can hv bat ecus be swapped with reconfiguring?

I installed a 6 mth old nearly new battery, obtained from a 2008 Prius wreck, in my 2005 Prius, but it came with a battery ecu so I left it in place in the new battery assembly and installed the entire assembly in my car. Will my 2005 car accept the 2008 donor car ecu without any reconfiguration?

I could swap my 2005 ecu back in but I thought I would keep it simple and not swap them just to save time during installation.

I'm having some weird displays on the mfd where when stopped the engine is still running but the mfd does not show the correct arrow showing the engine at work. I am having some trouble getting the emission monitors to pass so I thought perhaps this 2008 bat ecu might be a problem.

 

Thanks for the ecu tip. The labels match so I will leave the 2008 one installed. I think my intermittent problems are likely due to a weak 4 year old 12v aux battery, based on the test of the voltage dropping to 10v one minute after turning the head lights on. I'll try to get a new 12v battery tomorrow.

I posted the sn on the forum and member dolj decoded it for me and found a manf date of 09 Feb 17 so I think I got a fresh one.

I installed the hv bat Sunday and have just put 20 miles on it. The registration is expired since I could not get an emissions inspection for last year while it was down due to the hv bat failure, so I have to stay in my subdivision and drive laps to avoid the chance of getting a ticket and perhaps an impound for an expired registration (that happened to me with another sick car). Any tips about how to get the emission monitors to pass while riding around on residential streets? I may put the tag from my registered Explorer on it for a few hours and drive on the expressway if reqd to get TIS to tell me its ready for emission testing.

Thanks for the advice!

 

You guys were right about the need to change my 12v bat. I bought a new Toyota bat today for $200 and my 2005 Prius with a 6 month old hv bat is running great! Apparently swapping the hv bat ecu did not matter as you advised. Thanks for the invaluable advice! Now I just need to drive for a few hours to get ready for emission tests without getting stopped by the police for my expired tag.

 

I drove my car on the expressway for a 30 mile trip and found that all the monitors were complete and passed when I got home. I took it for emission inspection and it passed. Now my 2005 Prius with 249k miles has a new hv bat and is ready to drive again. I wonder how many miles I will be able to get out of it with the new hv bat?