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Active grill shutter problem U028487

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by turbo1, Aug 17, 2020.

  1. turbo1

    turbo1 Junior Member

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    hello friends my car gave me a little surprise today, everything was working fine but suddenly check engine lights comes on, when i checked it was DTC u028487 . it had a little problem with grill shutter in past, it was wiring connection problem but i type it as it should be and everything was working fine during 1 year. today i removed the bumper and check wiring connection again to make sure it has not short, but everything was looking good. any ideas? is there any kind of fuse for grill shutter? when i am cleaning the DTC it comes again in 5 seconds.
     
    #1 turbo1, Aug 17, 2020
  2. bisco

    bisco cookie crumbler

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    there may be a recall, check with a dealer.
    what are you driving btw, your vehicle says 2013
     
    #2 bisco, Aug 17, 2020
  3. turbo1

    turbo1 Junior Member

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    its 2016 prius, i don't know if it has some kind of fuse that's giving power to grill. is there any way to bypass active grill? also its very strange, i have not used the car for a while everything was working ok. few times 12v battery drained and i jumped the car, could it blown some fuse i dont know
     
    #3 turbo1, Aug 18, 2020
  4. bisco

    bisco cookie crumbler

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    nothing in the o/m?
     
    #4 bisco, Aug 18, 2020
  5. turbo1

    turbo1 Junior Member

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    today i checked fuses all fuses are ok. also i checked connector wires and it has 12v on it. i think shutter motor died
     
    #5 turbo1, Aug 19, 2020
  6. bisco

    bisco cookie crumbler

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    maybe something jammed. is there a way to disconnect it and see if the shutters move?
     
    #6 bisco, Aug 19, 2020
  7. turbo1

    turbo1 Junior Member

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    should it move with hands freely? it stucks open
     
    #7 turbo1, Aug 19, 2020
  8. bisco

    bisco cookie crumbler

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    if it were disconnected from the motor armature, and you couldn't move it, it would be because something is binding it
     
    #8 bisco, Aug 19, 2020
  9. turbo1

    turbo1 Junior Member

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    i just checked and it moves, but i cant turn motor head itself its stuck
     
    #9 turbo1, Aug 19, 2020
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  10. turbo1

    turbo1 Junior Member

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    is there any way to bypass grille shutter? may be there is some way to connect wires together, and start the car without check engine light
     
    #10 turbo1, Aug 19, 2020
  11. turbo1

    turbo1 Junior Member

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    what i have notice is the shutter wings were always in open position, may be there was some kind of dirt on it i dont know. also when i removed the motor itself and conected just a motor check engine light still comes on. friend told me shutter motor may be working but it should be inserted to the shutter, separately connected is will not work did you know anything about that?
     
    #11 turbo1, Aug 20, 2020
  12. bisco

    bisco cookie crumbler

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    no, i don't know anything at all about auto grill shutters. you would probably have to rent the manual
     
    #12 bisco, Aug 20, 2020
  13. stevelawsn

    stevelawsn Junior Member

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    There is a potentiometer in the motor housing that reports the shutter position to computer. It can stick endnote give accurate position information that then trips the alarm.
     
    #13 stevelawsn, Sep 14, 2020
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