JDM vs. USDM ecu (yellow plug)

[supraheelfan]

Yes, there is new wiring all the way to the sensors. When I bought the engine i had to replace one of the knock sensors with a used one I bought from supracarparts.com. I didn't think the knock sensors would be different (jdm knock sensors vs. usdm knock sensors) because i've yet to hear anybody else with this problem.
I have also been told by the shop that I'm using, that they checked the ecu voltage and they say the ecu is not the problem.

[supraheelfan]

The entire wiring of this car has been a nightmare from the very beginning.
So it has new wiring, strong ground, both knock sensors work, the connection to the ecu is very tight and strong. I'm just out of options it seems.

It has jdm engine, usdm wiring and ecu, with one jdm sensor and one usdm sensor (i guess)
ok so you say if engine knock is bad enough it'll set off CEL anyway, do you have any idea of how I could check excessive knock?

[cre]

I shouldn't have mentioned the knock thing... It's supposition. It would have to be a very eccentric knock or noisy signal for that to occur and I think you'd know by then that something was very wrong.

How did you rewire the sensors? Did you follow the SOGI rewire?

You say the sensors are fine and have been replaced yet you say one is USDM and one JDM... But they're both new? I'm a bit confused here. How did you test them?

You could open up the ECU and look for bulging/leaking capacitors. The best bet would be to try to find one you could borrow or rent. Unfortunately, I gave away the box I had of half a dozen of them a year or two ago or I'd just send you one.

[supraheelfan]

I didn't do the rewire myself a shop here locally did it. It's the second time they have done the rewire. Once with the original harness (problem was solved). Then I had this used auto harness swapped on the car and the code 52 came back so I had them do the rewire a second time, as well as check the actual sensors again. the problem is still here the only reason i said the sensors could be jdm and usdm is because one is original to the engine and one is not. For all I know they are the same.

I mostly wanted to see if anybody has had this problem and if a jdm engine needs a jdm ecu?
Also, why am I having such a hard time getting rid of this code 52? All the tsrm procedures have been performed by myself as well as other more qualified mechanics, but to no avail.

[cre]

Three things cause a code 52 (barring the really out there shit): bad sensor(s), bad wires, bad ECU. No the USDM ECU isn't the issue. I suspect the rewire didn't work and needs to be redone. The knock sensors could be shot (even if they were tested) as they're very delicate things and they really aren't all that easy to test (most shops, even Toyota's will tell you to just replace them at this age).

Here's a link to the shielded rewire which solves this problem for most owners: http://oldschool.supracentral.com/htm/knock.htm