New member, audio issue

Discussion in 'Generation 4 - Maintenance & Troubleshooting' started by TRCobra506, Jul 7, 2018.

  1. TRCobra506

    TRCobra506 New Member

    Joined:
    Jul 7, 2018
    Messages:
    17
    Likes Received:
    3
    Gender:
    Male
    Location:
    PA
  2. TRCobra506

    TRCobra506 New Member

    Joined:
    Jul 7, 2018
    Messages:
    17
    Likes Received:
    3
    Gender:
    Male
    Location:
    PA
    No AC voltage at these pins
     
  3. TRCobra506

    TRCobra506 New Member

    Joined:
    Jul 7, 2018
    Messages:
    17
    Likes Received:
    3
    Gender:
    Male
    Location:
    PA
    So these pins are analog out of the ACM to the DSP? Does the APIM send a digital signal to the ACM that it converts to analog?
     
  4. Johnbigdog

    Johnbigdog SHO Member

    Joined:
    Feb 17, 2017
    Messages:
    476
    Likes Received:
    451
    Gender:
    Male
    Location:
    michigain
    No. Not that I'm aware. The A.C.M. is a pass through.

    I don't think there is a digital audio signal until you get to a lot newer audio systems with an automotive audio buss. This is a fancy name for a u.s.b. cable. But even then I'm not sure.

    So one would have to work back to the A.C.M. on the passenger side kickpannel there is a large black 59 pin connector that those wires pass through. Your going to find those wire colors in 8,9,10 and 11.

    C240A at the ACM behind the FCIM will be a black 24 pin conector. Pins 10 & 22 left, and 11&23 right. Colors are all the same. You can back probe the ACM connector with a sewing pin to see if there is output.

    If there is no output, the radio isn't "on" or the box is possibly bad being you can select stuff (am/fm/satellite) but nothing happens.

    Still doesn't quite explain your other concerns.
     
    Last edited: Jul 9, 2018
  5. Johnbigdog

    Johnbigdog SHO Member

    Joined:
    Feb 17, 2017
    Messages:
    476
    Likes Received:
    451
    Gender:
    Male
    Location:
    michigain
    Just so we are on the same page, that is the A.C.M.
     
  6. TRCobra506

    TRCobra506 New Member

    Joined:
    Jul 7, 2018
    Messages:
    17
    Likes Received:
    3
    Gender:
    Male
    Location:
    PA
    Yep we are on the same page. That’s where I back probed for the AC speaker output to the DSP. Pretty solid 0v

    Cd will act like it’s playing but also no output from the ACM. I would assume the the APIM has nothing to do with playing a cd other than telling the ACM to select it as an audio source seeing as how the CD is in the ACM itself.

    Stab in the dark must be the ACM? The FCIM was disconnected and connected for all these tests. No change in symptoms. All modules disconnected and reconnected, no change
     
  7. Johnbigdog

    Johnbigdog SHO Member

    Joined:
    Feb 17, 2017
    Messages:
    476
    Likes Received:
    451
    Gender:
    Male
    Location:
    michigain
    You are correct that a c.d. does not go through the APIM. The ACM sends this out to the DSP.
     
  8. TRCobra506

    TRCobra506 New Member

    Joined:
    Jul 7, 2018
    Messages:
    17
    Likes Received:
    3
    Gender:
    Male
    Location:
    PA
    Well the time has come to buy an ACM or try the stealership for a firmware update with explicit instructions not to touch or replace anything
     
  9. Johnbigdog

    Johnbigdog SHO Member

    Joined:
    Feb 17, 2017
    Messages:
    476
    Likes Received:
    451
    Gender:
    Male
    Location:
    michigain
    It would be helpful to see if there are any DTCs present. A new module needs programming so it may be a dealership visit anyways.
     
