How to fix faulty airflow button

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by metamorphosis, Feb 23, 2026.

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  1. metamorphosis

    metamorphosis Junior Member

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    Hi all-
    the steering wheel button which switches between incoming and recirculated air is busted, either doesn't fire, occasionally fires, mostly misfires (sends the wrong code, ends up switching the touchscreen to powerflow/efficiency screen). All other buttons, and the horn, work fine.

    Where to start?

    [​IMG]
    [​IMG]

    (Yes the steering wheel is upside down in the photo)
     
    #1 metamorphosis, Feb 23, 2026
    Last edited: Feb 23, 2026
  2. dolj

    dolj Senior Member

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    Do the symptoms change if you turn the steering wheel? I would try testing it by rotating the steering wheel in 30º intervals and see if it works correctly in certain positions. Test it from full lock left to full lock right, preferably with the front wheels lifted off the ground so the steering gear is not being stressed. If you find that it works correctly in certain positions, it is likely the clock-spring cable has a break in the in one (or more) of the tracks of the ribbon cable.
     
    #2 dolj, Feb 24, 2026
  3. ChapmanF

    ChapmanF Senior Member

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    I don't have the wiring diagram in front of me, but often the setup is several buttons sharing one signal circuit by grounding it through different resistances, so a change in the resistance of the circuit (maybe a partial break in the spiral cable, or a deteriorating connection somewhere) would make one button read as a different one.

    It might be enlightening to look in the diagram, specifically what it shows for that button and for the other button it's being read as.
     
    #3 ChapmanF, Feb 24, 2026
  4. metamorphosis

    metamorphosis Junior Member

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    Yes, it works at 30º off-center in either direction, but not when centered. Thanks for that, is there a guide somewhere to fixing/replacing the clock-spring cable? And am I likely to end up with an airbag exploding in my face.
     
    #4 metamorphosis, Feb 24, 2026
  5. metamorphosis

    metamorphosis Junior Member

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    Thanks, BTW I just saw your reply on my (same topic) thread last year - unfortunately for some reason I didn't get email notifications.
     
    #5 metamorphosis, Feb 24, 2026
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