VVDI Prog Land rover RFA XEQ384 Cannot Crack Chip?

 Problem:

Landrover RFA secured XEQ384 adapter not working.
Can’t crack chip, also the same when using xhorse mini prog.
Not using a power supply.
I’ve done plenty of RFA-SECURED (XET256) with no solder adapter using mini prog and vvdi prog without power supply.

It’s the RFA-SECURED (XEQ384) adapter option that has the issue.

 

 

Solution:

Got this working with help from xhorse support, had to reduce VPP to 3.3V, no power supply needed for vvdi prog.