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Old 04-11-2005, 10:05 AM   #1
staticfritz
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Member#: 66934
Join Date: Jul 2004
Chapter/Region: NWIC
Location: Seattle WA
Vehicle:
2004 JBP FXT
2002 cammed OBS - RIP

Default 5mt ecu vs 4eat ecu

two ecus from '02 obs's. one is from a 5mt, the other is from a 4eat. are the ecu's the same, or is the tcu a part of the ecu unit?
basically, if i went to send one out for work and then swap it in, will there be any problem?
thanks!
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Old 04-12-2005, 04:34 PM   #2
CirrusWRX
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Heh - stumbled on this by accident. I'm almost 100% sure (don't you love that phrase?) that auto and mt's use the same ECU - it's the transmission plug that is different, and thus, "tells" the ECU which mode to operate in.
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Old 04-12-2005, 05:09 PM   #3
yobtah
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Quote:
Originally Posted by CirrusWRX
Heh - stumbled on this by accident. I'm almost 100% sure (don't you love that phrase?) that auto and mt's use the same ECU - it's the transmission plug that is different, and thus, "tells" the ECU which mode to operate in.
That would make sense... it's not really conclusive evidence, but Cobb's Accessport maps don't differ for MT or AT cars. In fact, the "stock" map stored in an Accessport is supposedly based on an AT WRX. Seems reasonable that the ECUs are identical and the presence or absence of an automatic trans determines ECU behavior.
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Old 04-12-2005, 07:02 PM   #4
STiTuner
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if you dyno a car with an MT ecu in it, and then dyno it with an AT ecu in it, you'll find that the AT ecu's make slightly more power
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