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Thread: DBW Throttle Body Fails TPS Autoset

  1. #1
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    Default DBW Throttle Body Fails TPS Autoset

    I have a GM 12605109 DBW throttle body, new install. When performing a TPS Autoset, I get an error stating min-0.0 volts, max-0.0 volts. Any suggestion what to check?
    HWYSTR455 on Performance Years Forums
    1970 GTO Judge Tribute Pro-Tour Project: http://forums.maxperformanceinc.com/...d.php?t=760624
    1971 Trans Am 474 Blown EFI Pro-Tour car (next on list).
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  2. #2
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    I've been told, users with Drive-By-Wire Errors should contact Holley Tech Service (LINK). However, read this:
    http://forums.holley.com/showthread....2262#post62262 (Similar Forum Thread - Posts #3 & #6)
    May God's grace bless you in the Lord Jesus Christ.
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  3. #3
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    That actually was helpful, the other thread, gives me a couple things to check. I will say though that the pedal is seeing full range of actuation. I'll try unplugging sensors, that could be a potential cause. So I believe my setting is also 'Custom', though can't recall if I did that specifically as per some type of instruction I followed or not. So am asking, is that in fact the correct selection? I'm on V5, and used the table for recommended settings for a 'GM Throttle Body', are those initial values correct? The ones in the table? The pedal assembly I'm using is the CTS/CTS-V 10379038, for situational awareness. My error code is a (5).
    HWYSTR455 on Performance Years Forums
    1970 GTO Judge Tribute Pro-Tour Project: http://forums.maxperformanceinc.com/...d.php?t=760624
    1971 Trans Am 474 Blown EFI Pro-Tour car (next on list).
    1972 442 W-30 Tribute build thread: https://classicoldsmobile.com/forums...e-project.html

  4. #4
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    I contacted support, was told it can only be the throttle body or the harness. I checked the harness, and there are no obvious signs of damage. There is a 5V reference signal at the ends of the harness. I did some preliminary readings on the throttle body and the checks appear within values. When I asked support about the possibility of the pedal being bad, I was told it has to be in the harness or throttle body only. Any suggestions?

    Maybe the individual I spoke with was not familiar with DBW setups? And I should try calling back?
    I would hate to buy another throttle body and/or another harness, just to find out that's not the issue. Suggestions?
    NOTE: I have updated to V5 build 130 SW & FW, no change, error still occurs.
    Last edited by HWYSTR; 12-07-2019 at 01:01 PM.
    HWYSTR455 on Performance Years Forums
    1970 GTO Judge Tribute Pro-Tour Project: http://forums.maxperformanceinc.com/...d.php?t=760624
    1971 Trans Am 474 Blown EFI Pro-Tour car (next on list).
    1972 442 W-30 Tribute build thread: https://classicoldsmobile.com/forums...e-project.html

  5. #5
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    Coming back around to this, since it's one of my final steps remaining on my project. So was going over my 558-406 DBW harness instructions, and see that the following throttle bodies are the only listed ones:
     GM P/N - 12570790  GM P/N - 12580760

    That caught me off guard, since I have the 1260509 DBW body, and specifically recall in the compatibility listing in the selector guide listed that TB. So went back to Holley's website for harness products, and see other harnesses listed:
    558-406 GM Throttle Bodies
    558-411 GM Dual Throttle bodies
    558-429 GM Early Truck Throttle bodies.

    Different throttle bodies are listed in the instructions for each harness, and the only one that has the throttle body I have listed is the dual-throttle body harness.
    Is that the only harness that is compatible with my throttle body? Can I use the dual TB harness with only one TB?
    Is there another harness that supports the TB I have, is there an error in the listings, what are my options?
    Surprised support didn't pick this up when I spoke to them, I provided all the part numbers when I called.
    HWYSTR455 on Performance Years Forums
    1970 GTO Judge Tribute Pro-Tour Project: http://forums.maxperformanceinc.com/...d.php?t=760624
    1971 Trans Am 474 Blown EFI Pro-Tour car (next on list).
    1972 442 W-30 Tribute build thread: https://classicoldsmobile.com/forums...e-project.html

