Paul Moran Posted November 30, 2006 Report Share Posted November 30, 2006 My EJ20TT came with the following idle control: 22650AA131 A33-606R16 Unisia JECS. This unit has: 3 wire connectors 2 screws that can be loosened to allow manual rotation of the entire IAC A hose barb fitting A one way valve on the engine sideThe center connector appeared to be a ground, supplying voltage to one side decreased idle and the otherside increased idle - if I remember correctly - I could have the ground/voltage flipped. Air flow control seems to be done by rotation of a "vane" inside the unit.After hooking the LinkPlus idle control to the high idle side and the center connector to ground,I could not get the LinkPlus to have any control over the idle of the engine.Can the LinkPlus control this type of IAC? Should it be set up as a stepper motor instead of pulse-width-modulation?If the LinkPlus can't control this, I'd like to put a pulse-width-modulation solenoid between the hose barb and the air cleaner, crank up the Unisia IAC to high idle by rotating it and use the secondary solenoid to actually control the idle. Any recommendations on a standard part for this purpose?Thanks, Paul... Quote Link to comment Share on other sites More sharing options...
ashesman Posted November 30, 2006 Report Share Posted November 30, 2006 The valve should be wired as shown in the LinkPlus wiring manual. Place 12V (from an ignition switched source) on the centre terminal and ground the two windings through the ECU.   It should be set up as ISC Solenoid, not t stepper. If using a G2 ECU, then you will need to set up one drive as ISC Solenoid, and one as ISC Slave. There should be no troubles getting this solenoid working with the LinkPlus. All LinkPlus high power drives are ground switching. You may also have to make sure you have ISC Open and ISC closed wired up around the correct way. Sounds like you just about have it sorted. Take the ground off the centre terminal and put +12V (switched) on it and you should be all go. Quote Link to comment Share on other sites More sharing options...
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