P3100 - Found the problem.

I just wanted to share my reseach on P3100.

Background: I live in Nashville, my house sits in a hill and my drive way is about 25 to 30 degrees slop. I ussualy park my Prius facing the streed (nose down). As you all remember, we had the biggest rain fall since 150 years this pased may. Well, after the rain passed (we did not get flooded because the house sits way high in the hill). The PRIUS will not go READY.
I used my ELM387 to read the CODES and got P3100.
I took apart most of the interior, MAIN Battery included, looking for signs of water. NONE to be found...

Yesterday I was looking at PRIUS DTC.PDF uploaded on another problem. on page 167 it shows the location of all main electrical parts.
The HV ECU is located under the glove compartment (ACTUALLY on the floor, where pasanger puts their feet.

I went to the passanger side, pulled the carpet, and there is was, all wet. Pull the computer (HV ECU) out, and removed the PC board. There is rust in the bottom components. The HV ECU is gone..

Now I am looking on Ebay for a replacement..
Does any one knows the correct replacement part.
MY car is 2001 and the part is 89981-4701. I found 89981-47061 on ebay..
Will this part work for my PRIUS?