Circuit Operation

5 volts are supplied to the power terminal of the fuel tank differential pressure sensor (terminal 3) from the ECM (terminal 81 - M/T) or PCM (terminal 46 - A/T). The ground terminal (terminal 2) is grounded with the ECM (terminal 92 - M/T) or PCM (terminal 57 - A/T).
A voltage proportional to the pressure in the fuel tank is sent from the output terminal of the fuel tank differential pressure sensor (terminal 1) to the ECM (terminal 61 - M/T) or PCM (terminal 92 - A/T).