The latest models of Tolyatti classics were produced with electronic engine control units (ECU). This is an embedded system on which the balanced operation of components and assemblies depends. Data from the VAZ 2107 speed sensor (injector) also goes to the ECU and, if it malfunctions, can lead to a number of negative factors (incorrect readings on the speedometer and odometer, increased fuel consumption and loss of power). Next, we will tell you how to calculate the malfunction and replace the sensor yourself.
The principle of operation of the VAZ 2107 speed sensor
The operation of the speed sensor is based on the Hall effect, which describes the occurrence of electrical impulses when a conductor with direct current is placed in a magnetic field. The sensor generates pulses during the rotation of the output shaft of the VAZ 2107 gearbox. During the time the car travels a kilometer, the VAZ 2107 speed sensor generates about 6000 pulses, the frequency of which allows you to determine the current speed.
Where is the VAZ 2107 speed sensor located?
The sensor is mounted on the gearbox in the speedometer cable drive mechanism. To remove and check it, you will have to disconnect the gearbox speedometer cable.
Symptoms of a problem
The main sign of problems in the operation of the sensor is the issuance of the corresponding error code by the on-board computer. Malfunctions may manifest themselves in other signs:
- increased fuel consumption;
- poor engine thrust;
- speedometer not working or working with a large error;
- unstable idle.
Attention! These four symptoms can be caused by problems with other parts of the car.
Electromechanical
In such devices there is no longer a cable as a means of transmitting rotation. Rotation is converted into impulses as in electronic devices, followed by conversion into rotation using electric motors. Further, these electric motors, rotating at a speed directly dependent on the speed of rotation of the gearbox output shaft, control the operation of their components, speedometer or odometer.
How to remove the speed sensor VAZ 2107
To remove the speed sensor, you must perform the following operations:
- install the car above the inspection hole;
- engage the parking brake;
- place wheel chocks under the wheels;
- from the inspection hole, using a slotted screwdriver, unscrew the nut of the speedometer drive cable;
- disconnect the cable from the gearbox;
- loosen the plastic clamp that tightens the wiring harness coming from the speed sensor;
- press the spring clips and disconnect the block from the speed sensor;
- Using a 22mm wrench, unscrew the sensor from the speedometer drive;
- remove the speed sensor.
The VAZ 2107 speed sensor can be checked using a multimeter or “control”. To install the sensor, you must do the above steps in reverse order.
Pinout of the dashboard of VAZ2110, 2111, 2112
- fuel reserve warning lamp;
- dashboard lighting lamps;
- right repeater indicator lamp;
- left repeater indicator lamp;
- VAZ plug block;
- coolant temperature sensor;
- indicator lamp for external lighting;
- carburetor air damper warning lamp;
- oil pressure warning lamp;
- handbrake indicator lamp;
- battery charge indicator lamp;
- VAZ tachometer;
- indicator light “CHECK ENGINE”;
- speedometer dashboard;
- brake fluid level warning lamp;
- hazard warning lamp;
- high beam indicator lamp;
- fuel level indicator.
| White block (X1) | Red block (X2) | ||
| 1 | Housing (weight) | 1 | To terminal “W” of the fuel level indicator sensor |
| 2 | Tachometer (low voltage input from ECU) | 2 | Fuse F19 + 12V power supply |
| 3 | Tachometer (high voltage input from coil) | 3 | Housing (weight) |
| 4 | Const +12V from battery (via 6th fuse) | 4 | Instrument lighting switch |
| 5 | Coolant temperature sensor. | 5 | Turn signal RIGHT |
| 6 | Fuse F1 (side light) | 6 | Turn signal LEFT |
| 7 | Throttle valve (“choke”) | 7 | Brake fluid level |
| 8 | Check Engine Light | 8 | To the trip computer |
| 9 | Fuse F19 + 12V power supply | 9 | Speed sensor |
| 10 | Fuse F19 + 12V power supply | 10 | Terminal “T” fuel gauge |
| 11 | Parking brake, terminal “VK” | 11 | Fuse F3 (high beam) |
| 12 | Generator output “D” | 12 | Hazard switch |
| 13 | Oil pressure sensor | 13 | To terminal “50” of the ignition switch |
Checking the speed sensor
- connect a voltmeter to the sensor output that supplies electrical signals and to the vehicle ground;
- put the tube on the sensor axis;
- rotate the tube.
As the tube rotates, the voltage at the sensor output should increase in proportion to the rotation speed. If this does not happen, the VAZ 2107 speed sensor needs to be replaced.
