Philip Griffiths Posted September 30, 2015 Report Share Posted September 30, 2015 Hi, might be a bit of a dumb question... my current IAC valve is causing numerous issues (sticking - are know to fail) and I have a bosch (0280140551/AC309) to install instead. This is a 2 Terminal version. Appears these are a rotary valve type that utilises set voltages through an armature for % opening, and must have a spring return (more info here: http://mbworld.org/forums/e-class-w124/503103-idle-air-control-valve-airflow-versus-control-voltage.html). Would wiring be the same as if this were a two terminal solenoid valve/a four terminal ISC stepper motor and only use two aux's?Thanks,Philip Quote Link to comment Share on other sites More sharing options...
Simon Posted October 1, 2015 Report Share Posted October 1, 2015 Looking at the image that looks very much like a conventional bosch 2 wire solenoid.The unique bit of this solenoid is that at 30% duty cycle the solenoid will be closed and will open at figures above and below this.If you run a ISC minimum clamp at 30% it will be fine to use.I would wire as per a standard 2 wire solenoid. 12V to one pin and the other back to Aux 1 or 2 on the ECU. Quote Link to comment Share on other sites More sharing options...
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