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Old 05-04-2011, 01:02 PM   #1
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Does the ECU know what gear the MTX is in?

This is just a "I'm curious" question. Per the title. Does the ECU know what gear the MTX is in? If so, how does it know? I cannot find any 'sensors' in the schematics to indicate yes, but tuning stuff suggests it does.
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Old 05-04-2011, 01:50 PM   #2
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it could probably figure that out from rpm and speed. from just swapping my atx to mtx there are no sensors for what gear its in, it would have to be figured out by like a mph vs rpm table that has 1,2,3,4,5,R. but thats would be my guess if it did know what gear it was i'm, i'm not sure if it does know what gear its in or not.
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Old 05-04-2011, 02:20 PM   #3
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That makes a lot of sense. But what about neutral? Supposedly, it (ECU) also knows when the car is in neutral. Speed and RPM could be faked (slight downhill, RPM held, in neutral. you get the idea!). Maybe load is there as well?
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Old 05-04-2011, 04:45 PM   #4
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possibly load, i was just guessing how it would be done. i know it doesn't have a sensor that tells it the gears. the information from other sensors can determine a gear though, if the ecu does. i would send tom, fswerks or any other tuner, they should know.
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Old 05-05-2011, 08:13 PM   #5
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Quote:
Originally Posted by S0C0nFused View Post
This is just a "I'm curious" question. Per the title. Does the ECU know what gear the MTX is in? If so, how does it know? I cannot find any 'sensors' in the schematics to indicate yes, but tuning stuff suggests it does.
Thanks!


What "tuning stuff" are you suggesting the ecu knows what gear the mtx is in?
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Old 05-05-2011, 08:15 PM   #6
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well in addition to that, what would happen if you were running an mtx with an atx computer?
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Old 05-05-2011, 09:12 PM   #7
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Well if the ECU does know when it's in 1,2,3,4,5 or even Rev, maybe when it see's that it is not in any of those gears, the ECU knows it must be in N?
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Old 05-05-2011, 10:47 PM   #8
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Quote:
Originally Posted by Mike_Mac View Post
possibly load, i was just guessing how it would be done. i know it doesn't have a sensor that tells it the gears. the information from other sensors can determine a gear though, if the ecu does. i would send tom, fswerks or any other tuner, they should know.
I think you guess good! Good to know I was not missing something about the sensors (as I could not find any at all either). Not going to bother Tom or Randy. Was just curious as I said.
redZX300 >> "What "tuning stuff" are you suggesting the ecu knows what gear the mtx is in? "
Explore Advantage III Pro tuning software. Yes, the ECU apparently knows what gear the tranny is in. The question is (or was) How!

mikebontoft >> "what would happen if you were running an mtx with an atx computer?"
Describe how you would interface them for starters?

Djzx3 >> Per above. A "If not, then" logic tree is completely valid. I don't know. Therefore, maybe!
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Old 05-06-2011, 07:29 AM   #9
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I am not sure , this has never come up before

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Old 05-08-2011, 04:05 PM   #10
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i imagine the ecu has an idea or atleast when its in 5th, because we dont get the "up shift" light/arrow.
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