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C/OPN Relay not Operating

Discussion in '2nd Gen Tundras (2007-2013)' started by Lumpycorn, Jun 5, 2020.

  1. Jun 5, 2020 at 1:25 PM
    #1
    Lumpycorn

    #1
    Lumpycorn [OP] New Member

    Joined:
    Apr 30, 2017
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    Hi All,

    The C/OPN relay is not closing. The control for this relay comes from the ECU. Are there any ECU input conditions that would prevent the computer from closing the relay? I'd like to check those before buying an ECU.

    Thanks in advance!
    Tim
     
    Lumpycorn, Jun 5, 2020
    #1
  2. Jun 6, 2020 at 9:33 PM
    #2
    stomachbuzz

    #2
    stomachbuzz New Member

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    Matt
    if you're going to jump at buying a replacement ECU that fast, it might be worth the time to test the relay itself first lol
     
    stomachbuzz, Jun 6, 2020
    #2
  3. Jul 19, 2022 at 10:15 PM
    #3
    GDON1976

    #3
    GDON1976 New Member

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    Where is the C\OPN relay located?
     
    GDON1976, Jul 19, 2022
    #3
  4. Jul 20, 2022 at 7:40 AM
    #4
    Jeff_5_7

    #4
    Jeff_5_7 New Member

    Joined:
    Feb 20, 2021
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    #59378
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    First Name:
    Jeff
    Houston Tx Area
    Vehicle:
    2007 RCSB 2014+ TRD Pro Conversion 5.7 4x4
    Full 2014+ Conversion Regular Cab Short Bed 4X4 2019 TRD Pro Grill, 2014+ Front End Swap 2014+ Interior/Dash Swap with TRD Pro Leather Seats, 2014+ Bed Swap with TRD Pro Stamping SOS 2/4 Drop Kit
    Engine Fuse box #6 according to this. It is the Circuit opening relay that powers the fuel pump

    upload_2022-7-20_9-40-3.jpg
     
    Jeff_5_7, Jul 20, 2022
    #4
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