Disconnecting 06 Rx400h Battery

[atebit]

I've found serveral places in the owners manual about steps that have to be taken if the 12V battery is disconnectd/reconnected. The automatic rear door, the power windows and the moonroof all may need to be initialized. But then I found another section in the manual that says the "idle speed" may also need to be initialzied after a 12V battery disconnection.

TSIB EG010-05 describes the process a tech can perform to complete the initialization. I guess my question is...how "likely" is it that I'm going to have to do this if I disconnect the battery? Clearly, this is something that I'm not going to be able to do myself, since it requires some sort of diagnostic test set to get into the necessary modes.

My other question is if anyone knows any other potential pitfalls to disconnecting the battery that I've missed? The last thing I want to do is turn my RX into so much immobile junk just by disconnecting the battery.

[RX400h]

I find it extremely hard to believe that disconnecting the 12V battery would result in having to do all this work. Are you sure they are not talking about disconnecting the NiMH batteries? If I disconnect the battery in my Corvette, all presets (such as radio, seat memory, light settings, etc) are retained.

[katzjamr]

if you dont re intitialize the idle speed after battery disconnection your mileage may suffer

[atebit]

I find it extremely hard to believe that disconnecting the 12V battery would result in having to do all this work. Are you sure they are not talking about disconnecting the NiMH batteries? If I disconnect the battery in my Corvette, all presets (such as radio, seat memory, light settings, etc) are retained.

RX400h, please take a look at page 10 in the 2006 Owners Manual. The "Auxillary Battery" the manual refers to is the 12V battery. The only reason I can think that Lexus would come up with a service bulletin for this is that at least a couple of owners must have actually encountered this problem.

Luckily, I was able to have my head unit replaced without disconnecting the battery, so I can't say it's happened to me, though!