Ecotec Computers

[cobalt123]

The following is a list of the different computers used in different Ecotec installations. Pin out diagrams that I could find are lower in the thread.

Notes:
"PCM" Powertrain controller, which can operate an engine and transmission. Computer starts with a "P"
"ECM" Engine controller only. Computer starts with an "E"
"TCM" Transmission controller. Only in vehicles with an automatic transmission. The device is a slave to the ECM. In manual transmission car, the TCM is not installed.

J-bodies:
2002-2005 L61 equipped cars:
PCM: P11

Deltas:
2003-2006 L61 Ions
2005-2006 L61 Cobalts
ECM: E16A
TCM: T42

2007-current model L61 Cobalts, Ions, G5's
ECM: E37
TCM: T42

2004-2006 model LSJ Ions
2005-2007 model LSJ Cobalts
PCM: P12
Note: The P12 unit could in fact operate a transmission in this application. It is simply not used. However, somebody using HP Tuners on this computer will find variables for it on the 2005-06 cars. In 2007, they removed those variables.

2006-current model LE5 Cobalt, G5's
ECM: E67
TCM: T42

2006-current model LE5 Sky, Solstice
ECM: E67
TCM: ? (5L40E trans)

LNF Cars:
Sky Redline
ECM: E69