Barometric Pressure Sensor: Description and Operation

PURPOSE
The barometric pressure sensor converts the barometric pressure into a voltage and inputs it to the engine control module, which then corrects the fuel injection rate, etc. based on the input signal.





OPERATION
The 5V power in the engine control module is supplied to the barometric pressure sensor. It flows through the circuit in the sensor and is then grounded in the engine control module.

The barometric pressure sensor output voltage which is proportional to the barometric pressure (absolute pressure) is supplied to the engine control module.