Mileage vehicle the main criterion by which the timing for carrying out Maintenance. And the odometer is responsible for the mileage readings. There are a number of reasons why drivers have to roll back odometer readings. In the article we will tell you what the speedometer twist is and how to use it correctly.

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Types of speedometers

Before you tell how to unwind or wind a mileage on a car, we recommend that you familiarize yourself with the types of speedometers. Today, there are several types of devices used in cars - mechanical, electromechanical and electronic devices.

Mechanical

The revolutions from the gearbox are transmitted to the device using a cable. On the odometer, the revolutions are measured, in accordance with which a certain path is set. For speedometer mechanical type a special editor is used, configured with the necessary conversion factor.

In practice, it turns out that one revolution corresponds to a certain amount of mileage. The rotation of the output pulley is analyzed by display devices with marked numbers, which display the mileage traveled.

Electromechanical

An electromechanical device is a more advanced version of a mechanical one. As a result of the cable showing incorrect information, the electromechanical version is supplemented by a speed controller. Signals from the controller were sent to an electric motor designed to rotate the gearbox. This is the fundamental difference, in all other respects the devices are similar.

Electronic

Recently, all modern transports have been equipped with an electronic version. An electronic device is designed to measure the number of wheel revolutions. The device, analyzing the size of the circumference of the wheel, translates the number of revolutions into the distance traveled. The information is displayed on a liquid crystal display.

Why rewind?

Before we tell you about the operation of the speedometer twist, it will not be superfluous to figure out why to wind and wind the readings. Winding the indicator with the help of a special winder allows you to increase the cost of transport during the sale, this is understandable.

As for winding, there can be several reasons:

1. The speedometer winder can be used to increase the cost of fuels and lubricants. After all, increased mileage makes it possible to write off more gasoline - such schemes are relevant for drivers commercial vehicles. But if a commercial enterprise uses old car, fuel consumption will be higher. Adjusting the speedometer allows you to offset the cost of refueling.
2. Speedometer calibration may be required when replacing dashboard. After all, changing the control panel, it is necessary to carry out the readings of the device in accordance with the operating conditions.
3. The speedometer winder may be required when using other discs not recommended by the manufacturer. The diameter of the discs can be either larger or smaller, during the calculations the odometer may give errors, showing incorrect readings. The speedometer corrector makes it possible to eliminate the error.

Modern dashboard

Winding instruction

How is the winding of the speedometer done by hand? Much depends on the type of device, since for each individual type the winding scheme will differ. To complete the task, you need to know exactly what type of device the car is equipped with.

Mechanical

How to wind and how to wind readings on a mechanical device, for example, on VAZ, GAZ cars? There are two options to rewind the speedometer. The first and simplest is to disconnect the cable from the speed sensor, the end that is attached to the box, connect a drill to it and turn the tool into reverse mode. As you know, in a few minutes of work, you can rewind a decent mileage. The second way is to dismantle and disassemble the dashboard. After disassembly, the odometer (meter) itself is removed, as a result, the distance traveled is adjusted. Note that the methods are relevant for domestic cars produced before 2005 (the author of the video is DIY).

Electromechanical

An electromechanical device can be found on older vehicles, but winding up this type of speedometer will be more difficult than a conventional mechanical one. In this case, the winding or unwinding procedure requires different approaches. It must be taken into account that the reduction in mileage in the case of an electromechanical device is carried out when dismantling and disassembling the control panel. To rewind the readings, the counter must be dismantled, then manually adjust the numbers.

As for the increase in readings, the procedure is carried out using a generator. Thanks to the generator, signals are generated that are fed to the control input. In accordance with the number of pulses, the readings of the device are formed.

Electronic

How to twist an electronic type speedometer? As mentioned above, devices are mounted on all modern cars. Correction of the speedometer readings should be carried out in accordance with the period of production of the transport. The bottom line is that an electronic device during production could be implemented in different ways, especially since it can interact with other devices (the author of the video is max gladkiy).

Therefore, in order to wind up the speedometer, you will need not only to send a signal from the speed controller, but also to reconfigure some devices. It should be borne in mind that the process of accessing the device is determined in accordance with the model of the machine, as well as the year of manufacture, everything is individual here. Accordingly, twisting the readings can be problematic, but it is possible. If you don’t know how to wind up an electronic type speedometer, you will have to use a special device. The types of such devices will be discussed below.

Winding devices and devices

Most manufacturers equip cars with original electronic speedometers; it can be problematic to rewind the mileage. As a result, various versions of devices were created with which you can adjust the mileage. Device circuits can be assembled on the basis of microprocessor boards or discrete components.

