Some interesting comparisons. The 205 A/C system is certainly less complicated than the climate control of the 185. I have only one conclusion. Both ECU's require two inputs and one output from the system. One is the ACT (which is the same on both) on the 205 there is AC1 and ATS, yet on the 185 there is AC (pin 10 on the 22 pin connector, I will call it plug (C)) And the third I am not seeing off the diagrams.
It is pissing me off that the chiltons does not show the tie-in anywhere on the engine control diagrams, yet it shows it coming off the amplifier with power flowing to it via a Black and Yellow wire that goes into the IJ1 connector near the ECU. FML I found it.... it goes to the ACA pin on the 5S-FE!!
The output wire that is supposed to go to the 205 Amplifer (AC1) is the only signal wire from the ECU to the amplifier. you guys were right that the 5S-FE is closer to the 205 than ours, but it still does not have a idle up vsv. You could always throw a ground on there because that's what it is searching for (although I do not see a point because it won't be changing anything) SO.. just leave it not connected?
Next up is the ACT input wire... It stays the same, simple enough...
Last on the list is the input required to idle up, it is the AC1 connector. This one made me think for a while on what the hell it does... It seems to be the signal being sent to the amplifier telling it the clutch relay is active and the A/C is on. Here is where the biggest difference between the systems becomes relevant. The 185 system uses a direct signal branching off from the B-W power wire on the normally non-powered side straight to the 10(C) pin on the ECU, however... The 205 does not seem to use this method, instead it uses a signal from the amplifier to tell the ECU the clutch is in fact engaged (instead of just telling it when the relay is closed it actually reads the lock sensor to see if the clutch is actually engaged or not).
On that theory, here is the plan.... you should have a signal wire from the clutch relay plugged into 10(C) on the 185 ECU plug. If your smart and lazy like me, then you did not move your original (C) connector and just changed some stuff around. If that is the case.. Take out pin 10(C) and plug it into pin 8(C) (ATS) (A/C Transmission Signal?) then, take the L-B pin 10(C) out of the 205 harness plug (C) and plug it into the now empty pin 10(C) on the 185.
As for the Idle up? The only thing i could come up with is taking out pin 17 of the IJ1 connector (from original idle up vsv) and plug it into the normal pin 23?? or perhaps even tie the original wire off from the IJ1 connector to activate it, that way you still get the signal to the amplifier... ughhh. I will say you should try and use your original VSV idle up instead of the gen3.. maybe that's your problem???
I don't know what else to say about all this. I have to deal with it when mine goes in near the end of this month. so yeah I am trying to figure it out before then. oh yeah, one last thing. The only difference between the two pumps that I could find is the color of the wires.. and. that... possibly.. the 185 might have a RPM sensor and the 205 is a "lock sensor"?? I have no idea if this will help at all. I am still going through everything to figure out functions!! AGHHH what a head ache