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Car won't go into run mode.

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by mypriuscious, Jun 5, 2015.

  1. mypriuscious

    mypriuscious Member

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    The car sees the key and let's me put it into acc mode and on but won't go into run mode. It is seemingly not recognizing the press of the brake. Would the brake lights come on if I press the pedal when it is in on mode? Because they don't but I think they should. Honestly can't remember.
     
    #1 mypriuscious, Jun 5, 2015
  2. fuzzy1

    fuzzy1 Senior Member

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    The brake lights should come on regardless of ignition mode, including Off. Is the brake light switch still working?
     
    #2 fuzzy1, Jun 5, 2015
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  3. mypriuscious

    mypriuscious Member

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    I'm not entirely sure. Do You know how I would test that?
     
    #3 mypriuscious, Jun 5, 2015
  4. xliderider

    xliderider Senior Member

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    It sounds like the brake switch behind the brake pedal is either out of adjustment, or defective. You can try pressing the brake pedal down several times etc. However, some people have intermittent problems making the car Ready from this problem with the brake switch.
     
    #4 xliderider, Jun 5, 2015
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  5. mypriuscious

    mypriuscious Member

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    Another thing that I don't think I noticed before when pressing the on button the first time is that a large triangle with exclamation mark comes up underneath the traction control button. Is that normal?
     
    #5 mypriuscious, Jun 5, 2015
  6. RRxing

    RRxing Senior Member

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    The brake lights should come on whenever the brake pedal is depressed, regardless of what mode the car is in, including OFF. Check that first. If the brake lights don't come on, the brake switch behind the pedal is suspect, as mentioned. If the brake switch is faulty, that "may" be giving you the triangle light.
     
    #6 RRxing, Jun 5, 2015
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  7. mypriuscious

    mypriuscious Member

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    Well, I took the time to check the fuses. It seems that the #14 fuse is blown which is the brake lights. I didn't have any of the micro fuses and I pulled one to test 14 which caused another problem. The dash won't come on, or the main display except for the check engine light and another light which I forget. I purchased some fuses so when I get back home I'll replace the 14.
     
    #7 mypriuscious, Jun 5, 2015
  8. bisco

    bisco cookie crumbler

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    could a bad bulb cause the fuse to blow?
     
    #8 bisco, Jun 5, 2015
  9. mypriuscious

    mypriuscious Member

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    I put the fuse back in the wrong place causing the display to go out.

    I was working to get a wire through the fire wall for foglights and I kept touching the brake pedal and I guess that blew the fuse.
     
    #9 mypriuscious, Jun 5, 2015
  10. mypriuscious

    mypriuscious Member

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    First of all, thanks for all your help! I've got one more problem needing to be resolved.

    Traction control light, ABS light, and this symbol ((!)) Along with low pressure light are all on. Low pressure I can handle, but what about these others?

    They were not on before.
     
    #10 mypriuscious, Jun 6, 2015
  11. xliderider

    xliderider Senior Member

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    How old is your 12v auxiliary battery? Sounds like it's low, that's when all kinds of warning lights come on.
     
    #11 xliderider, Jun 6, 2015
  12. mypriuscious

    mypriuscious Member

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    prob as old as the car. Would the brake fuse blowing cause the abs light to come on?

    I took it for a drive last night and the brake regeneration wasn't coming on to recharge the battery, does the ABS light have anything to do with that?
     
    #12 mypriuscious, Jun 6, 2015
  13. mypriuscious

    mypriuscious Member

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    Can anyone confirm that the fuse blowing and me unplugging the brake light sensor caused these lights to come on?
     
    #13 mypriuscious, Jun 6, 2015
  14. bisco

    bisco cookie crumbler

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    why not disconnect the 12v for a few minutes and see what happens?
     
    #14 bisco, Jun 6, 2015
  15. mypriuscious

    mypriuscious Member

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    It hasn't worked yet. And I've read the gen II is only reset by the dealer. And not much is posted about it here for the Gen III
     
    #15 mypriuscious, Jun 6, 2015
  16. bisco

    bisco cookie crumbler

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    gotcha.
     
    #16 bisco, Jun 6, 2015
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