Speed sensor for VAZ 2111, 2112, 2115, injector: VAZ repair

Automobile: VAZ-2112. Asks: Chuev Sergey. Essence of the question: Where is the speed sensor on the VAZ-2112, I want to replace it, but I just can’t find where it is?

Hello! Please tell me where the speed sensor is located on a VAZ-2112 with a 16-valve engine? I need to check it because the needle on the speedometer works somehow chaotically and unstable.

Types of speed sensors, their differences. Where is the speed sensor located?

Electronic 6-pulse sensors are equipped with cars with injection engines, launched into series since 2006.
On carburetor Samaras you can sometimes find 10-pulse EMF.
Until 2006, VAZ cars used mechanical devices in the form of special inserts between the speed indicator cables and the gearbox gear outputs.

The key difference between different types of EMF is the absence of wires and connecting connectors. For example, GM or Yantar systems are equipped with products with round (oval) ports. At the same time, Bosh uses wireless versions with square connectors.

On the VAZ-2110 (2111, 2112), speed sensors are mounted on the gearbox housings slightly to the right along the route, directly next to the oil control dipstick.
The device is easy to find by looking in the area of the right CV joint.
On the VAZ-2115, the electronic device is mounted on top of the front part of the gearbox (along the way) directly above the differential. The product with the connected cable is secured with one bolt on the box body.

Preparing for replacement

In order for the procedure for replacing the controller on the tenth VAZ model to proceed correctly and to obtain the expected result, namely the normal functioning of the speedometer, you should be properly prepared for this process.

Connector for connecting a VAZ 2112 speed sensor Firstly, on a VAZ 2112, replacing the DS means purchasing a new controller. When purchasing a new regulator, you need to pay attention to the fact that each connector located in the block design has certain symbols. It should contain the symbols “-”, “A” and “+”, not numbers. In principle, in this case there is not much difference between these options; when connecting the connector you will have fewer problems with pinout. If you have never encountered a process like this, this pinout will allow you to complete it correctly.

One more, no less important nuance. You need to buy a device that is equipped with a metal rod. This rod will last at least six months, which cannot be said about regulators with plastic rods.

In addition, when purchasing, you must check whether the rod rotates or not. It should not rotate, there should be no play on this element, and it should also be equipped with a washer.

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Speed sensor malfunctions

Typical symptoms of failure of the electronic speed sensor may be:

lack of electrical signals - error code P0500;
intermittent electrical signals with EMF - error code P0503;
the arrow moves chaotically in different directions, incorrect readings or other types of incorrect operation of the speed indicator;
unstable operation of the engine at idle: interruptions, floating speed, etc.;
increased consumption;
power failures, when you press the pedal the engine does not “pick up” speed, etc.

There can also be several reasons for problems with the Electronic Speed Sensor, for example:

power supply circuit break,
oxidation of contacts,
breakage of connecting wires or wear of the mechanical drive of the sensor.

How much does a replacement cost?

If the breakdown is not due to dirty contacts or broken wiring, it is better to replace the sensor. Moreover, it costs 170-400 rubles, depending on the type and manufacturer. The cost of replacing it at a service station is 100-150 rubles. Sensor part numbers:

with mechanical drive - 2110-3843010F;
electronic (new) - 2170-3843010.

When choosing a DS, pay attention to where it was manufactured. If a mechanically driven sensor requires replacement, under no circumstances buy Asian analogues - the drive gear is made of very low quality plastic. It happens that it breaks on the third day of use. In this case, you will have to disassemble the entire box to remove its fragments.

It is better to purchase a sensor with an all-metal drive.

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How to check the speed sensor

Most often, the failure of the EMF is a consequence of a break in the electrical circuit. Therefore, it is first advisable to check the integrity of the wiring and the condition of the connectors (contacts).

It is easy to check the functionality of the electronic sensor with your own hands if you have a multimeter. To do this, you must first dismantle the product. Then determine the contact through which electrical impulses are transmitted.

It is usually located in the middle of the block.

Connect it to the positive lead of the measuring instrument.
Having closed the negative cable to the machine body, rotate the EMF rod within a speed of 5 km/h.
Check the multimeter readings.
As the rotation intensity increases, the device readings (frequency and voltage) should increase proportionally.

