No sound after battery swap W/ Nav
 

I just put a new battery in my 2010 Touring/Sport/Nav now I cant get any sound out of the NAV or the stereo. I can still get confirmation beeps from the nav system but no sound to the speakers. I checked all the small fuses in the drivers footwell and they were all good. Everything else in the car works just fine...

Any suggestions??

Thanks!!!
Fred


Updated at Post #11

Are you sure the "confirmation beeps" are coming from the Nav? My first guess would be a blown fuse and you are hearing the car's wake up sound. Check the Owner's Manual for location.

How did you check the fuses? A visual check is not very reliable. Use a volt (or ohm) meter or test light.

Visual volume display working? Other than a blown fuse, like Southark said, I can only think of some sort of weird menu setting needing to be re-set...

I was in the settings and turnd the confirmation beep on. So it will beep whenever I select anything. The sound indicator works just fine. It will go though radio, aux, ext... and no sound. The GPS will direct but make no sound either.

I did just do a visual inspection. I will check with a meter when I get a chance and see if I notice anything.

Ah. Since the Nav beeps, it's getting some power ... but there may be more than one power feed.

If you don't find a blown fuse, then you may want to pull a battery cable and hold the brake pedal down for a few seconds to kill power to the whole car. This may reset the Nav. This will reset the tuning params in the ECM, so you will have to drive around for a while before the car will run normally.

If that doesn't work, download the FSM and start reading.

Edit: Check the wiring between the Nav and the radio.

Ok, well that gives me a few things to check out. I will get back with what I figure out.
Thanks

If all fails, unplug the stereo harness and plug it back in

That sounds like a better solution than pulling a battery cable.

Yah, almost sounds like the amp is not getting the wake signal.

pulling the stereo out does not sound fun haha. I am used to cars from the 90s where you just pop the dash cover off.

so I finally got back around to working on this...

I pulled the amp, pretty obvious no damage to it. I turned the stereo on and checked all the pins on the larger plug to see if there was any power coming to it and I did not see any power on any of the pins (I am not sure of the pin out of the plug, just checked all the pins).
Next I checked the 20 amp fuse in the driver kick panel and it was good, I also checked the 15 amp fuse near the battery and it was also good.
I then checked the voltage across where the 15 amp fuse goes by the battery and it was getting 10 volts (radio on).
I checked the voltage across where the 20 amp fuse goes in the driver foot-well and got nothing.

I have dash kind-of apart right now because im installing a back up camera and av switch into the car. So I can look into any suggestions you guys have now. I may try plugging everything back in and see if that solved the issue or not. I searched for wiring diagrams but wasn't able to find any detailed schematics.

Any ideas?

Not sure if this will help but when I installed my backup camera and bypass switch from the carkit company I blew a fuse. I replaced the fuse and still had no power to my nav screen. I checked every fuse in the car and even replaced some that weren't blown, I even took the whole fuse block out to check for burnt spots and still nothing. I finally decided to take it to the dealership to have the warranty cover my nav screen. I took out my camera and bypass switch and the screen still didn't work. I then decided to put all the fuses back to stock specs, I had some 10 amp fuses where 15 amp fuses should be and etc. After I did that I started the car up and the nav screen came on and worked fine. I still have no idea what the problem was but it has been working ever since.

Interesting. I will check all the fuses to be sure they have the proper fuse in place. I am really going to dig into this this weekend and try to get it figured out.

A visual check of fuses can be misleading - put a volt meter on 'em.

You have a constant power feed and a switched power feed that feeds into the connector. The constant power wire should always show power and 12 V when the battery is connected and the fuse is in place and good. The switched power should show 12 volts when you turn the key to the on position. Put a meter on the connectors and check it. I think the constant power wire is yellow and the switched is orange. My constant power wire got shorted someplace inside the wiring loom when I did my install, fuse was good, but no power. Drove me nutty till i fixed it by finding another constant 12V tap on the fuse box.

OK. So I did put a volt meter on the harness plugs back there and didnt see any power on any of the pins. So looks like I may be running some new power wires...

Did you have any issues during the battery replacement process? I don't understand why it would stop working. Did you accidentally grounded the positive cable or had everything on while you disc/conn the battery?

There are fuses to protect all the power sources. So the fuses would blow even if you have any abnormalities during the battery installation.

I replaced the battery on a g37 with Nav and the only thing we had to do was reinitialized the windows.

Did you check the fuses in the fuse box next to the battery?

Yeah, so my helper moneky swapped the cables when jumping the car. I have been checking all the fuses that are obviously related to the system and have not found anything.


Yeah there is a 10amp radio fuse right there. It has power there.

So you connected the cables incorrectly while jumping the car? I'm surprise you didn't have more damages if that was the case.

everything else works just fine in the car aside from the speakers. This happened in October and I just havent had time to address it, been driving it since then (with a new red top optima) with no other issues.

I plugged everything back in and still don't have sound. It would be nice to get a hold of the factory wiring diagrams so I could actually see the circuits.
I am going to buy some new fuses and just replace whats in there.

Does the radio power on and lights up but no sound comes out?

yeah EVERYTHING works just no sound. The volume gauge goes up and down on the screen, i can channel through stations, inputs, everything. Just no sound. I have really been looking for a wiring schematic so I can maybe trace something down.

Wiring diagrams, wire colors, &c are in the FSM. See link in my sig.

Thanks. I cant pull up those files at work. I will check when I get home.

Replaced all of my fuses even though they all appeared to check good and it works now. So there's that

Yeah that's pretty much what fixed my issue, except I used the same fuses in different locations. It seems like you had to cut power to something for a second to reset it so it will work again. Even though my battery was disconected for like 3 days. It doesn't make sense but I'm glad it worked.

Yeah, its definitely nice to have it working again. Its kind of annoying it was something that simple, haha. But at least it was an easy fix!