Mirage L4-1597cc 1.6L DOHC Turbo (1989)
Barometric Pressure Switch: Description and Operation
Barometric Sensor
The Barometric Pressure Sensor installed on the Air Flow Sensor (AFS) senses the atmospheric pressure and converts it into a voltage signal which is
sent to the ECU. The ECU uses this signal to compute the altitude at which the vehicle is running, accordingly correcting the air-fuel ratio and the
ignition timing, thus improving driveability at high altitude.