How to Solve Multi-Prog MQB49 5C 5D Chip Connection Failed Problem?

Customer Feedback:

The Xhorse Multi-Prog failed to read immobiliser data from a 2022 Škoda Kodiaq MQB49 5C smart key, showing a “chip connection failed” error. The device could not establish stable communication with the key chip, making the operation unsuccessful in this case.

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XhorseVVDI.com‘s Engineer Answer:

You did not modify the MCU cable as shown in the diagram.
To read MQB49 5C/5D original key data with multi-prog, need to modify mcu cable first.
Fix the ground cable at plug.

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