Car Sensors

What is the primary function of a sensor in an automotive system?

• To generate power for the vehicle's electrical system.

• To convert a physical stimulus into an electrical signal.

• To store data for the vehicle's computer.

• To control the vehicle's actuators directly.

Which statement accurately describes the relationship between sensors and inputs in an automotive system?

• All inputs are sensors.

• All sensors are inputs.

• Sensors and inputs are the same thing.

• Neither sensors nor inputs are connected to the PCM.

Which statement is true about sensor signals in automotive systems?

• All sensors output exactly the same voltage always

• Sensor signals are irrelevant to the ECU

• Sensors send varying signals (voltage, resistance, frequency) depending on conditions

• Sensors only work when the car is stationary

What type of resistor is commonly used in automotive temperature sensors, and how does its resistance typically change with temperature?

• Potentiometer; resistance increases with temperature.

• Thermistor; resistance decreases with increasing temperature.

• Photoresistor; resistance decreases with increasing temperature.

• Thermistor; resistance increases with increasing temperature.

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Which characteristic is true for an Air Temperature Sensor (ATS)?

• It is typically a one-wire sensor that sends a signal to a dashboard gauge.

• It is always a two-wire sensor that reports directly to the PCM.

• It measures coolant temperature in the engine block.

• It is a PTC thermistor used for circuit protection.

Which sensor helps the engine management system measure engine temperature?

• Knock sensor

• Ambient air temperature sensor

• Engine coolant temperature sensor

• Fuel temperature sensor