MS2 Programmable Outputs

[alftuning]

Hi everyone!

I'm triying figure my cooling fan in the programmable outputs area but i can't find the correct form to this. I'm using the JS3, IAC2. With this setup my fan turns ON when the car start. I cant find a fan area to work with the ON temp and OFF temp. Thanks for the help!

[jsmcortina]

You have the output set to be on as soon as you power up the Megasquirt and turn off when the temperature is reached.
i.e. you have
"Power On Value" = "On"
"Active Value" = "Off"

I would suggest you want:
"Power On Value" = "Off"
"Active Value" = "On"

This is mentioned in the manual : http://www.msextra.com/doc/pdf/html/Meg ... 3-146.html

James

[alftuning]

If i change values the fan turns ON all the time. The only form to maintain the fan OFF when i open the power switch is with a 20.0 of hysteresis, and "Power On Value" = "On" / "Active Value" = "Off". I dont know what cause this. Thanks!

[jsmcortina]

The on/off thing is because you've wired up the wrong "half" of IAC2. It will work as you have it wired and set though.

James

[alftuning]

Thanks James! Can you help me with the wire up?

[dontz125]

When ProgOut 'IAC2' is ON, pin IAC2A is at +12v while IAC2B is at GND. When IAC2 is OFF, IAC2A is at GND while IAC2B is at +12v. Like James said, you can leave it alone and revise your settings appropriately, OR, you can move your wire to JS2 and have more straightforward settings.