Prius (2010-12) :: Green Ready Button Would Not Light Up - Low 12v Battery?

I've got a 2010 Prius w/ NAV. Yesterday morning, my Prius would not start. When I pressed on the brake, the green "Ready" button would not light up. When I pressed the start button, the NAV screen came on as did some of the dash lights, but the car engine itself was not on. When I hit the start button again, I had a yellow triangle on the left side of my screen that continued to blink.

From reviewing the forum, I believe that the issue is the 12V aux battery. I was able to get my car into maintenance mode, and the 12V battery was reading 8.6V; however, this was after my car had sat in the garage for 10 or so hours. However, by going into maintenance mode, I was again able to get my car to start. This morning, I drove my car to work (about a 15-20 minute drive). After I got to the office, I turned the car off and got back into maintenance mode. This time, it was reading 11.6V on the battery.

Am I correct that this is most likely an issue w/ the 12V battery going bad on me? I purchased my Prius in July 2010, and I have never changed the battery. It sounds like the "typical" lifespan for the battery is right around 4 years, so this seems to make sense.

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Prius (Gen 3) :: 2010 Would Not Start - Ready Light Does Not Come On

The 2010 Prius in our garage would not start today. I tried jump starting it with the 12 volt in our van, but the light on our smart jumper cables would not light up on the Prius side even when I switched them around. I followed the manual's five minutes revving and such, but the ready light does not come on in the Prius. There is enough power for the inside lights to come on, but they are dimmed. I'm thinking we left the lights on in the back seat dome area based on what my daughter told me. The car has not been driven for about 65 hours.

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Prius (2010-12) :: Not Turning On - Start Button Light Is Red And Park Button Flashes Green

My Pris 2010 would not start this morning. My wife tried to start the car this morning and it would not start. All the symbols on the display light up and would not go. She then tries to turn off the car, but the Triangle symbol with the exclamation mark within it lights up. The Start button light is red and the Park button flashes green. Added to that is the constant beep that you hear when you try to close the door with the keys in the car. I cannot even turn the steering wheel. I had to get it towed to the Toyota dealer and am was told that i would hear back tomorrow.

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Prius (Gen 2) :: MFD Shows All Green Bars Is Normal?

As I'm driving along, the normal battery strength on the MFD shows 5/6 blue bars but occasionally, it will change to the last but one green bar and sometimes all the bars go green.

Everything else is fine, no warning lights etc.

Is this a normal?

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Prius (2010-12) :: Ready Light On Whole Time On Dashboard

I noticed on the way home the "ready" light was on the whole time. I've never noticed it staying on before but maybe just didn't pay attention to it. Is it supposed to be on continuously? What exactly is it for?

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Prius (2010-12) :: ESC Light And Caution Triangle Comes On Then Go Off Before Ready Light Lit Up

Just bought a 2011 Prius and I love it. When I push the power button to turn it on, the ESC light comes on along with the caution triangle light for about 3 seconds then both go off and the "ready" light comes on. is this a normal occurrence?

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Prius (2004-09) :: All Lights Come On Except For Ready Light / Car Won't Start

I recently changed out my 2006 blown gas engine with a great running 2008 engine and also replaced the hybrid battery. After connecting everything, my car won't start. All the lights come on except for the ready light. Does something have to be reset?

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Prius (2010-12) :: Ready Light Doesn't Always Come On When Power Button Pressed

This started about 2 months ago. About 10% of the time when I depress the brake and press the Power button, all the dash lights come on except the Ready light (it acts as if I pressed the Power button twice without my foot on the brake). When I depress the brake a second time and press Power button again, the Ready light will still NOT come on. I have to press Power button with foot off the brake to shut off the dash lights (the car is effectively off) and then when I press Power button with foot on brake a second time, the Ready light will come on. I effectively have to try to start the car twice. I also noticed that the interior lights are dimmer when I open the driver's door until it goes through it's normal noisy gyration (something to do with the brakes?). I'm thinking that the 12-volt battery is starting to fail. Does my Gen III 2010 Prius have a diagnostic tool to check the battery?

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Toyota - Prius :: 2010 - Dashboard Lights Up But Ready Light Doesn't Come On

Since I purchased my 2010 Prius new, it often won't start. As instructed, I press the brake, push the power button for a few seconds, and hope that the ready light will come on. Typically, the dashboard lights up but the ready light doesn't come on. It can take ten minutes or more to get the car started. This happens when the car is cold, or has been sitting for a while, or randomly at other times. The Toyota service department will only address the problem if they can replicate it. I've left it at the service department for a couple of days until they experienced the problem. They reset a computer component which worked for three months. Now the issue is happening again and I'm back to trying to convince Toyota that it's a problem.

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Prius (Gen 2) :: 2005 - Ready Light Does Not Go On And Start Button Becomes Orange

I have a 2005 prius with 38,160 miles I started it and shut it off and then tried restarting and now does not want to start. The ready light does not go on and the start button becomes orange.

I checked my 12 volt and it gave a reading of 12.2 volts. These are the engine codes that come up:

U0111 comes up twice
C0200
C1259
C1310

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Prius (2004-09) :: 2006 - Ready Light Not Coming On And No Start

I have a 2006 Prius that is giving me fits. The car is equipped with the smart key but it seems to be working normally. I insert the key, press the brake, and then press the power button like I am supposed to but the "ready" light doesn't come on and the car won't start. I checked the brake light switch and it is working correctly. 12v battery is charged and shows 12.35 volts. I have been tinkering with the car for the past three days and have only gotten the light to come on and the car to start twice out of the numerous tries.