CAN twist

Disassembled CAN-twist

CAN-twist represents the device for operation modern transport. It should be borne in mind that CAN is a special bus through which pulses are exchanged between blocks electronic devices cars. And the scheme implies the use of a special connector for diagnostics. Through the connector, knowing the exchange protocol, the motorist has the opportunity to gain access to individual electronic devices.

Thanks to the use of the CAN-twist, it is possible to correct the content of the necessary cells in the memory of the control unit in order to set the required twisted mileage. The operation of the CAN-twist is the main way of rewinding the distance traveled by car dealers. Using modern diagnostic equipment, it is problematic to detect changes in memory cells.

Pulse

The impulse twist is used in foreign-made machines that are not equipped with a CAN bus. The device should be connected via the OBD2 diagnostic connector. During the operation of the twister, signals are received on the odometer that imitate pulses from the speed controller. The distance traveled changes.

Speed ​​generator

The speed generator allows you to simulate the operation of a speed sensor. Instead of the controller, it is necessary to connect a generator that produces a sequence of signals that go to the odometer. The generator changes the readings on the odometer. The operation of such a device is relevant in electromechanical speedometers on UAZ, VAZ and automobiles. Russian production released before 2006.

Sometimes, when operating a car, it becomes necessary to correct the speedometer readings upwards, in simple terms, "wind up the readings." In order to do this, a large number of different devices are currently being sold at a variety of prices, and for those who are friends with a soldering iron, there are many schemes on the Internet that are offered to be soldered by yourself.

For a ready-made "winder" they often ask for several thousand rubles, but in order to solder it yourself, you still need to purchase radio components and spend some time on assembling the device. You don't want to waste money or time? And it is not necessary! At the numerous requests of drivers, a special revolutionary way of winding a speedometer using a conventional computer fan was developed in the workshop of a wandering locksmith.

We will need a computer fan "cooler", which has 3 wires. Absolutely any fan with a 3-wire connection is suitable, from a power supply, from a processor, from a video card - from anything. Such a fan has a Hall effect tachometer inside, exactly the same as it is in car speed sensors.

We take such a fan, remove the connector from the speed sensor and connect the fan according to the diagram. The speed sensor in the car is on the gearbox, and in 4x4 jeeps - on transfer case. We remove the connector and connect the fan instead of the speed sensor, turn on the ignition and let's go! The fan should start spinning, and the speedometer should wind up kilometers. The purpose of the pins of the speed sensors of most cars is shown in the diagram, do not forget that the "mothers" of the connectors are mirrored, to ensure correct connection, check the "plus" and "ground" contacts with a tester, when the ignition is on, they should be + 12 volts.

Do you have everything sealed and the connector can not be removed? Don't worry, we've thought about that too! Extend the power wires from the fan so that they are enough to the battery and connect the fan to the battery directly. Attach a needle to the signal wire of the fan and, in an inconspicuous place, carefully pierce the insulation of the signal wire from the speed sensor, connect the fan signal in parallel. But with this method of winding, you will have to tinker a little. The fact is that the sensor outputs are made according to the "open collector" scheme, and if the magnets in the standard sensor are in the position when the output key of the speed sensor is open, then the winder will not be able to work. What to do? It is necessary to catch the moment when the key of the standard speed sensor closes, and only then start the winder. How to do it? The surest option is to jack up the rear wheel and gently turn it to catch the moment when the winder starts to work, but you can try and push the car a little bit, although this can be difficult. Do not forget that in any case, the ignition must be turned on in order to start the speedometer itself.

Please note that different fans have different rotation speeds, the speed of the fan is written on the sticker, naturally, the faster the fan, the faster you can wind the desired readings, but meanwhile, some speedometers have begun to meet protection against too impatient, and at too high winding speed the speedometer stops reading. What to do in this case? Just find a slower fan.

Where can I get the right fan? Yes, anywhere, pick it out of a faulty computer, ask a friend, find it in a garbage dump, buy it in a store. There are coolers in any computer store, the price for them starts from 100 rubles, and finding a fan is much easier and cheaper than buying or soldering a winder.

And that's... Don't steal too much, okay? :)

The universal speedometer knob belongs to the class of auxiliary electronic devices used to change the readings of a standard car odometer. This device simulates the mode of movement of the car, winding up the values ​​​​of kilometers traveled, recorded by the vehicle's odometer. It should be remembered that it is impossible to reduce mileage using this device.

