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What all does the check engine & ABS light monitor?

Discussion in '1st Gen. Tacomas (1995-2004)' started by Killer, Jun 12, 2010.

  1. Jun 12, 2010 at 4:14 PM
    #1
    Killer

    Killer [OP] Well-Known Member

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    I am wondering what systems does the check engine light and ABS light monitor?

    Can the check engine light just come on because you have not reset something after an oil change?

    Can the ABS light come on because of a different size wheel or taking it through mud?

    Thanks,

    Killer
     
  2. Jun 12, 2010 at 7:59 PM
    #2
    viperfella

    viperfella Well-Known Member

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    my abs light comes on everytime i lock my truck in 4 lo
     
  3. Jun 12, 2010 at 8:17 PM
    #3
    Killer

    Killer [OP] Well-Known Member

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    Does your ABS light stay on when you switch back to 2wd?
     
  4. Jun 13, 2010 at 6:18 AM
    #4
    EnolaGaia

    EnolaGaia Well-Known Member

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    The ABS light monitors the self-check status of the ABS setup. If it stays on it means one or more components of the ABS aren't verified as working right. If you have a locker it lights up whenever the locker is engaged, because the ABS is disabled while the locker is in use.

    Different sized wheels should have no effect on the ABS indicator (unless you damage ABS components putting the wheels on). Same thing for mud - it should have no effect unless it's affected or disabled one or more ABS components.
     
  5. Jun 13, 2010 at 6:21 AM
    #5
    Brunes

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    The Check Engine light is based on trigger parameters from the ECU. It can be any single or combination of 100's of conditions or failures. The Main't Req;d light that folks talk about is from the not resetting the counter.

    Enola hit the ABS pretty good.
     
  6. Jun 13, 2010 at 6:21 AM
    #6
    EnolaGaia

    EnolaGaia Well-Known Member

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    I have no idea what you're talking about here ...

    On a stock 1995.5 - 2004 Taco there is nothing to be reset after an oil change that should trigger a CEL.

    On the other hand ... If you disconnect or de-power certain components it might cause the ECM to temporarily throw a code until it verifies things are working right.
     
  7. Jun 13, 2010 at 10:25 AM
    #7
    crazyasu45

    crazyasu45 Well-Known Member

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    Different sized wheels should have no effect on the ABS indicator (unless you damage ABS components putting the wheels on). Same thing for mud - it should have no effect unless it's affected or disabled one or more ABS components.[/quote]

    What about putting bigger tires on in regards to the speed sensors...wouldn't that throw the ABS light :confused:
     
  8. Jun 13, 2010 at 10:34 AM
    #8
    75thrangertaco

    75thrangertaco Sua Sponte! RLTW

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    What about putting bigger tires on in regards to the speed sensors...wouldn't that throw the ABS light :confused:[/quote]nope.it may or may not affect the speedo reading the correct speed depending on how much bigger the tire is from stock,but as far as the light it wont come on as long as everything is working correctly. and as long as the wheels are all turning at the same speed. thats why you get a light if you put a doughnut spare on some cars.
     
  9. Jun 13, 2010 at 10:36 AM
    #9
    75thrangertaco

    75thrangertaco Sua Sponte! RLTW

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    if you damage a sensor or tone ring while in the mud it will come on. also if you get water in the connector or mud between the ring and sensor .
     
  10. Jun 13, 2010 at 11:27 AM
    #10
    viperfella

    viperfella Well-Known Member

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    yes after i engage my locker or i put it in 4 lo it will not shut off unless i turn my truck off and start it back up
     
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