Would it be safe to Jumpstart my car in this situation??

'Battery Tender' is one brand name.
'Battery Maintainers' are another more generic name.
You can go miles and miles deep on the subject, but my understanding is that G2s have an AGM battery.
This is a lead-acid battery that has an absorbent glass mat fiber separator between the positive and negative plates to keep stuff from sloshing around.

You can buy the brand name for about $50, a middle shelf unit (Ever Start) at Wally for $20, or go with the $9 battery maintainer from Harbour Freight.
In your case they will all do roughly the same thing.

I don't know enough about the pump/sensors to guess.
As far as the battery is concerned you can disconnect it to eliminate any parasitic loading it and charge it completely with a tender/maintainer.
G2 batteries are somewhat notoriously undersized, and if yours is more than 4-5 years old you may want to replace it.


Good Luck!

 

What exactly are you calling the sensor? I'm not aware of any sensor on the ICWP.

 

Sensor? Battery dying while changing the inverter coolant pump You must have been doing a whole lot of things and had a whole lot of things undone in vertical coolant pump is behind the headlight there's not a sensor anywhere back there for you to get soaking wet that will cause anything like you have going on Just put up the codes generally is the best way to get interpretations telling us that the sensor says it's bad on the machine yeah okay sounds good nobody knows what it is sounds like you have multiple things wrong on some kind of generation to Prius You're making modeling all that and codes will go long ways to getting answers suggestions etc.