Turnig off the ignition switch can turn of the relay coil?

Yes, turning off the ignition switch typically deactivates the relay coil in automotive systems. This action interrupts the electrical circuit that powers the relay, causing it to disengage and stop supplying power to connected components. As a result, systems reliant on the relay, such as fuel pumps or ignition systems, will also turn off, preventing any electrical operation when the vehicle is not in use.