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Thread: '16 RF - service light, no codes - solved

  1. #1
    apriliaforum prov-nov KnoxRider's Avatar
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    '16 RF - service light, no codes - solved

    2016 RSV4 RF
    10,000 miles

    pulled a "SERVICE" light and message.
    • Checked the onboard diagnostics, no codes.
    • Cleared dash codes, no help.
    • Cleared coupons, this worked, but issue came back again about 50 miles later.
    • Cleared several more times, mileage between messages decreased to about 5 miles


    Noticed the exhaust "ex-up" valve was twitchy during power up. Realized the system is trying to cycle that valve, and it's not moving properly. I was on the road, so did some rev'ing trying to get the valve moving better, and blow out anything stuck. After a bit, turned off, restarted, and the message was cleared and stayed cleared

    So just need to take off the side panel, check movement, lube, etc.... but very glad it was a simple issue


    Cliff notes - if you pull a solid SERVICE light but no codes with the onboard diagnostics, this **might** be a cause

  2. #2
    apriliaforum Member Darth Vader's Avatar
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    Onboard dash diagnostic CAN NOT SEE any ECU or ABS or APRC codes .... cleared coupone is just service reminder, spanner icon, and has no effect on any system on the bike...
    Ex up valve is normally opening and closing during power up... it is self checking operation and if its movement is reduced or too excessive it will trigger the code on the dash...so maybe you got lucky guess...

    In any case, currently inactive error code or codes are written in the ECU memory and can be checked and cleared with diagnostic tool PADS .. recomending PADS because it only has access to ALL systems on the bike...

  3. #3
    apriliaforum expert plocky's Avatar
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    Quote Originally Posted by Darth Vader View Post
    In any case, currently inactive error code or codes are written in the ECU memory and can be checked and cleared with diagnostic tool PADS .. recomending PADS because it only has access to ALL systems on the bike...
    Actualy IAW/Guzzidiag is very useful for diagnostics for those that want to trouble shoot on their own or have no access to a Tech with PADS.
    The error codes are able to be read & cleared, they just aren't as detailed. Seee tomik's explanation below.

    Quote Originally Posted by tomik View Post
    On an APRC bike with CLF ECU you will see the same P0501/P0502 errors as you with Guzzidiag. Those get passed to the main ECU fault log from the CLF ECU (or ABS module) through CAN bus. But the CLF ECU and also ABS module have their own diagnostic bus, error memory, and diagnostic modes. Those you cannot access with Guzzidiag. So how it works is that if CLF ECU or ABS module sees a fault, it notifies main ECU that for example there is something wrong with the front wheel speed sensor and main ECU logs P0501. But when you go to the CLF ECU diagnostic you will see more details what is wrong.

    Examples from the service manual (in any of these errors you would only see P0501 on Guzzidiag):

    DIAGNOSIS INSTRUMENT: LOGIC ERRORS
    C1100 Front speed sensor: missing signal or speed measured too low in relation to the rear wheel.
    Faulty sensor or missing tone wheel or excessive distance between the sensor and the tone wheel or tone wheel with wrong number of teeth.
    C1102 Front speed sensor: missing signal or speed measured too low in relation to the rear wheel.
    Faulty sensor or missing tone wheel or excessive distance between the sensor and the tone wheel or tone wheel with wrong number of teeth.
    C1104 Front speed sensor: missing signal or different speed measured at the two wheels. Faulty sensor or missing tone wheel or excessive distance between the sensor and the tone wheel or tone wheel with wrong number of teeth.
    C1106 Front speed sensor: missing signal or different speed measured at the two wheels. Faulty sensor or missing tone wheel or excessive distance between the sensor and the tone wheel or tone wheel with wrong number of teeth.
    C1108 Front speed sensor: the signal works irregularly.
    Faulty sensor or signal interference
    C1110 Front speed sensor: the signal decreases periodically.
    Possible tone wheel fault due to deformations or dirt; possible alterations on the wheel bearing surface. In very rare cases, abnormal tone wheel vibrations.
    2015(16) RSV4 RR Ascari Black 201HP

  4. #4
    apriliaforum Member Darth Vader's Avatar
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    Quote Originally Posted by plocky View Post
    Actualy IAW/Guzzidiag is very useful for diagnostics for those that want to trouble shoot on their own or have no access to a Tech with PADS.
    The error codes are able to be read & cleared, they just aren't as detailed. Seee tomik's explanation below.
    yes... I know all of that...and I agree that Guzzidiag is excellent first aid device, but all that guessing can lead to wrong conclusion...

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