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So the diagnostic interface cable was part of an upgrade package that included a new controller. Maybe you need one of the later controller versions to allow for interface and diagnostics.
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Correct and yes. There is an option to chose, and I have tried all. I believe the transceiver was only used for development of the module, and then was taken out as cost save as not needed. That is how we do ECU's at work, same thing.Followup - OK I am staring at the wiring PDF for the flange-mount CTIS controller, and I see there are actually two different diagnostic ports indicated. J1708 and J1939/CAN. You bought the NexIQ right and IIRC that interface supports both 1708 and 1939 protocols. I can tell you have put time into this, but just for the sake of asking, have you tried both ports? Does the software support both protocols? I haven't tried downloading it yet.
Yes, and interested in helping with the design, and potential manufacture. The other hobby is electronics and I've fab'ed up some custom boards for other projects. I envision two parts, the harness and a self contained processor / remote display panel that has a dash mount or even just a small display forward facing attached to the original ECU that would read out the codes or have simple code to send new pressures. Once we get the harness to work, sniffing out the codes should be easy, and I thought I already saw the diag codes on here already, but maybe I'm mixing it up with the DANA manual. Did you settle on J1939 or J1708? Assuming you went J1939 because of the terminations. I'll start checking the code libraries. I guess all that is really needed is 4 wires max off the harness right?It's not a difficult exercise with something like an Arduino. If a solution like this is of interest to people, please let me know.
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