r32skizzzaaa Posted September 28, 2016 Report Share Posted September 28, 2016 Have wired extreme into r32 skyline factory engine loom harness.12v to pin 45Earths to engine block and headI have to manually ground the eccs relay wire to be able to start engine, but ignition stays on when key is off. Is there a way to ground this through the ecu? like a gp input?Also when you turn the key off, the ecu stays powered up and injectors buzz like crazy, so have to disconnect battery to stop this.Is it because I haven't wired up ecu hold power. Does anyone know what wires I need at the factory ecu plug to use this? and is a diode needed? as from factory the ecu stays powered on, so wouldn't there be a diode in the main relay or something?Any help much appreciatedCheers Quote Link to comment Share on other sites More sharing options...
Scott Posted September 29, 2016 Report Share Posted September 29, 2016 Our plug-in ECU has a circuit on it for the control of the ECCS relay. Basically when pin 45 sees ignition switched 12v+ the ECU puts a ground out on pin 16. You could replicate this function using a relay.Scott. Quote Link to comment Share on other sites More sharing options...
r32skizzzaaa Posted September 29, 2016 Author Report Share Posted September 29, 2016 OK that makes sense. But is it not possible to ground the eccs relay through a ecu gp output, like the fuel pump relay? Quote Link to comment Share on other sites More sharing options...
Simon Posted September 29, 2016 Report Share Posted September 29, 2016 You could but you really want the ECU powering up via the ECCS relay to avoid back feed issues. A external relay will work nicely for this. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.