There are many different modifications of such automotive devices. This device belongs to the class of universal devices suitable for most brands. modern cars. This feature is achieved due to two important design points. Firstly, the odometer is controlled via the vehicle's CAN bus by connecting via the universal OBD diagnostic socket. Secondly, control signals for many brands and models of modern cars are written in the basic electronic firmware of the device.

How does the device work?

The operation of the device is quite simple:

• With the engine turned off, connect the twist to the diagnostic connector.
• Switch on the ignition and start the engine.
• The indicator of the device after a short flash should light up constantly, indicating the inclusion of normal operation.

The odometer winding speed control is controlled visually. It should be remembered that this device must not be used while driving. Failure to comply with this requirement will lead not only to damage to the device, but also to possible failure electronic system car.

The device is configured for a specific vehicle model during the initial connection to the CAN bus. This setting must be carried out without fail with the power supply on, but the ignition off. The device is supplied with a list of modes corresponding to certain brands of vehicles. Having determined the desired number of the required mode, you should press the button located on the device body and insert it into the diagnostic OBD connector, while keeping the button pressed. The indicator on the device will light up for a few seconds, determining the connection to the CAN bus, after which it will begin to flash periodically. It is necessary to count the number of LED flashes, the number of which corresponds to the number of the mode into which the device switches. When the desired number of flashes is reached, release the button. The device will be in the selected mode corresponding to the required brand of car. After this procedure, you can turn on the ignition and control the vehicle's odometer.

Advantages of a universal twist

The advantages of this type of device are:

• Ease of use thanks to the connection via the OBD diagnostic socket.
• No additional electrical connection required.
• Universality of application on various brands of the car.
• The absence of errors in the electrical system of the vehicle and, as a result, the use of the device is not detected when diagnosing a car at the stand.
• It affects only the odometer, other service intervals are not affected and show the necessary information.

The use of such devices in our country is not regulated by any legislative acts, which ensures complete legal security when using them.

How is the speedometer knob connected?

The device is connected via a diagnostic connector (via CAN bus), located in a place accessible to the driver in the car. The connection is carried out without interfering with the wiring.

In all blocks, the mileage on the car is recorded?

The mileage is recorded in all blocks of the car. The cheat cannot be determined on TO, service centers, nor any professional equipment.

Is adjusting the speedometer safe for the car's electronic system?

100% safe. We guarantee. Krutilka accurately interacts with the electronics of the car. The device was created with the aim of solving your problems, and not creating new problems.

Does the speedometer dial drain the battery when the ignition is on?

Our device consumes a minimum of electricity, comparable to the costs of the charger.

Will they explain to me how to use the twist?

Certainly. Before buying, our specialist will show you how to use the twister and answer all your questions. Then you can make payment.

What will be the winding speed of the run when the twist is connected?

The winding speed of the brand and model of car, and ranges from 200 to 14.000 km / h, the speed depends on the brand and model of the car. On machines with tachographs, the speed can be adjusted between 0-180 km/h.

What is the difference between DIAGNOSTIC CONNECTOR (OBD2) and CAN bus?

In simple terms:

Diagnostic connector (OBD2) - this is the connector that you see. It is the same on all machines. Used to connect to car diagnostic equipment, hence the name. It is located in the cabin, always in an accessible place (most often under the steering column or next to it).

CAN bus is a system enclosed in wires. This system makes it possible to diagnose, simulate, interact with certain sensors in the car, by connecting via the Diagnostic Connector (OBD2).

Roughly speaking: The diagnostic connector (OBD2) is a piece of plastic, and the CAN bus is wires. Often, drivers call the Diagnostic Connector (OBD2), CAN bus, but this is not the same thing. There is a diagnostic connector on all machines without exception, but the CAN bus is not.

On what principle does the spinner work?

Depending on your car, the device can work according to 2 principles:

- Connect to the diagnostic socket (OBD2). The device simulates the movement of the car, increasing the mileage accordingly.

Connect to a speed sensor. To the wire going from the box to the dashboard. The device generates a pulse, sending it to the speedometer.

Is it legal to twist or wind up mileage?

Yes, it is not prohibited by any law of the Russian Federation. It's legal.

How does it work? What data is being transmitted? Why does the mileage increase at all?

When you connect the twist to the OBD2 connector, it CAN bus sends mileage information to the odometer. Odometers calculate mileage using a speed sensor - for every kilometer they generate about 6004 electrical impulses and thus determine the distance traveled. The krutilka itself creates these impulses, deceiving the odometer.

How to find the OBD2 diagnostic socket in my car?