We check all elements for functionality

After carrying out such work, any problem associated with the indicators on the instrument panel should disappear. If it remains, you should pay the greatest attention to the condition of the wiring of all contacts and connections.

Recently I had a problem the speedometer stopped working and I had to replace the speed sensor. I bought a new electronic one to last longer. Everything is described correctly and clearly in the article.

Even if there are problems with the speed sensor, it is replaced within 10 minutes. Everything is very simple there; the article describes the procedure for replacing the sensor.

Source

Principle of operation

Domestic VAZ-2112 cars with a 16-valve power unit are equipped with an electromechanical speed calculation system. It consists of the following elements.

The speed sensor is the main element of the circuit. It is an electronic modernized pulse Hall sensor with a rod equipped with a gear.
Electrical wiring that provides connection between the electric control unit and the on-board computer, fuse box, and instrument panel.
Electrical fuse and contact relay. Provide protection against voltage surges in the network.
Electronic drive of the speedometer itself.

The operation of the entire system is ensured as follows:

An electromechanical speed sensor is installed on the vehicle's gearbox. It is driven by the drive gear of the gearbox. Rotation is transmitted through the EMF driven gear.
Rotation is converted into electrical impulses. For 1000 revolutions, 6004 pulses are generated.
Electrical impulses through the wires, or more precisely through the “2” wire of the electrical connector, enter the on-board computer.
The ECU calculates the received signals, transferring them further along the circuit to the speedometer receiver drive.
Electrical voltage with a certain current strength acts on the speedometer electric motor, causing it to turn at a certain angle.

Wiring pinout, what to pay special attention to when using a multimeter

Pay attention to the pinout inside the block. With the ignition on, use a multimeter to determine which connector is connected to which wire. If you connect the wire to the “plus” connector, and the multimeter shows “minus”, then you should urgently change the polarity. Therefore, it is advisable to take a block with the appropriate designations. But if this doesn’t happen, you can take the regular one. In this case, the pinout is as follows - 1 is “+”, 2 is “signal output”, and 3 is “-“.

Examination

VAZ cars and a number of other cars have a speed sensor that operates on the Hall effect. It produces six pulses per revolution. But there are other devices - inductive or reed type.

The standard version of the controller operating on the Hall effect deserves the most attention.

The device has three contacts - pulse, ground and voltage. At the same time, car owners have three verification methods at their disposal.

First option:

Removing the speed sensor from the car.
Move the multimeter to the voltage change position (Volts).
Determining the purpose of the contacts (pinout).
Search for the pin that receives the pulse signal.
Connect the “plus” of the multimeter to this terminal. “Minus” is connected to the ground terminal (you can use the car body).
Rotate the shaft and monitor the voltmeter readings. The higher the cranking speed, the higher the voltage level.

To simplify the rotation process, a small piece of tube (for example, vinyl insulation) is put on the speed sensor axis.

The second method (suitable for Hall effect sensors) without removal:

Check that the controller is connected.
Lifting one wheel of the car. The goal is to lift it off the surface for easy rotation.
Preparing the multimeter - switching the scale to measure voltage.
Connecting the probes to the contacts in the same way as described above.
Rotation of a wheel disconnected from the surface and evaluation of the results obtained.

The voltage level and frequency must change. This indicates that the speed sensor is working properly. If the readings remain unchanged, the device has failed.

The third method is with a control lamp:

Preparing the warning lamp and turning on the ignition.
Raising the car wheel for further rotation.
Connecting one wire to the battery positive, and the second to the signal contact of the DC;
Spin the wheel and watch the light bulb.

If the lamp blinks noticeably when the wheel rotates, this indicates that the speed sensor is working properly.

The fourth method is with a warning lamp and removing the speed sensor:

Remove the controller from its original location.

Build the circuit shown below.

Connect the wires to the pins according to the pinout below.

We connect one terminal to ground, the second to the battery positive. The latter can be not only for a car - you can use any 12 V power source.

Take a piece of brake pipe and place it on the sensor rod. To make it easier to control the number of revolutions, screw electrical tape onto the tube, as shown below.

Start rotating the rod using the tube. As a rule, the light should blink 6 times in one revolution, but it all depends on the make of the car.

