Winding up the KamAZ speedometer: connection diagram, how to wind it, pinout, winder

The KAMAZ speedometer knob is designed to independently increase the vehicle's mileage. The device cannot in any way reduce the mileage of the car!

The winder is intended for cars of the following modifications:

• Kamaz 65… Euro4 without tachograph
• Kamaz 65… Euro5 without tachograph

These models are equipped with a new instrument panel “Itelma” or “Elara”. Appearance as in the photo.

The device is connected to the OBD2 diagnostic connector without additional wires. In this case, two conditions must be met: the car must not have a tachograph installed. And the diagnostic connector should be located on the right side of the glove compartment (not at the steering wheel).

The Kamaz OBD2 rewind allows you to rewind the mileage and engine hours only on a car without a tachograph . If you have a tachograph, the mileage will remain the same, only the engine hours will change.

• In rare cases, when the tachograph is installed in such a way that it does not provide a speed signal to the speedometer, the winder will affect both mileage and engine hours. However, it will still not wind up the tachograph.
• An important point and indicator of compatibility is the location of the obd2 diagnostic connector. For KamAZ vehicles Euro 4 and Euro 5 (environmental class), it is located on the right in the glove compartment. The connector is 16-pin, trapezoidal.
• For the Euro3 model, the connector is located on the left side of the steering wheel.

To rewind the speedometer of KamAZ Euro3 and KamAZ with a tachograph, a pulsed device is used in the cigarette lighter. It also requires modifications to the car's wiring. If you mistakenly ordered the wrong option (or mistakenly received the wrong option), be sure to contact technical support (best via WhatsApp), we will definitely make a replacement or refund! The main thing is not to panic.

Please review the frequently asked questions (and answers) included in this guide!

About types of speedometers

Before figuring out how you can change the readings of such a device with your own hands, you need to consider its possible options. There are several fundamentally different types of speedometers:

• mechanical;
• electromechanical;
• electronic.

Mechanical speedometer

The gearbox speed is transmitted directly to the device by a cable. There the number of revolutions is measured and converted into the distance traveled. For this, a gearbox with a pre-selected conversion coefficient is used. The photo will help you understand how this is done.

In fact, it turns out that one revolution at the output of the gearbox corresponds to a certain number of meters of the distance traveled. This rotation of the output shaft is perceived by special disks (indicating device) with printed numbers displaying the measured distance.

Electromechanical speedometer

This type of device is a further development of the previously described device. In many cases the cable was the source of increased error and was replaced. A speed sensor installed on the gearbox was inserted into the device. Impulses from it were sent to a motor with appropriate control that rotated the gearbox. Otherwise, the operation of such a speedometer was no different from a mechanical one, resembling it in appearance.

Electronic speedometer

A similar type is installed on modern cars. In this case, the number of wheel revolutions is measured. Knowing the length of its circumference, it is not difficult to convert the number of revolutions into the distance traveled. The result obtained is displayed on the LCD.

KamAZ speed sensor pinout

The speed sensor affects the amount of fuel supplied, as well as the amount of air that flows past the throttle valve. All these factors will affect the speedometer readings, therefore, for its connection and further proper operation, it must be carried out strictly in accordance with the diagram.

Pinout is a digital designation of connector functions, necessary for the correct order of connecting various parts and cables.

Modern KamAZ models, for example, 65115, are powered by Euro-3, Euro-4 and Euro-5 engines. Trucks with such engines are most often equipped with contact sensors located at the gearbox. The sensors on KamAZ of the Euro series are recognized as the most reliable in comparison with other models.

The principle of operation of the speed sensor is based on the supply of an impulse from the rotating wheels, which, when entering the device, is converted and, through the clutch with the speedometer, displays a certain numerical value on the LCD.

If the speed sensor is faulty, there may be problems with the engine idling, the car may not. In this case, the gearbox and speed sensor need to be replaced. You can independently configure the speedometer and motion sensor only in accordance with the pinout:

Important Features of operation and maintenance of hydraulics on the MTZ-82 tractor: device, diagram, what to do if it breaks

Why do they change the speedometer readings?

As already noted, drivers sometimes have to change the speedometer readings. In this case, the mileage is made both less and more. And if in the first case everything is clear - reducing the distance traveled when selling a car increases its price, then about the second it is necessary to make several explanations.

