Last post on Feb 11, 2013 at 3:59 PM
You are in the Toyota Sienna
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Toyota Sienna, Electrical, Lights, Van
#98 of 102 Re: 2011 Sienna Battery being drained [northbrook4]
Jan 28, 2013 (5:49 pm)
Depending on the exact conditions of those cold starts and that short 3.5 mile drive, you may indeed be guilty of taking out more than you are putting in.
A cold start load could pull up to 400 amps. Accepted, it's a brief duration at that draw rate, but it's from a chemical conversion and not an unlimited current source.
While your alternator may be rated at a lofty 130-150 amps, that assumes the engine is spinning at 2k RPM or so. If it is a low speed drive with some stop & go, and you have lights and fans running, you might not be putting much back into the battery at all. Plus, given that you have to put back something like 2-3X or more to equal what you took out (energy conversion efficiency), you might be running in depletion mode all the time.
Experiment. Drive a few extra miles each night before coming home. Some high speed driving would be a plus. Do this for a week and see if things are any better.
#99 of 102 Re: 2011 Sienna Battery being drained [northbrook4]
Jan 29, 2013 (11:48 am)
Have you checked the water level in the battery...if necessary add distilled water, NOT tap or bottled water. Just a thought.
#100 of 102 electrical issues and malfunction
Feb 04, 2013 (8:15 pm)
I came across this forum when I was doing a search on issues that I am having with my vehicle. I have a 2006 Sienna with automatic sliding doors. I have been having battery draining issues and dome lights that are on even when the switch at the front is set to OFF. I actually leave that switch to off permanently because I've been through 2 batteries in 2 years due to the battery draining when I didn't realize the dome lights and the running lights were staying on. I pulled the lightbulb out of the running lights so it wouldn't be on all the time.
In November of last year, the sliding doors malfunctioned and injured by 8 year old. The retraction system was not working and it hit her waist/hip, her shoulder, and then hit her face, ending up with a gash above her eye, needing stitches. (I created a blog about it here: http://toyotamalfunction.blogspot.com)
I didn't think that the electrical issues could have been related to the malfunction on the retraction system. Something to consider.
#101 of 102 Re: electrical issues and malfunction [jhoge]
Feb 04, 2013 (8:19 pm)
...and after reading all of the posts here, I went to check the radio. The radio works fine, but the DVD player button won't work. It won't switch to DVD from the radio.
#102 of 102 Re: 2011 Sienna Battery being drained [northbrook4]
Feb 11, 2013 (3:59 pm)
northbrook4 you still here?
My son's van, like your, checked-out "OK" with the dealer AGAIN, but we didn't get any specifics as usual. He's asked for a "file" to be opened with Toyota (a specific process for unresolvable complaints/problems) wherein eventually Toyota will assign some sort of "master mechanic" who will come in, examine every test the dealer's done and dig further into the matter to get it corrected. In the meantime, son and I will be doing our own disagnostics with my new multimeter. We'll keep you posted.