Some recommendations

The search for the cause of the speedometer's inoperability should begin with an external inspection of the DS and the wires going to it. Wires often break in close proximity to the plug.
If the speed sensor is covered with a layer of dirt or oily, you need to remove it, wipe it, reinstall it and check the speedometer readings again. Perhaps after this the instrument needle will again begin to show speed normally.
If you cannot figure out the problem yourself, you should contact an electrician at a car service center.

Reasons why the speedometer does not work on the VAZ 2110

The vast majority of VAZ 2110 cars are equipped with electronic odometers. They can disturb their owners with various malfunctions, which, as a rule, manifest themselves in different ways.

A speedometer is one of the main instruments of a car, which is used to measure the speed of a vehicle. Its breakdown, of course, does not lead to serious malfunctions in the operation of the car, but when the speedometer needle jumps from one indicator to another or even hangs at some value, it deprives the driver of the ability to control the speed of the car.

This can lead to both fines and more serious consequences. Therefore, if the VAZ 2110 speedometer does not work, it is necessary to carry out repairs, especially since this process can be quite easy and fast if the cause of the malfunction is correctly identified.

Malfunctions

On VAZ 2110 cars, the speed sensor can fail for several reasons:

Oxidation of contacts. This is the most minor damage. However, it can cause the needle to drop to zero or jump. To eliminate it, you must thoroughly clean all contacts from dirt;
Wire chafing. The main sign of this breakdown is that the needle falls or jumps after starting the engine. Such a malfunction is not always detected visually, since in some cases the wire may outwardly appear intact, but in fact has a break. To determine the location of the damage, you need to ring it using a special tester. A broken wire is often the cause of failure of the instrument panel, and in particular the speedometer;
The sensor has stopped working. In order to make sure that the breakdown is correctly identified, you can take a new speed sensor and connect it. If the speedometer starts working after this, then the conclusion is obvious. Failure of the speed sensor may occur due to the housing not being sealed, as a result of which dirt, dust, and moisture can enter;
Checking the connectors. In VAZ cars they are located in such a place that they are constantly in contact with dirt and quite often this is the main reason that the speedometer needle jumps or refuses to work at all, showing incorrect vehicle speed values;
Drive unit. Also, the reason why the needle jumps on the speedometer may be wear of the shaft. With such a malfunction, the VAZ 2110 speedometer drive does not effectively transmit torque. It is worth noting that this is one of the most common reasons why the sensor needle jumps.

If the vehicle speed indicator does not work correctly, before purchasing a new device, you need to check all possible breakdowns and only then think about replacing it.

Replacement features

The speedometer is located on the main instrument panel. And if, after checking all possible reasons why the device does not work, it turns out that all the faults lie in the device itself, then the entire panel will have to be replaced, and not just this individual element.

Today, unfortunately, spare parts for dashboards are not sold and this complicates the entire replacement process. It is worth noting that when installing a new device, you can rewind the mileage indicators.

Replacement

If during diagnostics it was determined that the needle is falling or jumping as a result of a breakdown of the speed sensor itself, it needs to be replaced. This manipulation is quite simple, but still requires certain knowledge and skills from the car owner.

To replace the speed sensor you will need special keys. It is better to carry out manipulation from above the engine. First, you need to disconnect the battery ground and contact chips, then remove the device using a key. If the rod is broken, then you cannot do without removing the drive. Here you need to be especially careful.

If the arrow jumps, lies or freezes, then repairs must be made as soon as possible. It is better to entrust such work to professionals, since without the necessary experience and certain knowledge, replacing a device can be done poorly.

Only professionals at service stations can quickly remove and install new equipment. As a rule, such a procedure does not take much time and its cost is low.

The VAZ 2110 speedometer does not work, what should I do?

The vast majority of VAZ 2110 cars are equipped with electronic odometers.
They can disturb their owners with various malfunctions, which, as a rule, manifest themselves in different ways. A speedometer is one of the main instruments of a car, which is used to measure the speed of a vehicle. Its breakdown, of course, does not lead to serious malfunctions in the operation of the car, but when the speedometer needle jumps from one indicator to another or even hangs at some value, it deprives the driver of the ability to control the speed of the car.