Tacho Pro 2008 July PLUS Universal is one French favorite device to do mileage correction. It can do multi-brand cars than the other tool. See the procedure to do on Ford Focus bellow:
Use the Scorpio plug:
1.Pin 2 GND(-) black
2.Pin 9 RX (Data) blue
3.Pin 11 TX (Data) yellow
4.Pin 14 12V (+) red
5.Pin 16 12V (+) red
Processor version 1:
• Connect Pin 1 ( left side down) and pin 2 (right from pin 1), or connect black to test point 3 (TP3).
• Connect pin 1 (middle upside) and pin 2 (left beside pin 1), or connect black to testpoint 46 (TP46).
• Remove the cluster and open it.
• Connect the cables as shown in the picture.
• Select the menu Ford-Focus
• The Tacho Pro 2008 July PLUS Universal shows you the old value.
• Enter the new value.
• Verify the new value with OK.