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How did you implement the ground on 14? Pull the wire out of the loom, strip and split? Or did you solder a jumper on the ECU board itself? I'm thinking there's a possibility something got bumped or moved during the operation, unless you can think of an electrical reason the ground might have taken effect.
No, the ECU-30 wouldn't prevent cranking. That's the job of a switch that's good for multiple amperes attached to the shifter lever. The zero ohms you saw reads through that switch and the heavy windings of the starter's solenoid.
But, yes, it could be the 30 signal is there to allow the fuel to be adjusted for the load of the automatic's torque converter. One pin description I have says "Raising engine idle speed." Prevent complaints that the motor dies when shifted from park to drive. Just guessing here.
Data link connector? That's a new one for me. But I do remember reading a lot of enthusiast pinout descriptions out of Saabnet, etc., that appeared to be guesses no better than mine. And speaking of errors in print, there are many within the internal pages of the green book manuals, especially in electrical troubleshooting with ohmmeters. Just have to include a smidgen of skepticism sometimes. You can surely imagine how these procedures were developed ahead of the model's release.
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Art Benstein near Baltimore
A woman has the last word in any argument. Anything a man says after that is the beginning of a new argument.
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