Its not on the side of the intake manifold and its not on the radiator support in the front left corner. I checked location diagrams and there is nothing in those two locations that looks like ICM...

Is the ICM part of the PCM/ECU in a 1997?

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1997 Ford Ranger XLT, 2.3L, 5-Speed, 2wd

You should have the OBD-II system on your model year. I do not think there was any sort of ignition module. You should have a coil pack rather than distributor and single coil, and it is operated by the ECM.
tom

I have two coils and it is an OBD-II. So there's no separate ICM?

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1997 Ford Ranger XLT, 2.3L, 5-Speed, 2wd

You can quote me: "In a word, no."
tom