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Aftermarket HU- Do I need CANBUS adaptor?

Discussion in 'In-Car Entertainment' started by StuHolmes, Jun 7, 2008.

  1. StuHolmes
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    StuHolmes New Member

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    I have a 2005 A3 Sportback SE with a non-BOSE Concert2, no multi-function steering wheel. Have been thinking about changing the HU as I need mp3 also would like built-in bluetooth.

    Really like Beckers Grand Prix units - smart simple OEM look:cool:, but @ £300 bit more than I (the wife! :whip:) wants to pay really. Am now considering Blaupunkt Hamburg MP68 as it has all the features I want and the display colour can be changed to red (shame about the big blue spot) and it can be had for less than £200. If anyone has any other suggestions that look good in an Audi and have bluetooth?

    Before I go ahead thought I should check out what else I need, was going to get the CANBUS interface till I saw the price (£100!). I read on another forum that the speed signal can be taken from the speedo? the illumination signal from somewhere?! and the switched live from a fuse? Am I right? If someone could confirm where I can find these connections and how I access them! :anbet:

    There is nothing else the CANBUS interface would provide is there? So all I need is a fascia, aerial adapter ?PC5-52 and ISO adapter ??PC9-401
    Am I missing something??
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  2. AndyMac
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    AndyMac Moderator Staff Member Moderator

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    If you go with Becker or Blaupunkt you don't need the PC9-401 as they already use the same 20 pin mini ISO interface as the stock unit.
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  3. Oranoco
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    Oranoco Well-Known Member

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    Friend of min uses the Becker unit in his A4. It fits in woith the dash a treat. Certainly looks more factory than my Alpine 9812RB
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  4. AndyMac
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    AndyMac Moderator Staff Member Moderator

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    Also you only need the CANBUS emulator to provide switched live for the HU so it goes on/off with the ignition. You can wire your own one in for about 10p, or just turn it on/off manually.
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  5. StuHolmes
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    StuHolmes New Member

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    While I was still dithering over the Becker or Blaupunkt I stumbled upon a Dietz canbus adaptor on ebay (£40).
    Since then I have now bought a Pioneer DEH-p700bt, [​IMG] although not as "factory" looking as the becker it is black with buttons and a display which can be changed to red, I think it looks quite good and also has direct control over Ipods and usb devices. I have a 20gb mp3 player sitting around not being used, it will now live in my glovebox! [​IMG]
    Now I find out the Pioneer has no inputs for illumination or GALA so all the canbus is supplying is a switched live. Should have listened to AndyMac. :banghead:

    I think I have the wiring situation under control, well nearly. I have a PC9-404 which is for non-bose rear amplified cars. The original wiring in my car has no connections for rear speakers in the iso block, they are connected to the 20pin mini-iso which the harness converts to RCA plugs and also provides a feed to turn on the rear amplifier.
    As for the antenna, I have a PC5-90 which includes a feed for the aerial amp which need connecting to the harness also.
    I was quite happy with all this and was pretty sure about what to do until I took out the Concert 2 HU....There appears to be two antenna inputs on the Concert, one normal ISO connection and in the middle of the rear is a yellow square plug. [​IMG] Googling has lead me to believe this is called a "diversity antenna"? and the HU uses whichever is giving the best signal?? Or another forum suggested both antennae use the main input and the smaller ?fakra connection sends a signal back to the switching unit telling it which to use... OR some US sites simply describe them as FM and AM antenna.:uhm:
    Looking for aftermarket adapters has only lead me to adaptors for RNS-e retrofits.

    So can anyone tell me what I should be doing with this second lead? Just tie it back and forget about it? Will I get decent reception??
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