For most actuators, the circuit driver in the PCM applies a ground to the circuit to turn the actuator on and removes the ground to turn the actuator off.

Question

Quizplus · Accepted Answer

In many automotive and industrial applications, actuators are controlled by the Powertrain Control Module (PCM) or similar control units. These actuators often operate on a principle where the PCM applies a ground to the circuit to activate or turn on the actuator, and removes the ground to deactivate or turn it off. This method is widely used because it allows for simpler wiring and safer control of high-current devices by switching the ground side of the circuit.

For Most Actuators, the Circuit Driver in the PCM Applies