Hybrid 12v battery jumping - Page 5 - Toyota Nation Forum : Toyota Car and Truck Forums
Camry Hybrid Discussion area for the Toyota Camry Hybrid. Topics of discussion range from fuel economy, safety, modifications, performance all involving Americas favorite family car, the Toyota Camry.

 
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post #61 of 240 Old 09-04-2012, 07:08 PM
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Originally Posted by WhiteSands View Post
At night you can ease the trunk lid down and see if the trunk light goes out.......
No need to do that . Just open the trunk-pass compartment pass thru and take a peek or fold a seat down.

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post #62 of 240 Old 09-04-2012, 07:10 PM
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I have a 12V compressor that start blowing my 15A power outlet fuse (on another car), so I just bought an adapter that clips to the battery and has a cigarette lighter adapter on the other end - now I hook the 12V compressor directly to the batter via adapter.

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post #63 of 240 Old 09-04-2012, 08:14 PM
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Originally Posted by WhiteSands View Post
I run 44 psi cold in my 93V Primacy tires. This is the first set I have bought that shows 51 psi max pressure on the sidewall. I could really tell a difference in steering and coasting when I upped them to 44 psi including a slight increase in mpg. They ride ok, but can get a little noisy on rough streets and when crossing rail road tracks.
44 psi is a little bit too high for me. I'd be concerned about hydroplaning in rainy weather.
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post #64 of 240 Old 09-04-2012, 10:06 PM
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Originally Posted by AQ-OC View Post
I fear that may be just too much for roads here in SC...I'm going to try 40 psi cold and then probably work down from there.
Be sure to notice how much better the car steers especially at highway speeds. The car should coast much easier, try a neutral cost for a short ways. 40 psi cold definitely increased my mpg some over the 36 psi cold put in by the dealer.

It's the tread design that helps prevent hydroplaning. Even at 40 your 11 psi under the tires 51 max pressure. Still 44 sounds a little excessive. Here were I live in the southern NM desert it seldom rains, so i'm ok with the 44 trying to squeeze top mpg from my '12 TCH.

Last edited by WhiteSands; 09-04-2012 at 10:15 PM.
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post #65 of 240 Old 11-28-2012, 12:49 PM
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TCH storage

Has anyone stumbled on any information on long term storage of the TCH. By long term, I mean 4 months or so. I know when the Prius first came out, this was a serious issue, but I am assuming this has been ironed out.

I asked our selling dealer and they said they did not think it was an issue. I couldn't find anything in the manual, and searched this forum and came up empty.

We purchased our TCH about 2 months ago and in the summer months we go to Colorado and normally leave our car here, garaged, in Texas. Any experience, links, or information would be much appreciated.

This is my first post on here and I love this car!!! I go wayyyyyy back with Toyota and this is the finest one, yet! How far back?? 1966.
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post #66 of 240 Old 11-28-2012, 01:53 PM
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About the only thing would be to disconnect the 12v battery or put a good quality trickle charger on it. The 12v has a rather small capacity and would probably be depleted over the 4 month period.
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post #67 of 240 Old 11-28-2012, 04:52 PM
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I found this in the Hybrid Systems section of the owners manual:

"As the gasoline engine charges the hybrid battery (traction battery), the
battery does not need to be charged from an outside source. However, if
the vehicle is left parked for a long time the hybrid battery will slowly discharge.
For this reason, be sure to drive the vehicle at least once every
few months for at least 30 minutes or 10 miles (16 km). If the hybrid battery
becomes fully discharged and you are unable to jump-start the vehicle
with the 12-volt battery, contact your Toyota dealer."

This is the best bet, as there is no good way to charge the 245 volt hybrid battery. On the 12 volt, apparently one of the main draws on the battery is the Smart Key system. Check through the manual. I recall reading that there is a way to disable the smart key system so it does not consume power.

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post #68 of 240 Old 11-28-2012, 05:04 PM
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Over a 4 month period, there should be no problem with the traction battery. A suggestion is to make sure the HV battery has a full, or nearly full charge prior to storage. The weak link is still the 12v battery. On the Gen II Prius, there was a button under the steering wheel to turn off the SKS. However, with the Gen III Prius this button was eliminated and the SKS will turn itself off after a period of inactivity (can't remember the length of time). I don't know if the TCH has that same 'power-down' feature.
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post #69 of 240 Old 11-28-2012, 07:30 PM
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Quote:
Originally Posted by Ron AKA View Post
I found this in the Hybrid Systems section of the owners manual:

"As the gasoline engine charges the hybrid battery (traction battery), the
battery does not need to be charged from an outside source. However, if
the vehicle is left parked for a long time the hybrid battery will slowly discharge.
For this reason, be sure to drive the vehicle at least once every
few months for at least 30 minutes or 10 miles (16 km). If the hybrid battery
becomes fully discharged and you are unable to jump-start the vehicle
with the 12-volt battery, contact your Toyota dealer."

