Wanted to tell my story so that this doesn't happen to anybody else.
I updated my lady's 2015 Legacy with Nav to NU9020 yesterday, and had a scare.
Everything is fine now (The MPG in cluster is at 0, but I think a redo will fix it).
The first USB update failed, so i started over. The second time worked. Then I started the second USB update. It worked the first time, I checked the DB number. I thought I was done for a second but then I remembered to complete the update I needed to do the memory initialization, so I went to do that. I didn't read the instruction that mentions "Hold the Ok button for 5 seconds." So i clicked it once, and nothing happened. I clicked it again and it started the initialization then the screen shut off. "That's odd." I waited about 10 minutes in the 105 degree Cali heat. Then the lit buttons next to the screen shut off. Then 10 minutes later the dash lights went off. Strange... "Did the battey die?" I pressed the overhead light above me on to check. The light seemed very bright so I dismissed that Idea. I thought "Maybe because I didn't hold it for 5 seconds something went wrong?". So I waited another 10 minutess.. Finally I decided to shut the ACC off. When I turned ACC back on, everything came back on VERY slowly. The head unit kept turning on and off. Car wouldn't even try to start. I thought I bricked it. I spent 30 minutes trying to use the first USB to restore everything. I turned the ACC off and on with the USB drive in it flashing thinking maybe it would autodetect failure and restore itself from USB (As a Computer Science major, That seems like a good disaster recovery procedure.) 30 minutes later nothing. So I finally popped the hood and checked the battery and it was at 9.5 volts. *STUPID*
Please, for the love of god don't end up like me.
USE A CHARGER
I understand I am very VERY lucky that the battery died a few minutes after the updates, and not during.
I wasn't playing music, I didn't have lights on, no fans spinning, NOTHING. I thought for sure the battery wouldn't die. Especially with previous cars I've owned, I've often left interior lights on all night and the cars still started fine. Something about this car sucks battery fast, or my girl's battery is on it's way out. Who knows but please learn from my f***-up.
After jump starting, everything was updated and is working fine.
Thanks again to JDog!
