2jzforlife

Hey guys I finally finished installing my mkiv usdm TT ecu on my sc300 with na-t setup with vvti ignition coils and ignitor, TT maf and TT map sensor, New 550cc injectors from driftmotion, Jumped pin 5, 6 and 7 at the ecu as followed in this thread https://www.clublexus.com/forums/sc-...t-ecu-mod.html. Im getting good spark.. Please help someone who knows


I decided to open my ecu cover and see if anything have been modified inside. I found this right here that for sure doesnt look like it came from factory, but looks like someone soldered in a few wires to a small motherboard that they put in the middle of the main ecu boards with 3m double sided tape. Ecu was running good tho on last owners car..
Heres a few pictures of what im talking about

Ali SC3

iTrader: (10)

I haven't seen that before.

red wire is going to A31 (+B)
yellow wire goes to a B2 (a blank pin), probably the new output for whatever this does.
purple wire goes to B5 (G2- is the cam sensor ground #2)
green wire don't really know what this is connected to.

Maybe someone soldered in some kind of 2 step, I am not sure haven't seen it before.
you may want to see if you can get to the module and identify it. Most likely that is your issue, because if the ground for cam sensor 2 was moved/altered, you need to move that pin on your harness, or remove all that stuff.