Tip: In a similar way, you can check the speed sensor directly on the car. To do this, you need to hang up one of the drive wheels, connect a voltmeter to the sensor output and ground, and start rotating the wheels. If voltage and pulses appear, the sensor is working.
Instead of a voltmeter, you can use a test lamp. In this case, when checking the functionality, voltage must be applied to the “positive” output of the speed sensor. If the light flashes when you rotate the sensor, the problem is not with the sensor. You will have to check other components and parts of the “seven” that could affect the operation of the engine ECU.
This is what the speed sensor looks like
The operation of the injection speed sensor of the VAZ-2107 is to send information about the speed of the vehicle to the electronic unit that controls the engine (ECU) while driving. Violations and malfunctions in its functioning may lead to Contents
How does the VAZ 2107 injection speed sensor work? Where is the VAZ-2107 injector speed sensor located? What indicates a malfunction of the speed sensor What breaks in it Correctly removing the speed sensor from a VAZ-2107 is not difficult The procedure for checking the speed sensor
to loss of engine power and increased gasoline consumption. To check and, if necessary, replace this sensor on your own, you will need an inspection hole or a lift. The tools you will need are: a negative screwdriver, a 22 mm combination wrench, a test lamp or a multimeter.
How to check the speed sensor
Speed sensor connector pin numbers
The latest models of Tolyatti classics were produced with electronic engine control units (ECU). This is an embedded system on which the balanced operation of components and assemblies depends. Data from the VAZ 2107 speed sensor (injector) also goes to the ECU and, if it malfunctions, can lead to a number of negative factors (incorrect readings on the speedometer and odometer, increased fuel consumption and loss of power). Next, we will tell you how to calculate the malfunction and replace the sensor yourself.
Instrument panels VAZ VDO (LED)
You can install a more beautiful and convenient panel with LED indicators, the so-called VDO panel. Here VDO is the panel manufacturer.
| Connecting VDO on a Kalina car | ||
| 1 | Pink-white | To electric power steering |
| 2 | Blue and white | To the hazard warning indicator |
| 3 | Gray-blue | To emergency oil pressure sensor |
| 4 | Brown blue | To the parking brake switch |
| 5 | Yellow-blue | To the immobilizer control unit |
| 6 | Black | To the airbag control unit |
| 7 | Yellow | To the outside light switch |
| 8 | Blue | To the right turn signal switch |
| 9 | Blue with black | To left turn signal switch |
| 10 | White-blue | TO ECU |
| 11 | . | To brake pad wear sensor |
| 12 | . | To seat belt sensor |
| 13 | Black | To the traction control control unit |
| 14 | Red-blue | “RESET” key on the steering column switch |
| 15 | Pink-blue | To brake fluid level sensor |
| 16 | Black | To ABS |
| 17 | Green | To the high beam switch |
| 18 | White | To the instrument cluster light control |
| 19 | Brown | Panel weight |
| 20 | White-red | Terminal “30” |
| 21 | Orange | Terminal “15” |
| 22 | Yellow-red | To fuel flow sensor |
| 23 | Orange-white | MK key “forward” |
| 24 | White black | MK key “back” |
| 25 | Black and white | Outside temperature sensor (-) |
| 26 | Yellow-green | Outside temperature sensor (+) |
| 27 | Pink | Fuel level sensor |
| 28 | Grey | Speed sensor |
| 29 | Green-white | Coolant temperature sensor |
| 30 | Brown-red | Tachometer (low voltage) |
| 31 | . | Official. Panel diagnostics. |
| 32 | Brown-white | Terminal “L” of the generator relay regulator |
Symptoms of a problem
In most cases, damage to the sensor on the injection VAZ-2107 is indicated by a yellow indicator on the instrument panel. In this case, you can notice that the car has become:
- Unstable operation at idle speed;
- show errors on the speedometer;
- consume more gasoline;
- bad pull.
It is recommended to carry out diagnostics, for example, through an application on a smartphone (ELM327 VAZ for Android), since the listed defects can be caused by problems with other elements of the system.
VAZ instrument panel indicators - explanation
- coolant temperature gauge.
- tachometer;
- left turn signal indicator lamp;
- right turn signal indicator lamp;
- speedometer;
- fuel level indicator;
- fuel reserve warning lamp;
- side light indicator lamp;
- service brake system warning lamp;
- high beam indicator lamp;
- reset button;
- mileage indicator;
- warning lamp for turning on the hazard warning lights;
- "check engine" warning light;
- time and temperature indicator;
- battery charge indicator lamp or battery lamp;
- parking brake warning lamp;
- oil pressure warning lamp;
- reserve.
