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T100 Brake Booster Upgrade

Discussion in '1st Gen Tundras (2000-2006)' started by Thrussn, Mar 31, 2021.

  1. May 26, 2022 at 4:17 PM
    #91
    des2mtn

    des2mtn Ridgeline with a 4-speed

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    Start with why the ABS light is coming on and work from there.

    If you have a OBD-II scan tool that reads ABS codes, it might tell you the stored code that was causing the illumination. A good scan tool can also tell you the vehicle's speed, and each wheel's ABS sensor speed.

    If you DON'T have an ABS capable scan tool, you can can use a bare wire, paperclip or something similar to get the ABS code. If you can stop and do this as soon as the ABS light illuminates that would be great.

    You will need to connect two of the connectors inside of the OBD-II port above the gas pedal to get a code. #4 and #13.

    [​IMG]

    Once you have the connection made, switch the ignition on. The cruise control light should be blinking rapidly. After a few seconds, the ABS light will start flashing. Count these flashes, there will be two sets of them. (i.e. flash-flash-flash pause flash-flash-flash-flash = 34)

    Here's a list of all the DTCs on the ABS system: https://www.toyotaguru.us/sequoia-2007-repair/dtc-chart-of-abs-system.html

    If you got code 34 for instance, that would be your left rear wheel speed sensor having issues.
     
    tokolosh, Sirfive and Casper421 like this.
  2. May 26, 2022 at 5:17 PM
    #92
    Dave8699

    Dave8699 Trackrat

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    Wow very interesting I don't have a abs capable obd reader, but I will try and get a hold of one so it can be easier.
     
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  3. May 29, 2022 at 8:12 AM
    #93
    Dave8699

    Dave8699 Trackrat

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    Whole truck Raptor liner in olive green, leer camper cap, 5100 with OME, Wheelers AAL and Firestone Air bags.
    Ok so I replaced the booster under warranty and still the same resistance. I also checked vacuum and I'm getting about 23 in which I believe it prefect. What I did notice is I not getting the little hiss by the brake pedal so maybe it was leaking a little vacuum but that wasn't the issue.

    Screenshot_20220529-111120_Gallery.jpg
     
  4. May 31, 2022 at 2:06 PM
    #94
    Dave8699

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    Whole truck Raptor liner in olive green, leer camper cap, 5100 with OME, Wheelers AAL and Firestone Air bags.
    Any help would be appreciated, I have noticed that the truck is slowing down on its own. Like if there is light pressure applied to the brakes.
     
  5. May 31, 2022 at 2:11 PM
    #95
    Sirfive

    Sirfive Master Procrastinator

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    Wheels getting hot?
     
  6. May 31, 2022 at 2:11 PM
    #96
    Dave8699

    Dave8699 Trackrat

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    Whole truck Raptor liner in olive green, leer camper cap, 5100 with OME, Wheelers AAL and Firestone Air bags.
    I would have to take a temp but don't see no smoking.
     
  7. May 31, 2022 at 2:14 PM
    #97
    Dave8699

    Dave8699 Trackrat

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    Whole truck Raptor liner in olive green, leer camper cap, 5100 with OME, Wheelers AAL and Firestone Air bags.
    Also just to disengage from park to drive you have to push down very hard.
     
  8. May 31, 2022 at 2:18 PM
    #98
    Dave8699

    Dave8699 Trackrat

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    Whole truck Raptor liner in olive green, leer camper cap, 5100 with OME, Wheelers AAL and Firestone Air bags.
    So I pulled over and passenger calibers is hotter then drivers side I spit and it Sizzles.
     
  9. May 31, 2022 at 2:30 PM
    #99
    Sirfive

    Sirfive Master Procrastinator

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    Since one side is hotter, i’d pull the calipers and work the pistons in and out, one may be stuck. If mine start to drag again, i might get some new calipers.
     
  10. May 31, 2022 at 2:32 PM
    #100
    Dave8699

    Dave8699 Trackrat

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    Whole truck Raptor liner in olive green, leer camper cap, 5100 with OME, Wheelers AAL and Firestone Air bags.
    Even though they where fine before the new t100 booster and M/C? Could it be something else?
     
  11. May 31, 2022 at 2:45 PM
    #101
    Sirfive

    Sirfive Master Procrastinator

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    Theres a dealership tool that will cycle the abs pump on command. Maybe some gunk got dislodged from the lines during the swap?

    are your caliper pins greased? Noticed some drag when i jacked my truck up, pulled the pads, greased the pins, worked the pistons, all is well.
     
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  12. May 31, 2022 at 2:56 PM
    #102
    FirstGenVol

    FirstGenVol New Member

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    Not for our trucks. Too old. Empty Lord confirmed before when myself and a few others asked.
     
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  13. May 31, 2022 at 2:58 PM
    #103
    Sirfive

    Sirfive Master Procrastinator

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    Huh. Can it be hotwired?
     
