Phil,

I recall reading (with incredulity) a clear diagnosis of ICM internal failure, duplicated reliably by either heat or cold. It was corroborated by someone else on this (or maybe another) board in whose experience it was the opposite temp swing that brought about the trouble.

What made this stand out, was it went against my assessment of the V/C module as "bulletproof" which was, in my mind, one of Chrysler's accomplishments in designing electronics to live under a hood with very wide temperature variations. I attributed this to the "soft" potting.

In fact, I remember discussing a Chrysler all-in-one CU, called something like that, which I had repaired for an '87 Caravan. The control unit contained fuel and ignition management, plus the external voltage regulator for the alternator. My repair was obvious and easy -- a small ceramic capacitor did not get inundated by the potting, so it succumbed to the moisture exposure and shorted out. It was the voltage regulator that got fixed. Must have been on TB.

Anyway, that little diversion is just to confirm my memory of the discussion, and make me feel a little better about having picked up a spare in the junkyard long ago, just in case I needed to swap in one of those bulletproof V/C ignition controllers -- yeah, the ones purported to have single-use pins on the connector. Really, I suspect, there was some miscommunication between Chrysler and the volvo engineers on the correct contact dimensions for the ICM harness connector -- after all, it suffered on the Bosch side too, at the hall sensor after the white cap got phased out.

In case the O/P finds this TL;DR -- definitely consider swapping the V/C module. No, there is no such thing as a newer version, unless you like mod projects and want to go for Bosch EZ117K from a 7 series like the TB'ers do.
--
Art Benstein near Baltimore

Mothers of teens now know why some animals eat their young.