you can't disable or enable it. it's not so much launch control as a limiter to keep you from destroying your car and mitsu having to pay for it.

to engage it, stop, put the car in 1st gear and floor the gas pedal...below are instructions on how to launch

Launching is simple.

Step 1: Stop

Step 2: Push in the clutch

Step 3: Put the car in first gear

Step 4: Let the clutch out to find where it engages and hold it just before that (it'll make it easier to slip/dump)

Step 5: Floor the gas, and hold it to the floor. You will start bouncing off the 2-step at 5000rpm and build around 10psi.

Step 6: DO NOT let off the gas pedal at ALL, slip out the clutch until you feel it grab, then let go.

Step 7: DO NOT let off of the gas pedal until you shift to 2nd gear. The gas pedal should be held to the floor from the beginning until you shift to 2nd.

Step 8: Continue shifting gears accordingly.

that's how i've always done it, and it was good enough to get me and my basically stock IX MR to 12.82 @ 107.41 with only a cat back, no tune, no other power adders, a boost leak, and a possibly slipping stock clutch.