Help understanding Techstream Health check?

Yes you did you got that bad boy working are you sure you're inverter coolant pump is working. because I see you don't have the traction control lights and all that mess on just to check engine light and your red triangle and if I'm not mistaken when that happens in my '09 Gen 2 I immediately whip up my reservoir top on the inverter jug and don't see coolant moving or the AM fuse is broken and under hood fuse box I believe this is I just went through this the other week too and hopefully have eliminated this problem but was just curious. If you had checked the inverter pump with the car ready you should be able to put your hand on it and feel it pumping with your hand on it you kind of feel the impeller movement if you will That's the only way I know how to explain it it's very subtle some people see lots of movement in the jug other people not so much you need to see some movement

 

Don't sweat the B1421; that just means there wasn't strong sun on the car at the time the codes were pulled.

The P3000 and P0A80 have to do with your traction battery.

C1241 is about voltage arriving at the brake electronics being too low. If you know there is a 12 V battery issue, that could be all it is. If the code returns after getting a good charged battery in there, then it is some wiring or connection issue on the way to the brake electronics, most likely.

I'd have to look up the B1200 and B1271 ... I don't have those off the top of my head. They aren't current codes, anyway.

 

I think it has to do with the fact that you don't have a lot of voltage and when you try to run the air if that's the case it's pulling the voltage into Oblivion and helping you get these weak battery pack codes I believe this is what was happening in my car right as the battery pack was getting really bad and getting ready to be replaced with a new one

 

Ready the car the engine need not be running Open the hood prop it up if you know where the inverter pump is reach down and put your hand on it do you feel it vibrating and running Make a note now go to the jug in between the engine and the inverter it's pink fluid in it hopefully undo the cap doesn't matter if it's hot or cold or it's not under any serious pressure like a radiator when you undo the cab you should be able to look at that pink fluid and see wavy lines in it like it is somewhat moving look carefully use your reading glasses if you have to it will not look like it's moving smartly also while under the hood crack the fuse box it's right behind your inverter pump in a little higher and look at the AM fuse I believe that's the fuse that goes to your inverter pump you want to make sure it's not blown which would cause no noise from the pump and no water moving many times the pump goes bad blows the fuse you try to replace the fuse it blows while you're standing there you know the pump is shorted and bad you buy a new one preferably not from the dealer but there are pros and cons once that done clear the codes and go for a drive and see if your water is moving more than it was when you checked it before.

 

I think the Gen 2 inverter coolant pump runs whenever the car is IG-ON. You don't even need to be in READY or have the engine running. You can take the inverter reservoir cap off. It is a system that can hold pressure, but normally not very much; its usual operating temperature is lower than the engine's.

 

Yes, open the cap, it is not pressurised and no need for the engine to be running. Putting it in IG-ON (two presses of the Power button with your foot OFF the brake pedal) will suffice. You are looking for the coolant to be flowing from front to back of the reservoir. If you see no movement, the pump is not working.

 

The last time I looked at a Gen 2 hose diagram, I was pretty sure the flow direction was back to front; hose G9226 carries the coolant from the nipple at the front of the reservoir to the inlet of the pump, and coolant ultimately returns through the inverter into the reservoir at the connection in back.

But you're looking for the coolant to be flowing, anyway.

 

Click on the freezeframe (snowflake icon) next to the P0A80 code. That will show you the data when it set the code, I think it has the battery block voltages as well. If a module has a shorted cell, then that block will have voltage that's 1.0 - 1.5V lower than the others.