Ok guys! I just purchase a cb7 accord ex-r tcm (pre-tuned to sport mode) and toke out my oem ex tcm.and now my shift thingy locked so now i have to a key in the shift release to move it to gear..
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Keep It Low, And Drive It Slow
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89 CRX dx with a 94 del so Si swap - deceased 91 civic hatchback Si with a JDM ZC SOHC swap-sold 92 CB7 accord sedan - living but stock -
Why did you take the old trans computer out? And if your car doesn't have the "sport" mode, I don't know if I'd use a computer that has it. Why not just get the same trans computer, that way you SHOULDN'T have any issues. -
"pre-tuned to sport mode"?
Sport mode is a feature found in 90-91 model CBs only. If you have a 92-93, it won't work unless you make some changes. It's a relatively useless feature, nothing "sporty" at all. It just makes the shift points later at partial throttle. The 92-93 models made some changes that essentially integrated that automatically, removing the need for a separate "mode".
So yes, if you have a 92-93, that tcu is for a 90-91, and is useless to you. If someone sold you on that "sport mode", you got hustled.
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Why exactly did you change your tcu/tcm?
What do you mean "pre-tuned to sport mode"? Instead of a switch on the shifter, they "jumped" it to make sport mode on all the time?
A S light on all the time can be a sign of a bad tcu/tcm, have you attempted to pull any codes off the ex-r tcm?
I am not sure how the cb's in Canada are equiped, they might not have the shifter release function. Its also possible that a different wire is used to signal the release of the shifter.
When people would use prelude tcu's they would get the same problem your having, in order to fix it you would have to do the following:
To make the shift lock operate properly you will need to run a wire from the shifter position switch to the tranny controller. On the left side of the shifter there is a box with about 5/6 wires going into it. This is the shifter position switch. You need to tap into the GRN/WHT wire and run it back to pin A7 on the TCM. Plug A is the bigger of the 2 plugs.
Oh and since we are on the subject of tcu/tcm's, you should really have a look at this thread: DIY: 90-93 Tcu Fix / Preventative Maintenance
I hope that helps
Last edited by cloudasc; 04-23-2012, 10:18 PM.Comment
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Somebody sold him on a "tuned TCU" like its an ECU or some shit, lol. He got jacked basically.
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You CAN "tune" a TCU... but it's something that really should be done in the fine-tuning stages of a complete build. Shift points can be tuned to a performance-built engine's powerband with effective results. It's not something you just buy and slap in the car, though... not if you expect anything good from it!
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I wish we could "tune" a our tcu's like an ecu, adjusting shift points would be such a nice thing to be able to do, especially for engine builder/swappers.Originally posted by HardInThePaint View Post
In all likely hood it would be possible, the components the tcu use are very similiar to our ecu's. Theres a spot on the circuit board for a 28-pin e/eeprom, but someone would need to either dump the programming directly from the microprocessor's rom, or find a tcu that has an eprom already installed into the circuit board. The next step would be to know what to look for.Comment
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Get on it, brotha!Originally posted by cloudasc View Post
It's done regularly on many other cars. Especially with today's modern performance cars with high-end automatic transmissions (or automated manuals... same concept when it comes to computer controls, really.) I'm sure there are a number of companies/tuners that modify the transmission computers for cars like the R35 GT-R, most Mercedes Benz models, the EvoX, the M3, Ferraris and Lamborghinis... There are an abundance of computer-controlled transmissions in performance cars today, and there have been for a number of years. I'd be willing to say with certainty (without even searching) that many such tuners exist.
They just don't exist for our cars... if they do, they are few and far between... most likely just hobbyists that "cracked the code", if you will. Our old automatic transmission designs aren't really high-tech enough for people to really bother tuning anyway. Today's automatics are superior to today's manuals... but yesterday's automatics have earned the term "slush box".
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