Rewinding the speedometer is possible for several reasons, for example:

1. To increase fuel and lubricant costs. Higher mileage allows you to write off more fuel. And this is not necessarily associated with fraud and postscripts. The fact is that in an old, worn-out car, fuel consumption sometimes exceeds established standards. So you have to compensate for the increased costs in this way.
2. When replacing the engine or instrument panel. In this case, it is necessary to bring the speedometer readings in accordance with the new conditions.
3. When using discs other than those recommended by the manufacturer. Their diameter can be either larger or smaller than that specified for a standard wheel; therefore, when calculating the distance traveled, a constant error will occur. Here, winding the speedometer allows you to eliminate it, including doing it yourself.

Why twist the speedometer?

Mileage is an important indicator of the technical condition of a vehicle. Car owners use it as a guide, determining the time for replacing parts and consumables, and undergoing regular maintenance.

It is one of the main guidelines when buying a used car. It's no secret that many unscrupulous sellers very often “adjust” the mileage, shamelessly reducing the odometer readings. Of course, they can be understood. After all, the lower the number on the speedometer, the more expensive you can sell your car.

Surprisingly, they also wind the speedometer in the opposite direction - increasing its readings. This is what drivers of official and commercial vehicles do. The fuel consumption standards included in the budget of enterprises do not in any way cover the real costs of fuel. And they certainly don’t take into account the depreciation of vehicles. So the “poor” drivers resort to all sorts of tricks in order to “restore justice.”

How is the speedometer adjusted?

How to wind up a mechanical speedometer?

Similar devices are installed on old cars, for example, the VAZ or UAZ family of early years of production. In this case, you can act in several ways. The simplest thing is to disconnect the cable from the speed sensor, connect a drill to it, and switch it to reverse mode and change the readings. Another approach is to disassemble the instrument panel, remove the meter, and use the necessary tools to change its readings.

This kind of work can be done with your own hands. However, this is only available on cars of older years of production (before 2005), and its brand does not really matter - VAZ, KAMAZ, UAZ, MAZ or Gazelle. The type of speedometer will be decisive.

How to adjust an electromechanical speedometer

Despite the fact that these types of devices remained only on old machines, working with them is much more difficult than with purely mechanical ones. Here, as in other situations discussed below, it is necessary to separate two tasks:

• rewinding the speedometer - increasing its readings;
• twisting the speedometer means decreasing the instrument readings.

In principle, both of them can be done with your own hands, only the approach in each of the cases under consideration must be different. Reducing the readings is only possible by disassembling the panel, removing the counter and manually rearranging its values. But the problem of how to wind up a speedometer of this type can be solved by using a generator. It generates pulses arriving at the control input, and the readings of the device change according to their number. As in the previous case, this also does not depend on the brand of the car - VAZ, KAMAZ, UAZ, MAZ or Gazelle.

How to wind up an electronic speedometer

» alt=»»> Such devices are installed on modern machines and are often an integral part of other electronic systems on board. Specific methods for adjusting speedometer readings are determined primarily by the production time of the car. The fact is that the electronic speedometer can be implemented in different ways and interact with several independent devices.

Therefore, to change its readings, it may be necessary not only to supply additional pulses from speed sensors, but also to reprogram some blocks. And besides, again, depending on the characteristics of the car, for different models of UAZ, VAZ, Gazelle, etc., as well as the year of manufacture, the method of accessing the speedometer will be determined.

Repair

The main malfunctions of the heat exchanger are loss of tightness of the tube bundle and a decrease in the power of the device due to silting of the flow part of one or both cavities. In case of such breakdowns, the functionality of the device is restored by cleaning, welding or plugging the tubes. However, sometimes defects arise when their elimination is impractical. In such a situation, an aggregate replacement of liquid metal parts is carried out.

In most cases, a leak in a pipe system occurs in the area where the heat exchange tubes are attached to the end flanges. Signs of a leak are the appearance of an oil suspension in the engine cooling system. The locations of detected defects are sealed. If the fistula appears in the tube itself, then it is plugged. No more than 10% of the cooling elements are allowed to be taken out of service. After the malfunction is eliminated, the heat exchanger is pressurized, thereby checking the quality of the work performed.

https://youtube.com/watch?v=Q9Z88g5zSY8

In most cases, descaling of tubes is carried out mechanically using a roller cutter or special screw attachments installed in a drill. If it is impossible to clean the liquid solids in this way, chemical washing is carried out using washing liquids. To do this, use a 5% aqueous solution of hydrochloric acid. The core is soaked in it and left in this state for 30-40 minutes. After this, the part is thoroughly washed in a 3% sodium bicarbonate solution.

