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Trailer Not Recognized

Discussion in 'Towing & Hauling' started by M&MTundra2018, May 11, 2020.

  1. May 11, 2020 at 9:58 AM
    #1
    M&MTundra2018

    M&MTundra2018 [OP] New Member

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    Appreciate anyone who can offer assistance with this problem.
    2018 Boat trailer is not recognized by the Toyota integrated brake controller. Trailer lights all work 4.0, but I cannot adjust the trailer brakes at all because Tundra display shows "no trailer connected." Multiple other trucks have no issue with the boat trailer, so it seems like the problem is with my 2018 Tundra Limited.

    Local dealership looked at vehicle but couldn't find any issues. Second dealership said it might be a blown fuse but couldn't tell me which one...Does this sound like a TSB 0036-19 issue?

    Shouldn't be this hard! Thanks for any feedback.
     
  2. May 11, 2020 at 10:08 AM
    #2
    Jim LE 1301

    Jim LE 1301 Camaro Lover, SSEM # 11,TTC#179

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    Welcome from NY.

    I remember someone posting the same issue about 1 year ago. Try the search bar. Good luck with correcting the issue.
     
    M&MTundra2018[OP] likes this.
  3. May 11, 2020 at 10:10 AM
    #3
    hagrid

    hagrid The most diverse of Diversity Hires!

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    paynuss stretchers
    I had my dealer update the firmware. Fixed.
     
  4. May 13, 2020 at 5:06 AM
    #4
    stuckinohio

    stuckinohio MGM Crue

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    Check your trailer ground. I have had issues since my trailer grounds through the ball hitch. Also, shutting truck off, plug trailer in then start up may help.
     
  5. May 13, 2020 at 5:12 AM
    #5
    M&MTundra2018

    M&MTundra2018 [OP] New Member

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    Thanks @stuckinohio I'll try both - truck at second dealership now for hopefully the reflash fix of the firmware - not optimistic.
     
  6. May 13, 2020 at 5:52 AM
    #6
    stuckinohio

    stuckinohio MGM Crue

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    No problem hope you get it straightened out. Since my trailer grounds through the ball it doesn't provide a consistent ground and makes the Toyota IBC go crazy. I plan to rewire my trailer harness eventually but have been running a jumper wire to help ground to the truck frame better. It's not the ideal solution but allows me to be legal and not get rear ended.

    Is your boat trailer a 7pin or a 4 pin?
    Does the trailer have brakes?
     
  7. May 13, 2020 at 5:55 AM
    #7
    M&MTundra2018

    M&MTundra2018 [OP] New Member

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    Trailer has trailer brakes and is a 7 pin. New trailer (2018) so it might be the LED/resistance issue I've seen on this thread earlier.
    But, the trailer ground is always a good place to start t/s. Will let you know how I make out - appreciate the help.
     
    NewImprovedRon likes this.
  8. May 13, 2020 at 11:30 AM
    #8
    M&MTundra2018

    M&MTundra2018 [OP] New Member

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    Dealer performed the ECU re-flash with the TSB 0036-19 - no joy - still not recognized.
    Trying the 7 way adaptor next and if that fails the Prodigy RF.
     
    NewImprovedRon likes this.
  9. Jun 29, 2021 at 7:57 AM
    #9
    Benjammann

    Benjammann New Member

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    Did you find the problem? I'm having the same issue trying to rewire a trailer and the truck says "no trailer"
     
  10. Jun 29, 2021 at 10:17 PM
    #10
    thearborbarber

    thearborbarber New Member

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  11. Mar 24, 2022 at 11:46 AM
    #11
    Ry24000

    Ry24000 New Member

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    Any updates on this? Mine says no trailer and I can't change the Trailer brake type in the settings menu.
     
    Last edited: Mar 24, 2022
  12. Apr 2, 2022 at 10:50 AM
    #12
    rdiddy5

    rdiddy5 New Member

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    there are issues w/ 2018 models, maybe others that require the dealer to flash/update the controller ecu.

    Trailer Disconnected Message When Towing.
    Research Indicates T-Sb-0036-19 Will Solve The Issue.

    Had that performed at the dealer and have been all good since.
     
  13. Dec 20, 2023 at 6:18 PM
    #13
    Ry24000

    Ry24000 New Member

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    Did you figure anything out or what?
     

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