Niva Chevrolet speedometer does not work
Modern cars have a large number of sensors that correct the operation of the car. And they are all very strongly interconnected. If the Chevrolet Niva speedometer does not work, then there may be several reasons for this, ranging from the speed sensor to the electronic control unit. This, in turn, can lead to improper engine operation, increased fuel consumption and other problems. Therefore, a non-functioning speedometer is not only a problem with traffic control, but also a possible cause of major malfunctions. This means that it is urgent to diagnose the car.
In the Niva Chevrolet, the speedometer needle is driven not by a cable, as on old cars, but by an electronic control system, which is controlled by a magnetic sensor. The speedometer needle is an ammeter driven by the difference in current transmitted by the sensor.
If, as a result of diagnostics, a problem is identified with the instrument panel, then in most cases it may require a complete replacement, since it is non-repairable and its components are located on one board.
The speed sensor transmitting the impulse to the instrument panel is installed on the transfer case. These signals are transmitted to the ECU, where they are processed, engine parameters are read and transmitted to the instrument panel.
It is quite simple to determine problems in the operation of the speedometer: these are inflated indicators, for example, when a car shows clearly inflated speed indicators, the needle twitches during uniform movement or does not rise from the zero mark.
There are several main reasons that can affect the operation of the speedometer:
- Mechanical damage to the instrument panel
- Damage to wiring or contacts
- Short circuit
- Speed sensor failure
- ECU failure
Some problems can be determined by connecting an OBDII sensor to the panel
If problems with the speedometer are accompanied by a Check Engine error, then in this case the problem will be related to the ECU. By checking it with a sensor, you can most likely detect error 0500.
First, you should conduct a self-diagnosis of the instrument panel. To do this you need to follow a few simple steps:
- Turn off the ignition and hold down the button to reset the daily mileage
- Hold the button to turn on the ignition
- Release the button
- If the instrument panel is working properly, then the instrument arrows should rise to the maximum division and return to their original position.
If the speedometer needle does not move or there are malfunctions in their operation, then the problem is in the instrument panel. You should disconnect it and check the condition of the contact blocks. It is possible that during operation due to vibrations, the contacts in the block became disconnected from the common bundle to the instrument panel.
Pin 9 is used to connect the speedometer. In some cases, for example, when repairing an instrument panel, it may be installed skewed, which may subsequently affect the operation of the system.
If these steps do not help, then you need to check the contact block on the speed sensor. To do this, you need to install the car on an inspection hole or overpass. It is located at the bottom of the transfer case and water and reagents used to treat roads can get on it.
After this, you need to check the wires leading from it to the speed sensor. The wire may fray or suffer other mechanical damage. The car body carries a negative charge - mass. And if the wire sheath is damaged, a short circuit may occur.
It is also necessary to pay attention to its condition. It is often made not only in a metal case, but also in a plastic one, which encloses a core with a winding and a rotor. Depending on the rotation speed, the level of current generated and, accordingly, the position of the speedometer needle depend.
This element is not repairable, since it is enclosed in a solid body. Therefore, if malfunctions occur, it must be replaced. You can check its performance using a multimeter. Before doing this, you need to remove it:
- The terminals are disconnected from the sensor
- The sensor is unscrewed
- An inspection and assessment of its condition is carried out.
- There are three terminals suitable for the sensor: minus, plus and central pulse. When checking, the multimeter is connected with a negative probe to ground, and a positive one to the central connector
- A tube is placed on the sensor roller and the multimeter is switched to minimum measurement mode
- Using the tube, the sensor rotates, and if it is working properly, the multimeter should show deviations from the rest state.
If the multimeter does not show the operation of the element being measured, it means that it is faulty and requires replacement.
Speedometer
Speedometer
Previously, we were accustomed to a speedometer that was driven by a flexible shaft - the speedometer shaft. It's completely different in the Audi 80: its speedometer is an electronic measuring device similar to a tachometer.
Just like a tachometer, it receives speed pulses - but not from the engine, but from a sensor in the gearbox. There the wheel speed is measured.
The device correlates the speed pulses with a time factor and thus obtains a reference value for speed.
- Due to the lack of a mechanical drive, the trip meter functions partially electrically: a so-called stepper motor rotates the drive shaft of the meter's transmission step by step further - depending on the number of revolution pulses.
