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Thread: GSXR error code -c28

  1. #1
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    16th September 2003 - 11:36
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    GSXR error code -c28

    Hi Guys

    Went to go for kb ride today, 20kms from home, notice red light on dash, and fi light on, pull over straight away. go over bike to see if anything wrong with the 600 there was plenty of oil etc in it

    So decided to limp it home, still plenty of power there, not missing or nothing

    Put it in dealer mode and i get c28

    With the manual i have it says it Seconday Throttle valve actuator.

    Can anyone tell me what this means?
    Would this have anything to do with the gsxr1000 pc3 thats been wired in to my bike about 2000kms ago.

    Cheers

  2. #2
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    29th January 2005 - 11:00
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    2006 Suzuki GSX-R750 K6
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    Try disconnecting the PC and see if the code comes up again. I had trouble with a PC on my K4 , was throwing C32 code, #1 injectoer. It turned out there was a problem with the PC. It was replaced, no further problems

  3. #3
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    26th April 2004 - 18:48
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    Quote Originally Posted by Cajun View Post
    Hi Guys

    Went to go for kb ride today, 20kms from home, notice red light on dash, and fi light on, pull over straight away. go over bike to see if anything wrong with the 600 there was plenty of oil etc in it

    So decided to limp it home, still plenty of power there, not missing or nothing

    Put it in dealer mode and i get c28

    With the manual i have it says it Seconday Throttle valve actuator.

    Can anyone tell me what this means?
    Would this have anything to do with the gsxr1000 pc3 thats been wired in to my bike about 2000kms ago.

    Cheers
    POWER ADAPTER FOR Power Commander III...

    C28 is pretty easy to trouble shoot mate. Go here http://www.81x.com/bugman/gixxermods and sort it

    whos a clever lad then

  4. #4
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    26th April 2004 - 18:48
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    Quote Originally Posted by Cajun View Post
    Hi Guys

    Went to go for kb ride today, 20kms from home, notice red light on dash, and fi light on, pull over straight away. go over bike to see if anything wrong with the 600 there was plenty of oil etc in it

    So decided to limp it home, still plenty of power there, not missing or nothing

    Put it in dealer mode and i get c28

    With the manual i have it says it Seconday Throttle valve actuator.

    Can anyone tell me what this means?
    Would this have anything to do with the gsxr1000 pc3 thats been wired in to my bike about 2000kms ago.

    Cheers
    C28, C29 and STPS adjustment c28 errors are common. You can pursure the checklist of items as shown in the service manual, but I would recommend doing something else first. A common source of a c28 error is actually not mentioned anywhere in the service manual: a miscalibrated STPS. Adjusting the STPS is easy, and will take you 10 seconds with a T25 torx screwdriver and a multimeter. You might expect a miscalibrated STPS to give you a c29 error, but that only happens if the sensor is broken or shorted out, not if it is miscalibrated.

    So if you're getting a "c28" error, BEFORE you do anything else, check the resistance at the STPS coupler and make sure it is 500 ohms on the nose. If that is correct and you're STILL getting the c28 error, then go down the checklist in the manual under "c28" below.

    If you hear a ratcheting, clicking sound after you turn the key in the ignition, and after the fuel pump primes the injectors (the normal machine-like sound you hear before you start the bike), then that ratcheting sound is telling you that you have to adjust your STPS.

    For instructions on investigating a c29 error, and pics and instructions on how to adjust your STPS, click on the link "c29 and STPS" below. Remember, MOST C28 ERRORS ARE CAUSED by a misaligned STPS, not by items you'll find in the manual under "C28". C29 and STPS adjustment C28 Manual Scan Both the STPS and the TPS use a T25 Torx screwdriver for their adjustment. This is the "special Suzuki tool" mentioned in the service manual. Get one at your hardware store for a few bucks.

  5. #5
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    16th September 2003 - 11:36
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    Quote Originally Posted by Pussy View Post
    Try disconnecting the PC and see if the code comes up again. I had trouble with a PC on my K4 , was throwing C32 code, #1 injectoer. It turned out there was a problem with the PC. It was replaced, no further problems

    can't discconect the pc3 it is hard wired in to the bike since its off a gsxr 1000 k4 not a gsxr 600

  6. #6
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    16th September 2003 - 11:36
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    Cheerys Glenn mate for the info.

    Will have to go down to workshop tomorrow and see what i can figure out, and find me a multimeter to

  7. #7
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    27th September 2005 - 12:58
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    i think it's become self aware, figured out it's a suzuki, and shat itself.
    Some things are worth dying for, living is one of them.

  8. #8
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    16th September 2003 - 11:36
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    Quote Originally Posted by Fatjim View Post
    i think it's become self aware, figured out it's a suzuki, and shat itself.
    Don't need any of that here please.

    This is my first problem with my bike in over 2 1/2 years and 30,000kms, and its not major since bike is not miss fireing or nothing along those lines.

  9. #9
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    26th September 2006 - 20:39
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    Quote Originally Posted by Fatjim View Post
    i think it's become self aware, figured out it's a suzuki, and shat itself.
    ahahah A.I gone wrong.
    I lost my licence and i havent riddin all month!!!- YEAH RIGHT

  10. #10
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    Couldn't get any ohms over the STPS sensor, got 5.1volts out of it tho, i think that might be the problem tho,

    Since the butterflys do sorta move, and from that bugmens site
    the line like the attached picture is the problem. So just gotta get a t25 torx screwdriver tomorrow to adjust it

    That site is simlar to the 600 nto total the same but by using that and printed service manual i got here i am semi working it out i hope
    Last edited by Cajun; 13th December 2006 at 13:34.

  11. #11
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    26th April 2004 - 18:48
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    Quote Originally Posted by Cajun View Post
    Couldn't get any ohms over the STPS sensor, got 5.1volts out of it tho, i think that might be the problem tho,

    Since the butterflys do sorta move, and from that bugmens site
    the line like the attached picture is the problem. So just gotta get a t25 torx screwdriver tomorrow to adjust it

    That site is simlar to the 600 nto total the same but by using that and printed service manual i got here i am semi working it out i hope
    Careful there mate that is the TPS you are talking about there you should be looking at the STPS according to buggy

    It dosent take much movement for the ohms reading to change

  12. #12
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    26th September 2005 - 14:25
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    Got TP for bunghole?

    Hope yours isnt as hard to fix as mine is....im looking at another gearbox rebuild
    Built for speed, not for comfort

  13. #13
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    16th September 2003 - 11:36
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    another gearbox didn't you only just do that?
    be cheaper to buy a new bike by now would it not?

  14. #14
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    14th February 2004 - 12:00
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    Dont no if ya tried this, but this is the info i have on it.
    Attached Files Attached Files
    Those who dont learn from history, are doomed to repeat it.

  15. #15
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    16th September 2003 - 11:36
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    Another play with a couple of ideas this afternoon

    and i think the STPS is stuffed )c: <

    i can't get any ohm reading off it. Tired a couple of other things. no lucky

    Hopeful have a professional look at it for me tomorrow to confirm my theory.
    Last edited by Cajun; 13th December 2006 at 13:34.

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