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Thread: 09 R1200RT (K26) - Error Code: A303 Brake light

  1. #1

    09 R1200RT (K26) - Error Code: A303 Brake light

    New Friends,
    I purchased an 09 BMW R1200 RT (K26), and it is throwing a Fault Code (A303). I found the Fault code using MotoScan, and checked http://bmwfault.codes/ for more details. It is all very generic information. Does anyone have additional wisdom that could help me resolve this error?

    Trouble Code: A303
    Error Rate: 1
    Battery Voltage: 11.92 Volt
    No Signal or Value: 04
    Test Condition Met: 10
    Error Present and already stored: 23
    Error Caused Warning Lamp to Illuminate: 31

    I do have the BMW Motorrad Service manual, but I did not find anything related to diagnosing the error.

    Thank you

  2. #2
    Liaison 20774's Avatar
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    Welcome to the forum! I haven't seen a listing from Motoscan of these codes, but the fault code look up you mentioned indicates it's associated with the brake light. Beyond that, I don't think I can help much. Maybe dig into the brake light and make sure it works and/or check the bulb grounds.

    Hopefully someone else who has experienced this will drop by for some other ideas.
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  3. #3
    Fortis Fortuna Adiuvat Omega Man's Avatar
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    Battery voltage seems low. Some hold the brake lever on while starting? Age of battery?
    Welcome to the forum!
    Let us know how you make out.
    Gary
    "You can do good or you can do well. Sooner or later they make you choose." MI5
    Mod Squad
    2009 F800GS 1994 TW200

  4. #4
    Quote Originally Posted by Omega Man View Post
    Battery voltage seems low. - Gary
    Thanks for the feedback, what target should the voltage be?

    I will take the lights off again and see if I can find anything that doesnt look right, and let you know. THanks.

  5. #5
    Fortis Fortuna Adiuvat Omega Man's Avatar
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    A good “next morning” reading would be 12.7v or so. If the battery voltage drops past 10v while cranking, it has an effect and can lead to odd codes. These bikes ask a lot of the small(ish) batteries.
    OM
    "You can do good or you can do well. Sooner or later they make you choose." MI5
    Mod Squad
    2009 F800GS 1994 TW200

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