This allows you to skip the two functions related to the BD-Drive.
We avoid the error and let the system continue updating.
Enable Service Mode.
Copy the Lv2Diag.self to root of the USB.
Copy the PS3UPDAT.PUP file to root of the USB.
Turn on the PS3 with the USB inserted into the port 000 (the closest to the reader).
Wait until it turns off.
Copy the Lv2Diag.self the STEP2 (not provided for me) (MD5: 7A20BFDAE65EEFB47A4425DB1B52DCDE) to get out of FSM.
Insert the USB into the port 0.
On and after a few seconds turns off.
Needless to say, but just in case.
It is your responsibility. Compatibility is the same as the original Lv2Diag.self.
Lv2diag is a dangerous tool, inform you of this.
Thanks for testing it psmaniaco!
Luck!