XTOOL PS2 "failed to download mcu.bin to the vci"?

One of our customers turns to us that his XTOOL PS2 truck tool appeared the error like “failed to download mcu.bin to the vci”. Picture shows a lot:

Here provide a solution by xtooleshop engineer:
you have wired and wireless communication
please turn off wired connection

Please follow the guide on how to connect Xtool PS2 pad.

The obd connector
图2

The GDS VCI reader
图3

Connect the OBD connector to the VCI
图4

fix them firmly
图5

Follow the connection diagram
图6

Plug the obd connector to the car.
图7
图8

The indictor turns red.
图9

Turn on the Xtool PS2 scanner
图10

Both the scanner indicator and VCI indicator turn green, which means they are working normally.
图11 12 13

Finally, the function menu display, you are ready to perform: Diagnose, immobilizer, mileage adjustment, TPS, maintenance reset, electronic park brake and more incl. ansmission, Steering angle, Tire pressure loss alarm (activated) and other common special functions.
图14

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you might be interested:
XTOOL EZ500 Heavy Duty scanner
XTOOL X100 Pro Key Programmer
XTOOL EZ400 PRO

Solution origin from:
http://blog.xtooleshop.com/fixed-xtool-ps2-heavy-duty-trucks-error-failed-to-download-mcu-bin-to-the-vci/