joegr Posted January 15, 2009 Report Share Posted January 15, 2009 I do not have any trouble starting the car. But, last weekend when I was going through the settings on the unit and had the key in ACC position for about 45 minutes to an hour I could not start the car and had to jump it. After that happened I started to have this boot problem. The battery light does not go on. If it was not for the fact that, when I have the key in the ACC position the unit works normally I would think the battery or the alternator is bad. Also why does it happen only when the car stands still and off for a time period but works after the car is moved a short distance? HELP!!!!!!!!!!!!!!!!!!! Your battery should hold up for longer than an hour with the radio on. I strongly suspect that you do need a new battery. How old is your battery? Get the biggest one you can that fits your battery compartment. Quote Link to post Share on other sites
nkosi Posted January 16, 2009 Author Report Share Posted January 16, 2009 I do not have any trouble starting the car. But, last weekend when I was going through the settings on the unit and had the key in ACC position for about 45 minutes to an hour I could not start the car and had to jump it. After that happened I started to have this boot problem. The battery light does not go on. If it was not for the fact that, when I have the key in the ACC position the unit works normally I would think the battery or the alternator is bad. Also why does it happen only when the car stands still and off for a time period but works after the car is moved a short distance? HELP!!!!!!!!!!!!!!!!!!! Okay, the nice thing about your problem is that it is repeatable. I would first start by isolating the problem. Is it something wrong with your power system or your radio? If it is a problem with your radio then you can send it back. If it is a problem with your power system, lets say your battery then you can replace that. So, to isolate the problem, I would connect a voltmeter to the ACC or the Battery constant (+12V) that goes into your radio. I would first start off with the Battery constant (+12V). Jump in your car and begin driving, when the problem occurs, look at your voltmeter and see if the voltage drops below an acceptable level. For the AVIC, that acceptable level would be +10.8V. If it doesn't drop below an acceptable level then repeat procedure, this time for the ACC. If you don't observe significant voltage drop then the problem must be a defective radio and you should be able to get it replace under warranty. If it is the ACC/+12V then you know you either have a problem with your battery or alternator. If you suspect your battery or alternator take your vehicle to the nearest Autozone where they will test your battery/alternator for free and determine if you need a new one. I hope this helps and good luck. Quote Link to post Share on other sites
rollgrinder Posted January 16, 2009 Report Share Posted January 16, 2009 Problem is solved. I had the battery checked and it was bad. Replaced battery and ererything is fine. Now I have to go through all the settings and change where needed. 411 is great. Quote Link to post Share on other sites
nkosi Posted January 16, 2009 Author Report Share Posted January 16, 2009 Problem is solved. I had the battery checked and it was bad. Replaced battery and ererything is fine. Now I have to go through all the settings and change where needed. 411 is great. Good for you !!! Quote Link to post Share on other sites
dunkchamp55 Posted March 14, 2009 Report Share Posted March 14, 2009 crap, maybe i should check my battery before i send my 90bt in for service.....ive had the same problem but nothing i do gets the 90bt to boot up itll just shut down.....guess ill have the battery tested and maybe throw the unit back in the car.........damn you avic411 damn you...... Quote Link to post Share on other sites
savgun Posted March 15, 2009 Report Share Posted March 15, 2009 I have the same issue, but I have two batts (F-250 diesel) So, two bad batts? Quote Link to post Share on other sites
rollgrinder Posted March 16, 2009 Report Share Posted March 16, 2009 If your car is more then two years old and is used every day I do not care how many batteries you have it could happen. Especially if your HU is working and then one day, all of a sudden, it goes to blank screen when starting your car. Another indication is after you experience the blank screen and then you drive your car awhile and then restart your car and the HD unit works. Believe it, I saw it with my own eyes. Quote Link to post Share on other sites
mnrivera210 Posted March 20, 2009 Report Share Posted March 20, 2009 Mine does the same thing! I have a 2008 Civic Si and it always shuts off the radio when I crank the engine, the stock radio would do the same... I don't think its the battery because its a fairly new car... however the battery is small. Quote Link to post Share on other sites
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