I officially hate my prius and toyota

Why are you so evasive on this? If you told us what it read after being left overnight or say 8+ hours and it was "within spec", then we would rule it out as a problem.

You already got 75% of the way to checking the 12 volt's voltage via the MFD.

 

Ok, I think the best thing Brook could do is follow don_chuwish's advice above and find a dealer to visit. I hate to say this but for the rest of us I think we are :deadhorse:

 

Everyone!
Let him sell/trade the thing in. Someone will buy it, put in a thermostat, temp sensor or battery and be happy as a clam. 142 posts back and forth. Unreal.

 

..and several have asked you questions that you've refused to answer. Flat out refused.

So, they should help you more -- why?

 

First of refrain from insulting the members here who are trying to help you. Problem with your logic Brook is you've gone to mechanics and they've basically said sucks to be you. You've came here looking for advice and have gotten several bits of advice yet you still feel the members of this forum haven't helped you at all. I suggesd once again that you put down your Iphone and go to another dealership and hold them at gun point until they tell you something you want to hear. There is no way in hell Toyota would replace a HV bat unless it was throwing codes.

 

You certainly have a knack of choosing words that denigrate others, and generally tick them off. Good luck.

 

:wave::wave::wave::wave::
Dear TROLL SIDE,
Good luck. I'll be surprised if you get much more from all the stupid dummies on this forum. Good bye.

 

First off you go to a public place and ask for help, you will get help. Don't piss off the free help.

Every suggestion has been ignored. You went to one other dealership of the 6 in the immediate surrounding area from where you are. If you are actually an engineer then you should know that new things don't always work. They can be marginal or just DOA. The purpose of a diagnosis to to rule out all other possibilities. If you cut yourself and it hurts, I think you would appreciate the doctor looking at your cut rather than suggesting it is obviously a neuron disorder and we need to remove part of your brain to dull the pain.

I have seen brand new batteries be dead from the factory. The Prius doesnt "crank" like a normal car, so a dead/marginal battery can look fine unless you actually test it.

And your last statement of it probably being the hybrid battery failing is a load of crock. That is the LEAST likely scenario. If your battery was failing you would get wild and fast swings of the SOC with normal driving. Once it filled up (and quickly) the HV ECU would be happy and command the engine off. Then after you go and it quickly drained down to nothing, the HV ECU would start the engine back up to charge it again. This is not happening from the symptoms you provide.

If you want the help of the experts on here that in most cases know as much if not more about the Prius than the original engineers that designed the damn thing, then just shut up and follow directions. Stop being defensive and evasive. Stop putting off the experts on here and then calling them back in.

If you are really ready to do anything like you suggested above, then get in your car and drive to the nearest dealer that has a Prius tech and a techstream and get the ECUs flashed. Call right now, see if they have the equiptment, make an appointment for a couple minutes from now, and go.

 

TROLL SIDE:

You have not chosen carefully, you have pretty much ticked off everyone. Very unusual for this forum. Take your Prius and do whatever you want with it. Bye now.

 

Then stop posting and just go away.

 

Summary
Reflash
12v Battery check (and connections)
Coolant thermostat
Demo time in Prius with a qualified tech
Good Luck :rockon:

 

+1

No, you've chosen to ignore many of the questions and tests asked by others and myself. Others were finally heeded after multiple requests. For instance, you never told us the 12 volt battery voltage even though you got 75% of the way to viewing it. I had to ask you repeatedly whether your commute had changed. We asked you many times to fill out the questionnaire before you finally did.

I've pointed out what I've heard are common symptoms of a failing HV battery. You might have some of them (like ICE running all the time). Others are the HV battery fan running at high speed and the SoC on the MFD taking big swings between empty/full in a short period of time.

As with all mileage complaints, we have been trying to identify and rule out causes such as short trip length, commute, driving habits, common problems we've encountered (and common fixes), etc. Again, I really wish someone near you could loan you a ScanGauge to observe coolant temps and whether the ICE reaching the proper temp.

 

Hello BROOKSIDE, I skipped pages 5-15, too repetitious. However I sympathize with your plight and hope you get the mileage problem solved. I only have ONE question: as Patrick suggested, did you ever reboot???? about your problems.= (Mad about your problems)

 

Since you claim to be a licensed electrician have you checked the voltage on your traction battery to see what those volts are? I do not know the normal voltage but someone here would.

 

Back in my mechanic-ing days I would have checked the temperature sender responsible for telling the ECU the coolant temperature as well as the actual temperature of the coolant, but I don't work as a mechanic any more.

Patrick Wong might know if there is a voltage spec or something for the temp sender. We have an electrician who must own a multimeter at the other end of the line, who knows what we might find.