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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1862 (Engine Controls And Fuel - 3.5L (L66) - DTC P0223 To DTC P0499) >> DTC P0451 or P0454 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. If DTC P0454 is set, inspect for an intermittent and for a poor connection at the FTP sensor.
  2. Ignition OFF, remove the fuel tank filler cap.
  3. Connect the GE-41415-50  to the fuel fill pipe. Connect the J 41413-200  to the J 41415-40  . Install the fuel tank filler cap to the GE-41415-50  .
  4. Ignition ON, engine OFF, seal the EVAP system with a scan tool.
    5. IMPORTANT: DO NOT exceed the specified value in this step. Exceeding the specified value may produce incorrect test results.
  5. Turn the nitrogen/smoke valve on the J 41413-200  to nitrogen. Use the remote switch to pressurize the fuel tank with nitrogen to 10 inch H20.
  6. Compare the scan tool FTP sensor parameter to the J 41413-200  pressure/vacuum gage. The scan tool FTP sensor parameter should be within 1 inch H20 of the pressure/vacuum gage.
    • If not within the specified range, replace the FTP sensor.
  7. With a scan tool command the vent solenoid valve OPEN. The scan tool FTP sensor parameter should read 0 inch H20.
    • If not within the specified range, replace the FTP sensor.
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