VerbalK Posted July 8, 2016 Report Share Posted July 8, 2016 So I read all the info about pulling jumpers and resetting system for audio problems, usually when the audio won't turn off... but I've had an intermittent problem with the audio not turning on. I've determined the issue is when I park in full sun at work. Temp usually has to be in the 90s. Until the car interior cools down (usually about 10-15 minutes for full A/C), then stop/start the engine, the radio and sound system (including bluetooth) won't operate. It will turn on for a moment, then snap off before any sound is initiated. I'm guessing this is some bit of circuitry that defaults off when over a certain temp. Anybody have any thoughts. I could always buy a sunshade, assuming the issue is somewhere in the dash area. Quote Link to comment Share on other sites More sharing options...
obob Posted July 9, 2016 Report Share Posted July 9, 2016 Sounds like you would benefit with a sun shade even if it didn't fix the radio problem. There are message threads on sunshades complete with pictures. I have a more expensive custom fit one - Intro-Tech Automotive Ultimate Reflector Car Sun Shade . In three years it still works though it seems to be a bit looser at the joints. I do not recall other sound system overheating discussion and I have been on the site for over 3 years. So if your car is still under warranty you might be able to let the dealer handle it. That is not suppose to happen. Quote Link to comment Share on other sites More sharing options...
plus 3 golfer Posted July 9, 2016 Report Share Posted July 9, 2016 Is there any other electrical equipment that does not work when this happens? There is a load shed strategy when the 12 V battery falls below a certain level (IIRC somewhere around a 40% SOC). I have never seen a list of equipment that is shut down when this happen but know the Infotainment Systems are shut down. I would assume that the charging algorithm for the 12 V battery is temperature compensated (like the voltage regulators in alternator charging systems). Lead acid battery life can be increased by lowering the charging voltage when the 12 V battery is subject to high ambient temps. We also know that the 12 V battery data is monitored via a sensor in the negative cable. Perhaps the battery is failing and the SOC is below / near the 40% threshold on startup and charging via the DC/DC converter is limited because of high cabin temperature. Then, perhaps, the load shed program is initiated. One other comment. There is a sun load sensor in the center on top of the dash. It can be pulled out as there are spring clips on the sides. I know this sensor affects the operation of the climate control system but maybe its data is used by other modules. Try covering it or perhaps disconnecting it and see what happens. I'm going to say this again (as I've said in many threads) that there may be DTCs present in the modules. The ForScan App could be very helpful in checking modules for DTCs and monitoring data from the modules during this condition. Is a module "dead", not responding, what is its status, is there a broadcast load shed message to the modules, or something else happening? BIG ROCCO 1 Quote Link to comment Share on other sites More sharing options...
N7VY Posted July 20, 2016 Report Share Posted July 20, 2016 I would honestly doubt that the heat is effecting your audio system. I live in Phoenix and the car gets really hot, maybe 180 degrees. If it's 120 outside it has to be 60 degrees hotter in the car. When I was having issues in the audio and gps systems, I unhooked all the connectors I could get to and use contact cleaner on them. Took care of all of my problems. To find where the locations are I bought a c-max manual on eBay. It works on pc's only ( I'm a Mac guy) and I paid about $10.00 for it. Quote Link to comment Share on other sites More sharing options...
BIG ROCCO Posted July 20, 2016 Report Share Posted July 20, 2016 I would honestly doubt that the heat is effecting your audio system. I live in Phoenix and the car gets really hot, maybe 180 degrees. If it's 120 outside it has to be 60 degrees hotter in the car. When I was having issues in the audio and gps systems, I unhooked all the connectors I could get to and use contact cleaner on them. Took care of all of my problems. To find where the locations are I bought a c-max manual on eBay. It works on pc's only ( I'm a Mac guy) and I paid about $10.00 for it. I concur - no problems here in Phoenix. N7VY has some good suggestions, and Plus 3 might also be on to something - you do have a first year SE, which are more prone to 12V battery issues. Please keep us updated Quote Link to comment Share on other sites More sharing options...
VerbalK Posted August 31, 2016 Author Report Share Posted August 31, 2016 (edited) It's def heat or sun related. Happened again today. Only seems to happen if I park in full sun on a 90+ day. Solution is to run car until interior cools. Stop car for a few minutes. Then start again. It's only the sound system that goes. The bluetooth still connects with phone, but won't work with hands free. I push the radio power , it looks like it's :loading", then turns off again. Maybe it's some wiring lead issue. I'm running for a dash cam in a few weeks, so I guess I can take a look. I have the APIM warranty extension flag in my sync account. I'm sure it's not really related, but maybe I can get a ford dealer to poke around for free. Edited August 31, 2016 by VerbalK Quote Link to comment Share on other sites More sharing options...
Adrian_L Posted September 2, 2016 Report Share Posted September 2, 2016 Somewhat unrelated but I just did a load of online research about vinyl protectant spray and found this stuff called 303 Aerospace. They don't sell it in Canada but I picked some up at Napa parts in Seattle. Seems to be popular among boat guys and classic car enthusiasts Worth protecting that acre of plastic and vinyl under the windscreen. Quote Link to comment Share on other sites More sharing options...
RockwallRick Posted September 8, 2016 Report Share Posted September 8, 2016 I use Aerospace 303 for my Truck Bed Cover, expensive but provides excellent protection from the Sun! My Cover is still like new after 10 years in the Florida and Texas Sun. I get it at West Marine Boat supply stores. I also use it on the dash and never had any issues with cracking. :rockon: Quote Link to comment Share on other sites More sharing options...
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