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i sold a jdm motor to a customer of mines and i send them a usdm harness and a ecu with the numbers 89661-2B28
1750004812 and there saying it doesnt plug in. can anybody help please email me at [email protected] thanks
 

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there are 2 versions of the 2nd gen 3sgte wiring harness/ecu. 91-92 models came with different ecu plugs than the 93-95. A JDM ecu will work on a US spec harness and a US spec ecu will work with a JDM harness. Only problem is USDM ecu --> JDM harness will throw a CEL. JDM ecu to US spec harness will not throw a CEL.
 

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only if it corresponds with in the same year(s)
 

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JdmEngines said:
i sold a jdm motor to a customer of mines and i send them a usdm harness and a ecu with the numbers 89661-2B28
1750004812 and there saying it doesnt plug in. can anybody help please email me at [email protected] thanks
That ECU is from a GT4 Celica (Alltrac) not sure which one, but if the plugs don't fit, then it's from the Gen I ST165, and would not work on a later model engine.
 
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