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Does the 2nd gen have can bus and is that easy to program?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by d k, Jun 19, 2025 at 12:09 PM.

  1. Jun 19, 2025 at 12:09 PM
    #1
    d k

    d k [OP] Well-Known Member

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    Curious if thats an issue or if someone knows how to control/program etc?

    Thanks
     
  2. Jun 19, 2025 at 12:13 PM
    #2
    Dm93

    Dm93 Test Don't Guess

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    Not sure what the question is here?

    Yes some of the modules communicate over CAN.
     
  3. Jun 19, 2025 at 12:15 PM
    #3
    d k

    d k [OP] Well-Known Member

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    Question is does anyone know how to program the CaN?
    Lets say you were to do an engine swap or something similar.
     
  4. Jun 19, 2025 at 12:25 PM
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    TnShooter

    TnShooter The TacomaWorld Stray

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    CaN is a communication network.
    You can't program the network.
    The network is the road. Not the data.
    Modules send data over the network (canh and canl)
     
  5. Jun 19, 2025 at 12:29 PM
    #5
    d k

    d k [OP] Well-Known Member

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    Im not an it guy so its possible Im using the wrong terminology.
    You can program the ‘data’ or the message and most of the time you have to if you take any sensors off line or need to eliminate something altogether.
    Some vehicle have a well known and developed can support. Others dont. Im just trying to see what is available for this truck
     
  6. Jun 19, 2025 at 1:12 PM
    #6
    TnShooter

    TnShooter The TacomaWorld Stray

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    I think what you are getting at is, can you get the new (swapped) engine to integrate to the existing Toyota system?
    So that the other accessories will still work as intended.
    The 2nd Gen trucks are relatively "stupid". You can usually get a swapped engine to "run". (Depending on the engine)
    But you are going to have to live with warning lights on, on the dash.

    Before I'd do anything, I look up the LS swap thread on here.
    And the Lexus LX swap.....

    I'd be really sure you are capable, and know what you are in for, before buying a "swap" engine.

    I'm going to be honest, I going to say, "Don't do it".

    Drop in the same engine that was in the truck (new/rebuilt/used) and throw a power adder on it (S/C or Turbo).
    It will be easier in the long run. And cheaper depending on the options you choose.
     
    Last edited: Jun 19, 2025 at 1:23 PM
    TXpro4X4, RockinU, Dm93 and 1 other person like this.
  7. Jun 19, 2025 at 2:34 PM
    #7
    Dm93

    Dm93 Test Don't Guess

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    It would help to know exactly what you are wanting to do and what year of 2nd gen.

    There's not alot of things going on on the CAN especially on pre-11 trucks, most of the main signals one would need like coolant temp, engine speed, vehicle speed, A/C permission/command, etc are on dedicated wires.

    This isn't a new/high end car where everything operates on a data bus, most things have dedicated wires for each signal instead of a multiplexed data bus.
     
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  8. Jun 19, 2025 at 3:27 PM
    #8
    Jimmyh

    Jimmyh Well-Known Member

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    Just so you know:

    In the United States, the Controller Area Network (CAN) bus became mandatory for all new light-duty vehicles starting with the 2008 model year.This requirement was tied to the OBD-II (On-Board Diagnostics) standard, specifically for emissions diagnostics over the CAN protocol (ISO 15765-4 CAN)
     
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  9. Jun 19, 2025 at 3:43 PM
    #9
    d k

    d k [OP] Well-Known Member

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    something in those lines, yes. This is available on other platforms and its rather well developed (like FRS/BRZ), others not so much.

    So does anybody here do anything like that?
     
  10. Jun 19, 2025 at 4:09 PM
    #10
    TnShooter

    TnShooter The TacomaWorld Stray

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    The short answer is No.

    The long answer is, Yes.
    There are guys on here that could, but they probably aren't going to.
    And add in the fact, it's not their truck they'd be "doing it to". The odds anyone is gong to do it low. Very low.

    Again, being honest, most of the guys that do engines swaps. Are the type guys that are only doing it because "They, themselves can" and just want to do it.
    Occasionally you see the guy that buys an LS and THEN ask how to swap it. By that time they are already in over their head.
    Lucky for you, you are asking FIRST. Before you buy anything.

    And again, again. I think you'd be better of sticking to what came in the truck.
     
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  11. Jun 19, 2025 at 4:31 PM
    #11
    d k

    d k [OP] Well-Known Member

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    I appreciate your input, but I dont think we are entirely on the same page. Close but not exactly.

    When I asked about doing programming, I wasnt looking for some dude who thinks he knows something.
    I was looking for someone who is comfortable doing this kind of programming. Its not total rocket science but it does require someone who knows what they are doing and are comfortable doing it.

    These guys are able to put a Honda Kseries in the 86 and have everything programmed so gauges, power steering, AC - all work. Its not that impossible to do, just need someone in that field.

    https://kpower.industries/pages/turn-key-swaps


     
  12. Jun 19, 2025 at 4:43 PM
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    TnShooter

    TnShooter The TacomaWorld Stray

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    Not that I am aware of.
    Tacoma swaps are not a big thing. And not many people do it.
    I'd have to say, it isn't worth the time to develop it.
    And you'd also need to develop it for different year models too.
    2Nd gens had a few changes where things were added to the CAN.

