Most computer-controlled (1)__________ are ground-controlled circuits. The PCM (2)__________ the actuator by providing the ground. On an (3)__________ trace, the on-time pulse is the (4)__________ pulse. On positive-feed circuits, where the (5)__________ is supplying the voltage to turn a circuit on, the on-time (6)__________ is the upward pulse. One complete cycle is

(7)__________ from one on-time pulse to the (8)__________ of the next on-time pulse.

To (9)__________ an actuator, you need to know what it (10)__________ is. Most actuators are (11)__________. The computer controls the (12)__________ of the solenoid by controlling the pulse (13)__________ of the control signal. You can see the (14)__________ on and off of the solenoid by (15)__________ the control signal. The voltage (16)__________ are caused by the discharge of the coil in the solenoid. Some actuators are controlled pulse-width (17)__________ signals. These signals show a changing pulse width. These (18)__________ are controlled by varying the pulse width, signal (19)__________, and voltage levels.

Both (20)__________ should be checked for amplitude, time, and (21)__________. You should also (22)__________ changes to the pulse width as operating (23)__________ change. A (24)__________ waveform will have (25)__________, glitches, or rounded corners. You should be able to see (26)__________ that the actuator immediately turns (27)__________ and on according to the commands of the computer.