I know this isn't the tuning section, but this is related to the Y30DT so I think I'll get a better answer here.
I bought the above tuning box from ebay £90, I know it's a cheapie but it is a cheaper digital box. If I liked it I was going to upgrade later to a DTUK box or similar.
Anyway, it comes with a lead which as well as the 15 Pin D into the tuning box, has a male/female 3 pin for patching into the harness.
The diagram looks near identical, however the cable that runs between cylinder 1&2 (as you look at them I don't know which actual number they are), which is exactly as the diagram, terminates at a red block on the rocker cover between the first two injectors. Yet this block has four pins (but only 3 are actually wired, the 4th is blanked on both parts).
Have I been sent the wrong cable or am I looking in the wrong place OR is it just a piece of tut that I should send back and save up for the DTUK box?