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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1991 (Engine Controls And Fuel - 3.6L (LCS) - DTC P0192 To DTC P0629) >> DTC P0446 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, open the hood to disable the Auto-Stop function.
  2. Ignition ON, verify the scan tool hood position parameter displays Open.
    • If the hood position does not display Open, refer to DTC P254F .
    3. NOTE: Refer to the J 41413-200  Evaporative Emissions System Tester (EEST) operation manual for detailed instructions.
  3. Remove the fuel fill cap and connect the GE-41415-50  to the fuel tank filler neck. Connect the J 41413-200  to the GE-41415-50  .
  4. Ignition ON, seal the EVAP system with a scan tool.
  5. Turn the nitrogen/smoke valve on the J 41413-200  to nitrogen.
    6. NOTE: DO NOT exceed the specified value in this step. Exceeding the specified value may produce incorrect test results.
  6. Use the remote switch to activate the J 41413-200  and pressurize the fuel tank with nitrogen to 5 inches H20.
  7. Observe the scan tool FTP sensor parameter, command the EVAP vent valve OFF. Verify the FTP Sensor parameter is 0 inches H2O.
    • If not the specified value, test for a blockage or a restriction in the EVAP vent hose or inlet. If the components test normal, replace the EVAP vent solenoid valve.
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