to unlock the tests you go into the test mode, click until you come to test 19, it will flip between lock/unlock, you press the knob and then press it until you see 15, then you press the left knob, it should unlock your particular cluster (LV22335 = 2+2+3+3+5=15)... then you will have the other functions open... don't kill your battery in the process, lol...