Hi Everyone,
I've just replaced my Transmission Control Module (T42) and now when I try and connect I get Detect Protocol Failed error. The original module when I hook it back up works fine. I get the same error whether the new TCM is connected or if it is unplugged.

Car is a 2006 Holden Commodore L76 with E38 ECM.

I've read stories about when you replace certain modules that this can happen and requires re linking with a Tech 2 or Alternative Scan Tool. Do you agree this is normal behavior or should I at least be able to connect? I also get plenty of errors on key on, fuel gauge does not work, etc.