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  1. #1
    JPD125's Avatar
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    RNSE Draining car battery?

    Hi all, looking for an electrical/RNSE expert please!

    I currently own a 8P S3 which I have had for last 4 years. The car as standard came with RNSE/Bluetooth/Steering wheel controls.

    The problems started approx 3 weeks ago after 4 years faultless service from the car. Initially the RNSE telephone function stopped working with the message "Telephone not available" displayed when you pushed the TEL tab at the bottom of the screen. The steering wheel function buttons also stopped working (the speech and mode buttons) and my telephone no longer connected to bluetooth (no connection bongs etc).

    Initially I though the problem was with a software/coding issue, but then found that overnight the cars battery was going flat. Since the car was going in for service, i got them to change the battery as it was pretty tired.

    The following day the battery was dead again. The AA came out and got me jump started but following a bit of diagnosis he confirmed that even with the ignition off and all lights etc off there was still a 2.4 amp drain on the battery?.

    Took the car to the local audi specialist( russells automotive - V good guys btw) who confirmed that if they disconnected the RNSE, the power drain disappeared.

    So the exam question, Whats the problem?. Obviously disconnecting the unit cures the problem but is not a long term solution although does provide a useful storage space in the dashboard!

    Given the RNSE unit functions perfectly apart from the telephone function I am starting to think that maybe the bluetooth module is somehow at fault? I would hate to replace the RNSE to find it wasnt that all along. Is there a way to disconnect the BT module and see if that makes a difference?

    Any help or advice greatly received, beers in it for whoever can help!

    Thanks for reading and Merry Xmas!
    Phantom Black S3 - most options ticked!

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  3. #2
    s8craig's Avatar
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    It is your bluetooth module and not the RNS-E.

    Replace the BT module with the latest one.

  4. #3
    JPD125's Avatar
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    Thanks for the reply craig. Any idea if this AUDI A3 INTERFACE BOX FOR HANDSFREE 8P0862335S 04-2009 | eBay would be ok.

    Is it just a simple case of unplug old one, insert new or will it need coding?
    Phantom Black S3 - most options ticked!

  5. #4
    s8craig's Avatar
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    It should be ok, but may need coding, depends if it has come from a car with RNS-E or concert/symphony

  6. #5
    JPD125's Avatar
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    On a side note, is there a fuse in the car anywhere that controls power to the bluetooth module?. Just keen on killing the power to it for the time being until I source a replacement.
    Phantom Black S3 - most options ticked!

  7. #6
    s8craig's Avatar
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    I think if you open the right side panel you will see the fuse box and the TEL fuse should be labelled

  8. #7
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    Hi Every1,, i'm Very new to this And am in desparate need of some help - i too have the same problem as JPD125. after spending over £600 trying to establish why i kept having a flat battery, i have now been told by the AA that it's the bluetooth module (if only i'd joined this forum earlier)

    Well, this problem i'm having now is Actually Locating where this module is, and what does it look like exactly ?!?!?

    Can Anybody help ??????

  9. #8
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    Hi, If it is a factory fit, it will be in a black box underneath one of the front seats, I forget which one, think its passengers, sure someone on here will correct me if I'm wrong!. If it is a non-factory fit it will either be behind the RNS-e or on top of the glove box.

    It's a silver box with the antenna sticking out of it at right angles.

    AUDI Bluetooth KIT RNS-E Symphony 8P1862335 8P1 862 335 | eBay

    Audi Bluetooth Interface New Genuine Retrofit kit RNS-E A3 TT A4(B7) R8 etc | eBay

    Audi Bluetooth Module Interface | eBay


    here is some pictures of the full set.
    hope that helps

  10. #9
    NHN
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    Its under the rhd passenger seat as said in a black box if factory fitted.

    If yours is goosed, give me a shout as I have a 2nd user unit for sale.

    OEM RETROFITS - CRUISE CONTROL - SAT NAV - BLUETOOTH - AMI - HEADLIGHT SYSTEMS

    PARKING SYSTEMS - DIAGNOSTICS - FAULT FINDING - BODYWORK - PAINTWORK

 

 

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