Last post on Nov 06, 2012 at 7:45 PM
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Toyota Prius, Electrical
#114 of 149 2005 Prius battery falure = brakes failure
May 19, 2009 (7:37 pm)
/Lets start at the top.. I was on the freeway in the fast trak doing about 65mph. All of a sudden the hybrid engine failure light came on, an then almost all the other lights came on. I figured it was time to pull over first chance I get. At the end of the fast trak cars were slowing down. When I pressed my brake pedal I found out I had like NONE. The anti lock brakes did not work. I was pushing everything I could down to help me stop and only one tire locked up and it was smoken. I did stop (must of done something good once) and was able to pull to the side and call a tow truck and have it towed 50 miles to my dealer, Torrance Toyota. That was Friday day 1 of my saga.
Day 2 Saturday the Dealer wanted the top mechanic to look at and see if he can figure out what happened.
Day 3 was Sunday.. nothing got done
Day 4 Monday the mechanic thinks it was the battery but wanted to drive it for a while to make sure. He drove it like 7 miles according to the a rep.
Day 5 Tuesday still thinks its just the battery, and that controls the computer. That's why the anti lock brakes didn't work.
Battery went dead when I was driving it on the freeway at 65 miles a hour? The Question is and I can't get an answer is Why did it go dead, when caused it?
Thats not normal. Dead batteries don't start cars, not go dead when they are running and the Prius never died out, even when it was on the side of the road. And I was able to start it to move it when tow truck came.
If a car does that then its a car you shouldn't own. If a battery can go out and cause the brakes to go out when your driving at high speeds, your just asking to get killed in it one day!!
The dealer still has my car, today will be Day 6 and maybe he'll put a battery in it. But Torrance Toyota wants me to pay for it. The 7 year battery warranty he said does not cover that battery. That one only has a 3 year. I've only had it 3 1/2 years, and if I gotta pay over 200 bucks to fix that.. well it sucks. I got my Toyota van with 300,000 miles that nothing ever goes wrong with it.. sometimes I wish something would so I can get a new one.
#115 of 149 Re: 2005 Prius battery falure = brakes failure [aleknit]
May 20, 2009 (8:32 pm)
Well it appears the symptoms you describe have nothing to do with the small computer battery. The battery's sole purpose is to start the computer up and then the traction battery provides the juice to start the car. I am surprised that they still haven't provided you with a diagnosis yet. That is really scary !!! Keep us updated on your prognosis.
#116 of 149 Re: 2005 Prius battery falure = brakes failure [aleknit]
May 25, 2009 (4:11 pm)
Make sure your 2005 has the software update that dealt with that problem.
The software bug allowed a sensor failure to shut down the ICE engine which then results in a low or dead traction battery a few minutes later. There were several dozen similar reports in 2006, none from owners that had the software TSB applied.
#117 of 149 purchasing an '05
Jul 04, 2009 (12:18 pm)
Hi, I am hoping to hear more about this.... we have an '08 that has been flawless to date, but I am looking at picking up a low mileage '05.
I will call the dealer with the VIN and see what they will be willing to tell me.
Any information on potential "issues" with the '05 model would be very good to know prior to purchase.
#118 of 149 How do you charge Prius Batteries.
Aug 17, 2009 (3:35 am)
Hi everyone new to this site. I am an over the road truck driver. I have a 2003 Toyota Prius that I have not driven since October of 07. It is completely dead. How do I recharge the batteries. I called the dealer and asked them they said that I should have jumper posts under the hood, but I can not see anywhere to connect cables to. Also should I use a trickle charger or just jumper cables connected to another vehicle. Any advice would be helpful.
#119 of 149 Re: How do you charge Prius Batteries. [walcrawler]
Aug 17, 2009 (9:04 am)
Wow, a 7 year old battery that has sat for the last 3 years??? I believe I'd just replace it.
#120 of 149 Re: How do you charge Prius Batteries. [wvgasguy]
Aug 17, 2009 (11:55 pm)
Replace the small 12 volt battery at a dealer. There should not be an issue with the traction battery. Once you get the car started you may want to consider having someone start it periodically for you. I know what it is like for OTR truckers and sometimes you're gone for close to a month (depending on who you work for). Good luck and keep us posted!!!
#121 of 149 Weak Battery symtom???
Aug 31, 2009 (4:33 pm)
Intermittently when my wife goes to get in our 05 Prius she will get a long steady beep until she gets in the car and closes the door. I have checked out the manual and replaced the battery in the key fob. She tells me it is still doing it. It has never done it for me. I am suspicious of the 12volt battery. Any thoughts out there?
#122 of 149 Re: Weak Battery symtom??? [glouderback]
Aug 31, 2009 (11:30 pm)
The 12v battery will give some other warnings that it is in need of replacement. If I were you, I'd check the voltage and make sure it is around 13.8 +/- Also, check the operation of various electrical components without starting the vehicle. Based on the fact you have an 05 it may be time to change it. It is good preventive maint because they last 4 or 5 years. I just changed mine and I have a 2004. I bought it online for $107 shipping incl and installed it with a friend.
#123 of 149 Re: Weak Battery symtom??? [jpeters1970]
Sep 01, 2009 (8:36 am)
Thanks for the info. That $107 sounds like a good deal. Can I ask for the link?