Fuel Tank Pressure Release Valve

Battery voltage and ground is applied to connector terminals.
With VACUUM applied to port A
Below 0.98 kPa (0.29 in Hg) Airflow

Battery voltage and ground is applied to connector terminals.
With PRESSURE applied to port A
Below 1.96 kPa (0.06 in Hg) NO Airflow
Above 5.9 kPa (1.7 in Hg) Airflow