  14. May 31, 2022 at 3:35 PM
    #104
    rock climber

    rock climber New Member

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    How old are the calipers?
     
  15. May 31, 2022 at 3:45 PM
    #105
    Dave8699

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    Whole truck Raptor liner in olive green, leer camper cap, 5100 with OME, Wheelers AAL and Firestone Air bags.
    Not that old around 2 years they are I believe tbe 13WL
     
  16. May 31, 2022 at 3:55 PM
    #106
    rock climber

    rock climber New Member

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    Sorry, I'm out of ideas.
     
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  17. May 31, 2022 at 9:21 PM
    #107
    assassin10000

    assassin10000 New Member

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    Dirt or gravel road/lot and some heavy braking will do it.

    I see NJ as his location. If they got some salt & water behind the dust seal on the calipers... could be time again.
     
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  18. Jun 1, 2022 at 5:48 AM
    #108
    Dave8699

    Dave8699 Trackrat

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    Whole truck Raptor liner in olive green, leer camper cap, 5100 with OME, Wheelers AAL and Firestone Air bags.
    So a little update still haven't figured it out. I inspected the calipers and they are not stuck. I took the pads off and cycled the pistons cleaned everything up and reinstalled them. Still have the same issue the pedal is super firm. Now I did notice that when I took the pads off and was cycling the pistons the pedal firmness was normal.

    So not sure my theory is correct but is it possible that the new master and booster doesn't provide enough travel and that's the reason for the firm pedal?
     
  19. Jun 1, 2022 at 6:36 AM
    #109
    Dave8699

    Dave8699 Trackrat

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    So just went out for a drive and truck is slowing down on its own again and the passenger side caliper is hot. I'm guessing it getting stuck once It starts getting warm. Now I'm thinking in just upgrading to the GX470 caliper but not sure snice I already have issues with braking. What do you guys think
     
  20. Jun 1, 2022 at 6:52 AM
    #110
    Sirfive

    Sirfive Master Procrastinator

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    Did you ever count the blinks for the abs light?
     
  21. Jun 1, 2022 at 7:14 AM
    #111
    Dave8699

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    Hasn't been on snice and no code comes up.
     
  22. Jun 1, 2022 at 7:24 AM
    #112
    Dave8699

    Dave8699 Trackrat

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    Whole truck Raptor liner in olive green, leer camper cap, 5100 with OME, Wheelers AAL and Firestone Air bags.
    So I just got home from doing a 15 min drive and my rotors are 411⁰ and my calipers 211⁰ I would be driving and I would be slowing down like if I was pressing the brakes.
     
  23. Jun 1, 2022 at 7:44 AM
    #113
    BubbaW

    BubbaW Saw it right off

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    May have missed this in re-reading your posts but is the booster check valve the original or did a new one come with the new booster if an AC comes with one ?
    I suppose what I am wondering is if your check valve is good or does an AC have a booster check valve ?
     
  24. Jun 1, 2022 at 8:23 AM
    #114
    Dave8699

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    New booster New Check valve which I have checked.
     
  25. Jun 1, 2022 at 8:27 AM
    #115
    Dave8699

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    Whole truck Raptor liner in olive green, leer camper cap, 5100 with OME, Wheelers AAL and Firestone Air bags.
    Ok so not sure what clicked in my head but I took the M/C out to check the push rod length and guess what it was way to long. I adjusted it the most I could have boom the pedal is much softer. Know I'm going on a drive to see if the car doesn't stop on its own.

    Moral if this story is check the push rod.
     
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  26. Jun 1, 2022 at 8:29 AM
    #116
    Sirfive

    Sirfive Master Procrastinator

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    If you spread the front passenger pads, and start the truck with the front jacked up, do they start dragging by themselves? Or do you have to hit the brakes to start the dragging?
     
  27. Jun 1, 2022 at 8:49 AM
    #117
    FirstGenVol

    FirstGenVol New Member

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    I think you are the first person that has paired the T100 booster/MC with the stock calipers. The T100 upgrade was intended to be paired with the larger 14WA calipers. Supposedly the larger bore MC would help push more fluid to the larger diameter caliper pistons.

    I have the exact opposite problem as you. After doing the 14WA swap I've had a mushy pedal ever since. I've not done the T100 swap though.
     
  28. Jun 1, 2022 at 8:55 AM
    #118
    Dave8699

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    Shit really I thought I had read guys swapping with the 13WL calipers.
     
  29. Jun 1, 2022 at 9:05 AM
    #119
    Casper421

    Casper421 Ridgeline on 35’s!

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    Have you played around with your booster rod?
     
  30. Jun 1, 2022 at 9:09 AM
    #120
    FirstGenVol

    FirstGenVol New Member

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    I have not. Seems like my issue is different since the pedal firms up after I up it once. I guess it's worth a shot. I would want to lengthen the rod so it's not traveling as far I assume?
     

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