Basic speedometer faults
Malfunctions can be divided into two types:
- the speedometer does not show the current speed;
- The speedometer drive is noisy.
The VAZ 2107 speedometer may not work for the following reasons:
- The speedometer is faulty. In this case, the device must be replaced.
- The nuts securing the ends of the flexible shaft have come loose. To fix the problem, they need to be screwed on.
- The flexible shaft is broken. It must be replaced to restore the speedometer's functionality.
- The tip of the flexible shaft or the mating socket on the speedometer is damaged. In this case, you should change the VAZ 2107 speedometer cable or the speedometer itself
- The flexible shaft drive is faulty or the speedometer drive socket in the gearbox is damaged. This is a rare breakdown, the elimination of which involves repairing the gearbox and is worthy of description in a separate article.
The VAZ 2107 speedometer drive can make noise for two reasons:
- The drive is laid with small bending radii. To fix the problem, you need to re-route the speedometer cable, having previously lubricated it.
- The braiding of the VAZ 2107 speedometer cable is damaged. In this case, the flexible speedometer drive assembly needs to be replaced.
As practice shows, most malfunctions are related specifically to the VAZ 2107 speedometer cable and can be eliminated by replacing it.
Why the speedometer on the VAZ-2107 does not work
Hello everyone, today I would like to talk about possible reasons why the speedometer on a VAZ-2107 car does not work. As you probably know, “sevens” stopped being produced back in 2012, but you can still find on our roads not only fuel-injected but, strangely enough, also carburetor cars of this family. Why did I remember this? Yes, because on carburetor Zhigulis mechanical speedometer drives were installed, and on injection ones an electronic speedometer was installed.
So, let's take a closer look at the mechanical speedometer drive on the VAZ-2107. The drive received torque using a worm gearbox from the gearbox. The most common malfunction in this unit was a broken cable or cut off edges at the ends. The way to check it was to disconnect the flexible cable from the speedometer and ask someone to spin the hanging rear wheel and see if the cable was spinning or not. If the cable does not spin, then it should be replaced, but if it spins, then the problem is in the speedometer itself.
Now let's move on to the speedometer of a VAZ 2107 car with an injection engine. The electronic drive on the seven also has a worm gearbox, which rotates due to the shaft of the speed sensor, the purpose of which is to convert the rotation speed into electrical impulses. Next, these impulses come through the ECU to the speedometer stepper motor, which will show us the speed of the car.
If the speedometer on an injection VAZ-2107 stops working, the first thing you need to do is test the instrument panel. To do this, with the ignition off, you need to press the daily mileage reset button and, while holding this button, turn on the ignition. In panel test mode, all hands should start moving from the beginning of the scale to the end. This action should be repeated three times, provided that the instrument cluster of the VAZ 2107 is working properly.
If the speedometer fails this test, it is faulty and will need to be replaced. And if during the test the speedometer works normally, then most likely the speed sensor has failed. In order to check the speed sensor, you need to replace it with a new one of the same type. If after changing this speed sensor the speedometer comes to life, then you did everything correctly, but if the speedometer does not work, then you will need to check the connectors of the electrical circuit from the instrument cluster to the speed sensor. Well, that's all, we looked at the main causes and malfunctions of the speedometer on a VAZ-2107 car. Bye everyone.
Removing the VAZ 2107 speedometer cable
The procedure for removing the speedometer drive is as follows:
- place the car on a lift or inspection hole;
- disconnect the ground wire from the battery;
- dismantle the instrument panel;
- unscrew the nut securing the cable to the speedometer mechanism and uncouple it;
- tie a wire to the eye of the nut;
- Unscrew the nut securing the flexible drive to the gearbox;
- disconnect the speedometer cable from the box;
- pull the cable out of the car so that the attached guide wire remains in it;
- untie the wire from the nut.
Correctly removing the speed sensor from a VAZ-2107 is not difficult
To do this, you need to perform the following actions: – place the car above the inspection ditch or lift it on a lift; – when using an inspection ditch, we fix the wheels with a parking brake and install anti-roll devices; – use a screwdriver to unscrew the speedometer cable fixing screw; – pull out the cable from the drive socket;
Read, it might come in handy: How not to overpay for a battery - we buy it for a VAZ-2107
– disconnect the plastic clamp of the wiring harness; – pressing the clamp springs, unhook the speed sensor connector; – using a 22 mm wrench, unscrew the sensor and remove it.
