What is the differance between the 2???

 

Interlock switch gets pressed when the clutch is fully depressed and is interlocked with the starter motor. Clutch pedal position switch gets pressed when you release the clutch. One thing I believe this switch controls is the "vehicle not moving/clutch depressed rev limiter" for launch control. With the clutch out the rev limiter is higher, with it pressed in and vehicle not moving, the limiter is lowered to 5k I believe. Unless, of course, you have a custom tune and they changed the rev limiters.

These switches are most likely tied to some other controls but I believe these are the two main things.

 

Thank you very much