Check Engine Light Code P1685

Discussion in 'Speed Triple' started by glenn smith, Jan 16, 2025 at 7:35 PM.

  1. glenn smith

    glenn smith New Member

    Dec 13, 2024
    13
    3
    CALIFORNIA
    To all thats been following my post bellow ..after the third cold start the check engine light was still on...i have a Bosch 1200 scanner that i use for our autos...i blew my mind when it was comunicating with the bike ecu.... found code P1685.... I removed the code and check engine light is off...what i dont understand is this started after removing battery terminals etc
     
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  2. glenn smith

    glenn smith New Member

    Dec 13, 2024
    13
    3
    CALIFORNIA
    Found this...
    The code refers to the ECU relay that lives under the seat. Have a look at it and see that it's seated and plugged in correctly. The code can also come up if fuse number 5 is faulty or has a faulty connection. It's labelled as "ECM relay" on this photo:
    And this
    On a 2014 Triumph Speed Triple R, code P1685 typically indicates a fault related to the "Throttle Position Sensor (TPS)" circuit, signifying that the motorcycle's computer is not receiving a proper signal regarding the throttle position, potentially leading to issues with engine performance and fuel delivery.
     
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