just recently had my car tuned and found out the boost controller option isnt working with the a/c button. when the a/c button is activated the ecu doesnt acknowledge it is turned on. i have a MAC boost solenoid and i have it plugged into A11 port on the wire harness to the ECU. my ecu is a p72 and i have a 95 gsr turbo'd. i have removed the a/c compressor and i have also cut the 4x2 plug on the passenger side that, from what i believe activates the a/c compressor, so i can use the 4x2 plug to wire in my resistor box for a plug and play setup. the a/c light on the dash does come on with the blower motor, but like i said before the ecu doesnt acknowledge it either. im unsure if im suppose to wire something else up to the ecu from to the a/c button or any other button i would like to use to control high and low boost settings. yes, i did get the boost control option with my ecu. i have a synapse engineering wastegate http://synapseengineering.pinnacleca...lver-31-1.html.
for me to use high boost i have to run the boost solenoid hose to very bottom port which can read 13.9+ lbs and if i want to use low boost i would then hook the boost solenoid hose to the second port from the bottom up. my low boost is 10lbs and my high is 15lbs. back to my main question, do i have to wire in an additional wire to activate low and high boost? if so, im thinking about using the cruise control button since i may have to use the blower motor to help cool my motor if need be. thanks

 

the s300 high boost option should be set. see the drop down parameter what it says.

if you are not using the high boost option, then its probably disabled.
so the boost per gear (low/default) is active.

if you used the B5 switch (a/c) then that should be set in s300.

not necessarily high boost BTW. boost 1/boost2 if you really look into it.

 

Yeah my tuner and I were testing it out and we didnt get anything out of it. In the sensors tab there is a call out for a/c and we were pressing the button to see if the ecu would show it being toggled on/off. The ecu didnt recognize it all is what I'm saying. We set the boost control options correctly and had the a/c button active in the drop down menu as well, but it wasn't doing what it's suppose to do. Let's say I wanted to use a toggle switch how would I go about wiring it in?

 

you have to modify the stock a/c switch wiring. just because you removed the A/C doesn't mean the switch will automatically work for hondata boost control.

best bet is to pull out the a/c switch and see what color wires you have. compare with the wiring diagram and decide what needs to be changed. you should just need to ground the one side. which i believe is normally provided through the blower motor circuit

 

you have to jump the a/c pressure switch in the engine bay for that to work.

 

Can I just run a wire to B5 and a then 12v power source and have it work that way?
If so then I think I might use the cruise control button because it's closer to the steering wheel.

I'm beginning to like this site more and more everyday, I get difficult questions answered quicker here than other sites I'm on

 

Toggle switch. One wire to selected input at ecu, and one wire to ground. Done!

 

why not hook up boost by gear and eliminate using a button at all?

 

He wants a high/low map I believe. High and low boost map is only bbg and doesn't give you any other option if I remember right.

 

You can have BBG for high and low settings
I havent fooled around with the BBG settings I just got my car tuned this past Saturday, so I need to research so more on it.