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I think I've found out the problem. Not sure. Anyhow, after testing these pins, I tested the Blue & Red wire which contains the 5V from the ECU again and found out that when I test the continuity of that wire, it had a LONG beeped all the way to the ECU. When I test the continuity with the other...

VTA1 @ 1.74v (Black probe on - on battery and red probe in plug VTA1 ( pin 3 / yellow wire on main TPS ) IDL1 @ 0 ( no ground ) red probe on + on battery & black probe in plug of IDL1 ( pin 2 / red wire on main TPS ) Recheck the 5v and it is present on all 3 plugs.

where can i check for the 5v rail?

5 volts rail? Im sorry, I'm confuse! i assume 5 volts from the plugs.

Some additional info if it may help: I’ve looked at some of the wiring diagrams for these sensors and found 3 different diagrams. All look similar. I’ve wired my system matching all 3 and still same DTC. Im not sure as to how fast the ECU finds a DTC. But after resetting the ECU and restarting...

5volts are found on all three plugs , sub tps, main tps and afm. tested the ground too, on all the plugs too and everything good.

No i have not check voltage at the ECU for TPS. I have 4 O2 sensor and are connected. however i am recieving a DTC for the right sub O2. I didnt think that may be an issue related to AFM or TPS. i was planning to get that resolve last. But enable for you to help i could get that fix!

Okay, check the IAC and yes it is connected correctly. I unplug the main hose that goes to the intake arm and I can hear and feel it sucking air. when I plug it up with my thumb it shuts off engine. So I know its working.

The only diagnostic port install is located inside the engine bay! I do have grouds bolte up on the passenger wall. IAC, havent check that yet! but that would have gotten a DTC rite?

Been searching multiple websites including this one and no luck with my issue. 92 Lexus SC400 1UZ to a 86 Toyota 4Runner Almost finish this swap and now having some issues. Motor starts up and revs good. It’s getting everything it needs but it has 5 DTC. 7: TPS 29: Right 02 sensor...