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Thread: D3 Telephone ECU

  1. 4th August 2016, 12:48 PM #1
    Tinman
    Tinman is offline Master
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    D3 Telephone ECU

    Hi Guys, The telephone system in my 09 D3 has started to drop out when on a call. You can call back everything is ok for a while. Checked for faults and I am getting in the Telephone ECU a fault code U3003 Battery voltage. I was getting this fault before I changed my alternator and I thought it might go away with the new alternator installed pumping out more volts. Not sure whether it is a bad connection to the ECU or something else. Does any one know where this ECU would be located so I could have a look and see.
    Cheers
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  2. 4th August 2016, 12:57 PM #2
    sheerluck Guest
    From memory, it's behind the right hand (driver's side) trim panel in the boot.
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  3. 4th August 2016, 01:31 PM #3
    Tinman
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    Hi Dave, pulled the jack out but the only wiring I can see is for speakers and entertainment system and tail lights. Do I need to pull anything apart to get in there
    Cheers Bryon
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  4. 4th August 2016, 01:33 PM #4
    Tombie Guest
    Up the front end of that panel
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  5. 4th August 2016, 01:35 PM #5
    sheerluck Guest
    And you need to pull that whole trim off to get to it.
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  6. 4th August 2016, 02:22 PM #6
    Tinman
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    Thanks guys found it unplugged and plugged all the connections a few times. Called up the car a few times hasnt thrown up a fault yet. Let it go for a while and see what happens
    Cheers.
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