Hybrid System Warning Light

welcome!

hard to say without reading the trouble codes.

 

If this is a survey........ I vote very since your dad decided to drive it back home with the warning lights blazing and the car obviously limping along. As bisco stated, you need to read the codes. Many generic OBDII code scanners can read some of the Prius unique codes like P0A80 and P3011 which is the code for battery block 1. It's very likely that a cell in one or more of the modules has failed. Maybe you'll be lucky but I doubt it. Why was the car sitting unused for a year?

 

A 2005 battery is getting old and weak and letting it sit unused for so long most likely finally killed it. Getting the trouble codes read will tell for sure.

 

This is very similar scenario to my 06 which, as of this weekend, became my sons daily driver. See the link in my signature on what happen with it after sitting with weak modules.

 

if you don't mind yanking the battery every once in a while, you can learn how to match modules and replace them as necessary.

 

See the link in my signature below for how I did it.

GOOD LUCK!

 

if you don't get any help here, you will have to read through the battery rebuild threads.

 

IMO, that pack is a goner. Hopefully some of the rebuilders who participate here will give their 2 cents.

 

That is a LOT of dead modules in one pack.

I started with two, charged them with a GOOD RC charger, reinstalled the pack and now have 3 bad modules by voltage. My mistake? Not DISCHARGING and recharging them prior to testing.

You cannot tell the health or capacity of a battery without LOAD TESTING and I know better, but tried to cheat and got caught.

You only need about a 1amp draw on these to tell if they are salvageable, lower might work too but much more can do damage. I plan to use a 1156/1157 bulb once all the modules are recharged for testing purposes, so I can have some confidence that installing the pack is worthwhile. If I get three or more failures I will upgrade the pack because messing with this is no longer worth my time.

 

Doubtful I am the only person here who would be interested in knowing where one can get a new battery for $1400+ these days?

Thanks!

 

You cannot buy a new battery for that price ($1400).

For a battery that has been sitting a year it is better do some charge/discharge cycles to exercise it, Before driving it.
As you can imagine, the battery gets out of balance after sitting for a year.

If it wasn't damaged to begin with, it likely got damaged when driven in an unbalanced state.

Hopefully other electrical components were not damaged by driving in this state.

Since money is tight, why not build a pack charger yourself. Only cost you $60 or so using power supplies. Would be quicker and you'll need it after the rebuild.

That is a lot of failed modules. Increasing the likelihood of not working out.

With numerous failed modules, you may want to find a different pack from a junkyard. It will be as big of a crap shoot as yours, but maybe you can find one with less failed modules.


Where are you located in Illinois?
I have some modules you could come pick up in Madison, WI.

 

I can talk to you more about via phone and in person.
Glad to help.