Question about 2008 Toyota Avalon

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1998 Avalon XLS battery drain

Same thing is happening to us. The battery keeps going deas after about 48 hours and it's a new battery. The charging system checks fine as well as the limited drain on battery when car is off.

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  • rgcary Sep 04, 2009

    Legal-racer: It's at the dealership again. The first time around the battery would not hold a good charge after about 15 months, they replaced it and said that the system was charging correctly. Second time around that new Toyota 60 month battery went dead recently in about 1 month or less. We brought it back they tested the charging system, it's working and tested the drain on the battery when the car is off and that passed w/in normal limits. So, it has everyone scratching their heads. The car was driven this week 2x and it died last night w/only about 2.084v reading on the battery from the posts or clamps. No lights, including trunk are on. If the parasitic test is passing then what in the world can it be?

  • rgcary Sep 04, 2009

    No it does not shut off mid drive. If it sits for about 2 days, then the battery can go deadabd you can jump it, then the alt charges it up to about 13.0-14.0v. So you know the alt is working. The dealership just put a new battery in it today after extensive testing on the charging system and low drain when car is off. Everything passed, but they still put a new battery in. So if the batter goes bad again we have a very odd issue and we'll probably buy a new car for my wife. We can't have this happening w/a newborn in the family.

  • Jamie May 11, 2010

    Did you run a test on you're Alternator? When you turn the car back on that is suppose to Re juice you're battery, Or maybe something isn't turning off? Check all you're power sources while the car is off and see what still gets power, Uhmmm.... A volt tester :P On you're relays and fuses, Thoses are just some ideals. You kinda have to know what gets power and what doesn't... Good luck,


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Does The car shut off mid drive? Could be a Wiring harness problem,
I think it's you're alternator though, That would be a good reason you're battery is dieing,

How do you get the car started again?

Posted on Sep 04, 2009

  • Jamie Sep 05, 2009

    Well Very odd indeed. :() I hope that it was just the battery and I wish you the Best of luck


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