The OBD-II connector is most often located near the steering column, or within reach of the driver. If you did not find it, then call +7 968 ​​365-38-28, we will prompt.

“No matter how much you steal from the state, you still won’t get yours back!”

With the development of injection systems on domestic cars, there has been a steady demand for devices that "wind up" electronic odometers. Why is this necessary, you ask? The answer is obvious: for drivers of state (official) cars, this is a way to write off gasoline. And, as you know, now it has become expensive ... Previously, when only mechanical odometers existed, this problem was solved in different, also mechanical ways. Then the first electronic odometers appeared, and the "advanced electricians" of various car depots found a simple and effective way to wind odometers by stretching the wire from the additional terminal of the generator to the instrument panel. But the electronics did not stand still, and when, having once connected the magical wiring in the manner described above, the electrician discovered that the car would not start, there was nothing left to do but send the suffering driver to look for other ways to solve the problem.

And it all started with the usual Gazelles and Sables with 405 engines, of which there were enough divorced at our city-forming enterprise. It was they who began to stall when using the above method.

The fighting technique is very simple and effective. The Combiloader PAK is connected to the ECU of the experimental car and the serial engine control program is read. Further, it opens in the CTPro program and the flag of the speed sensor is removed from the configuration. And with such a small change, an already modified engine control program is written to the ECU. In principle, after that, you can call an “advanced electrician from the car depot”, who will throw a magical wiring from the generator and the process, as they say, will go ... But this is not our method.

The simplest three-piece generator is made using the bulk mounting method (see the diagram below).

Toggle switch S1 switches the signal going to the panel either from our generator or from a standard speed sensor. The generator is powered from the plus of the ignition switch. Thus, the main advantage of this solution is that you can wind up the mileage without starting the car (just turn on the ignition), as well as right on the move of the car “moving at a speed of 200 km / h” to the envy of colleagues in the fleet.

A few notes on the diagram. Of course, a fastidious electronics engineer will definitely recommend putting another resistor in series with a trimmer so that the generation does not break down in the extreme left position of its engine. And also necessarily a protective diode against reverse polarity of the circuit. But you and I do not need it, we are neat, attentive and unhurried. With the values ​​​​of the resistor and capacitor indicated on the diagram, the circuit generates rectangular pulses with an amplitude of 12 volts in the frequency range from ≈ 180 Hz to ≈ 1.5 kHz, which has so far covered the need for using this device on different cars.

If you need to quickly change the range of generated frequencies, you need to replace the capacitor. When it decreases, the frequency increases and vice versa.

Another generator schema provided for publication by Yvm.

Below is a table that describes the car, with our personally modified odometers.

car model	Year	Brief description of the installation
Gazelle	since 2002	Connector X3 instrument cluster: Pin 11 green wire - signal DS. Yellow wire - + ignition. Black wire ground.
Kia Magentis Hyindai Sonata	2004	There is a speed sensor, the usual three-wire, large instrument cluster connector, view from the side of the contacts, brown wire.
		There are three connectors on the instrument cluster: yellow big; white big; white small. In the white large connector with an arrow in the figure DS wire is indicated, view from the side of the contacts, gray wire with a brown stripe.
Forg Tourneo Connect (in principle applicable to Mondeo, but not tested)		There is a speed sensor, the usual three-wire, but its signal goes to the computer, and already from the computer via a digital bus is transmitted to the control panel. Therefore, I had to tear white wires with a blue stripe to pin No. 3 of the ECU.
Volvo S70	1997	There is no speed sensor, the signal to the tidy comes from ABS, it is a 6-volt sine. Therefore, our device was powered from the simplest stabilizer with an output voltage of 6 Volts, such as KR142EN5B (or any low-power imported analogue) and it already had 6-volt rectangular pulses at the output, which the device easily “digested”. On the panel, connector A is top-right. 3 pin - blue wire - speed input signal 15 pin - brown wire - ground 18 pin - blue with a red stripe - + ignition.
Toyota Camry	2003	Large instrument cluster connector, pin 35 - wire with ABS and speed information. If you look closely, there is a numbering on the wires. (Many thanks to Coldun for help)
KAMAZ
MAZ		Attention! +5V (middle top contact) comes out of the device! Protect against short circuits when applying voltage. Winds up to 5 kHz.
UAZ Patriot
UAZ Hunter		Wound up to 1 kHz
Renault Logan"	2005	7 - black, ground 10 - yellow: 15 ignition lock terminal 22 - green: speed sensor
Mitsubishi - Pangero diesel	2005	There are three connectors on the panel - one black (the first to the left of the driver's door) and two white ones. On the black connector, the rightmost wire (yellow-white with silver rings) is DC. Any winding device at the output with an open collector (for example, a device for checking the DS circuit, given in the article by Oleg Bratkov). Of course you still need a switch.
RenaultKANGOO		Behind the dashboard there are two connectors - gray (two rows) and red (single row), pay attention to red: 15 pins, 6 are involved: 2 - lilac 10 - brown (1) 11 - green (1) 12 - yellow 13 - brown (2) 15 - green (2) Pinout from left to right; from the center of the panel (gray connector) to the edge. We are interested in the 13th - brown (2), he is responsible for the speedometer readings and the odometer score. He gave a rectangle ~ 500 hertz, a duty cycle of 50%, a classic generator circuit for the 561 series, turns over 200.
Mazda Tribute (aka Ford Maverick, Escape), American.		Connected directly to DC. DS is two-wire, stands on the automatic transmission closer to the engine shield. The generator is ordinary at 561le5, only a capacitor (0.1 μF, ceramics) must be placed in the output gap of the speed signal, apparently a sinusoid signal is required there. Calmly shakes at a speed of 250 km / h, then there is a breakdown. The check does not light up.
HYUNDAI Santa Fe	2007

