Need a source for HV battery components

New PC member her making my first post. My girlfriend's Prius popped the red triangle of death on her way home from work. The OBD scanner gave me all sorts of weird codes-- after clearing the codes and driving it around, only code that recurred was p3030. After reading a blog post from Lucious Garage about faulty wiring on the no. 2 bus bar, I pulled out the HV battery and started tearing it apart...as expected, there is a massive amount of corrosion on both bus bars. I was able to clean and reassamble one side, but the no. 2 sensor side has fragile 20 ga wires and I've decided I'd just like to replace that part. When I pulled the wiring harness, I inspected the terminal on the hybrid battery control module, and found evidence of scorching and several pins had corroded away.

The good news is that the HV battery tested tested well (16.2-16.3 volts across each pack of cells) and so I think that replacing the HV ECU and the no 2 battery bus bar/wiring harness should be the remedy. I am having difficulty finding these components on the web or through my Toyota dealer. I am able to find the wiring bar online for gen i....does anyone know if there are any differences between a gen i and gen ii wiring harness? Also, a new HV ECU is about $500- are there any special considerations when purchasing/installing a new one? Has anyone ever successfully removed the port from the ECU breadboard and soldered in a clean one? Thanks for any and all input, folks! I can post pictures after Ive made a few posts...

 

2004-2009 Toyota Prius hybrid control module 89890-47080

is the part# for the ecu I need

 

toyota part number 82165-47030
is the part number for the gen 1 OEM harness...will it work for gen ii??

 

I can't post pics yet, but if you look at the thread Gen II codes P01AF P3030 P3056 | Page 2 | PriusChat, I am basically having the same problem that he illustrates with the corrosion on the harness and at the ecu. Sound like a fellow PC member helped him source parts...hoping I can find the same!

 

Thanks Patrick. Do you know if a replacement Battery ECU needs any kind of programming after installation or is it plug and play?

 

Awesome. Thanks for the advice, gents!

 

@exstudent -
Yes, I ordered the miniVCI, but I wanted to see what I could figure out before it arrived (I'm impatient, especially when giving the lady friend rides to work). Even without the proper software, the codes it threw were p3030, pa080, p3012, p3013-- all related to the hybrid battery, so I figured taking a look at the traction battery was a good place to start. After observing the damage on the traction battery control computer and wiring harness, I am sure that replacing these will be necessary even if more problems are discovered after I get it back together.



I was able to source the parts from a local junker who had a low mileage 2006 prius sitting under a pile of snow...after much digging, wrenching, and cursing, I have the wiring harness and a new ECU for cheap. Thanks for all the help, everyone!