Circuit/System Testing
- If DTC P0454 is set Inspect for an intermittent and for a poor connection at the FTP sensor and the engine control module (ECM).
- Remove the fuel fill cap. Connect the GE-41415-50 to the fuel tank filler neck. Connect the J 41413-200 to the GE-41415-50 .
- Disconnect the EVAP vent line from the vent solenoid, and seal it, using the correct plug from the J 41413-300 .
- Pressurize the EVAP system with nitrogen to 5 inches H2O. Compare the Fuel Tank Pressure Sensor parameter with a scan tool to the J 41413-200
pressure/vacuum gage. The scan tool FTP sensor parameter should be within 1 inch H2O of the pressure/vacuum gage.
- If the FTP sensor parameter is not within 1 inch H2O of the pressure/vacuum gage, replace the FTP sensor.
- Command the purge solenoid valve OPEN with a scan tool.
- If the FTP sensor parameter is not 0 inch H2O, replace the FTP sensor.
IMPORTANT:
The EVAP vent solenoid valve will not remain closed when commanded ON with positive pressure applied to the EVAP system.