Hybrid 12v battery jumping - Page 7 - Toyota Nation Forum : Toyota Car and Truck Forums
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post #91 of 240 Old 01-27-2013, 08:00 PM
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Originally Posted by restamp View Post
Perhaps the most demanding thing on startup is the accumulator pump -- does anyone know if it is driven off the 12V battery or the traction battery?)
I think the only accessory motor that runs off the HV battery is the A/C drive motor. The brake hydraulic fluid pump starts when you open the door and I believe at that point the 245 volt battery is not connected, so it must be 12 volt.

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post #92 of 240 Old 07-18-2013, 12:37 PM
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Not Driving TCH Every Third Week

Starting in the fall, my travel will increase dramatically, with my TCH (2012 XLE) going up to 8 days without being driven, and spending one week out of every three idle in my garage.

How will this impact starting/battery when I return?

Also, does it matter how high the traction battery is charged when I leave the car for a week?


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post #93 of 240 Old 07-18-2013, 03:27 PM
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It shouldn't be a problem. Just make sure the interior and exterior lights are off, and don't leave a fob in or near the car.
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post #94 of 240 Old 07-18-2013, 03:41 PM
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I would drive it enough to see the traction battery is at least charge to 50% or higher before parking it for the 8 days. I would also make sure the clock is dark, or no digits to insure it's powered off.
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post #95 of 240 Old 07-18-2013, 04:28 PM
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Originally Posted by WhiteSands View Post
I would drive it enough to see the traction battery is at least charge to 50% or higher before parking it for the 8 days.
That's what I was planning to do next month when my TCH will be parked for 8 days while I'm out of town. Figured better safe than sorry.
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post #96 of 240 Old 07-18-2013, 05:04 PM
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Sometimes I am in Florida for 2-3 months while my Camry will back home in the garage.........am I going to have problems?
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post #97 of 240 Old 07-18-2013, 07:21 PM
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Two data points:

1. I left my 2012 TCH parked 8 days last month while I was out of town on vacation. When I returned, the 12V battery voltage was 12.53V and the car started without incident.

2. A friend left her 2007 Prius parked 4 months. When she returned, the 12V battery was too dead to start the car, but after a recharge it started fine. No problem with the traction battery. (Prior to this, the 12V battery had started the car after 3 months of non-use.)

YMMV

Rob - 2012 Camry Hybrid XLE
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post #98 of 240 Old 07-18-2013, 07:34 PM
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Just make sure it is turned off. No need to do any more. There is a little power consumption on the 12 volt circuit, but I believe you are good for at least 3 weeks and probably more. No consumption on the high voltage side. No need to waste gas driving around trying to get it charged to a high level.

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post #99 of 240 Old 07-18-2013, 08:16 PM
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Our Camry is about to spend the next 2 1/2 months sitting in our garage while we're away. I always leave whichever car is in the garage for this amount of time connected to a battery tender and have never had a problem when we return.

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post #100 of 240 Old 07-18-2013, 08:20 PM
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I wouldn't worry about it. 8 days is nothing.

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post #101 of 240 Old 07-18-2013, 08:23 PM
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Just to sleep better, put Battery Tender on 12V battery. I'd still not leave traction battery with two or so bars.



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post #102 of 240 Old 07-18-2013, 09:10 PM
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For the time my car is less than 2 years old, would Toyota Roadside Assistance jump it for me if it did fail to start?




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post #103 of 240 Old 07-18-2013, 09:48 PM
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I would certainly hope so. I would call them first if my car wouldn't start. (That said, I'm not sure if this program encompasses problems that occur at home and not on the road. Anyone know?)

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post #104 of 240 Old 07-18-2013, 11:57 PM
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Quote:
Originally Posted by Mater99 View Post
For the time my car is less than 2 years old, would Toyota Roadside Assistance jump it for me if it did fail to start?

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That would only work if it was the 12 volt battery. The TCH uses the traction battery to start the car, and if it's drained, they will NOT be able to jump start the car. Only way to charge the traction battery would be to have the car towed to the dealer.

Maybe Toyota should turn all their Hybrids into plug-in Hybrids.
Wouldn't cost that much for a simple charging circuit that would top off the small Hybrid battery over night using a standard outlet.
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post #105 of 240 Old 07-19-2013, 11:37 AM
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Quote:
Originally Posted by nutzo View Post
That would only work if it was the 12 volt battery. The TCH uses the traction battery to start the car, and if it's drained, they will NOT be able to jump start the car. Only way to charge the traction battery would be to have the car towed to the dealer.

Maybe Toyota should turn all their Hybrids into plug-in Hybrids.
Wouldn't cost that much for a simple charging circuit that would top off the small Hybrid battery over night using a standard outlet.
I would expect roadside assistance to do the towing if that becomes necessary. Except in cases of a failed HV battery I've never heard of anyone reporting a discharged HV battery. 12V yes if left for a long time, but HV no.

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