Some of my previous posts described a problem with my older Cadillac. There is a permanent magnetic two-wire sensor buried deep in the transmission. I generates an AC signal, and I think, a sine wave. Minimum required output spec's to the cars computer (ECM) are 5.5 VAC and 540 Hz, when operating properly. I cannot easily get to it an replace it, as it is extensive labor. I'd rather just bypass it, since the car runs normally anyway, just the "Check Engine" light stays on. Some of the older Cadillac guys stated they use an op amp circuit, but no further details. I have came close to solving the problems with various circuits that several members provided me. Just wondering if I can make a simple 9-12 volt oscillator circuit that will produce the peak to peak sine wave at 550 Hz or more and thus place it in place in lieu of the sensor? Any examples or schematics would be greatly appreciated. Thanks !
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