I know you lose your radio station presets when you disconnect the battery to erase the ECU memory, but for you NAVI owners out there, do you loose any of your navigation info, ie. address book??

 

Don't know about the Nav data. You might want to try
the newest ECU reset procedure via the gas pedal movements.
I believe it has been verified that this quick 1 minute reset
works just fine. Read the thread and find out all about it.

God I love this car!

 

You don't lose any info on the nav system- it's stored in hard memory, which doesn't get flushed.
G

2003.5 Black w/ Willow
Premium / Sport / Aero / Winter / Navi / Tint
Indianapolis, IN

 

can you link me to the thread where it was determined this worked...i thought we agreed it did nothing to ecu - if so i am doing it wrong and i did everything instructed and got the blinking light and everything...please advise

 

read "EASY ECU RESETTING" thread. It's near
the bottom.

God I love this car!

 

<font color=blue>ScottG61376</font color=blue>, GeoBau is right, you don't lose any important data in the navi, just average mpg's, not sure about mpg's history, when you do the 12 hr batt disconnect.
Besides the radio presets you mentioned, and the mpg data on navi, only other thing you lose is the resettable odometer (trip) miles (A + B).
If you do the batt disconnect, be sure to disconnect the negative terminal for safety. Diconnecting the positive terminal can leed to arcing.

<font color=blue>SixFive</font color=blue>, Here's the link you asked about :
Easy ECU reset


<font color=red>GSM</font color=red>

 

Haven't done it myself, but the dealership's disconnected my battery on a few service trips.

In addition to the trip computer info, you also reset the maintanence reminders when you disconnect the battery. Nothing Nav-related seems to be lost, though.

2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter