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You will lose the memory settings (more) (archive)

[ Follow Ups ] [ 3-series (E46) Message Board ] [ Msg. Board FAQ ]

Posted by gercar on September 25, 1999 at 18:11:52:

In Reply to: Re: One more time... posted by nobody on September 25, 1999 at 18:03:06:

: Not sure if this will work but somebody on tv mentioned that feeding a 9V battery to the lighter outlet will preserve the computer settings.

: : I tried getting an answer to no avail.

: : I'm putting in a V1, hot wiring it to the ignition,
: : an oil pressure/temperature guage, and a voltge meter. I like to unhook the leads to the battery before I perform these task.

: : Will I lose all the remote key memories as well as
: : the OBD memory if I cut the juice from the battery?

: : Thanks
: : Henry

You'll lose things like radio presets and seat memory, however it won't effect OBD II or ECU's. These are designed with hard chips, just like a home computer if the power goes you lose all installed software but the basic stuff still remians. Simply, you'll have to reprogram all those gadgets again, but the car will run just fine after a few minutes (the EMC needs to reset).

As far as OBD II memory it will erase, but if something is still wrong with the car it will register it once the battery is reattached. Note: OBD II is a monitoring system not a recording system (unless you own a GM product). Simply once the problem is fixed OBD II no longer "cares".


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