I checked a different source today and they indeed do not show a crank sensor, but they do list a carburetor for your engine, which is not correct.
I don't have a wiring diagram in front of me but I suspect the resistance readings you found are normal. The "ASD input" comes from the relay contact that gets energized when the relay turns on. The computer turns the relay on, and that terminal tells it it was successful. Also tied to that circuit is the ignition coil, injectors, alternator field, and oxygen sensor heaters. The fuel pump relay's coil, or the fuel pump, (when a separate fuel pump relay isn't used), will be on that circuit too. That coil, and all of the other things on that circuit could have a combined resistance of around 32 ohms, so your ohm meter would read 32 ohms between terminal 10 and any ground wires.
Another way of looking at it is there's 32 ohms of resistance to ground on that circuit. Using Ohm' Law to calculate current flow, (current = volts / resistance), 12 volts divided by 32 ohms equals.375 amps. That's not much. That circuit is usually protected with a 15 or 20 amp fuse on newer vehicles, or a rather substantial fuse link wire on older ones.
There is very little that can be wrong with the wiring that will damage the Engine Computer. The biggest threat is if the 5.0 volt supply wire to most of the sensors is grounded, but the computer will simply detect that and shut the supply down to protect it. Once the short is removed, you just turn the ignition switch off and back on to reset it.
Friday, April 11th, 2014 AT 4:59 PM