Red Triangle + VCS + Brake System Warning + 'Problem'

So this is like an '08 possibly on its original battery and in Tennessee nice and warm and muggy and when it rains a lot of humidity It is highly possible that you have the high voltage battery leakage The quickest way to check for this if that's what you want to do is to pull the trunk liner out of the wheel well so you can see the spare standing and looking at the spare on the left hand side of the car is the safety plug for the hybrid battery from the high voltage system You put your finger in or you lift up on the top of the thing and then you push down and the plug will cam its way out into your hand withdraw the plug and looking at what would be facing you have to plug with inserted you'll see there's a plate that has little plastic ridges you can lift it up with the screwdriver it will reveal a fuse with a nut and a stud on each end now you're going to take the plug noting where the nut is maybe put a sharpie marker that you can see when the plug is inserted so you know what level the nut is The nuts important You're going to put the plug back in cam it back into the hole by lifting up on the hoop but before slamming down on the hoop we're going to stop there we're not going to slam the hoop down and engage the whole system now you're going to take your fluky test meter put it in DC volts and you're going to put the black lead to the battery case of the HV battery the silver case or one of the gold bolts right there staring at you You're going to take the red lead and reach around to where you put your mark on the hybrid battery plug and you want to touch the silver nut that should show DC voltage and the voltage should be running to zero if it never gets to zero you have a module leaking outside of the battery pack and that's not acceptable. And there should be a code for this if you have a capable scanner I know that Innova brand seem to do fairly well with the Prius they won't get everything but they get the codes that are important until you've used this scanner which is very inexpensive you may never need to move to the more expensive scanner or scan tools Believe me so you may want to try that first before you go out and get a $600 tablet scanning tool bi directional or not. With the age of your car it's location and what have you this is highly probable I've had this in three generation twos right down the road in Central North Carolina that I have personally fixed right here on my property It seems very common especially at age All of my generation twos are 08 and '09s so they're old and if you talking '04 and fives they're even older there is a lady local to me that has 470,000 I think it is on an original battery and the car still running fine so it is possible to do.

 

Try using a different app. First, try Car Scanner ELM OBD2, which is a good general app. Second, try the Dr. Prius app , which is good for the hybrid vehicle (HV) battery diagnostics.

If you are interested in purchasing a new scan tool, take a look at this thread:
https://priuschat.com/index.php?threads/232741/

 

You didn't need the maximeter All you needed to do was take the cover off the orange plug put it back in the orange plug hole and don't slam the plug down the last step put a regular DC voltmeter on one of the silver nuts on the orange plug that connects the fuse and right to the ground of the chassis or the battery one of the battery mounting bolts and you see the DC volts that needs to count down to zero if it doesn't never zeros you know you have the high voltage leaking business going on and you haven't even moved the battery yet then you can pull it all down and you can just clip the positive lead to the battery case and with the nuts and bus bars off check each one till you find the leaker and I usually change the module on each side of the leaker especially if it's got residue in between those modules My battery guy will give me three pieces to replace that one in the one on each side all balance ready to go drop them in squeeze them up attention to the bus bars and nuts and off we go