part of the element.
After the stage of visual diagnostics, it is necessary to check the resistance between the analyzer contacts. If the sensor is fully operational, the resistance on the front axle should be in the range from 900 to 1000 ohms. On the rear axle, the resistance of a good sensor is in the range from 1300 to 2100 ohms. The resistance at the sensor body is 100 kOhm. In the case of other indicators of the control and measuring device, the Daewoo sensor must be replaced. If during visual diagnostics, significant damage to the housing is found, the analyzer must also be replaced with a new one.
During the operation of the vehicle, the speed analyzer transmits the frequency and impulse to the controller. The signal frequency is in direct proportion to the vehicle speed. The control system uses the received signal to monitor the idling of the propulsion system. The electronic control unit performs this function by adjusting the idle speed and controlling the air supply around the throttle.If the diagnostics indicated the need to replace the sensor, you need to familiarize yourself with the analyzers that are suitable for installation on your car. To do this, you must refer to the appropriate section of the manufacturer's instructions. Every motorist will be able to replace the sensor with his own hands without a lot of money and time. At the same time, this service in a specialized service will cost several times more. In order to replace the Daewoo analyzer with your own hands, you need to find out its location in the manufacturer's instructions. You also need to purchase a new sensor and prepare the appropriate tools.
1. Before starting the replacement, you need to wait for the engine temperature to return to normal. To do this, it is better to open the hood. Also, a prerequisite for the performance of work is the availability of sufficient lighting.2. After the car engine has cooled down, it is necessary to de-energize the on-board network of the car.
3. The next step after disconnecting the battery is to find the speed sensor and clean the adjacent surface from excess dirt.
4. Next, release the sensor wires and remove the contact group. To do this, you need to squeeze the retainer.5.The next step is to start unscrewing the speed sensor counterclockwise using the appropriate key.
6. After dismantling the summer cottage, it is necessary to diagnose its drive. If the stem is damaged, the entire actuator must be dismantled.
7. After dismantling the drive, check the condition of the O-rings. If during the operation of the vehicle the O-ring has worn out orderly, then it is recommended to replace it. After that, we install a serviceable rod and assemble the drive in the reverse order.
8. Now you can start installing the new speed sensor. To do this, gently rotate it clockwise without damaging the product body. During work, carefully follow all safety measures.9. After the new sensor is installed in the required position, it is required to connect the contacts. The contacts must be connected very carefully, since if connected incorrectly, the device will not function correctly.The speed sensor Nexia, despite its small size, is a very important vehicle device. In the event of a violation of its function, it is imperative to start diagnostics. Replacing the sensor with your own hands will allow you to restore the machine's performance, saving on the services of professional workshops. When carrying out work, use only approved tools in order not to damage the fragile structure of the sensor. Before purchasing a device for subsequent replacement, carefully read the manufacturer's instructions.