Lit up dash, doesn't turn over. Won't move.

My guess is going to be high voltage ground fault on the hybrid battery itself. On the Gen 2 this will lock the entire car up so that it cannot be moved. You can clear The code by disconnecting the 12 volt battery and then reconnecting it after a minute or so. This will give you time to move the car back down to park it. You will need a code reader and the Toyota program to pull the codes on it. If your dealership is close by, you could baby it into the dealership but it is risky as that battery could potentially catch fire. If at any time you shut the car off it will not move again without clearing the code.

 

11.9 ain't good

 

I live near you in West Olympia... Your 12v needs to stay up above 12.6v to be healthy. I could help with reading error codes and diagnosis, as well as new battery install. I recommend these ones: 12V 55Ah Rechargeable SLA AGM Battery for Wind, Solar, and Off Grid Power | eBay Also if you want to check you own error codes and clear them so you don't get stranded it's always good to have one of these in your glove box and Dr. Prius app on your phone: Hybrid battery diagnostic and repair tool for Toyota and Lexus

 

This is definitely your 12v battery... First step before working on a hybrid battery pack with no error codes is replacing the 12v battery. 11.9v is going to create electrical chaos when the car powers up. Also here's correct way to measure battery voltage:

From Ed The Fox:

12.2 volts after a charge is death. It should be at least 12.6 your 12.2 means the battery is not capable of holding a charge or not capable of charging to full capacity because it is sulphated and with a load on it probably goes to 10.5 volts. I would guess its been jumped a few times and was discharged at some point to zero volts which is really really hard on a 12 volt battery.

Just charging a suspect battery and not seeing what it does under even a minor load is meaningless which is exactly what we see alot with the hybrid battery DIY repairs. Lots of nubes just charge up the hybrid battery modules and measure them and they look ok so they think cool its all good.

Soon after installation of there "rebuilt" battery it throws the RTOD again and there perplexed.

Battery 101.

Here's a minor load:
With car off measure voltage at front jump point. Do not ever measure battery voltage at the battery itself that is meaningless it only matters what the voltage looks like on your dc volt meter at the front black fuse box input which is the front jump point. The front jump bolt is bolting down the main power cable from the battery after it goes through a 100 amp fuse in the black plastic assy that's bolted to the top of the pos post of the battery...

Then with car STILL OFF turn on headlights in high beam for 5 minutes. Shut the high beams off after 5 let it sit a minute then with car STILL OFF measure dc again at front JP bolt. Your car will fail that test big time.
A healthy battery will not drop 1 volt on this very minor load test.

 

You're flying blind without any Dr. Prius or Toyota Techstream real time data, as well as not knowing primary and secondary error codes. Did you check the voltage sensor harness where it plugs into ECU for corrosion? That's the least expensive fix.

I could put together a loaner pack for you once you find that's needed. But we're still in diagnostic stage.

 

could be more corrosion at different connectors, i would still make sure the 12v is good

 

Looks like you have an aftermarket rebuilt pack and aftermarket plug as well... Do you know who built the pack?

As for getting Dr. Prius to connect, I had to buy several OBD2 readers before I got one that worked. It's a hassle for sure!

And did you ever get your 12v battery to hold a charge above 12.6v? I'd make sure you have that resolved before putting too much effort in elsewhere.

Also you aren't too far of a drive away from me if you want to borrow one of my code readers? I could drive it out there if need be?

 

14 is the inverter, not the 12v. 12.4 and 11.9 are borderline, may or may not be the problem