The last time it started the dreaded "triangle" and check engine light were on so I plugged my scanner in and got code P0A1F, I had a spare battery ECU so I replaced it, while I was at it I removed the battery and cleaned the terminals, there was only a very small amount of light corrosion on a couple of cells. All cells tested good and had uniform voltage. I haven't gotten the car to start since putting everything back together. I have a small amount of experience with these cars but I've got alot to learn.

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Prius (2010-12) :: Reverse Polarity Jump Start - Power Button Blinks Orange Never Goes Green

THE PROBLEM: Our Prius 12V aux battery died after my wife left the light on inside the car and instead of buying a new battery, we decided to try jump starting it. My wife tried jump starting our Prius with the neighbors pickup truck and even though I wasn't physically there to witness it, I'm pretty sure that the polarity got swapped during the process. It wouldn't start afterwards, so we went out and bought a brand new 12V aux battery. The prius still will not start. No electric components seem to work (door locks, back brake lights, windows, radio don't work). The dash only shows the orange exclamation mark and the check engine light, nothing else. The power button blinks orange, never goes green.

TROUBLESHOOTING that I've tried:

1. Checked the big 120A fuse right on the positive + terminal. Visibly looked good.
2. Checked all the fuses by the drivers left knee. All tested good with resistance + visible checks.
3. Checked all the fuses in the fusebox under the hood. All tested good EXCEPT the big relay integration fuse under the white plastic cover. It was definitely blown.
4. Replaced the relay integration, still no luck, same exact symptoms.
5. Tried force starting the car in emergency mode by holding the brake and power button down for 15+ secs. The engine starts, but the dash is still dead showing just the check engine light and orange exclamation mark. Can not shift gears or drive.
6. Tried slow charging the NEW battery to get the voltage higher, still no luck. It's testing about 13V with everything off.

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Prius (2001-03) :: Won't Start / Multi Function Goes Off / Ready Light Doesn't Come On?

Multi function goes off and ready light doesn't come on when turn key to start.

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Prius (2010-12) :: Current Draw While Parked And In Ready?

So I use my car as a "work truck" and part of my duties involves stopping at a number of houses(8-12) for 5-15 min at a time and then driving 2-6 miles to the next house.

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Prius (2010-12) :: MG2 Rumble / Vibration When In Ready Mode With ICE Off

I am still getting used to my new Prius, just have a little over 700 miles on it. I recently noticed something very strange with the car - if I am in "Ready" with ICE off, and I put it in drive and release the brakes, but do not press the accelerator, the car will slowly move forward, just like a regular auto transmission. After about 1 second the speed will reach about 2 mph and I can feel a very small rumble in the cabin and a very light vibration on the steering wheel. It sounds like a very low frequency bass, and it lasts for less than a second.

It goes away and the car continues to accelerate up to about 5mph (the accelerator is still not pressed). This sound is almost unnoticeable, and it does not happen if I release the brake and immediately press the accelerator, it only happens while creeping forward very slowly. I was able to make this sound/vibration last longer by "riding" the breaks and keeping the speed around 1-2 mph, it is very faint and I have really listen to it. To me I believe it is caused by some resonance/harmonics in MG2 turning at extremely low RPM, at least it "feels" somewhat "electric"...

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Nissan - Altima :: 2007 Won't Start / No Ready Light

It ran out of gas with the previous owner and they say the steering is new and the hybrid battery is new and the 12 volt is new but when I got it I had to get the 12volt battery trickle charge which it charge to 80 percent and it still didn't start only goings from lock, acc, then on never say ready no sound but when I pull the IGCT relay the fans come on but it don't start what is this relay?is this car just like Toyota primis. What could be the problem of this mechanism to get it running I have the only one in my town which no one knows how to work on It.

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Prius (Gen 3) :: Ready Sign Stays On, Car Won't Start

This is probably the 4th time this has happened, but when I first get into the car this morning, and try to start it (firmly pressed breaks down, waited a second, and pressed the start button), all of the Prius electronics would fire up but the Ready sign would not turn on. Also, with the foot still on the brake, the LED light on the power button is green. When I take the foot off of the brake it's red/orange. With my foot on the brake, I tried to press the start button again but nothing. So I took foot off the brake, hit the start button to turn off the vehicle. Went through this about 2 more times before the car finally started with the Ready sign lit up.

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Prius (2010-12) :: Green Car Symbol In 5 Minutes Consumption Intervals

Green car symbol in 5 minute consumption intervals, no longer appears since I changed my 12v battery. What did I do?

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Prius (Gen 3) :: Ready Light On - Car Will Not Shift Into D / Just Stay In Park

2nd time I've had this problem. With the car turned on "ready light" on, the car will not shift into D. It just stays in park, and yes my foot is on the brake. I've tried to reset by turning the car off, turning it on again and shifting into D, still no luck. By retrying this over and over it finally goes into Drive and away I go. I've had the car for 3months and 5k miles, and this has only happened twice.

The second time occurred when I was stopped by a flagman at a road construction site. Instead of shutting down, I just pushed the park button. The lights were on, the radio playing and my garmin was plugged in and the AC was on, would the high load have caused the problem? When I pulled the plug on the Garmin, the car went into gear on the next try, but I don't know if there is a cause and effect. I finally got it going after about 25 cars had to go around me and the last car was passing me when it finally went into D.

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