  6. #6
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    So digging a little more on this, the 12570790 'Silver Blade' throttle body is different than the 'Gold Blade' 12605109 throttle body I have is that the throttle blade moves in the opposite direction.
    Is it possible to re-pin the harness 'Force Motor 1A' and 'Force Motor 1B' as well as the 'TB TPS #1' and 'TB TPS #2' pins, and have it work with the 12605109 TB? Anyone?
    HWYSTR455 on Performance Years Forums
    1970 GTO Judge Tribute Pro-Tour Project: http://forums.maxperformanceinc.com/...d.php?t=760624
    1971 Trans Am 474 Blown EFI Pro-Tour car (next on list).
    1972 442 W-30 Tribute build thread: https://classicoldsmobile.com/forums...e-project.html

  7. #7

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    A new gold blade LS3 TB is like $120. I'd buy that be call it a day. Andrew
    IG @projectgattago

  8. #8
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    Yeah Andrew, that's what I have. That's the 12605109 gold blade TB, and that's the one that's not compatible, according to the 558-406 harness instructions.
    HWYSTR455 on Performance Years Forums
    1970 GTO Judge Tribute Pro-Tour Project: http://forums.maxperformanceinc.com/...d.php?t=760624
    1971 Trans Am 474 Blown EFI Pro-Tour car (next on list).
    1972 442 W-30 Tribute build thread: https://classicoldsmobile.com/forums...e-project.html

  9. #9
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    So the way it stands right now, the only supported configs for DBW, with the universal main harness, is to use the silver blade, or the 'truck' DBW TBs with the 558-406 DBW harness, unless you do one of the 'LSx', Mod Hem, or Coyote setups, or a dual DBW setup. So those who want to use a DBW conversion in a 'universal' install, are forced to attempt to source a discontinued 'silver blade' DBW TB, or the lower flowing, more bulky truck TB.

    All this would take from what I'm seeing is a software upgrade, to remap pins for the 406 harness, and mod some tables. The drop down selection in the ICF menus can easily add the option for the more popular and available, 12605109 DBW TB.

    I'm currently running the V5 .130 software and firmware, and in the process of going to .140 as I type this. That won't provide a fix for me, but it does have other DBW improvements.
    HWYSTR455 on Performance Years Forums
    1970 GTO Judge Tribute Pro-Tour Project: http://forums.maxperformanceinc.com/...d.php?t=760624
    1971 Trans Am 474 Blown EFI Pro-Tour car (next on list).
    1972 442 W-30 Tribute build thread: https://classicoldsmobile.com/forums...e-project.html

  10. #10
    Join Date
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    EFILive has the info for the differences between the silver & gold DBW TBs, and laid it out here:
    https://forum.efilive.com/showthread...-gold-settings

    The info specific to the Holley software for the mods, I'm sure they have, or can be compared to the info used in the EFILive software, which looks like this:
    B2517 "TCS Throttle Limiter by Input Speed" -98.596170 "Different from cell: 0,0 to cell: 5,8 inclusive."
    B2800 "Throttle Response Map 'A'" -1.364157 "Different from cell: 0,12 to cell: 16,16 inclusive."
    B2801 "Throttle Response Map 'B'" 0.050355 "Different from cell: 0,13 to cell: 16,16 inclusive."
    B2802 "Throttle Response Map 'C'" 0.050355 "Different from cell: 0,14 to cell: 16,16 inclusive."
    C0807 "Throttle Too Low Error" -4.100099 "CAL: 11.00 <-> ALT: 6.90"
    C0808 "Throttle Too High Error" -4.100099 "CAL: 11.00 <-> ALT: 6.90".
    HWYSTR455 on Performance Years Forums
    1970 GTO Judge Tribute Pro-Tour Project: http://forums.maxperformanceinc.com/...d.php?t=760624
    1971 Trans Am 474 Blown EFI Pro-Tour car (next on list).
    1972 442 W-30 Tribute build thread: https://classicoldsmobile.com/forums...e-project.html

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