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  1. #1
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    Default Stir the pot a bit -- ST246 swaps

    I see these are currently all the rage in the MR2 community. Very readily available, cheap and are 95% identical to a ST215. There are some internal difference (rings, etc) but overall are vastly identical to a Gen4 swap.

    The only difference -- is in the electronics. The ST246 utilizes an engine immobilizer within the ECU. No paired keyfob/transponder -- ECU no worky worky and no swap starting.

    Couple options I've seen to resolve this involve doing a full standalone ECU, buy a keyfob, transponder, new igintion cylinder (to match keyfob), get dealer to program transponder/keyfob to ECU, and I've seen that TCS is able to remove the transponder from the ST246 ECU (effectively making it a ST215 swap).

    I guess the question becomes is this worth it? For sake of ease, I'd probably do the TCS route. Since I'll be sending the harness over to MR220v for conversion, the ECU may as well go out to.

    I could always just do a gen4 swap again -- but that's looking in the 1500-1800 price range right now for me to pick one up locally. Online is still in the 1500 range after shipping and damn import fees.

    If the cost to swap the ECU out is nominal, may as well do the gen5 swap, pick it up locally for 900 (I've been negotiating with an importer right now saying it's useless without keyfob and transponder due to the immobilizer).

    Not like anyone here drives a celica anymore -- but throwing it out here for discussion.
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  2. #2
    Resident Japexican Ninjaneer
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    Default

    I thought that they had cracked the 246 ECU to disable the immobilizer.

    It was part of the reason for the uptick in using the engine.
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  3. #3
    Ultimo Miembro Fantástico Gigantesco 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli's Avatar
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    Default

    Yeah that's what I've been reading about too. I got in contact with TCS and they'll do it for a nominal cost. It'll be worth it though even if the importer locally won't discount due to the transponder missing. A gen4 motor from them is 1300 and gen5 is 949.
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  4. #4

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    Default

    There is a good chance the importer knows that the ECU can be hacked.

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  5. #5

    Default

    Wow, if that’s the case go Gen. 5. My only gripe would be the center throttle body .

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    Project Ava
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  6. #6
    Ultimo Miembro Fantástico Gigantesco 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli's Avatar
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    Default

    I'm not concerned about it. I have a fee routing ideas for the charge pipes to avoid extended heat soak.

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    Jasmine - 1989 GTS. GenIV 3s-gte, e153 LSD transmission, 3" turbo-back exhaust. SOLD

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  7. #7
    Ultimo Miembro Fantástico Gigantesco MrWOT has much to be proud of MrWOT has much to be proud of MrWOT has much to be proud of MrWOT has much to be proud of MrWOT has much to be proud of MrWOT has much to be proud of MrWOT has much to be proud of MrWOT has much to be proud of MrWOT has much to be proud of MrWOT has much to be proud of
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    Default

    It's usually not too hard to bypass them, you have to for remote start systems, most stereo/alarm shops know how.


    I'd be far more interested to see it use the sensors and PCM from something with easy tuning accessibility.
    I really like the way aaawelder put it: "do not include yourself in this circuit"

  8. #8
    Senior Member underscore is a jewel in the rough underscore is a jewel in the rough underscore is a jewel in the rough
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    Default

    What's the overall difference in cost to get the end result you want? The $350 saved up front could get chewed through pretty fast by other stuff.

    Quote Originally Posted by MrWOT View Post
    It's usually not too hard to bypass them, you have to for remote start systems, most stereo/alarm shops know how.
    Those usually involve a device which clones the code from one of your keys though, which isn't much help if you don't have any of the keys.
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  9. #9
    Ultimo Miembro Fantástico Gigantesco 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli's Avatar
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    Default

    Quote Originally Posted by underscore View Post
    What's the overall difference in cost to get the end result you want? The $350 saved up front could get chewed through pretty fast by other stuff.

    Those usually involve a device which clones the code from one of your keys though, which isn't much help if you don't have any of the keys.
    The St215 and ST246 are basically the same. It'll take the same work one way or another. I'm sending the harness out to get done. That price doesn't change. The only 'saving' is not having to pay the $125 for the immobilizer removal with a gen4. You're also on point about the keys -- it needs a transponder and the coded keys to work. That all can be purchased for a couple hundred. I'd rather spend $125 and get it removed from the ECU.
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  10. #10
    Ultimo Miembro Fantástico Gigantesco 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli has a reputation beyond repute 4thgenceli's Avatar
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    Damn importer is out for a few months they're saying now. He's expecting a shipment in 90 days with more. Guess I'll just start on the brakes and bearings while I wait....
    Jasmine - 1989 GTS. GenIV 3s-gte, e153 LSD transmission, 3" turbo-back exhaust. SOLD

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