This is the best bet, as there is no good way to charge the 245 volt hybrid battery. On the 12 volt, apparently one of the main draws on the battery is the Smart Key system. Check through the manual. I recall reading that there is a way to disable the smart key system so it does not consume power.
What a dumb thing for Toyota to say, "every few months". How many days is that? The FFH gives an exact number.

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Last edited by TAH Owner; 11-28-2012 at 07:39 PM.
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post #70 of 240 Old 11-28-2012, 10:06 PM
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Good question

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Originally Posted by camry hybrid driver View Post
What a dumb thing for Toyota to say, "every few months". How many days is that? The FFH gives an exact number.
I agree...what is a "few." I looked it up in the dictionary and found that few=not many.

I may forward my question to Toyota.com and see if anyone is awake there. I have to confess that I was in the "business" for a while and know all too well, the misinformation and lack of information within the "system." So, I don't necessarily trust what the Company might say.

I appreciate the feedback and will keep checking this out.
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post #71 of 240 Old 11-30-2012, 05:11 PM
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Reply from Toyota

Following is the reply I received from Toyota:

Thank you for contacting Toyota Motor Sales, U.S.A., Inc. We appreciate the opportunity to address your inquiry regarding storing your 2012 Camry Hybrid.

In addition to the "storage tips" for our conventionally-powered vehicles, our hybrids require additional steps for each battery, as the hybrid vehicle battery and auxiliary battery will discharge and their condition is liable to decline.

To prevent excessive auxiliary battery drainage, charge the battery at least once every two weeks by powering on the hybrid system for 20 minutes with all non-essential electrical accessories (such as air conditioning and audio equipment) turned off. It is not necessary to drive the vehicle, but do not start the hybrid system in an enclosed area unless the tail pipe is connected to an exhaust hose to prevent harmful buildup of fumes. As an alternative, you may disconnect the negative terminal of the auxiliary battery.

For the hybrid vehicle battery, charge the battery at least once every two months by starting the hybrid system for about 30 minutes*. Check that the "ready" light is on and all lights and electrical accessories are off. As with the auxiliary battery charging, it is not necessary to drive the vehicle, but the steps to prevent exhaust buildup must be taken.

*If the auxiliary battery was disconnected, it will have to be reconnected before the hybrid system is started.

We hope you find this information to be helpful. If we can be of further assistance, please feel free to contact us at http://www.toyota.com/help/contactus.html.

Sincerely,

Kym Strong
Toyota Customer Experience
"
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post #72 of 240 Old 11-30-2012, 05:28 PM
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I think that is a very conservative approach by Toyota. If the Prius HV battery can go 6 months or more, I see no reason that the TCH should be any different. A good quality trickle charger on the 12v should take care of the 12v battery. Or, just disconnect the 12v battery and charge it (if necessary) before reconnecting it.
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post #73 of 240 Old 11-30-2012, 07:07 PM
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Quote:
Originally Posted by firepa63 View Post
I think that is a very conservative approach by Toyota. If the Prius HV battery can go 6 months or more, I see no reason that the TCH should be any different. A good quality trickle charger on the 12v should take care of the 12v battery. Or, just disconnect the 12v battery and charge it (if necessary) before reconnecting it.
I agree that it is probably very conservative and I understand the Company is not going to push the envelope very far. I think the most sensible thing for us will be to get someone to "exercise" the car weekly, if we can get that worked out. I am sure there would be no shortage of volunteers if I put it in the paper. But, if that doesn't work out, I think the trickle charger route might be ok.

Thanks, again, for the feedback and I am interested in any experiences.
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post #74 of 240 Old 12-01-2012, 12:13 AM
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Originally Posted by lwking01 View Post
Thanks, again, for the feedback and I am interested in any experiences.
I found a thread I started a few months ago. It gives some battery voltages at various times for the 12 volt. In particular see the first and last post. I found the 12 volt battery lost about 10% charge after sitting 2 weeks. If it continued at this rate it would be getting down to minimum usable charge after about 4 months. Not sure if the 245 volt battery would discharge about the same rate or not. I would try to get it as fully charged as you can before putting it into storage.

I think starting it every two months and letting it run to charge up would be quite safe. Four months may be pushing it. Just my guess...

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post #75 of 240 Old 12-01-2012, 08:37 AM
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The 12v will drop at a much faster rate than the HV battery because it has some load on it. However, with the car off, there should be no load on the HV battery. Thus it should be fine for 4 months of storage.
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