How Do You Know if Your Prius Hybrid Battery Is Dead

March 18, 2022 Post a Comment

How do i know if my HV (hybrid) battery is dying?? I have checked the 12v through the signal bank check on the MFD and it appears fine. Just want to know what o wait for and if there is a way to examination the hv battery.
I have a 2005 Prius with 155k miles. Seemed like the gas engine turning on more frequently and non able to "glide" equally finer.

Besides noticed that sometimes the auto on the screen will evidence the tires moving, merely there will be no arrows/colors shown.

Whatever ideas?
Joined:

May eleven, 2005

96,065

43,550

0

Location:

boston

Vehicle:

2012 Prius Plug-in

Model:

Plug-in Base

usually, you get-go getting more rapid cycling of the bombardment meter and reduced mpg's.
As "bisco" states rapid charge and discharge on the colored bars display "going from full charge to full discharge and back in a few seconds" is often a sure sign.
You may go an extended life from the battery by having it balance charged. This can be done yourself if y'all are able to work on high voltage electrical systems, or in that location may be someone close to you that can carry out the work. This is all-time washed earlier whatsoever mistake codes and alarm lights appear. Many threads on PC about this.
Buying a Mini VCI with Techstream software and using a laptop will enable you to check the full general condition of the battery. This equipment is available on Ebay for effectually $25, and gives you dealer level of diagnostics on the Prius or any Toyota.
John (Britprius)
what is a balance charge and how can information technology be done?
Also, what can i exercise or learn by having the Mini VCI?
Joined:

Jul 10, 2013

55

19

0

Vehicle:

2005 Prius

When the Big ruby triangle comes on , time to pull a code. I had one bad jail cell, then replaced it, so a calendar month afterwards I had two more, once they get a certain age, they outset dropping similar flies. I finally cycled , and load tested all 28 cells, and weeded out the lame ones.
The Prius battery uses 168 cells in a serial chain. There are half dozen cells built into a unit chosen a module, and in that location are 28 modules.
Over the working life of all these cells "for a number of reason I volition not go into here" some cells will accept less charge than others "out of balance". The chapters of the whole battery is the aforementioned as that of the cell that has the everyman charge, "weakest link in the concatenation".
Residual charging is done by slowly overcharging the bombardment. Any cells with a total charge will take no more than charge and requite the energy off as heat, but cells with a lower state of charge will continue to charge until they to are fully charged. This means that at the end of the process all the cells should accept the same level of charge, "counterbalanced". The Prius cannot do this in normal functioning every bit it never charges the battery above 80% of capacity.
The simplest mode to balance charge is with a grid charger linked below.
The higher up should simply exist done if you are confident working on voltages of around 250 volts DC that tin can be lethal. Being in the U.k. I cannot advise on local workshops capable of this service, just no doubt someone in the US will add together this information to the thread.
The Mini VCI is a piece of diagnostic equipment that plugs into the OBD2 diagnostic port on the Prius and gives the ability with a laptop "preferably an old Windows XP or earlier" to await at the battery module voltages and resistance. This can give an indication of the land of the battery. The VCI tin also articulate fault codes and enable many service tasks that would normally require a trip to the dealer. This is a must if yous intend to do nigh of the piece of work on your motorcar, and will more than pay for it's self if it saves one trip to the dealer.

Employ the search feature to find many threads on battery balancing.

Traction Bombardment Preventative Maintenance - Hybrid Automotive Chargers

John (Britprius)
Coolride, merely curious... how many "bad cells" did you need to weed out in the end?
Many people kickoff out by just putting out fires (ie replacing simply the obvious ones) simply so after doing it a few times they empathise why test all of them for both capacity and load is the smarter route and is alot less hassle in the long run. Congrats on your rebuilt battery.
Joined:

May xvi, 2016

half dozen

1

0

Location:

Connecticut

Vehicle:

2013 Prius c

Model:

Northward/A

I have the same question.
If the battery (that powers my car) is about to die, will the dashboard on my Prius C warn me? (Year of car: Circa 2013). When I had a Toyota YARIS, there was never really any official warning from the car that the bombardment was near to die. And then one day I came dorsum to my car and it was dead. (What was actually frustrating is that I got regular oil changes, and regular inspections, and never one time did they tell me my battery was near to die. I'grand pretty sure a normal iii indicate inspection doesn't include looking at the life of the battery. Why the hell not? If the inspection identify doesn't tell you lot that, and your car/dashboard doesn't tell you that, how can you have any advanced warning that yous're about to be marooned in a dangerous place? Or marooned in dangerous weather conditions?! THAT'S A Safe HAZARD TO ME!)

