In 50% of SAWDOC immobilisers MCU PIC18F252 is locked against reading.
Because of this software module 174 cannot read data for to make key.
Software 180 can unlock PIC18F252 used in immobiliser box SAWDOC in Land Rover.
You can unlock PIC18F252 with TMPro, download connection diagram
To unlock PIC:select manually software 180. Press Select and write memory devicebutton.Unlocking procedure will begin. At end of procedure MCU is unlocked.