Originally Posted by LexusLadi
So I called the dealer today and they said that the car needs to be reset or "cycled" as they put it. As the people who installed the new 12V battery (tire store) didn't have the proper tools to do it.
They said that they would also check the traction battery while I wait.
Otherwise he said it should be fine.
I'll keep you posted.
There are several settings which are lost when the 12V battery is disconnected.
Some are rather obvious, like the loss of memorized stations on the radio or the seats/steering wheel/mirrors position.
Some others are less intuitive, like the automatic function of door windows switches, but the manual describes how to fix them. Or the coloured lines shown in the rear camera, but they re-adjust themselves upon steering each side.
The only thing which I don't think is described in the manual, and in theory must be done by the dealer, is the ISC reset. But a DIY is actually feasible also for that, you can find the procedure somewhere in this forum. And it doesn't actually make a significant difference to the car behaviour, anyway.
I'm mentioning this because I also have a 2008 MY, which I often leave unused for several weeks, and in these cases I always detach the 12V battery - as a result, I'm still on the Sep '08 original battery...!
But after re-attaching the 12V battery, in many cases when I was in a hurry I didn't bother to fix all this stuff immediately: just turned the key, and off I went. Never had any problems with that, aside obviously from not having the auto switch for windows etc.
So, I'm wondering what else could your dealer mean by "cycle" the car....
Also, I'd be interested to hear more about the checks (and their results) on traction batteries.
Thanks in advance for keeping us posted!