If you decide to install a new speedometer on a used car, then you need to correlate its readings with the readings of the old device. Failure to do so can lead to confusion.
Instructions
Step 1
To solve this problem, you must use a special device. Drivers call it differently: speedometer winding, mileage winding, speedometer winder. According to the passport, this device is called a generator for winding speedometer readings. It will generate pulses from the speed sensor. When the speedometer readings change, the total mileage will also change.
Step 2
Such a generator can wind up kilometers even while the car is stationary. In two hours without any problems, you can increase the car's mileage by 400-500 km.
Step 3
The purchase of this device must be treated responsibly. There are quite a few fakes on the market these days, which are of low cost and quality. Pay attention to the certificate, which must be attached to the generator passport. If it is absent, then the product is fake. Such a generator can break down the first time it is connected to the system.
Step 4
The generator for winding the speedometer readings must be installed correctly. To connect the speedometer winding generator, output the high speed motor data bus to the diagnostic connector. You can also bring it to a separate connector. It is located in the harness that goes to the central electronic module. You can find it under the panel on the right side.
Step 5
Remove the bottom cover to access the module. It is fastened with 2 bolts. The central electronic module is not difficult to find; a large wiring harness fits to it. It is attached to the body with a metal latch. Unfold it and pull out the module. It should hang from the wire harness.
Step 6
Find four twisted pairs in the bundle. They have green and green-white insulation. To wind the speedometer, you need a third pair. Cut off the found diagnostic high-speed bus in the bundle. The ends of the wires that come from the diagnostic connector must be color-coded with one of the twisted pairs. Insulate the wires well.
Step 7
After that, connect the speedometer winding device to the diagnostic socket of the machine. After the indicator goes out, you must turn on the ignition. If you have correctly identified the tire, then the indicator on the device will be on constantly. The mileage counter will increase.
