jetskibruce

Hello, I've installed my MS3PNP Pro and started the car (1999 NB) - hurray! Two questions currently, first the AC , I can run the output which activates the compressor and the fan, but I am not seeing the AC signal which I believe comes in on digital in 3, I'll attach the doc where it is labeled AC switch IN but but it is not labeled that way in tuner studio so I've been trying digital in 3. I am learning MS TunerStudio, is there a screen where I can see the ports change when I activate the switch? I am looking for the AC on in the view and I did setup digital in 3 in the AC idle up settings but I don't see it activate. I do need to go see if I have pressure in the AC ( it was working factory ecu ) but the light does come on the button when pressed. Any easy way to confirm the input? I've read a lot of posts and seems each set of years is wired to the adapter board differently. The diagram is below:

2. Boost is connected to High Current 2 - which I think supplies the ground - so my question is to wire this correctly I should send fused +12 to the boost solenoid and the ground wire to this Boost connector on the MS3? Any recommended minimum fuse? Would 2.5 amp be enough or just go with 5 amp?

Thanks in advance - so much information already gained from reading and reading historical posts!!! Setup going well, no tune to speak of really yet till these last I/O is sorted.

jetskibruce

Boost is hooked up and activating now in test mode. AC looks like should come in on Digital 3 but the wiring on this car will need to be checked. This car was previously modified, maybe something is loose. I have the diagram for the 99 and I will need to chase down that wire and a few others. The harness has been tapped into multiple times , I'm working around the aftermarket remote/alarm so I think I will start using the label maker I have. New wires to the options port are labeled :-)

jetskibruce

In case it helps anyone, after I tested the AC out and had that correct, I inspected the wiring and visually it seemed ok. The input is set to digital in 3 and that is wired to the MS3 on the ECU base board for the MM9900. The next time I fired the car up the AC is now activating. So I'm not sure how the AC on turns green, maybe the car does need to be running, ( I had tried setting the rpm to 0 when the car was stopped) but I'm am pleased it is ok.

Fused the boost solenoid with 5 that's what I had, I think it should only draw .5 amp or so, anyway I am using test mode to see what range to set the controller to.