  10. TRCobra506

    TRCobra506 New Member

    Joined:
    Jul 7, 2018
    Messages:
    17
    Likes Received:
    3
    Gender:
    Male
    Location:
    PA
    Theres no DTCs, I have a snap on modus. Nothing weird in the data either
     
  11. Lostneye

    Lostneye SHO Member

    Joined:
    Feb 23, 2017
    Messages:
    720
    Likes Received:
    556
    Gender:
    Male
    Location:
    NY
    Or forscan.
     
  12. TRCobra506

    TRCobra506 New Member

    Joined:
    Jul 7, 2018
    Messages:
    17
    Likes Received:
    3
    Gender:
    Male
    Location:
    PA
    I might be able to program it if it’s needed, maybe. Sometimes in functional tests I will have those options. I can program OEM keys with the last update I received
     
  13. TRCobra506

    TRCobra506 New Member

    Joined:
    Jul 7, 2018
    Messages:
    17
    Likes Received:
    3
    Gender:
    Male
    Location:
    PA
    ACM fixed it, no programming necessary. On another note. I found out this is a pre production car. Built in 2011
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
     
    SHOdded likes this.
  14. Johnbigdog

    Johnbigdog SHO Member

    Joined:
    Feb 17, 2017
    Messages:
    476
    Likes Received:
    451
    Gender:
    Male
    Location:
    michigain
    Saweeet!


    If you got a used part, it was programmed. If it's new.... I don't have a good answer.
     
  15. TRCobra506

    TRCobra506 New Member

    Joined:
    Jul 7, 2018
    Messages:
    17
    Likes Received:
    3
    Gender:
    Male
    Location:
    PA
    Used part, pulled from a 2013 limited. No programming for sure. I use this yard a lot and they had none of my cars info. But happy it works!

    Sounds good. Is there any info about pre production cars on here? Car came from Detroit, going to run a carfax on it and see what it says. Every piece has pre production written on it vin ends in 00134
     
  16. Johnbigdog

    Johnbigdog SHO Member

    Joined:
    Feb 17, 2017
    Messages:
    476
    Likes Received:
    451
    Gender:
    Male
    Location:
    michigain
    With swapping parts, your ESN for Sirius satellite radio changed. If you had an active account, you may not any more.

    I don't know about the preproduction thing.
     
    Lostneye likes this.
  17. TRCobra506

    TRCobra506 New Member

    Joined:
    Jul 7, 2018
    Messages:
    17
    Likes Received:
    3
    Gender:
    Male
    Location:
    PA
    Yeah no previous subscription, it hasn’t worked since I got it haha. Well carfaxed it. It was built a year before it was first titled. Built November 2011
     
    Lostneye likes this.
  18. 2011TAURUSSEL

    2011TAURUSSEL 2014 SHO LMS Stage 1 V10

    Joined:
    Jun 16, 2013
    Messages:
    881
    Likes Received:
    477
    Gender:
    Male
    Occupation:
    Aviation
    Location:
    DFW Metroplex, USA
    Since you have gone that far in tearing apart the center stack perhaps you wouldn't mind one more step. The Center instrument panel speaker the 3.5" Pretty much anything besides the OEM one will help. I used Kicker myself but your discretion. Make a note with a decent three way speaker the center voice coil will be ABOVE the level of the grille. Solution is to get a couple of thin washers, 2 anchor clips and two self tapping screws and install the speaker UNDER the plastic. If you are interested I might still have some photos of mine from about three years ago. There is also a VERY SMALL amount of trimming of the plastic but it will be UNDER the grille and in a non visible area.
    If interested PM me email address and I can try and dig them out.
     
    Lostneye likes this.
  19. Lostneye

    Lostneye SHO Member

    Joined:
    Feb 23, 2017
    Messages:
    720
    Likes Received:
    556
    Gender:
    Male
    Location:
    NY
    I guarantee the yard didn't program anything. There isn't a ton that needs to be programmed in the ACM and being it came form a Ltd which is the highest trim level besides the SHO it probably had satellite, Sony, already.
     

Share This Page

If you wish to help keep SHOforum running, please click the donation button below