I have had a battery go dead in my 2004 Sienna twice after it was not used for 3 to 4 days. I know nothing was left on, because the console light control switch was set to off, making sure a door not being completely closed would not turn on any lights. In talking to my dealer, he said the parasitic current (current drain on battery with everything turned off), should be between 25 and 60ma. I checked mine, and found it was 220ma. I then checked my daughters 2004 Sienna and found the same thing. It seems unlikely a 220ma parasitic drain on the battery could discharge it in 4 days. The battery is rated at 575CCA and an RC of 130. I think it is the battery itself. It is three years old. Has anyone measured the parasitic current in their Sienna? If so, I would be interested in what they got for a reading. When I did the test, I connected an ammeter in series with the positive battery cable and the positive battery post, with everything turned off and all doors closed in the van. If you try this, and do not understand what you are doing, you could damage a current meter. Do not open any doors or turn anything on while doing this test. Charles Ranheim.
- posted
17 years ago