1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Why does Truck "self diagnose" fuel system?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by swise, Oct 22, 2009.

  1. Oct 22, 2009 at 10:00 AM
    #1
    swise

    swise [OP] TRIFECTA!!!

    Joined:
    Oct 22, 2009
    Member:
    #24716
    Messages:
    371
    Gender:
    Male
    ohio
    Vehicle:
    08 4x4 dbl cab, TRD offroad
    Walked into garage last night and heard relays on truck clicking and fuel pump or something running by themselves. It had not been running for hours and I read somewhere in manual this was normal, but what happens when it decides the test is unsuccesful - will it start the next day? What is it really doing at night all alone in my garage?
     
  2. Oct 22, 2009 at 10:05 AM
    #2
    NraFan

    NraFan Join the NRA! Protect your freedom!

    Joined:
    Sep 13, 2009
    Member:
    #22703
    Messages:
    1,568
    Gender:
    Male
    First Name:
    JT
    SoCal
    Vehicle:
    2011 Sienna LE, rockin the mini van!
    Power sliding doors baby! WooHoo!
    Gremlins!
     
  3. Oct 22, 2009 at 10:07 AM
    #3
    swise

    swise [OP] TRIFECTA!!!

    Joined:
    Oct 22, 2009
    Member:
    #24716
    Messages:
    371
    Gender:
    Male
    ohio
    Vehicle:
    08 4x4 dbl cab, TRD offroad
    Maybe tomorrow it will have coffee and doughnuts made for me!
     
  4. Oct 22, 2009 at 10:07 AM
    #4
    NraFan

    NraFan Join the NRA! Protect your freedom!

    Joined:
    Sep 13, 2009
    Member:
    #22703
    Messages:
    1,568
    Gender:
    Male
    First Name:
    JT
    SoCal
    Vehicle:
    2011 Sienna LE, rockin the mini van!
    Power sliding doors baby! WooHoo!
    Wouldnt that be nice.
     
  5. Oct 22, 2009 at 10:09 AM
    #5
    Lentsnh

    Lentsnh Well-Known Member

    Joined:
    Nov 22, 2008
    Member:
    #10953
    Messages:
    9,547
    Gender:
    Male
    Vehicle:
    2007 Hummer H3 Tactical Edition
    None yet- Future: HIDs, Tinted tails, LED interior lights,
    Its just a fuel pump check. It will shut off but you will have a check engine light when (or if you can) you start your truck
     
  6. Oct 22, 2009 at 10:12 AM
    #6
    swise

    swise [OP] TRIFECTA!!!

    Joined:
    Oct 22, 2009
    Member:
    #24716
    Messages:
    371
    Gender:
    Male
    ohio
    Vehicle:
    08 4x4 dbl cab, TRD offroad
    thanks! - but if the truck starts, isnt that a good enough fuel pump check? I guess I dont fully understand the reason for extra (expensive)shit installed to go wrong , just to perform an obvious test.
    I Love the truck, though!
     
  7. Oct 22, 2009 at 10:14 AM
    #7
    Lentsnh

    Lentsnh Well-Known Member

    Joined:
    Nov 22, 2008
    Member:
    #10953
    Messages:
    9,547
    Gender:
    Male
    Vehicle:
    2007 Hummer H3 Tactical Edition
    None yet- Future: HIDs, Tinted tails, LED interior lights,
    well it prepares for the next start. Im assuming. Its just one of those Toyota things that have very little explaination. :rolleyes:
     
  8. Oct 22, 2009 at 10:59 AM
    #8
    Krazie Sj

    Krazie Sj Resident Jackass

    Joined:
    Oct 9, 2008
    Member:
    #9849
    Messages:
    13,686
    Gender:
    Male
    First Name:
    Power Serge
    LV-426 (Acheron)
    Vehicle:
    07 TRD Off Road 4x4
    Borla Catback Exhaust, Airaid Short Ram Intake, 285x75R16 Mickey Thompson MTZs, 16" Konig Countersteer rims, ARB Bumper, All Pro LT w/Walker Evan Shocks front and back, All Pro expedition leaf pack, 10,000lb Superwinch, Intake Manifold Spacer, Bed Rack with ARB RTT, Rotopack and Hi Lift mounted, Husky Liner mats and an air freshener from 1995.
    Probably just makes sure there is fuel in the line, cause after a few hours it probably drains back into the tank, so it re-primes the line.
     
  9. Oct 22, 2009 at 11:53 AM
    #9
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    106,154
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    Its an emissions test. If a fault is found, it stores a code, but in most cases, the truck is fine to drive.
     
  10. Oct 22, 2009 at 11:53 AM
    #10
    Krazie Sj

    Krazie Sj Resident Jackass

    Joined:
    Oct 9, 2008
    Member:
    #9849
    Messages:
    13,686
    Gender:
    Male
    First Name:
    Power Serge
    LV-426 (Acheron)
    Vehicle:
    07 TRD Off Road 4x4
    Borla Catback Exhaust, Airaid Short Ram Intake, 285x75R16 Mickey Thompson MTZs, 16" Konig Countersteer rims, ARB Bumper, All Pro LT w/Walker Evan Shocks front and back, All Pro expedition leaf pack, 10,000lb Superwinch, Intake Manifold Spacer, Bed Rack with ARB RTT, Rotopack and Hi Lift mounted, Husky Liner mats and an air freshener from 1995.
    Swing and a miss for me!
     
  11. Oct 22, 2009 at 12:09 PM
    #11
    skistoy

    skistoy Make mine a Double!

