I think this will help, it is in IH8MUD.com and it was an answer from the boss of Adonis, Mr. Emmanuel Baltes to Mr."OursSauvage"
"Hello
there are 3 different kits for HDJ100 and in each kit has 2 versions:
HDJ100 98-2001 : HDJ100
2 modules - one, electronic, for the injection pump management...