wstar's Journal

wstar

UpRev Map-switching without the stock steering wheel stuff: I've figured out a solution for this, where you can just mount two pushbuttons wherever you want. One acts as Coast/Set, the other as Cancel, so you hold one and input the map number on the other as before. It just needs 3 resistors wired up to the 2 pushbuttons a certain way, and then in the end you hook that up to two pins on the main ECM.

The pins on the ECM are the Sky Blue + Yellow wires which are on pins 101 and 108 of connector M107 (which, of the 3 big connectors on the ECM, is the one that's rearmost on the car and runs to the main wiring harness under the dash, as opposed to the other two that run straight over into the engine bay).

I'll post up a circuit diagram and whatnot once I've actually tested it and I know I'm not leading people down some horrible path of breakage. Might be sometime later this week.

I'm also looking at some 7AT hacks, but I don't have anything to report from experiments yet, just ideas from staring at wiring diagrams. The first one on my priority list is I'm thinking it's possible to put a hard toggle switch on the dash that switches between the normal behavior and "D is always M". Meaning when you move the lever into D, the car goes into M-mode and the paddle shifters are always good to go (although obviously you won't be able to use +/- controls on the floor stick until you move it over into the actual M position).

The rationale here is that it's really easy to accidentally bump the stick sideways with your hand/arm and drop out of M into D, which means you lose your current gearing because it auto-upshifts for you almost immediately, etc. It's happened to me a few times, and I just don't want that to happen again ever. I could just hardwire the D-mode away permanently, but I figure it might be nice to at least have a toggle switch somewhere to revert to true D-mode.

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