fiestacosworth Posted November 18, 2017 Report Share Posted November 18, 2017 can somebody help please! sierra cosworth 2 pin idle control solenoid live one side connected to +12v and the other side connected to ecu Aux 3 output. idle control turned on! when I turn the ignition off the valve is back feeding 12v turning the ecu back on. I have read about flywheeling diode etc. however just to confirm. am I using the correct aux output ? or should I be using a specific one ? if so can I just run the icv directly to a separate relay with a flywheeling diode built in ? help please! Quote Link to comment Share on other sites More sharing options...
Grant Baker Posted November 18, 2017 Report Share Posted November 18, 2017 Recently used this exact valve on a Monsoon. Personally I used Aux 5, but only because it was available. Ign 12v+ on one side and Aux 5 on the other. No issues at all with ECU staying live. Quote Link to comment Share on other sites More sharing options...
Ducie54 Posted November 18, 2017 Report Share Posted November 18, 2017 1 hour ago, fiestacosworth said: can somebody help please! sierra cosworth 2 pin idle control solenoid live one side connected to +12v and the other side connected to ecu Aux 3 output. idle control turned on! when I turn the ignition off the valve is back feeding 12v turning the ecu back on. I have read about flywheeling diode etc. however just to confirm. am I using the correct aux output ? or should I be using a specific one ? if so can I just run the icv directly to a separate relay with a flywheeling diode built in ? help please! Make sure your using 12v from an ignition source and not constant battery 12v Grant Baker 1 Quote Link to comment Share on other sites More sharing options...
fiestacosworth Posted November 18, 2017 Author Report Share Posted November 18, 2017 hmm this is really strange then. i have one side connected to aux 3. the other connected to switched live. with ignition on ecu is giving idle valve 12v the other side is also 12v as ignition is on. i switch the ignition off and the valve is back feeding 12v back to switch live wire and in turn powering up the ecu... i have removed the valved and tested it and with a switched earth the valve is working. Quote Link to comment Share on other sites More sharing options...
Grant Baker Posted November 18, 2017 Report Share Posted November 18, 2017 Can you screenshot your AUX 3 settings? Quote Link to comment Share on other sites More sharing options...
Adamw Posted November 19, 2017 Report Share Posted November 19, 2017 Is your wiring like this?: If it were more like this then that may cause what you are seeing: Quote Link to comment Share on other sites More sharing options...
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