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Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Outlook, 2009 GMC Acadia, 2009 Chevrolet Traverse, and 2009 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify DTC P0450, P0451, P0452, P0453, P0458, P0459, P0497, P0498, or P0499, is not set.
  2. Disconnect the purge line from the EVAP purge valve.
  3. Ignition ON, observe the scan tool fuel tank pressure sensor parameter. The FTP sensor parameter should be 0 mm/Hg (0 in/H2O). If the pressure is not at 0 mm/Hg (0 in/H2O), verify the FTP sensor voltage is less than 4.7 V.
  4. Reconnect all previously disconnected EVAP hardware.
    5. NOTE: Refer to the J 41413-200  Evaporative Emissions System Tester (EEST) operation manual for detailed instructions. See Special Tools .
  5. 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  . See Special Tools .
  6. Ignition ON, seal the EVAP system with a scan tool.
  7. Turn the nitrogen/smoke valve on the J 41413-200  to nitrogen. See Special Tools .
    8. NOTE: DO NOT exceed the specified value in this step. Exceeding the specified value may produce incorrect test results.
  8. Use the remote switch to activate the J 41413-200  and pressurize the fuel tank with nitrogen to 9. See Special Tools .33 mm/Hg (5 in/H2O).
  9. Observe the scan tool FTP sensor parameter, command the EVAP vent valve OFF. Verify the FTP Sensor parameter is 0 mm/Hg (0 in/H2O).
    • If not the specified value, test for a blockage or a restriction in the EVAP vent hose or inlet. If the inlet or hose test normal, replace the EVAP vent solenoid valve.
  10. Operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that you observed in the Freeze Frame/Failure Records data.
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