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Engine Wiring Harness (ST185 - MR2 Turbo)

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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?


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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.


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