Cleaning is carried out until the dirt is removed. After this, the core is washed with hot water and dried well (blown with air).

During any disassembly of LMC, it is necessary to install only new gaskets.

What devices are used to wind electronic speedometers?

Considering the variety of cars available and methods for processing data from the speedometer, several different options have been created that allow you to correct the distance traveled. The circuit of such a device can be made both on discrete elements and on microprocessor systems, but all finished products are divided into the following types:

CAN twister

This device is designed for use on modern machines. Here you need to know that CAN is a special bus through which data is exchanged between car electronics units. And its design implies the presence of a diagnostic connector, through which, knowing the exchange protocol, you can gain access to individual devices.

Accordingly, thanks to this, you can adjust the contents of the necessary memory cells, achieving the desired result. It is impossible to detect with diagnostic equipment that memory cells have been changed.

You can buy a high-quality spinner on the website https://can-podmotka.ru

Pulse twister for OBDII

This device is intended for use with foreign cars that do not have a CAN bus. This device is connected via a special OBDII diagnostic connector. In this case, the speedometer receives a sequence of pulses simulating signals from the speed sensor, as a result of which the readings of the distance traveled change.

Speed ​​generator

This circuit simulates a speed sensor. Instead, the generator turns on and produces a sequence of pulses that arrive at the speedometer and cause its readings to change. Mostly suitable for electromechanical devices and domestic cars - VAZ, UAZ and others manufactured before 2006.

ABS speedometer knob

Suitable for cars equipped with ABS. Its work is based on controlling the speed and rotation of the wheel. A spinner connected to the corresponding connector simulates the operation of the wheels, and the controller, receiving this information, begins to change the speedometer readings.

You can make a winding device yourself or buy a ready-made one, but the most important thing is to determine whether it can be used on a given machine. If used incorrectly, you can simply burn the electronics.

As strange as it may seem, sometimes it becomes more important not to twist the speedometer, but, on the contrary, to wind it up. There are a number of reasons, both objective and subjective, that force one to do this. More than one device has been created that allows you to solve the problem, and you can choose a device that takes into account the production date of a particular car and allows you to carry out this procedure without consequences.

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Advantages of purchasing on spidometrus.ru

• Factory production. The spinners are ordered in large quantities from China. The human factor is excluded. In 8 years of working with CAN winders, there were only two replacements due to breakdown.
• Lowest price on the Russian Internet. Show me where it is cheaper and I will make you a special offer.
• All prices are lower for regular customers. Show it to the boys and let's earn money together!
• Warranty service All winders come with a warranty from 3 months to 3 years (details on the product page). During the warranty period, a free replacement is available to you.
• Easy return. If you didn’t like something about the product, if you changed your mind, if you couldn’t connect or configure it, if you just decided to live by the rules - within 30 days after receiving it, you can return it to the store. Just let me know.
• Official business I work for a white job and pay taxes. If you need purchase documentation and payment to a bank account, we have it all. Possibility to specify any product name you need. (Conditions and prices on request)

Device

The speedometer on KamAZ is a device for measuring the speed of a vehicle. The device connects to a speed sensor and a topographer.

Analog can be:

1. Pointer - speed is shown by moving the arrow across the dial.
2. Tape - the location of the tape on the horizontal scale shows the speed.
3. Drum - the indicator is placed on a drum that rotates in proportion to the change in speed.

A mechanical dial meter is installed on many machines.

Analog meter device:

1. Worm unit, which is installed in the gearbox.
2. A gear that rotates together with the gearbox shaft. This makes it possible to calculate the rotation speed of the drive and wheels.
3. The wire that runs from the worm assembly to the instrument panel.
4. Magnetic element.
5. A metal plate attached to the arrow.
6. Scale.
7. Spring.

An accompanying element of the device is a counter, which determines the length of the path traveled and is connected to the cable via a worm gear.

In the electronic device, there is no mechanical connection between the data on the instrument panel and the transmission output shaft. The device is:

1. Optoelectronic, in which there is a high-speed part with a cable, and the speed data is determined by photointerrupter pulses.
2. Bestrosov, in which a magnet is installed, rotating in place with the gearbox shaft. Changes in the magnetic field are converted into pulses by the bridge circuit.

A popular meter that operates using the Hall effect. Changes in output voltage are proportional to the rotation speed of the disk. The frequency of the voltage pulses allows you to determine the speed of the machine.

