Grant Baker Posted January 24, 2017 Report Share Posted January 24, 2017 HiWe have an Xtreme wire in running a fairly normal 4cyl engine. All fine - runs well and everything works as it should... until we turn off the ignition switch.At this point the main relay and fan relays start pulsing away like mad. Off-On-Off-On etc.If we disconnect the battery and reconnect they have stopped, until we turn off the engine next time, at which point it happens again.It seems to be related to the ECU install as it didn't happen before on stock ECU, but can't see what is up.An pointers? Quote Link to comment Share on other sites More sharing options...
Ducie54 Posted January 24, 2017 Report Share Posted January 24, 2017 Are you using resistor or diode relays, between pins 85-86? Quote Link to comment Share on other sites More sharing options...
Grant Baker Posted January 25, 2017 Author Report Share Posted January 25, 2017 Stock normal 4 pin relays Quote Link to comment Share on other sites More sharing options...
Scott Posted January 25, 2017 Report Share Posted January 25, 2017 (edited) It sounds like an ECU back feeding problem. This occurs when one of the outputs that the ECU controls is powered by a battery +12V instead of an ignition switched +12V. Are all outputs powered from an ignition switched +12V supply?Scott Edited January 25, 2017 by Scott Quote Link to comment Share on other sites More sharing options...
Grant Baker Posted January 25, 2017 Author Report Share Posted January 25, 2017 I believe so yes - they should all be fed by 12v Ign rather than battery. The Fan Relay has perm 12v on pin 30 IIRC.Will check tomorrow. Would a different type of relay help? Quote Link to comment Share on other sites More sharing options...
Scott Posted January 25, 2017 Report Share Posted January 25, 2017 Not with a backfeeding problem, as the backfeed is through the activation coil of the relay.Scott Quote Link to comment Share on other sites More sharing options...
Ducie54 Posted January 25, 2017 Report Share Posted January 25, 2017 I had an issue with mine where the ignition switched wire would not drop to 0 would sit at .3vOnly way I worked out it out was by removing fuses, relays and engine plugs one at a time before switching off the ignition. Quote Link to comment Share on other sites More sharing options...
Sparkystav Posted April 2, 2017 Report Share Posted April 2, 2017 I've got the same problem with my Link G4+ Fury. Ive got Dbw throttle so wired the ignition switch and used ecu hold. I'm using injector 8 for the ecu hold so used wiring method two as per the manual. Ive fitted the correct diode and double checked it's the right way round between the ignition switch and ecu power. But when I turn the car off the main relay starts chattering. I adjusted the stall setting and that makes no difference. The ecu hold setting delays the chattering starting till after the countdown. Can anyone shed any Light! Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 3, 2017 Report Share Posted April 3, 2017 It would most likely be one of the other aux outputs that is back feeding. As a test you should remove the pins/wires out of all other aux outs (leaving only the ecu hold power aux connected), including any ignition or injector outputs that are used as auxiliaries. If relay then behaves as expected you have 12v feeding back through one of those aux's. To learn which one you can reconnect one at a time. Quote Link to comment Share on other sites More sharing options...
Sparkystav Posted April 8, 2017 Report Share Posted April 8, 2017 Thanks I'll double check that then. Quote Link to comment Share on other sites More sharing options...
Jareds Posted April 10, 2017 Report Share Posted April 10, 2017 Thanks I'll double check that then. Maybe i can assist here - ive just been throught this myself.I too used a DBW setup, and the ECU hold functionality. Is your ECU hold output applying the ground for your main relay?I found the only way out of this - after disconnecting EVERY SINGLE IN/OUT to and from the ECU with NO effect - was to disconnect the ecu hold. Long story short - If i applied a ground straight from the body for example to hold the Main relay in - i got no chattering from the relays. I then tried to isolate the ecu hold ground from the main ignition relay ground by switching a GOOD ground through a relay. Been about 1 month now - no issues. Quote Link to comment Share on other sites More sharing options...
Sparkystav Posted April 25, 2017 Report Share Posted April 25, 2017 Ahh nice, so using the Ecu trigger to trigger a relay to trigger the main relay. Makes sense, I will try that. Thanks for the help Quote Link to comment Share on other sites More sharing options...
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