Hybrid System Question

Look at the freeze frame data for the P0A80. It will show all battery data from when it coded.

Directly to the left of the code, there will be a snowflake icon. Click on it. That's the freezeframe data.

Also look at shortwave highest value. This is a measurement of the HV isolation. 5.00 volts is perfect. The lower the voltage reading, the worse the condition of the HV isolation to the car body. This should be under hybrid system, not under the HV battery screen. May be different for different versions of TS.

 

Simply looking at the data when the car is at rest may not expose the problem.

You should put the battery under some stress by aggressively charging or discharging it while watching the data.
For example power brake it.
Take a pic of the screen that shows the battery block data.

Did you happen to note what the Delta SOC value was. Is it under 20?

Be careful about multiple successive clearing of battery errors. It can turn into a real mess if a battery module pops/bursts back there.

 

Haven’t heard of this technique before.

 

Looks like block 5 has a bad cell.

I’d start there.

 

Not just block 5, but all the modules in that pack are put of balance. You probably need to opened up that pack, and take a look.
From the short wave frequency, being below, 4.99htz, that tells me that the modules in the pack may have suffered a lot of leaks either from their terminal posts, or the plastic housing the cells themselves.

 

After looking at those attachments, I would say "moneyshot". Look at the short wave highest value. You have significant problem with your HV isolation. Along with that, your ENTIRE battery has been depleted. Obviously, block 5 is the weakest and appears to have a dead cell, but that battery is probably at 3-4% SOC MAX.

I'll step back just a sec, I guess it would make a big difference whether this freeze frame was from a code that came in under hard accel or if it was a code that came in with no load applied. If hard accel, then the voltages are probably as expected, with block 5 having a dead cell. I also agree with Dx that you'll probably find the HV isolation issue is inside the battery case. Look for discolored areas on the base plate. That's normally a giveaway for an electrolyte leak.

 

has anyone mentioned balancing?

 

Not yet, but smashing moles as their heads pop up from the ground w/a hammer is funner than hooking up additional cable harness to the hv battery.

 

Of after you've worked on the battery, and you get an isolation fault, you need to take a closer look at your transmission system. This is because from your statement, you said the problem came immediately you put it in drive.

 

Furthest away

 

is all the engine maintenance up to date? at 280k, it could be anything