Lost_To_A_K-Car wrote:>6) SR ECU to run the A/C compressor
Can you cite this?
From looking at the wiring diagrams, all it appears to be getting from the ECU is the throttle position. The analog unit needs the same information, I would think it would wire right up.
The cycling of the compressor is ECU controlled by input from the triple pressure switch. In addition, the IACV-FICD controls idle up when the A/C is engaged, again ECU controlled, and at WOT the A/C clutch is disengaged. Since the control head inputs are different, you need the SR ECU to piggyback the KA ECU, or you can reprogram the KA ECU to allow for the right inputs. That is what I've been told from a former 240.org list member who got it working in his car. I had concerns since I have an S14 climate controller, but I don't have A/C so it'll be a little easier for me, once I get a clip to work out of. The S13 and S14 might be different too, but you at least need the rest of the parts to even get started.