Prius (2010-12) :: Green Ready Button Would Not Light Up - Low 12v Battery?
Jul 21, 2014
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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I have a 2010 Prius that I bought in January. No problems until this morning. Here is the situation...
I get in my car, step on the brake, mash the start button and nothing. The green ready light does not come on, no key detected does not come on, nothing. However, if I take my FOB, and place it by the start button, the ready light will come on and it will start.
I thought it could be a battery issue but, this happens with both FOBs...
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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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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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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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I kept my car more than 6 days in my garage and today I tried to start my car but, unfortunately smart key did not work. once i kept my hand under the door handle i can here a small click noise but it is not the usual noise and the turn light even did not flash, still the door is locked so i tired to unlock with the mechanical key. Then I enter to the car and i press the break paddle I heard a long motor noise as usual but this is bit longer noise. then i saw my smart key appears on the dash board but the car did not start up . again i tried to on the car I here a knocking noise and the green light on the power button blinks. I tried several times no luck. what will be the problem will it be 12v battery?
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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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I have 2004 Toyota Prius 110k miles on it. New auxilary battery on it. VSC, Brake and Red triangle lights are on. The car wont start. System comes on, but ready light doesn't not appear.
If I discoonect the battery for a minute and connect it back, I am able to start and drive it. After a minute VSC, brake light comes on. I still can drive the car and it drives perfect. As soon as I shut it off, I won't be able to restart it again. I have to disconnect the battery for a minute to get it started. Inverter pump seems to be working fine.
I got the codes with the paper clip VSC 43, Brake 36. After resetting the codes, I drove the car and now it throws VSC 51 code.
Check engine light is not on. When I checked with OBD scanner, it does not show any codes. When we checked with shop's scanner, there was a code smth "LOST COMMUNICATION WITH HYBRID..."
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2007 Prius
I just replaced the 12V battery with an Optimus yellow top. The car still will not start. All dash lights come on, READY light does not. Car will only shift into Park and Neutral.
Battery reads 12.6 volts when not hooked up and 12.3 when cables attached to terminals.
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We just replaced the Traction battery in my 2004 prius. The car has 242,000 miles on it and was running fine when we pulled it in. The battery was purchased used from a 2005 prius with just over 80k on the clock. The replacement battery was removed from the wrecked prius less than a month ago.
The problem is that after installing the new traction battery, every thing looks great except the Ready light will not come on. There are no warning lights except the little red light that indicates there is no key in the car. The key will remotely lock and unlock the car so I'm sure the battery is not dead and the no-key light stays on even if I insert the key into the key slot on the dash. The shifter will only move from Park to Neutral.
What am I doing wrong? Is there some special procedure to go through to make the car recognize the key after replacing the battery?
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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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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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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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2011 Prius with 30,000
At the first start of day when I pressed on brake pedal and got the green light on power button as usual I pressed power button and never got ready condition, trying to figure out what is happening I have had this condition occur almost every morning (outside air temp around 40 degrees F) also when I went to train station to pick up my daughter I shut off for about ten minutes and it happened again.
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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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Went down to the garage at work to get my car and the keyfob unlock button did nothing on the treg. The green light on the button flashed, but no matter how close I was and no matter how many times I pressed the button, nothing happened.
When I opened the door with the key, the alarm went off but starting the car fixed that (I really don't know what buttons on the remote to press to stop the alarm--I've hit panic by accident in my pocket a few times and only after furiously pushing all sorts of buttons on my keyfob has the alarm deactivated... I'm never sure which one did it).
When I got home the first two times I tried to lock the treg nothing happened. Then it locked. Now it seems to work 100%. I had the range fix and my range is quite good.
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I tried to turn on my car this morning, but the "Ready" sign didn't go on. The whole display is black. "Check Engine" sign blinked briefly. Battery display shows the battery is "green". Everything else works - cd/radio/bluetooth, etc. As I tried to start it, the screen showed that the engine briefly charged the Prius battery, then it was all quite. I tried to wait and restart a few times, but still the display was all black and no "ready" sign. I WAS able to still move the car, but I didn't chance to drive it out of the garage. I just had it serviced (oil/fluid change). Small battery was replaced in July.
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About to hit 130,000 in 20 miles. For the past 10-15k miles, I have been consistently getting under 40 MPG, about 36/37. Only can I get 40+ for a whole tank when I do mostly highway driving. Before, my tanks would average 42-48 mpg.
My battery is also doing some funky things, sometimes when I turn the car on for the first time on a new day, my battery will go from green or blue (the blue right before it hits green) and will literally drop to one or two slivers of red in 15 seconds. I took it in when it first started doing that and they did a software flash or update, something along those lines.
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So our car has performed flawlessly since 2005/135K miles. Still getting 55 mpg in the display in the summer, 45 mpg in the winter. Only issue is traction battery SOC quickly goes to full green when coasting downhill, and 1 or 2 purple bars when climbing. In Colorado, this happens a lot. Within a mile or so coasting downhill the SOC is full green. Question is: should I replace the traction battery? Is there any harm to continuing to experience this behavior? When full green, I realize I am using friction braking over regen braking, have actually felt the crossover from regen to the pads, as the SOC goes full green.
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I have noticed that my 2008 Prius does not always engage EV mode (after I push the EV button) when the battery is green (nearly fully charged) and speed is well below 45 km/hr. Message displayed is "switching to EV mode is invalid now". So it seems there are factors at play other than the speed and the level of traction battery charge.
What these are? Is battery temperature monitored? Will the operation of the air conditioner affect it? Most times it doesn't but I wonder if under certain circumstances it might.
I use it at times if I am going up a slow speed incline, often from a standing start, knowing that there will be plenty of opportunity to recharge shortly after.
Weather here is pretty warm- around 30C maximum during the day.
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When battery is low (purple bars IN DISPLAY) EV mode is not allowed, obviously; but WHY is it not allowed when the battery is full or nearly full (green bars on display) ?
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