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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 P0449, P0498, or P0499 >> Circuit/System Verification

Circuit/System Verification

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. Engine idling, command the EVAP vent solenoid ON and OFF with a scan tool while observing the following control circuit status parameters:
    • EVAP Vent Sol Short Gnd Test Status
    • EVAP Vent Sol Open Test Status
    • EVAP Vent Sol Short Volts Test Status

      Each parameter should display OK or Not Run.

  2. Ignition ON, command the EVAP Vent Solenoid ON and OFF with a scan tool. The EVAP Vent Solenoid should respond to the scan tool commands.
  3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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