Which of the following is a common type of output signal from a vehicle computer?

A vehicle computer, often referred to as an Engine Control Module (ECM) or Electronic Control Unit (ECU), can generate multiple types of output signals to manage and control various functions within the vehicle.

Understanding each of these output signals is key. Voltage levels are widely used in automotive systems to actuate components like relays and sensors. They represent the electrical potential that can engage these components, allowing the vehicle's systems to function as intended.

Current flow is another output signal that may be used by the vehicle computer to monitor or control electrical systems. For example, it can be used to determine if a motor is operating correctly by measuring the amount of current flowing through it.

Grounding signals are also common. The computer can pull a pin low to ground to activate devices like solenoids or warning indicators. This method effectively completes the circuit for the device being controlled.

Since the vehicle computer utilizes all three types of outputs—voltage levels, current flow, and grounding signals—it makes sense that the correct answer encompasses all of these, demonstrating the various ways a vehicle's electrical systems can be controlled and monitored by the onboard computer.