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I've posted this on a few other forums but wanted to make sure my bases were covered:

I jumped in my Tundra after work yesterday and headed down the road. I had the music turned up pretty good but not really too loud and I was using my iPod interface cable to control the iPod. A few minutes into the drive with remote in hand, I went to change to the next song... then all of a sudden my AVH-P4100DVD shut itself off for no apparent reason. It was completely black, none of the push buttons were lit up, and I could not turn it back on with any of the buttons. At the next stop light, I turned my truck off and then turned it back on and the my P4100 turned back on as if everything were normal. All settings were still there (audio, presets, etc.), although my iPod Nano started back at song #1.

I've had my AVH-P4100DVD installed for probably 4-5 months now and this is the first time that this has happened. All of my connections are soldered and shrink wrapped and I tested it out when I got back home by cycling the ignition on and off and hitting the dash to see if there are any loose connections. Everything functions normally now. My theory at this point is that my pioneer H/U has some sort of thermal shutdown in the event that internal temps are too high. To make matters worse, this is one of the only big screen Pioneer H/Us that does not have a cooling fan and yesterday was the hottest day that we have had here since I installed it. My only issue with this theory is that I can find no indication that there is a thermal shutdown in this headunit.

With regards to the Tundra, I've reviewed the schematics and I see no breakers or anything else in the circuit that would cause this (cutting 12V power and then resetting once the ignition is turned off and then back on). I only see a 15A constant 12V fuse and a 7.5A switched 12V fuse which would both stay open in the event of an over current-situation.

I'm thinking my problem resides within the headunit.....what do you guys think?

Thanks so much,

Wes
 

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I have a pioneer 980bt Hu, that occasionally has the screen go black (blank like powered down), but the audio is still active. Or, I'll be "stucl" on a certain page and cannot adjust volume or parameters. This is a motorized screen, which I'm reading is similar to yours. It seems like thi mis-function happens when I've left the HU in a long time without use, or even if I've removed the screen-face-plate, but been out of town for a while. I think it all has something to do with the motorized contact points when the unit gets hot, or perhaps the contacts get dirty/condensation,or other when not used for awhile. The "restart" on my system motorizes the screen back into place, and always solves the temporary problem. I also have tried to just wiggle or push the screen a little to help rub the contacts, and many times that solves the problem. One thing for sure - if I'm using the HU every day, I don't really experience the problem, it's only after an inactive period.

Luther
 
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