How can I check if computer in my 97 cavalier 2.4l is working properly

SOURCE: 99 cavalier engine

I just changed a 2.4 in my 96. I pulled the whole thing because I coudn't get at the converter to flywheel bolts. After reading further, I saw information to pull the trans out through the drivers wheel well without the engine. They removed the starter to access the flywheel bolts to the converter.
I haven't tried it but it would make sense and it does make it a lot easier. Without the trans attached, you wouldn't need to remove the master cylinder or beat the sh-t out of the battery tray to get the think out.