A speedometer, in particular an electronic one, is a rather important element in any car. In accordance with the parameters of this device, the driver will always be able to know when to carry out maintenance on the machine. In this article, we will talk about home reeling.
What is the working principle?
At the moment, all vehicles without exception are equipped with speedometers, with the help of which the car owner can always know at what speed his "iron horse" is moving. The machines are equipped with three types of devices - mechanical, electromechanical and electronic. What is the principle of this node?
The electronic type of devices is mounted on any modern car, mechanical and electromechanical devices are typical for cars of older years of production. The mileage is electronically measured according to the wheel revolutions. The on-board computer, receiving information about the size of the wheel circumference, translates the number of revolutions into the distance traveled. All the necessary information is shown on the display on the control panel.
Why change the mileage?
We have described how the node works. But how to roll up the mileage on your car and how to roll off a digital speedometer with your own hands? As you know, car owners periodically have to resort to this action. Moreover, the driver can both twist and reel this indicator. With the twisting of the indicators, everything is clear.
As a rule, this task is performed before the sale of the "iron horse" so that the car owner can get more money for his car. As for the twist, here is a slightly different principle.
Do-it-yourself reeling of an electronic speedometer is necessary:
- If you need to change the power unit or control panel. Changing these elements in his car, the owner will need to bring all the necessary parameters, relying on the characteristics of the new engine and take into account the features of the installed tidy.
- When the machine is used commercially, winding up the readings can be helpful in increasing the financial cost of fuel. After all, the increased mileage allows many drivers to write off more fuel for their car. Twisted mileage makes it possible not only to carry out fraud with documentation. When the car itself is very old, it will consume more fuel anyway. So the driver sometimes simply has to cheat in order not to pay for extra fuels and lubricants on his own.
- The machine is equipped with wheels that differ in diameter from those prescribed by the car manufacturer. The size of the disks can be either smaller or larger. When operating such disks, the on-board computer will incorrectly read the distance traveled. In this case, it is useful to know not only how to increase the mileage, but also how to reduce it.
Rewinder Guide
If you do not know how to wind up an electronic speedometer, then this is, in general, a very feasible procedure. Fraud with a speedometer drive can be carried out using a variety of devices. Do-it-yourself winding of the electronic speedometer is carried out in accordance with the operating instructions for the specific device that will be used. There may be differences in the process depending on the instrument itself that is used. Below we will consider several main types of electrical gadgets with which you can connect and rewind mileage readings (video by Evgeny Ushakov).
Devices for reeling
- CAN device. Such a device is designed specifically for use on modern vehicles. In this case, CAN is a special bus through which information is exchanged between various electronic components of a car. Before winding or unwinding the mileage, it is necessary to connect the device to a special diagnostic connector. Already through this output, using the data exchange protocol, the gadget will be able to synchronize with certain nodes. CAN-spinners allow you to adjust the content of certain cells in the memory, making the necessary actions in order to get a specific result. Even if the car buyer tries to find out with the help of diagnostic equipment what actions were carried out with the mileage, he will not be able to do this.
- Pulse device for connection to OBD-2. Devices of this type are designed specifically for use in foreign-made machines that do not have a CAN bus. The pulse device is connected to the vehicle control unit via the corresponding OBD-2 connector. Typically, this connector is located either behind the glove compartment, or on the center console on the driver's side - under or around the steering wheel. When a pulse gadget is connected, a certain sequence of signals will be sent to the speedometer, simulating pulses from a speed sensor. Accordingly, this will lead to a change in mileage.
- Speed generator. A device such as a speed generator simulates the operation of the corresponding sensor. Only instead of the sensor, a generator is activated, which gives out a certain sequence of signals, which subsequently go to the speedometer and change the vehicle's mileage.
- Spinner for cars with ABS- another type of device. The operation of such a device is based on monitoring the speed of movement and rotation of the car wheel itself. When the device is connected to the control unit, the device begins to simulate the work of the wheels. In accordance with the received data, the controller performs winding or unwinding of the readings.
Video "Instructions for winding the electronic speedometer"
How to rewind mileage readings on an electronic speedometer on your own - see the video below (the author of the video is Nikita Kislyakov).
