How to read and write ChangAn MT22.1 ECU with Xhorse VVDI Prog programmer?
1. Cut the engine computer board, find the wiring diagram, and then use a multimeter to point out the pins to facilitate soldering.
2. After soldering the wires, open the VVDIProg software.
Select 2 Microcontroller- Motorola MC9S12 series- MC9S12XET256 encrypted.
3. Hit Read Chip ID and identify ID first.
4. Click on Unlock if the chip has a password.
5. Then click on Read data and read the D-FLASH and PLASHF data.
6. Write modified data to the ECU.
Images attached:
