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Thread: Need help diagnosing why I have no audio/nav function

  1. #1
    Join Date
    Apr 2021
    Location
    North New Jersey
    Posts
    5

    Need help diagnosing why I have no audio/nav function

    So when I bought my car the audio and everything worked fine, then it sat for about 2 weeks and moved maybe twice while I waited to be able to register the vehicle (appointments at the DMV are scheduled a month ahead here). Now the I have no radio function/nav function and no audio at all. When I open the door the nav screen displays BMW but after that nothing else. Not sure of the age of my battery but tomorrow I will go check it out and see if a need a new one or a recharge and hopefully that fixes the issue. Any other ideas on why my radio could be doing this? Could it possibly be the amp? Any help will would be appreciated

  2. #2
    Join Date
    Jan 1970
    Location
    Lexington, KY
    Posts
    4,474
    I don't have nav in my car. Does your Nav display everything and the only problem is sound? Could be a sign that the amp in your trunk is not working. No sound on any of the inputs?
    325i, 2005, 5MT, Silvergrey, leatherette, Sport package; CDV delete, KONI STR-T & KYB Excel-G, Weisslichts, Stewart H2O pump

    328i, 2010, 6MT, Spacegrey, dakota leather, M-sport packages; all stock
    http://s900.photobucket.com/user/othibau/media/Junesig.jpg.html][IMG]http://i900.photobucket.com/albums/ac208/othibau/Junesig.jpg

  3. #3
    Join Date
    Apr 2021
    Location
    North New Jersey
    Posts
    5
    Quote Originally Posted by Oli77 View Post
    I don't have nav in my car. Does your Nav display everything and the only problem is sound? Could be a sign that the amp in your trunk is not working. No sound on any of the inputs?
    So currently the nav really does nothing but react whenever I get in and out of my car by displaying the BMW letters and then the screen stays black. i cannot switch to any other inputs and I even tried playing a cd but nothing works currently. At night all buttons on the radio light up and I am able to dim them so I do think it has power going to it. I was also thinking it could be the amp but i will double check the connections today and check for any corrosion or signs of extreme wear.

  4. #4
    try pulling the fuses associated with the radio/nav unit then after a few seconds reinsert the fuses. See if the power interruption will reset the radio/nav computer...

    Fuse 7 and 41. Pull both of them out then wait a few seconds before reinserting them.

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