ego
Posts: 3
Joined: Sun Oct 14, 2018 10:41 am
Delivery Date: 14 Oct 2018

How to reset AV (Audio Visual) & Navigation unit ?

Sun Oct 14, 2018 11:03 am

Hi,

I did 12v battery maintanance.. Leaf was giving me all sorts of errors that are now fixed. But I think the AV / Navigation unit went crazy while I tried to figure what is wrong during low 12v battery situation taht I had no clue of. (I had Airbag, Brake, PS leds all up and no Lithium battery connection and only 12v, with all attempts to start normally, as symptoms on display.)

So now the 12v is ok, I get no warning leds on dashboard and Lithium main battery connects fine and driveing is possible.

But the AV / Navigation unit is in FM mode, the buttons (multifunction switch) beside 7'' AV/Nav screen dont work at all.
Nothing happens If I push any of them (Menu/Seek/Vloume etc.). The below AC/Climate buttons work perfectly. In nightmode the m.f. switch buttons have night lights working tho, but clicking makes nothing happen even then.

So I have tried to disconnect 12v neutral again and wait.
ON, then OFF. Waited 1 minute, disconnected 12v, waited 3min, reconnected. AV/Nav side buttons aka m.f. switch buttons still dont work.
AV/Nav screen is still stuck on FM radio mode.. touch screen still works, but no way to change mode. Wheel volume buttons work, but no sound via FM radio as before.

So I have tried to disconnect AV/Nav unit power.
In front of battery I saw a fuse box, inside the lid case I found "AUIDO" fuse, its with "20" mark first in row of similar tiny fuses.
I pull this fuse out. I start Leaf - everything starts but not the 7'' LCD screen, so AV/Nav indeed was unpowered.
I put the fuse back. I start Leaf again - still same situation.. 7'' LCD stuck in FM radio mode and sidebuttons not working.

There I found manuals:
https://carmanuals2.com/brand/nissan/leaf-2013-373
I checked "Audio Visual System (Section AV)" manual
I try searching reboot/reset/defaults, but find nothing useful.
Page AV-345 .. I found...
Image
But I have no idea what to do with those connection numbers.. like where are they?

So how to properly factory reset or soft reboot the damn AV/Nav thing to get it unstuck, I want my buttons working again.

User avatar
Stanton
Posts: 2107
Joined: Thu Feb 03, 2011 10:56 am
Delivery Date: 01 Sep 2011
Leaf Number: 7458
Location: Plano, TX
Contact: Website Twitter

Re: How to reset AV (Audio Visual) & Navigation unit ?

Sun Oct 14, 2018 12:37 pm

ego wrote:Hi,

I did 12v battery maintanance.. Leaf was giving me all sorts of errors that are now fixed. But I think the AV / Navigation unit went crazy while I tried to figure what is wrong during low 12v battery situation taht I had no clue of. (I had Airbag, Brake, PS leds all up and no Lithium battery connection and only 12v, with all attempts to start normally, as symptoms on display.)

So now the 12v is ok, I get no warning leds on dashboard and Lithium main battery connects fine and driveing is possible.

But the AV / Navigation unit is in FM mode, the buttons (multifunction switch) beside 7'' AV/Nav screen dont work at all.
Nothing happens If I push any of them (Menu/Seek/Vloume etc.). The below AC/Climate buttons work perfectly. In nightmode the m.f. switch buttons have night lights working tho, but clicking makes nothing happen even then.


I think whatever you did between "tried to figure what is wrong during low 12v battery situation that I had no clue of" and replacing the 12v battery fried your head unit (at least the "brains" of it). Pulling the 12v power is about the same as pulling the audio fuse, so you've already "rebooted" the unit; once you've gotten into the manual/diagnostic procedure, you may as well take it to the dealer...who will probably just replace the head unit.
Don't shoot the messenger.
2011 Blue Ocean SV w/floor mats & window tint
12v LiFePO4 battery & FIAMM 74100 horns
Wet Okole seat covers (front)
Tor's low-power heater mod
2013 sun visor
3G modem upgrade
L2 EVSE Upgrade
Battery Pack replaced (Rev E) @51 months and 41k miles

ego
Posts: 3
Joined: Sun Oct 14, 2018 10:41 am
Delivery Date: 14 Oct 2018

Re: How to reset AV (Audio Visual) & Navigation unit ?

Sun Oct 14, 2018 12:48 pm

The whatever I did " was in the salong " .. switched off airbag, tried ON/OFF. I doubt this fires anything. I also "looked" at the brake fluid level, it was ok. But WHEN the 12v is low and you get anomalies on dashboard etc... ON/OFF function sometimes didnt turn AV/Nav unit on, I think it lacked proper power at some times.. and this I think somehow froze the AV/Nav system.

ego
Posts: 3
Joined: Sun Oct 14, 2018 10:41 am
Delivery Date: 14 Oct 2018

Re: How to reset AV (Audio Visual) & Navigation unit ?

Tue Oct 16, 2018 12:42 am

I finally found the issue, I had misplaced a fuse while checking them.
At the left of steeringwheel fuse compartment had actually on the cover of the compartment description for every fuse - i didnt notice this before.
And there is an empty slot and then Audio/Mirror fuse.. I had placed the Audio/Mirror fuse to the empty slot - silly me.
I had car turned on while putting this fuse back - and buttons and also mirror controls that I didnt notice didnt work before also started working.

But it's still a mystery on how to rebood AV/Nav unit if the buttons actually do malfunction.. service manual had only replacement instructions. I heard it should be Windows Car (ARM maybe) computer.. I guess the computer has internal battery also.. or flash memory witch saves last state always.. or smthng.

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