u turn ur key on, but dont start it, press the lock/unlock buttons down and hold them until ur horn beeps. start at the LF tire. if u dont have the tool (which u probably dont) deflate the tire until the horn chirps, pump back up to 32psi an dmove to RF, then RR, then LR when u get to the LR, it'll chirp twice. has to be done within 5 minutes i believe, could be 15min tho. then u turn it off then turn it back on.