2007 Prius, ICE won't start

I have a 2007 Prius that had a rotational noise on acceleration. I bought it at an auction to sell. People love these, they sell super fast.
I pinpointed the noise to the transmission area and suspected something was wrong with the electric motor. I took it to a local transmission shop and they disassembled the transmission to replace a bearing.
After repairs, they called me and informed me that the hybrid battery needed to be replaced. I've been driving the car for about a week with the noise and had no indication of a battery problem, or any other problem.
I had them tow the car back to my shop. The hybrid battery was discharged. The battery blocks were all between 10 and 12 volts. The vehicle would move slowly, but the ICE wouldn't start up to charge the battery. It had one DTC for hybrid battery malfunction.
I removed the battery from my own Prius and installed it in the car. The ICE fired up right away and shut off soon after, which would be completely normal in my car. But the engine never started again. I drove a short distance all on electric. The battery bars depleted quickly. Regen braking was not operating. There was a shudder every so often on acceleration. I'm not sure if it's in the transmission or the ICE is attempting to start? There are no DTCs so far. The screen indicating where the power is going indicates that the engine is ON and delivering power even when it clearly is not.
Not sure where to go with this one. It seems really odd that the ICE started once and won't start up. I tried disconnecting the battery and starting over, but the ICE still does not start up.
I looked around the transmission for something disconnected, but found nothing.
I'm finding out how little I know about my own car.
Any ideas?

 

I don't think the car is junk. It's got only 84,000 miles and it's in good shape. And a junkyard tranny is cheap. The HV battery is in my car now and it is working fine. I suspect the DTC that set in the auction car was due to the fact that is was severely discharged. I have a Snap On MODIS for diag, but I don't have any information about what to look at. ALLDATA has no diagnostic info at all. In fact, most of what I've learned about how the car works is from this site and what I already know from working on the POS Fiat 500e.
I don't have a problem swapping transmissions, but I wouldn't mind confirming that the problem is with the transmission/motor assembly. Even with the datastream on my MODIS, I'm not really sure what I'm looking for. It does have a compression testing procedure to crank the engine on command, but I can't seem to get it to perform the function even

 

The MODIS has full functionality with a 2007 Prius. I may not have all the datastream PIDs, but I can access the HV battery, HV ECU, PCM to view datastream, codes (history, pending, active) , actuator tests, etc. There are no codes. No MILs.
Eric, I will call you when I get a break at work tomorrow. I'd love to diagnose this thing before I spend an entire weekend replacing the trans.
I expect that it is something that the transmission guy did when he took it apart. But I know things happen to cars and I want to find out exactly what is wrong before I tell him that I'm not paying for replacing the bearing. I would love to send it back to him and have him figure it out, but after talking with him, I don't think that he has the ability. I'm surprised he took it apart in the first place.

 

thanks for the info oz. "transaxle" is probably where i'd find most of what I am looking for as far as data. i'm probably not going to go out and buy a techstream, but I think that there are other ways to get Toyota software. one of the instructional courses I was at last year, the instructor had the Toyota diag software platform on his Toughbook. I don't know if that is a newer platform or not, but I'd bet that it would apply to a 2007 Prius.

 

The SOLUS doesn't do a lot of the actuator functions and system functions that the MODIS will. There is a procedure to go through to get it to crank. Either I'm doing it incorrectly or it doesn't function. I've had problems with Snap On software once or twice in the past where an actuator test was there, but it did not function.
I know there are no powertrain DTCs. If there were, the module would report it to the PCM and the PCM would set a DTC indicating it has received an error code from another module.
The ability to set codes and store them are obviously there. It had a battery code. But I think it's because it was so severely discharged.
It is strange that the Prius logic would allow it to drive without charging the battery to the point that it is so discharged that it will barely move and not set a DTC related to the condition. That in itself would be good diagnostic info, but I don't have the experience or the information to know

what that would indicate. Why does it keep cutting off the last part of my sentence?

 

Hey, sorry it took so long to get back to you guys about this. I know you're dying to know what the problem was. Ok, maybe just me.
Anyway, Patrick, I do not recall if there were any MILs on. I don't think so. The MODIS will access the PCM, HVECU, and HV Battery for data, codes, etc. and no DTCs in those modules. However it was not a mechanical issue. Well, kind of, but not really.
The original trans guy claimed to have repaired a bearing in the transmission. Upon further inspection, I believe he simply installed a junkyard transmission. There were no witness marks on the transmission indicating disassembly and more importantly, no new sealant. A junkyard transmission was installed and upon assembling the inverter, the wires were crossed. The retarded part is that the wires are marked and the dumbass couldn't even follow his own marks. We installed the wires correctly, drove the vehicle, and bliss ... a beautiful 2007 Prius, ready for resale.
I still don't understand why it started the first time and never did start again. But it works and I did not have to R & R a Prius tranny. I'd rather fool around with deadly HV wires any day!