Design and principle of operation

The design of this mechanism includes such parts as:

• unloading piston and valve;
• air flow sampling plug;
• release type valve;
• spring mechanism;
• balancing device;
• adjusting screw;
• case;
• follower type piston;
• check valve;
• unloading mechanism saddle;
• cap;
• atmospheric findings;
• filter and pusher.

The flow of compressed air from the compressor system through the output of the control mechanism, filter elements and valves enters the receivers of the vehicle's pneumatic system.

The air passes through the channels under the piston part of the power unit, which is loaded by a spring balancing mechanism. At this time, the exhaust type valve connects the plane above the piston part.

Important Design and operation of the MAZ cab

Under the action of a spring mechanism, the inlet and discharge valves are closed, which allows the device that regulates the pressure level in the KamAZ system to be filled with air from the compressor.

Under the pressure of the air flow, the piston device overcomes the action of the spring and moves to the upper part of the system, the valve slams shut.

The compressed air lowers the piston mechanism back, and the valve opens again, and the compressed air flow passes through the terminals and penetrates into the environment along with the condensate accumulated in the working plane.

The unloading valve protects the mechanisms in the event of a failure of the safety device.

The compressor pressure level regulator operates unloaded, without backpressure.

Why does not it work

If the speedometer fails or does not work, the reasons may be as follows:

1. The gears of the worm gear of the device are made of plastic. Since the material is fragile, this can cause the gears to break.
2. The cable broke off where it connects to the speed system, which is screwed into the gearbox.
3. The sensor contacts have oxidized or the power supply wire has broken. At the same time, the power is checked using a multimeter.
4. There was a breakdown of the electronic part of the device located in the panel.
5. There were distortions in the device readings. Most often this is due to instrument calibration, which is difficult to perform.

Speed ​​is measured by the rotation of one axle of the final drive, and when turning, the wheel located on the inner radius travels a shorter distance than the outer one.

But the main reason for the inaccuracy of the data is the size of the wheels. The larger the wheel, the greater the distance the machine will travel in 1 revolution of the shaft.

The meters are mistaken by 5-10 km/h. Sometimes inaccurate data causes accidents. Therefore, car manufacturers, when calibrating electronic devices, make sure that the device on a new car does not show an underestimated speed.

How to connect

The speedometer connection diagram, calibration and pinout instructions are available in the operating instructions for the device. At KamAZ, during manufacturing, the device is configured and a seal is installed on it. The need for adjustment arises when replacing a sensor, dump semi-trailer, wheels, axles.

The speedometer setting is as follows:

• KPPS is determined (coefficient of the speedometer indicating device);
• the value of the maximum speed is adjusted;
• the current time is adjusted.

KamAZ speedometers cannot be repaired. Their disassembly leads to malfunction. The meter is replaced by specialists.

Possible malfunctions of the speed sensor

KamAZ 55102, 65115 often have device malfunctions, because such models have been produced for a long time and there are numerous used models on the domestic market.
Malfunctions are manifested by problems with idle speed (the car may stall), corrosive changes in contacts. The KamAZ gearbox and speed sensor must be replaced, otherwise the following problems may appear:

• lack of information about mileage and speed due to inoperative devices;
• malfunction of the engine (impaired idling speed, excessive fuel consumption, loss of power);
• serious problems with security systems.

How to wind the speedometer on a KamAZ

The KamAZ-6520 or KamAZ Euro speedometer is adjusted using special devices that allow you to adjust the device’s performance. If you need to rewind the device or change the device data, you can contact specialists. But there is a way to do it yourself.

KamAZ is equipped with a speedometer and odometer, showing the mileage of the vehicle, and has a generator and engine system. The generator is the sensor, the engine is the receiver. The speedometer receives a three-phase signal from the generator.

The winding circuit of the device should create a similar three-phase signal with a 120° shift between phases. To change the data on the number of kilometers, you need to change the numbers not only on the speedometer, but also on the odometer. A device for winding measuring devices (twist, winder or winder) carries out such actions automatically. When twisting, the changed data of the electronic speedometer and all other electronic units are saved.

How to wind up the speedometer

GAZelle cars were equipped with speedometers of several designs:

• with mechanical drive of all elements;
• with electronic drive speed indicator and mechanical odometer;
• electronic version with LCD screen.

