Prizm L4-108 1.8L DOHC VIN 8 MFI (1998)
Fuel Tank Pressure Sensor: Description and Operation
EVAP Pressure Switching Solenoid
EVAP Pressure Switching Solenoid
The EVAP pressure switching solenoid is controlled by the PCM. The EVAP pressure switching solenoid determines which vapor pressures the fuel tank
pressure sensor monitors. The EVAP pressure switching solenoid supplies vapor pressure to the fuel tank pressure sensor through the inboard port (2) of
the solenoid. The outboard port (1) receives vapor pressure from the fuel tank side of the EVAP system, while the single port (3) receives pressure from
the canister and purge side of the EVAP system.
