P0AFA & P3000 after replacing hybrid Battery. Looks like battery ECU has corrosion

If we're good, will you tell us what the codes are?

 

I think when you're saying "HV ECU" you mean the battery ECU (the HV ECU is up under the dash).

You've got one code from each; the P3000 is just the HV ECU saying "hmm, the battery ECU is reporting some kind of weirdness, have you talked to him?", and the P0AFA is the battery ECU saying "umm, yeah, I'm getting these weird voltage readings from the modules", so that's definitely related to the connection there. It would be interesting to pull up what the 14 readings are showing up as.

 

Affirmative.

 

Many people will get a dongle that can be used with a phone app like Dr. Prius or, perhaps even better, one that will work with a laptop and Techstream, because it can be so helpful so many times to be able to see what your car is telling you.

Otherwise, if you are absolutely sure the voltage sense wiring can't possibly be the problem, then the ECU would be the other thing that's left. If I had Techstream or Dr. Prius, I would be looking at the readings just to double check my absolutely sures and my can't possiblys.

 

I would be looking at exactly what the ECU says it is reading on each of the 14 inputs.

Then I could combine that information with extra careful physical inspection of the wires, especially the ones involved in weird readings. Maybe take some readings of my own with a meter I trust and compare to what the ECU says it is seeing. I'm sure you can think of variations along those lines.

The question boils down to, does the ECU think reading x is weird voltage y because weird y really is arriving at the ECU on that input, or is it getting sane voltage v and misreading it?

 

Top 3 from right look discolored white ashy look to them ? Right in picture. Junk yard have all ya want to remove.

SM-A715F ?

 

That's the sort of thing that almost makes you want to look at the voltage readings to see whether there are weird ones that correspond to the top three pins from right, or if the weird ones are different ones.

 

There you go being all logical again, (must be a character flaw ). Don't you know that testing requires EFFORT and reading and all that... stuff.

Much "better" (ie simpler) to load up the parts cannon and fire away. The target HAS to be somewhere between the front and rear bumpers. They'll hit the target- eventually.

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