Quote Originally Posted by shack View Post
The engine ECU for automatics doesn't have the ability to communicate with the clutch switch on a manual.

The engine ECU for manuals doesn't have the ability to communicate with the auto.

Circuitry is missing from both that would make them compatible.
This is why Toyota won the war. They would never be that stupid. 40 years ago they made combination switches that looked identical but weren't. No way they'd do that today. Even the Italians have worked it out.