In conclusion, we denote an approximate algorithm for searching for one single, necessary wiring through which information about the mileage is sent to the instrument panel odometer.

1. Inspection of the gearbox, drives, rear axles in order to detect a speed sensor.

2. If the speed sensor (or something similar to it) is detected, then you need to make sure that it is it. Remove the connector from it and make a small test drive. The speedometer or odometer should stop working.

3. If the detected speed sensor is three-wire, then it is necessary to measure the voltage at its connector and determine the signal wire. Next, ring this signal wire to the instrument panel in order to connect the winder in the cabin. If the sensor is two-wire, then it is necessary to determine the shape of the signal that comes to the panel. This can be done by hanging the drive wheels and making them spin, control the signals coming to the panel with an oscilloscope.

4. If the speed sensor is not found in point 1, then it is very possible that the panel receives a speed signal from the ABS. Then, using the method described in paragraph 3, it is necessary to search for this signal with an oscilloscope, on the instrument panel connectors.

Of course, if you have detailed information materials on the car model that you are going to subject to such “tuning”, then the task is greatly simplified. But in any case, do not forget that you are acting at your own peril and risk, and therefore double-check yourself three times before thoughtlessly “strapping something to something”. I would also like to note that this brief review highlights the general principles for solving this problem, and the specific implementation on a specific car can vary greatly in the direction of complication. If you have information on connecting to other types of cars, send us, we will gladly fill up the table of "applicability"

Some notes on creating winders for Ford Mondeo & Ford Focus, 2006 release, Toyota Camry

These vehicles use signals from the ABS sensors as a speed signal. On these models, these sensors are current, which means that when the wheel rotates, the current in the circuit changes. The changes are approximately 7/14 mA, that is, if you connect the oscilloscope in parallel to the sensor until the wheel rotates, we should see a square wave of approximately 0.5 Volts against a background of 12 Volts. The circuit below simulates the complete operation of such a sensor.

The positive wire can be determined by removing the connector from the sensor and measuring the voltage on the wiring with the tester with the ignition on. We used full manual reconnection, that is, to carry out winding, the client opens the hood, removes the plugs from the connectors, and puts the winder in place of the plugs. Turns on the ignition, produces the necessary winding. After the end, he removes the winder from the connectors, and plugs the plugs into the connectors, which restore the factory connection of the ABS control unit with the sensors. Of course, it was possible to switch all this on the relay, but there were a lot of extra wires under the hood, and disguise was put at the forefront. It is imperative to use two wheels, since with one the speed does not rise above 30 km / h.

Now consider the car TOYOTA CAMRY, 2006 model year. The panel of this car is called Optitron, and has neon lights. Machine 3.5 liters on the machine. The speed signal is also taken from the ABS sensors, but is a sine wave with an amplitude of about 1 Volt and a frequency directly proportional to the rotation speed. That is, the ABS sensor is applied inductive type. In this case, the following scheme was applied. The transistor is applied to any type of KT3102. A resistive divider reduces the amplitude of the output signal, and a capacitor with a capacitance of 0.1 μF to 0.47 μF removes the constant component of the signal. As a result, of course, a clumsy signal was formed at the output, but the block ABS controls he swallowed it perfectly and the desired result was obtained. It should also be noted that such a signal must be applied to the two front wheels. True, in this case, complex switching was not required, and the necessary signal wires were tied directly to the standard wiring.

