Problem: Xhorse VVDI2 Volvo V70 1998- with 93С66 and pcf7935. When loading eeprom data, free positions 4, 5 and 6 are not available for writing. How to solve this issue?

Xhorse senior engineer replied:
Just generate key from 1,2,or 3 position. No need write back data to immobox if using together with Super Chip XT27A01 XT27A66 Transponder; if using together with the original key, need to write back data to immobox.
http://blog.xhorse.co.uk/how-to-fix-vvdi2-93%d1%8166-pcf7935-key-4-5-6-not-available/