Airflow Sensor

Airflow sensor is located inside air cleaner assembly. Intake air temperature sensor and barometric pressure sensor are built-into airflow sensor. The airflow sensor senses intake air volume and sends a signal to the Electronic Control Unit (ECU). Using airflow sensor and engine RPM signal, ECU makes computations to determine basic fuel injection timing.

Air temperature sensor signals ECU. Based on air temperature signal, ECU corrects amount of fuel to be injected.

Barometric pressure sensor senses barometric pressure and converts it to electrical voltage signals. Voltage signals are sent to ECU. Based on barometric pressure signal, ECU calculates vehicle altitude and corrects fuel injection quantity and timing for optimum air/fuel ratio. This ensures improved driveability at high altitudes.