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  1. #1
    steach's Avatar
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    Stepping Motor code54

    I get a check enging light and a code 54 "Stepping Motor Malfunction" on '06GPR but the performance does not seem to suffer. It comes on at some point in a run; most of the time but not allways.

    I've unplugged, diElec greeced and repluged the connection at the throt bodies.(thanx to Shibbys monkey arms...CLICK)

    Q1: What the F#*$ is a Stepping Motor?

    Q2: Do I need parts or is there a "passive" resistor to fool the ECU?

    Thanx,
    Erin


  2. #2
    Moderator RX951's Avatar
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    If I am not mistaken, I beleive it helps control the idle..............I think thats what WFO told me.
    when I did that EFi conversion, I looked over that TB assembly well and I remember seeing that stepping motor has a little nub that pressed against one of the throttle tabs where the spring attached between #2 & #3 throttle bodies. It presses on it to help keep the ski at the proper idle.
    * The ECU controls the stepper motor output for the opening of the throttle body butterflies to maintain the proper idle.


    THROTTLE BODY ASSY.

  3. #3
    steach's Avatar
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    Quote Originally Posted by RX951 View Post
    If I am not mistaken, I beleive it helps control the idle..............I think thats what WFO told me.
    The idle is at 1200 cold and 1100 hot if the warning is on or not.

  4. #4
    steach's Avatar
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    TTT bumpity,

    Any thoughts?

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