In conclusion, I would like to remind you that ABS is one of the important systems that affect safety, and if you have already decided to intervene in it, you must clearly understand the consequences and, in accordance with this, perform work at the proper quality level.

A small addition to the "KAMAZ" odometers. This device can easily be adjusted to "incorrect" readings using

If you buy a used car, then in most cases the total mileage of the car is rolled up. To the question, "what is such a small mileage?" the answer always consists of the tags "girl, summer operation, grandma, grandpa, standing, before giving, work 5 minutes", etc.

Naturally, I will not describe the winding process, but I will show the consequences and traces.

In fact, winding up an electronic odometer is very easy and fast. The tidy controller chip is responsible for reading the mileage numbers, which receives information from the vehicle speed sensor, analyzes it and calculates the distance traveled. This information is stored in a separate non-volatile memory chip. The microcircuit of this memory is not protected in any way, its information can be read and changed, make your own adjustments.

A specific example, my tidy, top view of the printed circuit board:

It shows a small octopod memory chip, the same one installed in many cars from many automakers. The memory capacity of this chip is scanty in terms of computer size of 1 kilobyte, but this is quite enough to store all the necessary tidy data. This microcircuit is soldered, connected to a computer and the readings are taken. There are options without soldering this chip, just connect the wiring to it from above.

And here are the traces of soldering, in order to get to them you need to disassemble the entire tidy and get to the other side of the printed circuit board:

You can see the memory pins sticking out of the board. But if you look closely at them, you can see traces of handicraft soldering:

So I never look at the odometer when buying a car in the secondary market, it's still rolled up.

You can check whether the mileage is wound up or not by establishing traces of opening the tidy. Traces on the screws, regular clips, traces of opening in the form of notches, fingerprints on a layer of dust, indicate that they climbed inside. They climb in two cases: to wind up or repair-re-exposure.

In my car, this is the only way to wind up. But there are, of course, many other cars, especially modern ones, where there is a struggle between design engineers and hackers - winders. The former are developing complex odometer memory schemes (several storage locations, access complexity, hacking analysis algorithms), the latter are looking for clues and approaches to bypass these obstacles.

All discussions about winding: where, why and how will be deleted.

Sometimes, when operating a car, it becomes necessary to correct the speedometer readings upwards, in simple terms, "wind up the readings." In order to do this, a large number of different devices are currently being sold at a variety of prices, and for those who are friends with a soldering iron, there are many schemes on the Internet that are offered to be soldered by yourself.

For a ready-made "winder" they often ask for several thousand rubles, but in order to solder it yourself, you still need to purchase radio components and spend some time on assembling the device. You don't want to waste money or time? And it is not necessary! At the numerous requests of drivers, a special revolutionary way of winding a speedometer using a conventional computer fan was developed in the workshop of a wandering locksmith.

We will need a computer fan "cooler", which has 3 wires. Absolutely any fan with a 3-wire connection is suitable, from a power supply, from a processor, from a video card - from anything. Such a fan has a Hall effect tachometer inside, exactly the same as it is in car speed sensors.

We take such a fan, remove the connector from the speed sensor and connect the fan according to the diagram. The speed sensor in the car is on the gearbox, and for 4x4 jeeps - on the transfer case. We remove the connector and connect the fan instead of the speed sensor, turn on the ignition and let's go! The fan should start spinning, and the speedometer should wind up kilometers. The purpose of the pins of the speed sensors of most cars is shown in the diagram, do not forget that the "mothers" of the connectors are mirrored, to ensure correct connection, check the "plus" and "ground" contacts with a tester, when the ignition is on, they should be + 12 volts.

Do you have everything sealed and the connector can not be removed? Don't worry, we've thought about that too! Extend the power wires from the fan so that they are enough to the battery and connect the fan to the battery directly. Attach a needle to the signal wire of the fan and, in an inconspicuous place, carefully pierce the insulation of the signal wire from the speed sensor, connect the fan signal in parallel. But with this method of winding, you will have to tinker a little. The fact is that the sensor outputs are made according to the "open collector" scheme, and if the magnets in the standard sensor are in the position when the output key of the speed sensor is open, then the winder will not be able to work. What to do? It is necessary to catch the moment when the key of the standard speed sensor closes, and only then start the winder. How to do it? The surest option is to jack up the rear wheel and gently turn it to catch the moment when the winder starts to work, but you can try and push the car a little bit, although this can be difficult. Do not forget that in any case, the ignition must be turned on in order to start the speedometer itself.