    Add the fact that there was a factory supercharger available. And a lot of after market support for booting these engines, and no one I know of has developed a "swap" kit.
    Well, other than the diesel swap.....

    We have guys making over 450 WHEEL HP with the 1GR......
    Most that go big, are going with boost.....

    Hey, I'm all for someone doing a swap kit.
    The more options we have the better. But not many guys are going to do it.
    Let alone develop a system, sell it, and then add technical support.
    Almost NEVER is it a straight forward swap. Who ever does the kit, is going to be on tech line a lot......
     
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  13. Jun 19, 2025 at 4:48 PM
    #13
    Dm93

    Dm93 Test Don't Guess

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    Essentially the only thing as far as CAN goes that you would have to figure out is the ECM and Skid Control ECU (ABS) communication if it has VSC which is some 05-08 and all 09+ and the coolant temp for the Combination Meter (Instrument Cluster) on 12+.

    As far as gauges and A/C you would need custom signal generators for the temperature and RPM signals as well as generating a Lock Sensor signal to the A/C Amplifier if you aren't using a stock Toyota compressor that has a Lock Sensor.
     
  14. Jun 19, 2025 at 6:15 PM
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    joba27n

    joba27n YotaWerx Authorized tuner

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    So depending on what you're trying to do with it exactly you can get CAN readers. Those will work for simple on/off circuits like lights, or A/c control or brake pedal input. They work by basically you plug them into the network and do the function you want to copy to record it then program your CAN reader to do something else when it see's that signal.

    I was looking into them when I was walking the path of doing the 2Lo mod as a single button press function which basically would work as pressing the button would initially send the signal for 4wd while spoofing the ADD then when it saw the CAN confirmation for 4wd it would then send the signal for "4lo". Deactivating with a single button press again in the appropriate order. I haven't done the mod at all so I have no assistance in that area. It was just a thought.

    You can also get modules that create a CAN signal but then the issue will be what module will the other ones think sent the signal. You'll be into some high level tech at that point either adding a module to the system or imitating one as you'll possibly corrupt the network.

    There are a few programs like this that can read/create CAN comms but you'll have to decipher it and cut the message yourself which can be a task on it's own if for example the engine is running and you're trying to pull an a/c signal out of all the chatter
     
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  15. Jun 19, 2025 at 6:51 PM
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    Dm93

    Dm93 Test Don't Guess

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    That would make sense on a 3rd gen where alot of stuff runs on CAN but 2nd gens as I've been trying to explain don't run much at all on CAN.

    We have figured out how to solve various things like making the A/C work and the gauges work, nothing else really needs the ECM to be there to work aside from the ABS unit for Traction Control and VSC.

    As far as programming the ECM or any other ECUs to run a different engine I'm not aware of any Toyota ECM or ECU that is capable of doing that, the part number of the ECM is specific to the engine, drivetrain, and platform unlike many vehicles that use a "universal" ECM where all of the vehicle parameters/configuration are defined by the software programmed into it.
     
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  16. Jun 19, 2025 at 7:05 PM
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    d k

    d k [OP] Well-Known Member

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    I dont know about the Tacoma specifically, but as it relates to other platforms, thats not correct.
    Canbus manages everything. Lights, dash, ac, pwer steering whatever else you can think of.
    otherwise, you can get the engine in, but it will look like a hack job and nothing will work.

    its not that hard for people that are familiar with that stuff.

     
  17. Jun 19, 2025 at 7:15 PM
    #17
    d k

    d k [OP] Well-Known Member

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    This is exactly why I posted the question.
    If you pull something out of the system, the system will freak out.
    In this case, Im trying to pull the entire engine out of the system, so you can imagine what the computer will do unless its programmed correctly!
    As it is, I will most likely have to run parallel ecus, but thats not that big of a deal.

    1. I would like to figure out how to keep the dash and all the controls functioning with no check light, etc.
    2. I would love to find out what it would take to control an auto trans ‘externally’. I will most likely go with a manual, but it would be great to have this option for an auto trans as well.
     
  18. Jun 19, 2025 at 7:25 PM
    #18
    d k

    d k [OP] Well-Known Member

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    this is literally the million dollar question that Ive been trying to get an answer to lol
    WHAT exactly runs on canbus?

    do you care to expand on this? What do you need the fuel gauge to work? What about dash/ac?

    what needs to happen for the abs to work (and clear a warning light which surely will happen)

    As far as programming the ECM or any other ECUs to run a different engine I'm not aware of any Toyota ECM or ECU that.[/QUOTE]

    thats not what Im looking for at all.Im looking to run a different engine with its specific ecu and just want the support systems (ac, dash, fuel gauge, abs) to work - what needs to be done to achieve that?

    athanks guys
     
  19. Jun 19, 2025 at 7:27 PM
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    killerkeener

    killerkeener Well-Known Member

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    Yes you can do it ...just keep trying ..you'll figure it out eventually ... learn to do it yourself..you'll never need to ask anyone again ...KEEP US POSTED ON YOUR PROGRESS !
     
  20. Jun 19, 2025 at 7:27 PM
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    RockinU

    RockinU Well-Known Member

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    He’s talking about the 2nd gen Tacoma specifically, as that is what you asked, and it is correct.
     

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