Hybrid system Malfunction (Visit Your Dealership)

To find out things, which often is better than insisting the things you haven't found out must be the way your common sense says they must.

Booster packs are frequently used to boost conventional cars whose starters draw well over 100 amps. The duration is brief enough that the battery clips do not reach any troublesome temperature.

You skipped right over the 100-amp spike shown in post #101 (for a gen 2, courtesy of mr_guy_mann, who was interested in finding things out).

The spike is shown, but also quite instantaneous, a small fraction of a second, visible only as a vertical line in the trace. A spike that brief will hardly have a detectable effect on the battery clip temperatures.

The trace proves the presence of the spike (when the car is jumped from a source that can provide it). That does not necessarily prove that the car would have failed to start, or gone 'haywire' in any way, if jumped from a source with a lower current limit. That would be another thing to find out. There are plenty of things electrical that may draw a tall spike of current when the supply can source it, but will just draw a lower figure for a bit longer if that's what's available.

Surely there is a current limit too low for the start to succeed, but what that limit is could be another thing a person could systematically find out, and that might take less time than getting a lot of armchair PriusChatters to agree on what it must be.