On early GAZelle cars equipped with a mechanical speed meter, adjustment is carried out by rotating the cable from the electric motor. You can wind up a GAZelle Business with early versions of electromechanical meters using a motor from a computer fan. Power is supplied from the cigarette lighter socket, a free wire with green or yellow insulation is connected to the block (to the green conductor) located above the brake pedal. After turning on the ignition, winding begins.

Winding up mileage readings in 3-phase speedometers

Correction of mileage readings on KAMAZ vehicles and other models with a three-phase, 24-volt, electromechanical speedometer can be done using the proposed device. This is a simple circuit, assembled on a cheap element base, but does a decent job of winding readings in one direction or another. There is no need to break the integrity of the seals in the dashboard; you just need to connect to the wires coming from the speedometer.

A rectangular pulse generator is assembled using elements DD1.1-DD1.3 according to the classical scheme. Next, these pulses are sent to a decimal counter-divider assembled on the DD2 K561IE8 microcircuit, operating with a shortened cycle (counting to 6). Diodes D1-9 form from six outputs DD2 (Q0-Q5) 3-phase pulses, shifted along each phase, which are supplied to output elements DD1.4-DD1.6. After this, the signal is connected to the phase wires of the speedometer and, depending on the phasing, you can change the mileage readings up or down.

The graph shows the theoretical shape of the signal at the inputs of elements DD1.4-DD1.6 (without RC chains). The circuit is powered from the vehicle’s 24V on-board network, but a twelve-volt battery is sufficient to operate the speedometer and device. The circuit contains a voltage stabilizer 7812 to power the circuit elements, at the input of which a protective diode against polarity reversal is installed. Capacitor C2 is a filter that must be installed. Chains R3-5 C3-5 smooth out the rectangular front of the pulses. From practice, without the use of these capacitors, the speedometer needle dropped to zero when the frequency increased intensively. Variable resistor R2 is convenient to use with a built-in switch, because There will be no need to use an additional power switch.

Setting up the device comes down to selecting the values ​​of C1 and R1 in order to “set” the speedometer needle. During startup, the slider of resistor R2 should be in the extreme right position according to the diagram, and then the frequency of the generator gradually rises by decreasing its resistance.

You can download the printed circuit board in Sprint-Layout format below

How to change the odometer, speedometer, diagram.

Direct fuel injection systems on domestic cars have made it possible to use fuel efficiently, while increasing engine power. Recently, there has been a great demand in the automotive market for devices that generate electronic odometers . Who benefits from increasing the mileage in their car?

The answer to this question is obvious. Drivers of government and official (corporate) cars thus have the opportunity to write off gasoline. And today he is worth his weight in gold.

Previously, mechanical odometers were installed on older car models, and kilometers could only be added mechanically. Over time, an electronic odometer was invented, and skilled radio electronics specialists from various car depots came up with a simple and effective way to wind up the odometer. For this process, you need to connect a wire from the additional terminal of the generator to the dashboard, where the odometer itself is located.

But electronics engineers have developed new odometers that are very difficult to hack. And when one day in the garage they connected the odometer in the manner described above, the radio technician discovered that the car would not start. The suffering driver, who lost additional income, was sent to look for other ways to resolve this issue.

The story began with Gazelles and Sobols with installed 405 engines, which consumed a lot of fuel. It was these engines that began to stall when craftsmen tried to increase the odometer. The method for effectively hacking a device is very simple. You need to connect the Combiloader PAK to the ECU (electronic control unit) of the car, from which a special serial engine control program is read.

Then open the CTPro program and in the menu from the listed configuration, uncheck the box next to the speed sensor. According to this algorithm, an already modified engine control program is written to the ECU with minor changes.

After these steps, you can call a good friend of an auto electrician, who will connect the wire from the generator to the instrument panel odometer, and the process will go faster, you yourself will be able to cover the required number of kilometers. But this method is already a thing of the past. Today the world is saturated with advanced gadgets and all kinds of electronics.

Using the volumetric installation method, a simple generator is made, which consists of three radio elements (see electrical diagram).

Toggle switch S1 is needed to switch the electrical signal going to the instrument panel, either from our generator or from a standard speed sensor. Our generator receives voltage from the “plus” of the ignition switch. This allows you to accumulate mileage without starting the car (you just need to turn on the ignition). You can also put the circuit into operation while the car is moving.

An automotive electrician will definitely recommend that you solder another resistor into the circuit in series with the trimmer. This is necessary so that when the control is directed to the extreme left position of its slider, the process of generation failure does not occur.

