IR Sensor questions

[Jedi Padawan]

OK my team is looking into assembling and possibly using them but first and foremost I can't seem to find the schematics to the IR sensors or the Current sensors. Where might these be located. And secondly a kind of programming question, what does FIRST's standard default on the IR sensors tell the robot to do?? (if you can diagram it it would be helpful). I ask this b/c it's the difference between line following and the sensor that we want to measure (as to how fast each is) if any team has completed trials of this and would like to post results they would be most appreciated. Thank You