Help With HV Traction Battery - Voltage(s)

Hello. I am getting the four DTC's P1A64, P1A67, P1A61, P31AB. The full story is this:
-The ICE was replaced
-The vehicle will not start (tried to, but only sounded like a drill if you pulled the trigger only slightly)
-The vehicle was driven with a dead ICE prior to replacement, so the battery was already very low
-The vehicle does not seem to be willing to charge with the EV cable even
-The vehicle threw two of the aforementioned codes
-The cells were all around 3.3, so I used a vehicle charger in groups of 4 to bring them to between 3.55 and 3.62 volts
-The vehicle now throws all four of the codes mentioned pertaining to low voltage
-The 150A fuse is good
-The voltage coming off of the two ends of the cells (orange cables) is about 203v
-The voltage at the terminal coming off of the battery (two large white/black cables) is 0v

Is there any way to proceed from here? Are those two terminals supposed to be 0v? Where do I check the output to the vehicle? Is there anything else to check that could be causing these codes? One last thing, should the EV charger still charge the battery despite these codes? I don't expect so, but am curious. Thank you for your help!

 

Time to cry, 95k. They denied any sort of warranty claim to the battery or hybrid system because the ICE was not replaced by Toyota.

 

It's actually not my car -- a family member purchased it from a shady "pre-owned" car lot. They 'rebuilt' the motor allegedly. Rod right through the block. It has been owned for about 5k miles.

 

At any rate, I'm doing my damnedest to get this going for them, but I'm not a Toyota tech or anything. Shade-tree mechanic with a background in electronics repair, but not much to do when it comes to such a complex hybrid system.

 

Damn. Wondering if anyone has any knowledge on where to test the voltage from the battery. I have one torn apart, do you guys want pictures? At least I can try to be useful to someone else while being lost, heh.

 

The codes mean "Hybrid Battery Cell Low Voltage Stack (A-D)". Meaning, I wonder if the car is not seeing the battery at all, or if if is just seeing all four as very low.

I do not have Techstream, but I just ordered the bootleg version two-day so it should be here tomorrow. We'll see how that goes.

 

Well, I'm waiting for my TechStream to stream its' arse here, but is there anyone out there with a Plug-In model that is willing to test the voltage in the front-passenger side of the battery (between the seats) of the thick black and white cables, connecting to the battery (under a few bolt shield, with the orange clip on it)? I am interested if there is supposed to be voltage here, I really feel like these are probably the battery's output terminals, but they have nothing on them. The only thing I can think of is that perhaps they are switched power somehow, such as a relay?

Anyhow, if someone could confirm that I'd greatly appreciate it. Thanks!

 

Wow, such an influx of suggestions and helpful advice, thank you!
-I was wondering that, if there were relays that control the voltage out. Thank you for your confirmation of that.
-There is indeed proper voltage at the + and - onto the black 'plate' that seems to go to the relays and/or terminals out
-That makes sense, the ECU controlling voltage out.
-Is it necessary to discharge them? Or should I try to bring the voltages closer to 3.7v?
-If the latter is true, can I simply put 3 in series (11.1v) and use car batteries at 12.5v to charge them to 3.7?

I suppose at this point, I'm wondering if the codes are indeed correct or if I did something wrong.
How far 'apart' can cells be voltage wise before the ECU wigs out?

I did note that a Modis used to read the codes and info (I only had general info since I don't have the proper personality key for this new a Toyota) said "Hybrid Battery Life: 24%". I'm not sure if that's the hybrid battery itself overall (expected life span) or actually the read charge state (e.g. 24% charged).

I have a Techstream MVCI adapter coming soon (Tuesday-Wednesday is my guess), and am trying to find a way to get a copy of the 13.x Techstream software. I note that most places it is available from 'alternative sources' seem to want an activation key, only obtainable from paid membership forum users. So I'm looking for a way around that, in the meantime.