To assemble the unit, we will perform all the work in reverse order.
Installing a VAZ 2107 speedometer cable
Before installing a new cable, it must be pulled out of the casing, lubricated with Litol grease and inserted into place.
Next, you need to tie the guide wire to the nut securing the cable to the speedometer and pull it from the bottom of the car into the interior.
Further actions are performed in the reverse order of removing the speedometer cable.
After installing the cable, you must insert the rubber protective cover located on the braid. into a hole in the car body. through which the cable passes into the cabin.
This completes the repair of the VAZ 2107 speedometer
The principle of operation of the speedometer 2107
The mechanical drive consists of transmitting torque from the manual transmission to the speedometer thanks to a steel cable and worm gears. Constant load on the cable often puts it out of working condition. The main failures were considered to be the breaking of the cable and the erasure of its edges.
There is only one way to make sure that the flexible shaft of the speed measuring device is faulty by following these steps:
- we hang the rear wheel using a jack or other available means;
- engage any forward gear;
- We turn the rear suspended wheel by hand and make sure that the speedometer cable is working;
If there are no rotational movements, then the speedometer cable is faulty, and if there are any, then the speed measuring device itself is faulty. In any of these cases, you will have to replace the non-working device with a new one. You can try to fix a non-working speedometer yourself or contact specialist car repair shops who have all the tools and equipment necessary for repairs. It is best to replace the speedometer or drive cable on a car lift rather than doing it in a pit or on an overpass. Now the question of how to change the speedometer cable on a VAZ 2107 will not confuse you.
Speedometer VAZ 2107 injector. Checking and replacing the VAZ 2107 speed sensor
How to remove the speed sensor VAZ 2107
To remove the speed sensor, you must perform the following operations:
The VAZ- 2107 is a luxury version of the simpler VAZ-2105 car, but everything also belongs to the general family of “classics” of the Volzhsky Automobile Plant. This brand of car was produced in Russia until 2012, so on the roads you can see both new examples of cars and honorary old men of thirty years of age.
This model differs from other classic VAZ cars in a large number of modifications associated with different engine sizes. The “sevens” were equipped with engines with a volume of 1.3 liters, 1.5 liters, 1.6 liters, 1.7 liters. On special models produced for the Ministry of Internal Affairs and the KGB, which were later decommissioned and fell into private hands, even rotary piston engines with a volume of 1.3 liters and a power of 140 hp were installed.
Such a variety of engine systems has led to the fact that the VAZ-2107 model has a fairly large range of spare parts, which are constantly in demand during repairs and periodic maintenance of these vehicles. Also, recently, a trend has developed towards deep tuning of this model, which consists in installing a more powerful engine and reinforced suspension, for the participation of modified cars in unrecognized, but quite popular street racing among young people.
Speed sensor 2111-3843010-30 b290 with flat connector without wire for VAZ 2110-12, 2113-15
Speed sensor 2170-3843010 without wire for LADA Priora
Speed sensor 1118-3843010 without wire for LADA Kalina
Speed sensor with flat connector, with wire for VAZ 2108-099
Speed sensor 21093-3843010-30 with flat connector, with wire for LADA 4x4, Chevrolet Niva
Replacing the speedometer sensor and drive or engine error (part 2)
Speed sensor gm 2112-3843010-01 with round connector, with wire for VAZ 2110-12, 2108-099
Speed sensor for VAZ 2101-2107, 2108-21099, 2110-2112, 2113-2115, LADA Niva
Lower gearbox shaft speed sensor roers parts
This article will focus on a car speed sensor, which is designed to measure speed and transmit this information to the electronic control unit.
What are the signs of a faulty speed sensor on VAZ ? Firstly: the speedometer gives incorrect readings or does not work at all. Secondly: these are problems at idle. If you are faced with a problem that the car stalls at idle, for example, if you are coasting, or when changing gear, then you should check this sensor. Also, if it malfunctions, engine thrust decreases, which increases fuel consumption, since you have to press the gas pedal harder.
Auto-assistance
The VAZ-2107 passenger car ceased production in 2012, but you can still find “Seven” in operation not only with an injection engine, but also with a carburetor engine. The main difference in the design of the speedometers on these VAZ-2107s was that on the carburetor “sevens” it had a mechanical drive, while on the injection ones the speedometer was electronic.
