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[99gsrturbo]

So i was trying to run my meth kit with my tuning software and was going to use the b5 (AC Switch) on the ecu and my multimeter went bad. Does anyone know what the input voltage for the AC switch is? I have a 1999 Acura Integra GSR, cause i know some of you will ask what car its on.

[Joseph Davis]

It's an opamp circuit with a pull up used as an on/off input to the micro - it looks for a ground to activate it, will float high and register as off with nothing connected to it.

[99gsrturbo]

so it's a ground input? So I just wire up the switch with a ground relay and in theory it should active the map and as long as its before the meth kit boost switch it will active it as well,

[HiProfile]

I have a 1999 Acura Integra GSR

lemme guess Mr 99gsrturbo, is it also turbocharged? lol


I think you summed up what JD said. Use the AC switch to feed a relay ground, which then sends voltage to the +12v input you're using.

[99gsrturbo]

I was not sure if the input was 12v or 5v or a ground. I found a multimeter and will see what it is tomorrow. But either way I was goin g to set it up so I could either run the meth or not. Due to me going to run e85 I don't see much gain for running meth