    Joined:
    Jul 6, 2009
    Member:
    #19356
    Messages:
    2,006
    Gender:
    Male
    First Name:
    Mike
    Western New York
    Vehicle:
    09 4X4 SR5 BSP Double Taco
    Rear Spring TSB,Billy 5100@.85,Bull bar,Nerfbar,Painted Grill,Painted Rims,Bed D-rings,Compustar Starter,Goodyear Duratrac's,Transmission TSB,Brake Overide
    Face it.
    we are slaves of the Tacoma's.
    Do as they say or we are all doomed!!
     
  12. Oct 22, 2009 at 12:12 PM
    #12
    swise

    swise [OP] TRIFECTA!!!

    Joined:
    Oct 22, 2009
    Member:
    #24716
    Messages:
    371
    Gender:
    Male
    ohio
    Vehicle:
    08 4x4 dbl cab, TRD offroad
    I'll buy that - Thanks all!
     
  13. Oct 22, 2009 at 8:59 PM
    #13
    Carson

    Carson Well-Known Member

    Joined:
    Jun 22, 2009
    Member:
    #18794
    Messages:
    709
    Gender:
    Male
    First Name:
    Carson
    Modesto, California
    Vehicle:
    05 TRD Sport 4x4 SR5 V6
    Garage Fabbed +2 LT, FOA 2.5 RR w/ Comp Adj, 35 XMTs on Level 8s, 50T Spring Under w/ 13" Shackles, Elite Front Bumper, AP Rear, Retrofitted, Wicked Flow, Custom Roof Rack, Custom Sliders, Custom Scratches, 12" JL and an Audiopipe amp.
    Hmmm, i wonder what else it is doing while it is all by itself in the garage...
     
  14. Oct 22, 2009 at 9:08 PM
    #14
    vbibi

    vbibi Well-Known Member

    Joined:
    Jul 23, 2009
    Member:
    #20060
    Messages:
    515
    Gender:
    Male
    san fransisco bay area
    Vehicle:
    2009 4door long bed
    It has to be the vapor recovery processed in your fuel tank. Remember those fog lights mod when the lights will come ON for a few minutes like four hours after turning the engine off? This is it, and is normal.
    Take care
    vbibi:(
     
  15. Oct 22, 2009 at 9:11 PM
    #15
    jeremiekc

    jeremiekc Well-Known Member

    Joined:
    Apr 15, 2009
    Member:
    #16031
    Messages:
    800
    Gender:
    Male
    First Name:
    Jeremie
    Vilseck, Germany
    Vehicle:
    07 Regular Cab Base Model
    Secondary Air Filter removed, Painted Brake Calipers, AFN Drop in air cleaner, OEM Chrome Bumper, OEM Chrome grilll, OEM Cruise Control, OEM Interval Wipers, Hard Wired Garmin Nuvi 670, X-Runner Rims, Devil Horns, 6000w HID's, Bling Light Fogs with Blue Halo, OEM Bilstein Rear Shocks, 12V Plug in Truck Bed pocket. Debagged, 13" Antennax, Color Matched Satoshi Grill, URD Short Shifter, WeatherTech Floor Mats, PainLess Wiring Switched Fuse Box, Black Sand Pearl X-Runner Badges
    I wonder if it they could make it do the laundry or mow the lawn. That or put money into my bank account.
     
  16. Oct 22, 2009 at 9:25 PM
    #16
    THE TECHNICIAN

    THE TECHNICIAN Well-Known Member

    Joined:
    Aug 7, 2009
    Member:
    #20811
    Messages:
    178
    Gender:
    Male
    Again Chris was the closest. As stated in the book, about 5 hours after being off the EVAP system performs a self check to make sure no leaks are occuring. If any "small" or "gross" leaks are detected the check engine light will be on the next time you start your truck. Safe to drive but you won't pass a smog test. Remember now, tighten those gas caps....
     
  17. Oct 23, 2009 at 2:49 AM
    #17
    swise

    swise [OP] TRIFECTA!!!

    Joined:
    Oct 22, 2009
    Member:
    #24716
    Messages:
    371
    Gender:
    Male
    ohio
    Vehicle:
    08 4x4 dbl cab, TRD offroad
    I think its too smart for its own good. Just spent 110.00 for 1 spare key. I would rather pay 3.50 for a non-theft proof version and take my chances. Conceal carry is a much better theft protection device! Still a cool truck, though.
     
  18. Oct 23, 2009 at 5:52 AM
    #18
    msaniac

    msaniac Well-Known Member

    Joined:
    Apr 12, 2009
    Member:
    #15896
    Messages:
    89
    Gender:
    Male
    Clemson, SC
    Vehicle:
    '09 DC 4x4 TRD Sport Longbed
    LED Bed Lights, Prodigy P3 Brake Controller, K&N Air Filter, Viper 5901 Alarm, Kenwood 9140 Headunit (Sirius/GPS/Backup Camera)
    ^^^ agreed
     
  19. Oct 23, 2009 at 6:55 AM
    #19
    fishshooter

    fishshooter Well-Known Member

    Joined:
    Feb 13, 2009
    Member:
    #13586
    Messages:
    317
    Gender:
    Male
    Northwest Florida
    Vehicle:
    09 Super White TRD Off Road 4X4
    Stock
    You never leave your truck? I don't think the key is intended to prevent carjackings. :confused:
     
  20. Oct 23, 2009 at 6:59 AM
    #20
    mike s

    mike s Well-Known Member

    Joined:
    Sep 26, 2009
    Member:
    #23327
    Messages:
    67
    Gender:
    Male
    First Name:
    Mike
    South Carolina
    Vehicle:
    07 PreRunner
    The real question is; if the fuel pump relays are clicking in the garage, and no one is there to hear it, does it really make a sound?
    :D
     
To Top