Air Temp Sensor Function

Functions of an iat sensor. A mass air flow sensor maf is a sensor used to determine the mass flow rate of air entering a fuel injected internal combustion engine. The intake air temperature sensor is commonly integrated with the mass air flow maf sensor and is found in the air intake passage below the hood.

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An intake air temperature sensor is an essential component of an engine which ensures that the vehicle starts smoothly and that the fuel to air ratio is maintained at appropriate levels for effective combustion of the fuel when the engine is cold.

Air temp sensor function.

The air charge temperature sensor sends data to the computer which allows it to make continuous adjustments to the engine s air fuel mixture for maximum fuel efficiency. The air mass information is necessary for the engine control unit ecu to balance and deliver the correct fuel mass to the engine. The sensor is usually located behind the grill or front bumper. Ambient temperature sensor function can be scanned with a scan tool or a multimeter.

Any problems with the sensor can result in incorrect calculations by the ecu which may result in a decrease in fuel efficiency. As the ambient temperature sensor plays a direct role in the automated function of the ac system when it is having a problem this may interfere with the system s ability to cool the vehicle. The ambient air temperature sensor symptoms include no ac clutch compressor operation. This is because the sensor may be preventing clutch operation because it is disconnected.

The intake air temperature sensor or iat sensor has the core function of monitoring the temperature of the air that is entering the engine of your vehicle. Intake air temperature sensors iat november 2012. To operate as efficiently as possible car engines rely on the ecu a small computer to monitor and adjust various components and processes as conditions change. Air changes its density with temperature and pressure.

In automotive applications air density varies with the ambient. What is an ambient temperature sensor. The air charge temperature sensor plays an. This is a resistance based sensor which correlates the temperature of the incoming air with the magnitude of resistance and relays this information to the car computer.

The intake air temperature sensor measures the temperature of the air entering a car s engine through the intake manifold and relays the information to the engine control unit. If the ambient temperature sensor fails or is sending out an inconsistent signal then the ac system may have trouble maintaining cool and comfortable. Iat function the intake air temperature sensor iat has been utilised as an engine control unit ecu input signal from the very first efi systems to the currently used systems as a requirement for calculating the air mass volume for the incoming air charge. This information is very useful for the engine control unit or ecu for many functions and calculations such as calculating the air density for effective ignition timing and fuel efficiency.