ECMTuning - wiki

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<h1>ECMLink's Output Control Wiring (formerly known as "Nitrous" Controls)</h1> <div class="level1"> <p> ECMLink's output controls provide a means of defining parameters that activate any one of a few solenoid outputs on the ECU. </p> <p> These outputs are all switches to ground. That is to say when active, that ECU pin will be connected to ground. When not active, it floats. </p> <p> But that ground connection is *not* sufficient to directly drive a high pressure solenoid. You must use a relay and, preferably, a master arm switch between the ECU and the solenoids being driven if you're using large solenoids. Trying to drive the solenoid(s) directly from the ECU <b>will</b> result in <a href="/wiki/doku.php?id=driver01" class="wikilink1" title="driver01">damage to the drivers</a> inside the ECU. </p> <p> ECMLink's output controls can be used for a variety of things. Our users have been far more clever in how they use this feature than we ever imagined. They have used it to control water injection, methanol, <a href="/wiki/doku.php?id=usenitrouscontrolsfordejontoolbovmod" class="wikilink1" title="usenitrouscontrolsfordejontoolbovmod">blow off valve bypass</a>, and probably a few other things we're not even aware of. </p> <p> So this page is going to describe the general approach to using solenoid outputs of the ECU to drive a larger solenoid through a relay. The rest is going to be up to you and your particular situation. </p> <p> Details on the internal functionality of ECMLink's output controls can be found on the <a href="/wiki/doku.php?id=nitrouscontroldetails" class="wikilink1" title="nitrouscontroldetails">nitrous control details</a> page. </p> </div> <h1>Details</h1> <div class="level1"> <p> First, let's get the ECU pins out of the way. You can get a lot more information on the <a href="/wiki/doku.php?id=ecuwiringinformation" class="wikilink1" title="ecuwiringinformation">ECU wiring information</a> page, including pin location and wire colors as well. You'll want pin 57 on a 1G ECU and pin 3 on a 2G ECU. </p> <p> You'll probably use a standard ISO (Bosch) automotive relay. If so, here's the function diagram for this type of relay. </p> <p> <a href="/wiki/lib/exe/fetch.php?tok=576714&media=http%3A%2F%2Fwww.dsmlink.com%2Fimages%2Fforums%2Fisorelay.gif" class="media" title="http://www.dsmlink.com/images/forums/isorelay.gif"><img src="/wiki/lib/exe/fetch.php?tok=576714&media=http%3A%2F%2Fwww.dsmlink.com%2Fimages%2Fforums%2Fisorelay.gif" class="media" alt="" /></a> </p> <p> The following lists out the basic usage scenario of this relay. </p> <ul> <li class="level1"> Run the ECU output to pin 86 on the relay.</li> <li class="level1"> Run switched power (master switch output) to pin 85 and pin 30 on the relay.</li> <li class="level1"> Run pin 87 to the solenoid and/or secondary relay you want to control</li> </ul> <p> That's about it. Just as an illustration, here's a diagram one of our users put together when he wired up an NX nitrous kit to his 2G. </p> <p> <a href="/wiki/lib/exe/fetch.php?tok=d81224&media=http%3A%2F%2Fwww.dsmlink.com%2Fimages%2Fforums%2FNX%2520Diagram.jpg" class="media" title="http://www.dsmlink.com/images/forums/NX%20Diagram.jpg"><img src="/wiki/lib/exe/fetch.php?tok=d81224&media=http%3A%2F%2Fwww.dsmlink.com%2Fimages%2Fforums%2FNX%2520Diagram.jpg" class="media" title="www.dsmlink.com_images_forums_nx_20diagram.jpg" alt="www.dsmlink.com_images_forums_nx_20diagram.jpg" /></a> </p> </div>