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Car was fine Saturday night and then 24 hours later its totally dead. Pushing start button does nothing. I tried using jumper cables to get it going but no success. Any idea what happened? It's locked in park so getting it out of the driveway for towing to dealer is going to be very difficult.
 

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What year Tom? And how long have you had the car? You are posting a "classic" and common complaint of the small 12 volt battery in the trunk being completely "flat." Really work on that battery jump. I've read many posts here that the system described in the owners manual is not sucessful I would guess 15% of the time. So, can you get to the battery in the trunk and directly jump it there. Not one other switch, button or any thing electrical will work when that small battery is "ka-poot."
If the cars, say three years old and you have access to the trunk I would suggest just slipping a new battery in and then looking for the "switch" you left on that killed the electrics. Whatever you do, it will relate to that battery and I'm sure car will not have to be towed to a dealer.
Don't feel too stupid if you find you left a light switch on or a door cracked open. A lot of people have and the fact that Toyota left those small 12 volts in the car since "day one" hasn't helped. A standard battery in that cavernous compt. would have corrected most all this type of a problem by retaining power a couple days with the dome lights on and the replacement costs of a new battery would be "dirt cheap."
Just another, "I wonder why?"
 

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PRIUS YEAR

It's a 2005 which has been trouble free for 2 years. Thanks for the advice. Will try getting to the battery now,.
 

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GOT IT RUNNING. THANKS

I was finally able to get the jumper thing to work via the engine compartment.

I could not get the back hatch open because it was not fully closed. That was the root cause of the problem... batter drained due to hatch light burning for about 36 hours. After I got it going I was able to open the hatch.



Thanks,.
 

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I think there's a hatch release inside the car. Emergency thingy - not a "wouldn't that be convenient" thingy. Somewhere in back. Could use that, if you ever have to, to get the hatch open to reach the battery.

Good for you for diagnosing the problem, and fixing it! :) Well done!
 

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When you were having problems did you loose the auto driver window up stop function. That nails the dead battery thing. It is sadly a small battery and can be abused. I wonder if there should be a routine change interval for the battery.
 

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An easy way to tell if your battery is dead: can you operate your personal/map lights located in the console? How about the dome light set to ON rather than DOOR? If lights don't work, battery dead or main/dome fuse blown. These lights don't require any power mode or electronics to operate this way.

It can be tricky to get a good solid electrical contact in jumping from under the hood. One common mistake is trying to connect to the screw post rather than the metal tab. 2nd common problem is getting a good ground. I often have difficulty with the latter in any car.
 

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And of course the easiest that Tomrdillon found. Absolutely "nothing" worked!
The question remains. We have seen this sort of writeup at least twice a month since the Prius went into production and simply because that "baby" battery will not handle any type of depletion as with the dome lights over night.
The compartment in the rear is "huge" and a standard sized 12 volt battery which would operate the dome lights for several days would fit easily, and would be much less expensive when replacement was due.
I just don't get these guys. When seats are a major complaint, batteries are undersized, driving positions are uncomfortable, most manufacturers correct the difficiencies in nest years model. Not add a TV camera in the rear! (I know, all this battery is expected to do is turn on the computer. Then why not go for a couple of "D's")
I sort of expect that each new years models will be improved over last and not just have a couple of new exotic electrics added.
I'de be very interested in looking at an 07 Prius if I heard it had comfortable seats, a new battery and a telescoptic steering wheel.
Something new in the "blue-tooth" vein just won't "cut it."
I wonder if anyone in local dealer sales has any feedback at all with Toyota? Rickey could probably give them a lot of usefull info.
I get the idea that Toyota believes their original engineering is "infallible"
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The reason for the specialized battery is location, not just size. Because it is in the cabin area, it needs to be sealed to prevent corrosive acid spill that can ruin your hatch body floor, and vented to prevent a possible rare occurance of explosive hydrogen gas accumulation in the cabin.
 

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richard schumacher said:
Always lock the doors, no matter where you park. It's more secure, and if anything is ajar the car will beep at you. Problem prevented.
Beeping Prius are only if you have the Smart Entry & Smart Start option.

If you remote lock your doors (either by the fob or by the Smart black buton, but NOT the inside the door button), the Prius will not lock (flash lights, beep if you have Smart) if a door is open.
 

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The reason for the specialized battery is location, not just size. Because it is in the cabin area, it needs to be sealed to prevent corrosive acid spill that can ruin your hatch body floor, and vented to prevent a possible rare occurance of explosive hydrogen gas accumulation in the cabin.
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.I have a full-size factory installed vented 12 volt Delco Battery installed in my 87 Cadillac in a compartment directly behind the passenger seat. 90% of the old VW bugs had the full sized installed under the back seat. I thought it was size limiting that caused the installation of the motorcycle battery in the Prius until I opened the compt up and found plenty of room for a couple of full-sized vented batteries with out sacrificing anything.
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You can kill a full size battery by leaving something on overnight. On my plymouth mini van the warning light that the tailgate wasn't properly latched woutl do it over the weekend. The best solution is to be careful to keep everything properly closed and turned off. I also keep a battery charger in the garage.
 

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As an addem. ... Checked out and drove a new Camry hybrid today. Loved it and as a note here, located in a battery compartment in the trunk at floor level just aft of the rear right wheel well is a full-sized 12 volt battery and on the cars inst. panel to the right of the speedo and tachometer is an ammeter for the 12 volt. On the left side of the panel is a coolant temperature guage.
Power electric seats and a tilt and telescoptic steering wheel.
(standard fuel guage. No "blinkos")
 

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Btw, what does it cost to replace that baby [battery]?

PA P
 
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