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Passenger door unlock with Smart Key

Discussion in '3rd Gen. Tacomas (2016+)' started by ratcityrain, Dec 10, 2016.

  1. Nov 24, 2017 at 8:46 AM
    #81
    helix66

    helix66 Well-Known Member

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    nothing yet

    Where are you getting the schematics, from a service manual?
     
  2. Nov 25, 2017 at 5:54 PM
    #82
    96ti

    96ti Active Member

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    helix66 likes this.
  3. Nov 25, 2017 at 8:55 PM
    #83
    helix66

    helix66 Well-Known Member

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    nothing yet
    Thanks @96ti......luckily I have a work pc, oddly it didn't do anything on my mac!
     
  4. Nov 29, 2017 at 10:00 AM
    #84
    96ti

    96ti Active Member

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    Got the handle wired up and tapped into C29-3 (Green) & C29-4 (blue) - neither handle works.
    Tried switching the wires from the passenger handle and still no luck.
    Seems like the driver door/smart key un/lock becomes disabled when too much resistance is added inline.
    Keyfob still works fine the entire time though.


     
    Matttrow and Prairie Hawk like this.
  5. Nov 29, 2017 at 10:04 AM
    #85
    mesojdm

    mesojdm Major Modder

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    this was my fear...
     
  6. Nov 29, 2017 at 11:01 AM
    #86
    96ti

    96ti Active Member

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    Measured the resistance of the wire + connectors I used - 22ga stranded wire @ ~6ft, posi tap, and random 22ga connector = 0.8ohms.

    I'm not an electromagician but I see this as being difficult to get around, hence your fear.
     
  7. Nov 29, 2017 at 5:32 PM
    #87
    tacogeorge

    tacogeorge Well-Known Member

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    I believe it's actually called convenience... :boink:
     
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  8. Nov 29, 2017 at 6:50 PM
    #88
    AWDDude

    AWDDude Well-Known Member

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    I wonder what would happen if you wired them in series instead of parallel.
     
  9. Dec 28, 2017 at 7:03 AM
    #89
    FlintRockbone

    FlintRockbone Tacoma Newbie

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    Been following this thread for a while. Has anyone made any further progress or is the resistance problem insurmountable?
     
  10. Dec 28, 2017 at 5:25 PM
    #90
    MyDirtyTaco

    MyDirtyTaco New Member

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    I created my account just to follow up on this. I was in my dealership earlier today and asked the guy at the “store” part of the shop if this was possible and he said no, but of course I’m not of the belief that those guys always know what they are talking about. There is a “customs” shop inside the dealership and I asked them as well and they said they couldn’t do it. Again, he put zero effort into actually looking into it so I remain hopeful. I feel like this thread is my last hope at getting a smart key handle on the passenger door.

    For you guys that are savy enough to work on this, I commend you. You have a fan in me. Please let us know if it is possible and thank you for your work.
     
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  11. Dec 28, 2017 at 5:59 PM
    #91
    96ti

    96ti Active Member

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    I gave up and returned my part.

    Wiring in series would make resistance higher than parallel.
     
    MyDirtyTaco likes this.
  12. Dec 28, 2017 at 6:01 PM
    #92
    mesojdm

    mesojdm Major Modder

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    I'm still gonna take a crack at it when I have some free time.
     
    EagleUSMCRet and MyDirtyTaco like this.
  13. Dec 28, 2017 at 6:01 PM
    #93
    Victory

    Victory Well-Known Member

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    I haven’t dug into the truck to find the cpu that controls the door locks system, but when I did the research for the Lexus Key card it appears there are multiple ports on the cpu for multiple door handles, including passenger side and possibly a rear hatch (though that wouldn’t be something that would work on a Taco) the cpu part number is the same as for the highlander). If these ports are there like I think they are, we should be able to plug into a port specifically for the passenger door lock.

    Getting the door handle is the easy part, the wiring harness and plugs is another story.

    I haven’t had the time to dig in yet, but I should in a couple weeks.
     
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  14. Dec 28, 2017 at 6:28 PM
    #94
    RushT

    RushT What goes here?

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    Might not be that weird. RAV4 is a 'soccer mom' demographic, so opening from passenger door makes more sense than from the 'guy' segment. Plus, better lighting for mom to drive with. Tacoma is primarily a 'guys' vehicle, so the better head unit fits the demographic. I'd guess that men are more likely to use GPS than women, but could be wrong there. One thing's for sure, Toyota thought long and hard about what choices they made. Those choices have 1) annual financial return in mind, and 2) long term brand loyalty in mind, and 3) customer wishes and desires. As for what order, I'm not sure.
     
  15. Dec 28, 2017 at 7:55 PM
    #95
    TacoTruck808

    TacoTruck808 Well-Known Member

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    :bowdown::bowdown: I hope you guys can figure this out.
     
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  16. Feb 1, 2018 at 7:13 AM
    #96
    Imagesetc

    Imagesetc Shock Stormtrooper

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    Anyone had any luck on this putting together a passenger door smart lock?
     
  17. Feb 1, 2018 at 3:09 PM
    #97
    Victory

    Victory Well-Known Member

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    Keep an eye on this thread, I suspect you’ll hear some news soon ;)
     
  18. Feb 14, 2018 at 12:22 PM
    #98
    Victory

    Victory Well-Known Member

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    Sorry I haven’t been on in a while, it’s been a busy couple of weeks, when I posted above I was thinking I’d be able to repost again in a day or two with good news. Unfortunately though I thought I had it all worked out, I still didn’t have any luck.

    While it didn’t work, any information may help in those who are working to solve this.

    I found that the Highlander seems to share the same CPU for the Smart Key system, so I looked in the wiring diagrams and found that on the Highlander the wiring for the passenger door handle goes to the same connector on the CPU as the drivers side (C29), but instead of pins 3&4, it goes to pins 1&2. Specifically pin 6 on the handle runs to pin 1, and pin 4 on the handle runs to pin 2. Those pins are in the CPU, but the connector does not have wiring or the female terminals in it.
    I thought perfect I’ll order those terminals as well as the handle and the connector for the handle and those terminals, and this should all work. The terminals come with a short pigtail of 22 gauge wire, which I soldered to 24 gauge speaker wire.
    Unfortunately once all was installed, the new smart handle acted just like the old dumb handle, in other words I didn’t work. I even tried leaving a key on the drivers side while I tried the passenger side.

    I haven’t had a chance to pull that CPU out and crack it open, it could be that the pins don’t go anywhere once they are in the box, but my best guess is we need some reprogramming.
     
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  19. Feb 14, 2018 at 12:33 PM
    #99
    mesojdm

    mesojdm Major Modder

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    You're doing god's work, son.:thumbsup:
     
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  20. Feb 14, 2018 at 12:48 PM
    #100
    ToyoTacoTurner

    ToyoTacoTurner Well-Known Member

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    TRD PRO GRILL..... I'd do more but MESO is teasing us...
    I'd be willing to chip in some $$ to aid in R&D. Fully understanding that I am not paying for the product, just for the attempted results. I know this costs you guys money.
     
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