Now that I have a Prius, I need to know if the same lack-of-warning should be expected (like the Yaris incident), or I need to know if the dashboard will tell me that my battery is well-nigh to die. I realize there is a dashboard menu in my auto that shows bombardment life, just I never switch to that menu. I'm e'er on the card that shows the temperature outside. And then if I'g not on the bill of fare with the battery, volition in that location exist some kind of text that comes on to my dashboard to warn me that my battery is about to die?

Someone said I can elevator upward the hood and look for some eyeball red/green image on the battery? I suppose I could do that, simply that's kind of a terrible suggestion because months from at present when I forget all almost this subject field, I won't think to look at the bombardment under the hood. That's why I desire to know if the Prius volition give a dashboard readout warning you if your battery is well-nigh to dice.

(Side note, My question has Nil to do with the Toyota people telling me or not telling that my bombardment is going to dice soon). The question is very unproblematic. Volition my Prius C (circa 2013) tell me on the dashboard 'your car battery is going to die soon'??? I've googled this question until I'm blueish in the face and all the results that seem to come up up are results similar 'preparing for prius hybrid failure', 'what are the alarm signs', or 'what to exercise when your battery dies'. (WHEN information technology dies? That's not helpful, I don't want to know what happens later death, I want a warning BEFORE death!) I read the manufactures and they don't even address my question. Not sure why I can't discover the direct answer to my question through an internet search, and so I'yard guessing that that hints towards the answer of 'no, your prius will not tell you/warn you verbatim on your dashboard that your battery is virtually to die before long'.
Joined:

May 11, 2005

96,065

43,550

0

Location:

boston

Vehicle:

2012 Prius Plug-in

Model:

Plug-in Base
Joined:

Aug 23, 2015

1,011

482

0

Location:

Nh

Vehicle:

2017 Prius Prime number

Model:

Plug-in Advanced

The prius 12v is a deep prison cell battery, it can die and be charged once more, somewhat.
IT's likewise really pocket-size and leaving the car in accessory mode will drain it in well-nigh 15 minutes, the yaris has a regular, larger, 12v battery, it won't die in 15 minutes, both batteries last 4 or 5 years, the traction bombardment is good for 5 or 6 years, balancing it is good, replacing information technology with a factory new battery is the manner to go, 2500$ and some other 5 or 6 years of proficient mpg'southward.
No, there'due south no idiot lite to tell you either is dying.
Do the math
Joined:

Jan 6, 2016

27

3

0

Location:

Pennsylvania

Vehicle:

2006 Prius

Model:

N/A

Yous tin pay Toyota $99 and they'll cheque it for you lot ... Do the install yourself though ... Get a Dorman battery, and picket youtube on how to exercise it. I only successfully replaced mine - 2006 with 153K on there. I got the cerise triangle of decease ... that's how I found out.
Joined:

Sep i, 2017

1

0

0

Location:

Palm Desert

Vehicle:

2005 Prius

Model:

Five

Information technology's been quite a few years. I was wondering if other batteries went afterward you lot weeded out the lame ones as you put it. We have a 2005 with 120,000 miles and are trying to determine if we become rid of this machine or our other one. Don't need two cars anymore. Thanks in advance.
Joined:

Apr 22, 2009

5,414

iii,643

0

Location:

So. Texas

Vehicle:

Other Hybrid

This decides information technology. If even so on the original battery, your 2005 WILL fail sooner rather than afterward. When exactly? No i tin tell you for sure only it will happen. Since you say yous no longer need ii cars and if the prius is not getting used much, that can apace kill an already weak battery. BTDT.
Joined:

May eleven, 2005

96,065

43,550

0

Location:

boston

Vehicle:

2012 Prius Plug-in

Model:

Plug-in Base

welcome!
they all go somewhen, get rid of this 1 earlier the headaches commencement.