Skylark L4-144 2.4L DOHC VIN T SFI (1997)
FUEL TANK PRESSURE SENSOR
The Fuel Tank Pressure Sensor is mounted on top of the modular fuel sender. The sensor measures the difference between the fuel vapor pressure
(or vacuum) in the fuel tank and the outside air pressure. A three wire electrical harness connects it to the PCM. The PCM supplies a 5 volt
reference signal and ground to the sensor. The sensor will return a voltage between 0.1 volts and 4.9 volts back to the PCM depending on the fuel
vapor pressure in the fuel tank. When the fuel pressure in the fuel tank is equal to the outside air pressure, such as when the fuel cap is removed,
the output voltage will be 1.3 volts to 1.7 volts.