Synoko Posted March 15, 2019 Report Share Posted March 15, 2019 Hey guys, looking to purchase a link ECU for my 2nd gen 3SGTE MR2. The only un answered question I have is about the wiring harness. Are the ECUs made to match the USDM only or can I plug in a JDM harness and change the pinouts in the settings or something? Thanks. Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 16, 2019 Report Share Posted March 16, 2019 Most of the USDM cars seem to use the ST205 ecu/pinout. If your harness is from a JDM ST185 then it will work with our ST185 ecu. The easiest way I found to tell them apart is check if the idle valve is connected to pins 5 & 18, if it is the ST185 ecu will work. If the idle valve is on pins 4 & 5 then you need the 205 ecu. Quote Link to comment Share on other sites More sharing options...
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