- Advantages of an electronic speedometer: silent drive, more accurate indicators.
- If the speedometer does not work, you should first check the corresponding fuse in the fuse compartment.
- Speedometer pulse sensor
Also interesting: Disassembly and assembly of the Niva 2121, Niva 2131 gearbox
| On the left front of the gearbox we see the reverse light switch plug (1) and the speedometer pulse sensor (2). To remove the speedometer pulse sensor, after pressing the safety bracket, disconnect the plug (3), press down the latch (arrow), turn the pulse sensor and pull it out. |
The speedometer pulses come from the reed sensor on the left side of the gearbox. A reed switch is a hermetically sealed contact group located in a gas shell.
The contact closes if it is exposed to a magnetic field. In order for the reed switch to deliver pulses, it must close and open in rhythm with the rotation speed.
Therefore, the notched wheel rotating in front of the sensor influences the magnetic field acting on the contact group.
Checking the speedometer pulse sensor
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Removing the speedometer pulse generator
|
Why the Niva Chevrolet speedometer does not work: reasons and repairs
Modern cars are packed with sensors like a Christmas turkey with apples. Moreover, all or almost all sensors are interdependent. If the speedometer on our Niva Chevrolet does not work, it may happen that the electronic control unit also receives incorrect impulses. And this affects engine performance , gasoline consumption, and power. A non-working speedometer is not just an inconvenience, it is a reason to look at the reasons and restore the system’s functionality.
The video shows how the speedometer on a Niva Chevrolet can “glitch”:
Reasons for a non-working speedometer: from simple to complex
In the Niva Chevrolet, the speedometer needle is driven not by a cable and a magnetic device, as in classic VAZs, but by electronics. The speedometer itself, like the rest of the instruments on the panel, are nothing more than voltmeters or ammeters with different scales.
The speedometer receives an electrical impulse, and the needle is driven by a simple stepper electric motor.
This is for information, because it is useless to poke into the speedometer itself, it is not repairable and if at least one element fails, you have to buy the entire instrument panel on the circuit board.
The speedometer receives an impulse from the speed sensor, and it is installed on the transfer case housing. These impulses are also monitored by the electronic engine control unit and, receiving them, draws its conclusions about the operating mode of the motor.
The signs of a non-working speedometer are quite clear - the needle either lies shamelessly, showing 160 at a speed of 20 km/h, or twitches, or falls dead to the zero mark.
Since there are not many elements in the electrical circuit of the Chevrolet Niva speedometer, there are only a few reasons for the device not working:
- Mechanical damage to the speedometer itself.
- No contact in any of the terminal connections.
- Broken or shorted wire.
- Failure of the speed sensor.
- ECU malfunction.
Dashboard test and speedometer check
If the speedometer starts to work incorrectly and the Check Engine light comes on, then you should check the electronic control unit for errors.
If the ECU memory contains information about error 0500 , this indicates that something is wrong with the pulse coming from the speed sensor.
We’ll return to the sensor later, but for now we’ll check the entire dashboard for the functionality of each of the devices.
To do this, there is a panel self-diagnosis procedure. The verification process goes as follows:
- Turn off the ignition and press the daily mileage reset button.
- Do not release the button and turn on the ignition.
- Let's release the button.
- In this case, the arrows on working instruments should move three times from zero to the maximum division.
Everything is clear here - if the speedometer refuses to fulfill the test conditions, the problem is either in the device itself or in the tidy board. Most likely, you will have to change the board assembly.
Video about self-diagnosis
The video shows a VAZ-2112, but the principle is the same, and the panel is the same.
Checking the contacts of the speedometer and speed sensor
There are not many contact blocks in the speedometer circuit. It often happens that vibration causes the block moving from the common bundle of wires to the dashboard to move. To eliminate the possibility of losing contact in this place, you will have to move the device away and remove and insert the chip on the back of the panel board several times.
Pin No. 9 is the speedometer pin. Sometimes the block may simply be installed skewed , then the contact may be inconsistent or absent altogether.
The location of the speed sensor is schematic.
If this does not help, you will have to look for the contact connector on the speed sensor. As we said, it is located on the transfer case housing and its connectors often suffer from water and reagents that are sprinkled on the roads.
