On some vehicles, actuators can be tested with a scan tool by accessing output state control (OSC) or output test mode (OTM). In this mode, the actuator enabled or disabled, or the duty cycle increased or decreased.

Question

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Scan tools can communicate with a vehicle's onboard computer to test actuators by enabling or disabling them or adjusting their duty cycle through OSC or OTM.

On Some Vehicles, Actuators Can Be Tested with a Scan