Controls quit working

Discussion in 'Gen 3 Prius Technical Discussion' started by Jason Beauchamp, Dec 3, 2020.

  1. Jason Beauchamp

    Jason Beauchamp New Member

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    I have a 2012 Prius and the steering wheel controls just quit working and the buttons don’t even light up when the lights are on. Is there a fuse that would affect that or any other ideas?
     
  2. Pluggo

    Pluggo Senior Member

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    Is there a fuse? Yes. Absolutely everything electrical always has a fuse somewhere in the car.
     
  3. jerrymildred

    jerrymildred Senior Member

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    It could also be the clock spring cable. It does seem a little odd to me that everything would quit at once. That would take some doing, but if something came unplugged it could happen.

    As @Pluggo said, everything is protected by fuses, but if the things the steering wheel controls operate using other controls, the kind of rules out all those fuses and no other blowing at once.

    This thread might help. 2010 Prius Clock Spring Replacement | PriusChat
     
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  4. Jason Beauchamp

    Jason Beauchamp New Member

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    [thanks for the input I’ll check that
    QUOTE="jerrymildred, post: 3100897, member: 149132"]It could also be the clock spring cable. It does seem a little odd to me that everything would quit at once. That would take some doing, but if something came unplugged it could happen.

    As @Pluggo said, everything is protected by fuses, but if the things the steering wheel controls operate using other controls, the kind of rules out all those fuses and no other blowing at once.

    This thread might help. 2010 Prius Clock Spring Replacement | PriusChat[/QUOTE]
     
  5. pcortes

    pcortes Junior Member

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    Hi Jason,

    There's a "IGN" fuse that powers the micro-controller that operates the touch sensors on the steering pad switch that you could check. As for why a clock spring might cause all functions to fail at the same time, there are only a couple of wires for the pad switches that go through the clock spring for each set of switches. Each switch routes the wires through a different resistor, so the the control unit can tell which switch is being pressed, even though there's not a set of wires for each switch. If only one wire breaks, all function is lost for the set of switches.

    The clock spring (spiral cable) is a pretty good guess based on the symptom, but it's better to test than guess. The part is over $600 from Toyota, but there are clones on Amazon for about $80. Search the part number 84307-47020 on Amazon or EBay.
     
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