The contact needs to be disconnected and its condition assessed . In addition, the wires themselves that go to the speed sensor often come under attack. On a Chevrolet Niva with high mileage, the wire can easily fray, and if at least one of the three wires is damaged or shorted to ground, the speedometer will not work.
And the location of the sensor is not entirely successful; the wires can simply be torn out by a snag.
Checking the speed sensor
The design of the speed sensor is simple - it is a metal or plastic case, a ferromagnetic core and a winding in which the rotor rotates, generating an electrical impulse - the faster the sensor roller rotates, the greater the impulse, the further the speedometer needle deviates from zero.
Niva Chevrolet speedometer does not work
Modern cars have a large number of sensors that correct the operation of the car. And they are all very strongly interconnected. If the Chevrolet Niva speedometer does not work, then there may be several reasons for this, ranging from the speed sensor to the electronic control unit. This, in turn, can lead to improper engine operation, increased fuel consumption and other problems. Therefore, a non-functioning speedometer is not only a problem with traffic control, but also a possible cause of major malfunctions. This means that it is urgent to diagnose the car.
In the Niva Chevrolet, the speedometer needle is driven not by a cable, as on old cars, but by an electronic control system, which is controlled by a magnetic sensor. The speedometer needle is an ammeter driven by the difference in current transmitted by the sensor.
If, as a result of diagnostics, a problem is identified with the instrument panel, then in most cases it may require a complete replacement, since it is non-repairable and its components are located on one board.
The speed sensor transmitting the impulse to the instrument panel is installed on the transfer case. These signals are transmitted to the ECU, where they are processed, engine parameters are read and transmitted to the instrument panel.
It is quite simple to determine problems in the operation of the speedometer: these are inflated indicators, for example, when a car shows clearly inflated speed indicators, the needle twitches during uniform movement or does not rise from the zero mark.
There are several main reasons that can affect the operation of the speedometer:
- Mechanical damage to the instrument panel
- Damage to wiring or contacts
- Short circuit
- Speed sensor failure
- ECU failure
Some problems can be determined by connecting an OBDII sensor to the panel
If problems with the speedometer are accompanied by a Check Engine error, then in this case the problem will be related to the ECU. By checking it with a sensor, you can most likely detect error 0500.
First, you should conduct a self-diagnosis of the instrument panel. To do this you need to follow a few simple steps:
- Turn off the ignition and hold down the button to reset the daily mileage
- Hold the button to turn on the ignition
- Release the button
- If the instrument panel is working properly, then the instrument arrows should rise to the maximum division and return to their original position.
If the speedometer needle does not move or there are malfunctions in their operation, then the problem is in the instrument panel. You should disconnect it and check the condition of the contact blocks. It is possible that during operation due to vibrations, the contacts in the block became disconnected from the common bundle to the instrument panel.
Pin 9 is used to connect the speedometer. In some cases, for example, when repairing an instrument panel, it may be installed skewed, which may subsequently affect the operation of the system.
If these steps do not help, then you need to check the contact block on the speed sensor. To do this, you need to install the car on an inspection hole or overpass. It is located at the bottom of the transfer case and water and reagents used to treat roads can get on it.
After this, you need to check the wires leading from it to the speed sensor. The wire may fray or suffer other mechanical damage. The car body carries a negative charge - mass. And if the wire sheath is damaged, a short circuit may occur.
Main types of faults.
Like any car part, the sensor is subject to vibration and is susceptible to contamination and oxidation. Therefore, its failure is possible from time to time. To understand the cause of the breakdown and what to do in each specific situation, the following problems should be eliminated:
- broken wiring
- the appearance of oxide on the contacts
- destruction of wire insulation
- mechanical damage to the housing or its internal components
Also interesting: Chevrolet Niva pinouts. Wire diagrams
To do this, you can carry out a certain set of measures to check the condition of the sensor. Typically, such work requires a multimeter. The sensor is removed from the seat. A positive probe is connected to the contacts. The negative one is connected to the ground of the vehicle. The multimeter must be set to minimum power measurement mode.
There is a second diagnostic method. This does not require dismantling the sensor. The car is raised with a jack, then a multimeter is connected to the sensor. To appear, you need to rotate the wheel, observing the readings of the device. If the value does not change, the sensor is faulty.
Problems with DS arise from time to time, but not all of them require replacement. Some of them are caused by third-party reasons, such as:
- oxidation of contacts,
- wire break,
- damage to wire insulation,
- damage to gearbox mechanisms.