Also, the circuit must contain a protective diode to protect the electrical circuit from polarity reversal. The values ​​of the resistor and capacitor indicated in the diagram are quite suitable for generating rectangular pulses with an amplitude of 12V, in the range of low and high frequencies (from 180 Hz to 1.5 kHz). These characteristics more than cover the needs of this device on different cars.

To quickly change the frequency range, the capacitor must be replaced. As the capacitor capacity decreases, the frequency increases and vice versa.

The following circuit, with the same principle of operation of the generator, is built on a 555 chip (1006VI1).

It should be remembered that all variants of the circuits given in this article were developed for a 24V voltage in a KAMAZ truck.

The figure shows a generator circuit for 176(561)LA7 or HEF4011.

The table describes cars with modified odometers.

Before you begin making some changes to your car's electronics, you need to complete all of the following points. Our task is to detect the necessary wiring through which the instrument panel odometer receives digital information about the car's mileage. The following describes the procedure step by step:

1) ——- Inspect the gearbox, rear axle, front-wheel drive (if the car is front-wheel drive) in order to detect the speed sensor.

2)——– If you find something similar on the speed sensor, but are not sure that this is it, then you need to carry out tests. To do this, you need to remove the connector from it and drive several kilometers. You should notice that the speedometer or odometer stops working. If this does not happen, then it means that you did not turn off the vehicle speed sensor, but something else.

3) ——— In this case, if you find a three-wire speed sensor, then you must measure the voltage at its connector to determine the signal wire. Next, this signal wire needs to be called on the dashboard. A winder will need to be connected to the end of this wire. To do this, you need to hang up the drive wheels of the car and make them spin, at the same time monitoring the signals passing to the dashboard using an oscilloscope.

4) ——— If in the first point the speed sensor could not be detected, then the odometer probably receives a speed signal from the ABS. In this case, the only option is to search for the signal output on the instrument panel using an oscilloscope.

If you have detailed information materials and electrical diagrams on hand for the car model that you are going to do “chip tuning”, then the task becomes quite simplified. It must be remembered that each car from different manufacturers is individual. You are completely personally responsible for your actions. Therefore, before you start connecting the selected wires, you need to double-check everything several times.

This brief review of odometer winding highlights the general principles for solving the task assigned to us. The specific implementation, on a specific car of a particular model, may differ greatly in favor of complication. If you have already had experience with another type of car that is not yet on our list, send information to us and we will be happy to add to our table.

Some subtleties on creating an odometer winder on Ford Mondeo and Ford Focus 2006 cars, as well as Toyota Camry.

These car models use signals coming from the ABS as a vehicle speed signal. The type of sensor used on these cars is current, which means a change in current in the circuit when the wheel rotates. Changes occur in the range of 7 – 14 mA. If we connect an oscilloscope in parallel to the sensor, then when the wheel rotates we will get a meander with a swing of approximately 0.5 V, with standard values ​​of 12 V. Below is a diagram that completely simulates the operation of such a sensor.

On Ford Mondeo and Ford Focus models, we can determine the positive wire using a voltage tester by removing the connector and working with the wire with the ignition on. In this example, we used the effect of complete (manual) recommitment. To wind the odometer, you need to open the hood, then remove the plug from the connector, and connect the winder in its place.

We turn on the ignition of the car and carry out the necessary winding. After completing the necessary actions, we connect plugs to the connectors, which restore the factory connection of the ABS control unit with the sensors. All these wires could be connected to a relay, but as a result of our actions a lot of extra wires would appear. When testing and operating our system for winding up the odometer, you should use two driving wheels, because when one wheel is working, the speed indicator will not exceed 30 km per hour.

The TOYOTA CAMRY car model, produced in 2006, has an instrument panel called “optitron” and has neon backlighting. The engine capacity is 3.5 liters, the gearbox is automatic, the speed signal coming to the odometer is taken from the ABS and has the form of a sinusoid with an amplitude of 1V, with a frequency directly proportional to the rotation speed. This car uses an inductive type of ABS system sensor.

The electrical circuit that we need to change the odometer must be built using the KT3102 transistor. A resistive divider operates on the amplitude of the output signal, thereby reducing it. A capacitor with a capacity of 0.1 µF to 0.47 µF removes the DC component of the signal.

Let us remind you that it is not recommended to interfere with the operation of the ABS system, but if you do make decisions, then you must fully understand the consequences and, in accordance with this, carry out the work at the proper quality level.