The device that sends information to a control module is the?

The device that sends information to a control module is the?

• A. Actuator
• B. Relay
• C. Sensor
• D. Switch

Answer: (C)

Sensors provide input to the control module by measuring a physical condition and converting it into an electrical signal the module can read. This input lets the module understand the current state of the system and decide what actions to take. For example, a coolant temperature sensor tells the ECU how hot the engine is, while oxygen, MAP/MAF, and wheel-speed sensors feed various measured values to the module so it can adjust fuel, timing, and other parameters. An actuator, on the other hand, is what the control module drives to produce a physical action, such as opening a valve or moving a throttle. A relay is a controlled switch used to power circuits, not to provide measurement data. A switch simply opens or closes a circuit and does not feed information to the module.

Sensors provide input to the control module by measuring a physical condition and converting it into an electrical signal the module can read. This input lets the module understand the current state of the system and decide what actions to take. For example, a coolant temperature sensor tells the ECU how hot the engine is, while oxygen, MAP/MAF, and wheel-speed sensors feed various measured values to the module so it can adjust fuel, timing, and other parameters.

An actuator, on the other hand, is what the control module drives to produce a physical action, such as opening a valve or moving a throttle. A relay is a controlled switch used to power circuits, not to provide measurement data. A switch simply opens or closes a circuit and does not feed information to the module.