Hi guys , i have a subaru GC8 97 lhd and i buy a link g4+ plug'in v3-v4. but in first when i connect my link ecu , its was not feeding . i find the problem thanks manuel . i had positive current on ground ecu . The ecu start and i'm comming to connect my pc to the link . But i have 4 fault code and no TP value and the rest i do not know . -ecu fault code 17 : an volt 3 below error low value . -ecu fault code 20 ;an volt 4 below error low value . -ecu fault code 43 : an temp 1 above error high value . -ecu fault code 46 ; an temp 2 above error high value . i thinks it's very strange . if anyone could help me .