Summit Wagon AWD L4-2350cc 2.4L SOHC (1995)
Barometric Pressure Sensor: Description and Operation
Barometric Pressure Sensor
PURPOSE
The Engine Control Module (ECM) uses the voltage signal to adjust the air-fuel ratio and ignition timing as altitude changes to improve
driveability at high altitude.
OPERATION
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The ECM supplies a 5 Volt reference and a ground to the sensor.
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As the resistance of the sensor changes the voltage across the sensor varies. This voltage is read as barometric pressure by the ECM.