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How to jump fuel pump relay on 02 Toyota Tacoma 3.4

Discussion in '1st Gen. Tacomas (1995-2004)' started by Mannyniihau, Jun 19, 2022.

  1. Jun 19, 2022 at 9:25 AM
    #1
    Mannyniihau

    Mannyniihau [OP] New Member

    Joined:
    Jun 19, 2022
    Member:
    #399697
    Messages:
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    Gender:
    Male
    First Name:
    Manny
    Vehicle:
    2002 Toyota Tacoma 3.4 4x4
    Aloha Toyota fam. Any thought or advice on how to jump a fuel relay to see if I have a bad fuel pump or a bad relay. I have a 2002 Toyota Tacoma 3.4, it turns over but it won’t run/start.

    truck been sitting for 5 months and I’m guessing it’s the fuel pump. Or is there any way I can disconnect a fuel line to see if fuel shoots out.?

    Thoughts and advice pls

    Mahalos
     
  2. Jun 19, 2022 at 10:51 AM
    #2
    Bivouac

    Bivouac Well-Known Member

    Joined:
    Sep 5, 2021
    Member:
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    Messages:
    11,579
    Northern Lehigh Valley Pa
    Vehicle:
    2000 Tacoma 5 speed 3.4
    Remains to be seen I bought the tires and wheels the rest came along
    The battery has been charged or you have the charger on while cranking?

    The fuel pump will only energize while cranking or with the engine running.

    You have the EFI relay and the Circuit opening relay both can be tested .

    Why was the truck parked ? It quit and sat till now? Did the MIL trip and was the code pulled ?

    Find a copy of the EWD or maybe someone knows the color of the wire in the connector under the drivers seat of the wire going to the pump .

    I don`t recommend pulling a fuel line to test for pressure as you have no idea if the injectors are working like they should.
     
  3. Jun 19, 2022 at 6:38 PM
    #3
    Tbrad7128

    Tbrad7128 Well-Known Member

    Joined:
    Jun 18, 2022
    Member:
    #399663
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    Male
    First Name:
    Tyler
    Boerne Texas
    Vehicle:
    2003 Tacoma 3.4 v6 TRD double cab 4x4 elock
    If you suspect a relay just swap the relay with another same type under hood. Should be 3 that size
     

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