Why the speedometer on a Chevrolet Niva does not work: reasons
The answers are below. In the Niva Chevrolet, the speedometer needle is driven not by a cable and a magnetic device, as in classic VAZs, but by electronics. The speedometer itself, like the rest of the instruments on the panel, are nothing more than voltmeters or ammeters with different scales.
The speedometer receives an electrical impulse, the speedometer arrow is driven by a simple stepper electric motor. Repair of the Niva Chevrolet speedometer is often not durable. This is for information, because it is useless to poke into the speedometer itself, it is not repairable and if at least one element fails, you have to buy the entire instrument panel on the circuit board.
The speedometer receives an impulse from the speed sensor, and it is installed on the transfer case housing. Since there are not many elements in the electrical circuit of the Chevrolet Niva speedometer, there are only a few reasons for the device not working: Mechanical damage to the speedometer itself. In some cases, the Chevrolet Niva speedometer does not work; when repairing the instrument panel, it may be installed skewed, which may subsequently affect the operation of the system.
Chevrolet Niva: speedometer does not work
If these steps do not help, then you need to check the contact block on the speed sensor. To do this, you need to install the car on an inspection hole or overpass.
It is located at the bottom of the transfer case and water and reagents used to treat roads can get on it. If there is an error there that says the Chevrolet Niva speedometer does not work, you will have to look for a place for an inspection hole, an overpass, a lift, where it would be convenient to get to. The appearance of this code may be due to a malfunction of the speed sensor itself or its mechanical drive.
We’ll return to the sensor later, but for now we’ll check the entire dashboard for the functionality of each of the devices.
Why the speedometer does not work on a Chevrolet Niva
Turn off the ignition and press the daily mileage reset button. Using a transfer case on a Chevrolet Niva.
Do not release the button and turn on the ignition. In this case, the arrows on working instruments should move three times from zero to the maximum division.
Everything is clear here - if the speedometer refuses to fulfill the test conditions, the problem is either in the device itself or in the tidy board. Most likely, you will have to change the board assembly. Mechanical damage to the speedometer itself.
No contact in any of the terminal connections. Broken or shorted wire.
Replacing a faulty Chevrolet Niva speed sensor.
The work is carried out in an inspection pit. Before dismantling, you must disconnect the battery.
The sensor is located on the rear cover of the transfer case. Before removing it, you must disconnect the terminals. They are held in place by a plastic retainer.
Also interesting: Chevrolet Niva temperature sensor: where is it located, replacement
Then, using a wrench, the device is unscrewed from the seat.
If the device is firmly “stuck”, it is forbidden to use excessive force; it is better to treat the threads with a lubricant like WD-40.
Before installing a new device, you should carefully examine its condition. On the sensor, the assembly points and contact group must be carefully filled with varnish to prevent the penetration of water. Otherwise, the device may soon fail.
The ECU uses information from the mass air flow sensor to determine the duration of the injector opening pulse.
To remove the DS, you need to place the car on a level surface. After this, it is best to disconnect the battery terminals to avoid errors in the BC.
Disconnect the wire terminals; to do this, press the plastic lock on the block. After this, use a wrench to unscrew the sensor from its seat. If you cannot unscrew it immediately, it is not recommended to use excessive force. You need to treat the threaded connection with WD-40, wait a few minutes and continue dismantling.
Installation of a new DS is carried out in the reverse order. When purchasing a new part, you need to pay attention to the external condition: the contacts must be treated with a sufficient amount of varnish, as this protects them from moisture. After completing the work, it is necessary to reset the on-board computer errors in order to remove the CHECK ENGINE error.
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Why the Niva Chevrolet speedometer does not work: reasons and repairs
Failure of the speed sensor. ECU malfunction.
Dashboard test and speedometer check Error If there is error information in the ECU memory, this indicates that something is wrong with the impulse coming from the Chevrolet Niva sensor. How to disable the speedometer on a Chevrolet Niva - a few tips If the speedometer on a Chevrolet Niva is not working properly, but the indicator does not light up, then it’s time to diagnose the dashboard yourself. Simply press the button, which is used to reset the vehicle's daily readings - no need to turn on the ignition.
It will have to be turned on immediately after holding the button pressed for a while.