Please note that different fans have different rotation speeds, the speed of the fan is written on the sticker, naturally, the faster the fan, the faster you can wind the desired readings, but meanwhile, some speedometers have begun to meet protection against too impatient, and at too high winding speed the speedometer stops reading. What to do in this case? Just find a slower fan.

Where can I get the right fan? Yes, anywhere, pick it out of a faulty computer, ask a friend, find it in a garbage dump, buy it in a store. There are coolers in any computer store, the price for them starts from 100 rubles, and finding a fan is much easier and cheaper than buying or soldering a winder.

And that's... Don't steal too much, okay? :)

Why odometer manipulation is popular in Russia

If you believe the statistics of "AUTOSTAT", a car whose age is approaching 10 years, "winds" 18,000 kilometers of annual mileage. And, of course, anyone who wants to buy a car that is not the first freshness hopes to find the least “driven” option. Sellers in such cases go to buyers "to meet".

Psychology

In the market and various sites, you can often find ads for the sale of cars 5-7 years old with a mileage of 30 to 70 thousand kilometers. Somehow this does not really converge with the data of Avtostat. The inconsistency is explained simply - more than half of used cars have elementary mileage adjusted to psychologically comfortable marks. In other words, just twisted.

By the way, if not half of car owners, then a good third for some reason believe that the “thing” where the mileage numbers are shown is called a speedometer. Like, he alone is responsible for both speed and mileage. In fact, the odometer is responsible for the mileage. We'll talk about him.

How is it arranged?

Initially, a classic mechanical odometer was installed on cars. On foreign cars, he lasted until the end of the last century. In the domestic auto industry - a little longer.

The mechanical odometer is a standard digital meter with a large gear gear ratio. In order for one of the numbers to give way to another, the input shaft must “spin” about two thousand times.

Such an "old school" odometer is connected to the gearbox output shaft with a special cable. As the gears turn, the mileage gradually increases.

In the modern "smart" odometer, this "primitive" is no longer there. Directly on the output shaft or wheel (depending on the car) is a sensor that takes into account the speed. There are two types: optical or magnetic. The sensor sends the received data to the electronic control unit. And that, in turn, highlights them on the dashboard display.

By the way, it happens that information about the distance traveled is duplicated in different control units. And sometimes even in the ignition key.

On "fancy" "Bavarians" or Land Rover, which are traditionally considered the most "stubborn" cars in terms of twisting mileage, there may be about ten such data stores.

How is mileage rolled up?

It is clear that we will not describe this procedure in detail. Let's just briefly explain how this happens.

mechanical odometer

To correct the kilometers traveled on it, two methods are used. In the first case, it is necessary to attach some kind of electric motor or, for example, a drill to the input shaft of the meter. With their help, the odometer can be twisted in the opposite direction.

The problem with this method is that it takes quite a lot of time to “wind up”. Craftsmen sometimes have to sit for hours with a drill in their hands and persistently “buzz” in order to see the cherished numbers.

The second option is that you just need to “tear apart” the odometer, and then assemble it back, setting the required mileage.

Electronic odometer

It is adjusted with the help of electronic devices. If we are talking about simple, cheap cars, just unscrew the dashboard cover. Then the odometer is connected to a computer, where a special program will allow you to set the desired mileage. After manipulations, the lid is screwed back - and it's in the bag. About the "crime" can only be reported by screws scratched with a screwdriver.

If there are backup “storages” in the car, mileage adjustment will not be much more difficult. It is enough to connect to the on-board computer and delete information from the reserves. If necessary, the ignition key can be "cleaned" using "flashing".

By the way, if the "master" overlooked - did not delete information from all blocks - then after a while old data may appear on the odometer. This is going to be a surprise.

Well, for "fancy" cars there is another method - a more radical one. A special microcircuit is “implanted” into the block, with which you can set any numbers you like.

Now there is not a single car that could not be corrected for mileage. And it doesn't matter if we are talking about Logan or Hammer. And all to the fact that automakers do not bother about the protection of mileage information. In fact, it doesn't concern them. After all, who cares about the problems of secondary buyers ?!

Issue price

Such manipulations with odometers are inexpensive. If you set a goal, in the "garages" you can find specialists who will deal with a mechanical device quickly and for a maximum of a thousand rubles.

Correction of the simplest electronic odometer will cost 1,500-2,000 rubles. Well, then it's clear. The more complex the mechanism and protection, the higher the price.

How to determine that the mileage is twisted?