The mechanically driven speedometer received torque from the secondary shaft of the gearbox using a worm gear and a flexible cable. The most common malfunctions in this device were the cable breaking or cutting off the edges at its ends. In order to verify this, it was necessary to disconnect the flexible cable from the speedometer, and using a jack, hang one of the rear wheels of the car. Then ask someone to look at the tip of the flexible cable and spin the hanging wheel yourself. If the flexible shaft does not rotate, then your assumption was correct and it will have to be replaced. Well, if the cable rotates, then the speedometer itself will be faulty.
Speedometers of the “sevens” with an electronic drive also have a worm gear on the secondary shaft of the gearbox, which rotates the speed sensor shaft, the task of which is to convert the rotation speed into electrical impulses. These pulses, through the electronic control unit (ECU), are sent to the speedometer stepper motor, which begins to display the speed of the car.
If the speedometer stops working, then to find out the location of the fault, it is necessary to test the instrument cluster. To do this, with the ignition off, you need to press the daily readings reset button, and then turn on the ignition. In this case, all instrument needles should begin to move from the beginning to the end of the scale. This should be repeated three times, provided that the devices themselves are in good working order.
If the speedometer refuses to perform this test, it means that it will have to be replaced because it is faulty. And if the speedometer fully performs this test, then the most likely malfunction will be failure of the speed sensor. In order to check this assumption, the speed sensor located on the gearbox housing will have to be replaced with the same one, but a new one.
If after replacing the speed sensor the speedometer works, then your assumption was correct, but if the speedometer does not work, then you will have to check the condition of the plug connectors in the electrical circuit from the speed sensor to the instrument cluster.
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How to check the speed sensor
There is no need to talk about checking the DS on cars with a carburetor, since they use a cable system for transmitting torque directly to the speedometer, and there is simply no sensor. On cars with an injector, a DS is installed, the operation of which is based on the use of the Hall effect. The device is located on the gearbox near the exhaust manifold. This “neighborhood” leads to heating and chafing of the wires entering the block.
The performance of the speed sensor can be checked in several ways. To do this, the output electrical characteristics are measured using a portable oscilloscope or multimeter. The DS can be dismantled and the core can be rotated counterclockwise with a screwdriver. The oscilloscope screen should display a rectangular signal with a lower voltage value of 1 V, and an upper voltage value of at least 5 V. When the wheel is turned 1 revolution, 6 pulses appear at the output.
If there is a signal, but the speedometer does not work, a possible cause is a breakdown of the sensor drive. If the edges of the shaft are “eaten”, then the device will have to be completely replaced. If no signal appears when measuring the output characteristics, this indicates a malfunction of the sensor motor. Their measurement can be carried out without dismantling the primary device. To do this, you need to jack up the front wheel and, rotating it, take readings. It is more convenient to carry out such work with an assistant.
If, after replacing the sensor, the speedometer shows a speed that does not correspond to the driving mode, then the reason may lie in a breakdown of the DS drive gear. In this case, it is replaced along with the gear. When purchasing a working drive, you need to pay attention to the number of teeth. If their number does not coincide with the standard gear, then the work will have to be carried out again.
Speedometer on VAZ 2110: diagnostics and replacement
- Types of breakdowns
- Replacement nuances
- Replacing the speed sensor
It’s hardly worth reminding that the speedometer allows you to determine your current speed, as well as provide information about the number of kilometers traveled over a certain segment or over the entire period of operation of your VAZ 2110.
Fallen arrow
Today, most domestic “ten” cars are equipped with an electronic odometer. All sorts of malfunctions and problems happen to them, manifesting themselves in one way or another.
This is not to say that its breakdown is something very serious. But when the arrow falls down or jumps from one reading to another, although you do not change the speed, there is little pleasure in such situations. The most important thing is that you are not able to control your own speed. And this leads to unnecessary fines and more tragic consequences.
Therefore, if problems arise with the speedometer, it should be repaired or replaced.
The drive can make noise for the following reasons:
- the cable has a small bending radius. Here it is necessary to re-route the drive;
- The cable sheath is damaged. In such a situation, it is necessary to replace the speedometer drive assembly.
As practice shows, the largest number of breakdowns of the VAZ-2107 speedometer are associated with its drive and can be eliminated by replacing the flexible cable. To do this you will need pliers and a screwdriver. To facilitate installation, you can use steel wire with a length of about 2 m and a cross-section of 0.5 mm. The drive is fixed in the lower part of the crankcase to the gearbox, so repairs require a lift or inspection hole.