VAZ dashboard indicators play an important role in informing the user about malfunctions. They help prevent errors in the system, so it is important to know which indicator means what. How does the panel work? If any problem occurs, the sensor immediately sends information to the panel, and the driver will see an orange signal light up.
The earlier version of the instrument panel had some other symbols, such as emergency oil pressure, handbrake engaged, Chek Engine light, and several others that indicate minor operating errors, but which are no longer used.
Replacement
Before repairs, it is necessary to do preparatory work. Firstly, you will need a pit, overpass or lift. Secondly, you will need a tool: a powerful flat-head screwdriver and a 22mm open-end wrench. The sequence for removing the speed sensor on an injection VAZ 2107 is as follows:
- Unscrew the speedometer cable nut and remove it.
- Press the connector lock and disconnect the connection.
- Use a 22 mm wrench to unscrew the sensor itself.
Assembly of the unit is carried out in the reverse order. After replacement, most likely, a check light will light up on the instrument panel. This is a circuit fault. To fix the problem, you need to clear the error through the application.
Video on the topic
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 change it to a new one of the same kind. 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.
October 11, 2018
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The speed sensor is an element of the vehicle's electronic control system. It depends on its readings how much fuel will be supplied, how much air will bypass the throttle valve when idling, and what the speedometer readings will be.
The speed sensor of a VAZ car is based on the use of the Hall effect, that is, a stream of pulses is transmitted from the device to the car's ECU, the frequency of which is proportional to the speed of the car. Auto electronics, analyzing incoming data, selects the required idle speed and sends a signal to a device that regulates the engine idle speed, which optimizes the composition of the air-droplet mixture entering the combustion chamber, bypassing the throttle valve.
During a distance of one kilometer, the speed sensor transmits over 6000 pulses to the ECU. Based on the parameters of the time analysis of inter-pulse signals, the on-board computer transmits data to the dashboard, thereby determining the speedometer readings.
As in many other cars, the VAZ speed sensor is located in the upper part of the gearbox housing, not far from the engine oil level dipstick. You can get to it from two sides: from above, by opening the hood and disconnecting the adsorber, and from below, using the inspection hole for convenience.
Pinout DS 2109, 2110, 2112, 2114, 2115
If you understand how to connect the speed sensor, then there is the following pinout that you should follow. At the same time, it is important to understand the essence of the operation of the DS to study the circuit diagram of the sensor, which is attached to this article.
The factory speed sensor of VAZ cars is manufactured with some differences in connections to the block connector. The square-shaped connector is used in Bosh electronics systems. The circle-shaped connector is used in electronic systems such as January 4 and GM.
When connecting a sensor, you should choose devices with contact group digitization such as “-”, “A”, “+” (internal designation on the block contacts) instead of digital designations such as “1”, “2”, “3”. In addition, preference should be given to devices with a metal-type rod, since plastic rods are very short-lived.
How to check the VAZ speed sensor
A failed speedometer sensor in a VAZ car is easily determined - in this case, the speedometer stops working, and it may also show some signs of life, but display incorrect information.
Useful: USB – A, B, C and D: pinout, speed and connection features
Using a tube, pliers or other available tools, rotate the sensor axis. In this case, you should see the voltmeter readings changing: the higher the speed, the higher the voltage (from 0.5 to 10 V). If this does not happen, the sensor requires replacement.
Product delivery options
Note! Below are the shipping methods available specifically for this product. Payment options may vary depending on the shipping method. Detailed information can be found on the “Delivery and Payment” page.
Parcel by Russian Post
Available payment methods:
Shipping throughout Russia. Delivery time is from 5 to 12 days.
Parcel by Russian Post 1st class
Available payment methods:
Shipping throughout Russia. Delivery time is from 2 to 5 days. More expensive than regular delivery by Russian Post, approximately 50%. Parcel weight up to 2.5 kg
Express Parcel EMS
Available payment methods:
Shipping throughout Russia. Delivery time is from 3 to 7 days. More expensive than regular delivery by Russian Post, approximately 100%.
Transport companies
Available payment methods:
Delivery is possible to any locality where there is a representative office of the transport company. Delivery time is from 2 to 10 days. Sending large parcels is approximately 50% more profitable than by Russian Post.