In fact, it is quite difficult to find out. If specialists, and not the garage "Uncle Vasya", were engaged in the adjustment, most likely it will not work to find "traces of the crime".

Only indirect “evidence” can help - pedals that are too worn for the declared mileage, shabby upholstery of the steering wheel or seats. But we must not forget (especially when it comes to a budget car) that covers and pads themselves are cheap and low quality. Therefore, they can lose their presentation quickly.

Outcome

By and large, mileage in itself is not a 100% indicator of the wear and tear of the “steel horse”. For example, in the same Germany or France, car owners calmly wind up under 200 thousand kilometers - and they don’t know grief. True, they do not forget to call in the service station in a timely manner for prevention or minor repairs. Therefore, European cars, even with solid odometer readings, are quite decent quality.

On the other hand, it is clear that an indifferent, sloppy and stingy driver can easily bring the car to the "zugunder" and for several tens of thousands of kilometers. Therefore, you need to pay special attention to the general condition of the car, and not just the odometer.

The mileage of the car reflects the real state of affairs and the greater the mileage from zero, the sooner the repair will come, and the repair is a cost, sometimes quite large. Therefore, this is an important indicator that directly affects the cost of the car being sold. Agree that the displayed numbers of the speedometer (odometer) of miles and kilometers traveled rarely reflect the actual state of affairs.

For some reason, in Russia it is not customary to show real kilometers. Probably, such a mentality makes it necessary to bring the mileage to, to put it mildly, not very honest indicators. And, oddly enough, there is an explanation for this.

In distant fabulous times, when there was still the country of the USSR, as well as post-perestroika devastation, and our auto industry, it produced the latest technology of the Zhiguli, and the Volga and Moskvich like it, the quality of these cars left much to be desired. It was probably easier to fly somewhere into space than to get the necessary spare parts for the repair of this equipment, including parts for repairing the engine.

And, as you know, experienced motorists, after a run of 100-120 thousand kilometers, this miracle, called a car, required a serious engine repair. Replacing the clutch, not talking about the chassis, as well as the fallen compression and the engine that smokes, asking for a "capital".

Yes, you can’t sell such a car with such mileage ...
Here, a “smart thought” comes to the puzzled head, twist the speedometer… And now, on the instrument panel, the desired mileage! Here, probably, is the answer - why in Russia they twist the mileage.

Sell ​​a used car that doesn't make the buyer think that it's time for repairs.

But simple mechanical speedometers have become less and less installed by manufacturers on their cars, even in the domestic auto industry. They were replaced by more complex electronic devices, which the language does not even dare to call the simple word "odometer". Twisting runs has become more and more difficult and, accordingly, more expensive!
But will this stop an inquisitive Russian specialist?

Modern speedometers can be classified according to the following parameters:

• Mechanical (well, everything is clear here, the numbers on the speedometer are spinning by means of a mechanical drive - a cable).
• Electromechanical (the drive is carried out by an electric motor and an electronic circuit).
• Electronic (data from sensors come in digital form).

Correcting the car's mileage in the right direction sometimes requires not only the knowledge of an electronics engineer, but also a programmer.

Now, the kilometers traveled is recorded in the electronic memory of the speedometer, and can also be duplicated in various brains and vehicle modules. Somehow: in the ignition key, ignition lock, immobilizer, automatic transmission and in the control unit (brains).
And these blocks, in turn, can be linked to a specific car through the VIN number.

In connection with the foregoing, it is already possible to roughly determine the methods of twisting (correcting) the speedometer or, as it would be more correct, the odometer for a given make and model of a car and how much it can cost.

The easiest way, of course, is mechanical, applicable to old models of the domestic auto industry and some foreign cars, and usually does not cause problems, and also does not require special knowledge.

Further, the help of a programmer will already be required, this is in the case when you need to reprogram the memory chip on an electromechanical speedometer. This chip contains all the data on the total and daily mileage of a given vehicle. This is done something like this: by directly connecting a programmer and preferably a programmer to the microcircuit.

You can connect and correct the mileage on the electronic speedometer through the connector on the instrument cluster or directly through the vehicle diagnostics connector.

Connecting a computer through a diagnostic block is the most convenient way (it does not require dismantling the instrument cluster), but on the other hand, a special program on the computer is required, which is available only to official dealers and service stations of this brand.
But as far as we all know, this is not a big problem in Russia.

But, the presence of several brain blocks with prescribed mileage this car, makes flashing many memory chips practically impractical and economically unprofitable.

Output: Twisting the speedometer of a modern brand new car is expensive. The cost of such editing of brains can be comparable to a discount on total price car on sale.