wordword Posted May 3, 2023 Report Share Posted May 3, 2023 I came across a good deal on a Xtreme ECU, for use in an Evo 4, 4g63t engine. I want to take my time and build a new harness as this would be my first time building a harness. So untill then I'm trying to use a breakout board to wire the ECU into my existing harness. I have a few questions about this, each link ECU connector has 4 grounds but the Evo harness has 2, can I split this? Each link ECU connector has 2 sensor grounds but the Evo harness has 1, can I split? The 14 volt on connector B, do I still wire this if I'm not using E-throttle? Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 3, 2023 Report Share Posted May 3, 2023 Probably just 2 power grounds will be ok provided the wires are decent size. You would likely only be putting 6-10A to ground with everything maxed out. You dont need both sensor ground pins connected. B5 will need to be powered. Note you are going to need to add a bit of extra stuff to control the main relay for ECU hold power. Something like below should work I think. Mitsi pin numbers on the left, Link ecu on the right: wordword 1 Quote Link to comment Share on other sites More sharing options...
wordword Posted May 3, 2023 Author Report Share Posted May 3, 2023 37 minutes ago, Adamw said: Probably just 2 power grounds will be ok provided the wires are decent size. You would likely only be putting 6-10A to ground with everything maxed out. You dont need both sensor ground pins connected. B5 will need to be powered. Note you are going to need to add a bit of extra stuff to control the main relay for ECU hold power. Something like below should work I think. Mitsi pin numbers on the left, Link ecu on the right: So for the grounds I can do the following? Pin 13 --> pin A25 Pin 26 --> pin B25 Pin 92 --> pin A24 Also, I'm not seeing info on Evo shielded wires and how it's handed in the harness, so what should I do with pin A7 and B17? Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 3, 2023 Report Share Posted May 3, 2023 12 hours ago, wordword said: So for the grounds I can do the following? Pin 13 --> pin A25 Pin 26 --> pin B25 Pin 92 --> pin A24 Yes. 12 hours ago, wordword said: Also, I'm not seeing info on Evo shielded wires and how it's handed in the harness, so what should I do with pin A7 and B17? The trigger wires arent shielded in the evo factory loom. wordword 1 Quote Link to comment Share on other sites More sharing options...
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