Hopefully You still have those connectors apart so you can measure the MCOR itself.
You need to measure the MCOR resistance from Pedal Up to Pedal Down.
Move the pedal slowly and make sure the resistance change is smooth and not "jumpy".
Record
both values (Pedal Up and Pedal Down).
You can either measure directly at the MCOR pins that correspond to:
White to Yellow
or
Plug the MCOR 3-pin connector and measure from the disconnected controller 16-pin connector:
Pin #1 to Pin #2