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Thread: Vtwin light is on...

  1. #1

    Vtwin light is on...

    07' XB12S...Between 1st and 3rd she seems to be rough. Like she wants to go fast but then wants to start to die. It never does die but it just doesn't seem right. It has 27,000 miles and it's new to me. Any thoughts before I take it in to see what's up? Can any mechanic read the codes on it?

  2. #2
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    It never does die but it just doesn't seem right.
    then it probably isn't "right".
    It has 27,000 miles and it's new to me.
    a buell at that mileage typically needs a complete refreshening by someone who not only completely understands buells but is qualified from prior experience and expertise to do the work.
    Can any mechanic read the codes on it?
    no! it's called the CHECK ENGINE LIGHT. the common acronym is CEL. it is illuminated because you not only have an abundance of stored historical fault codes....but you presently also have a fault/problem with the bike that is activating said light.

    YOU cannot clear the codes with the below method but YOU can read the codes and determine the problem using this:

    First thing to do is locate your diagnostic test plug under the seat. It's an empty four pin connector. If you're looking at it with the pins facing you and the locking tab at the 12:00 position, the pins are numbered as follows:

    Pin 1 -- upper right corner
    Pin 2 -- lower right corner
    Pin 3 -- lower left corner
    Pin 4 -- upper left corner

    With the ignition switch off, install a jumper wire across pins 1 and 2 in the diagnostic plug.

    Turn the ignition switch to the ON position and wait approximately 8 seconds for the check engine light to start flashing.

    All trouble codes are sent out as a series of flashes. To rettrieve the first digit of the code, simply observe the number of times the lamp flashes.

    The transmission of a trouble code is always preceeded by six rapid flashes (about 3 per second). This transmission is followed by a 2 second pause in which the lamp is off. The lamp will then flash one or more times to indicate the first digit of the trouble code. The length of time that the lamp will be either on or off when indicating a trouble code is about 1 second in duration.

    Following the transmission of the first digit in the trouble code, there will be another two second pause before the second digit is transmitted.

    After the second digit is transmitted, there will be another 2 second pause. After the pause comes another intermission (six rapid flashes) after which the next stored code is transmitted in the same manner. Once all the trouble codes have been displayed, the sequence will repeat.

    If all you observe is the rapid flashing, then no trouble codes have been stored.

    When done, turn the ignition key off and remove the jumper wire.

    There is no way to clear trouble codes using this method. The only way to clear codes without hooking the bike up to a computer is to take the bike through 50 start and run cycles (start engine, run for at least 30 seconds, shut it off).

    The trouble codes are as follows:

    11 Throttle position sensor
    13 Oxygen sensor
    14 Engine temperature sensor
    15 Intake air temperature sensor
    16 Battery voltage
    21 Interactive muffler control (XB12 only)
    23 Front fuell injector
    24 Front ignition coil
    25 Rear ignition coil
    32 Rear fuell injector
    33 Fuell pump
    35 Tachometer
    36 Cooling fan
    44 Bank angle sensor
    52, 53, 54, 55 ECM failure
    56 Cam sync failure

    and you're welcome!
    Last edited by user_deleted; 08-24-2017 at 11:46 AM.

  3. #3
    Thank you kind sir! Spark plugs were bad

  4. #4
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    I hate when that happens !

  5. #5
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    Quote Originally Posted by LandonJarrett View Post
    Thank you kind sir! Spark plugs were bad
    my pleasure

  6. #6
    Senior Member MakingPAIN's Avatar
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    Good info right there and I don't even need it. Saved it for later use. Thanks bud.



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