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function of the crank/rpm sensor???? 900

posted by  Brian S on  Thu Dec 11 10:21 CST 2003
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Lots of good responses. It sounds to me like you're looking at what happens at the very beginning of the cycle, to prevent the car from starting.

When you turn the key to start the car, the starter motor turns the flexplate or flywheel. If the RPM sensor is functioning, it can "see" this motion and give a signal to the computers to provide spark, etc. If the RPM sensor is not functioning, it can't see the flexplate being turned by the starter, and no signal is given to start the spark.

At least I think that's how it works...

- Brian






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