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Home >> Chevrolet >> 2010 >> Traverse LS, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 70 (Engine Control System & Fuel System - 3.6L - DTC P0192 To DTC P0629) >> DTC P0455 or P0497 >> Circuit/System Testing >> Blockage/Restriction Testing

Blockage/Restriction 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. Connect the GE-41415-50  to the fuel tank filler neck. Connect the J 41413-200  to the GE-41415-50  . See Special Tools .
  2. Seal the EVAP system using the EVAP Purge/Seal function with a scan tool.
  3. Pressurize the EVAP system with nitrogen to 9.33 mm/Hg (5 in/H2O). Compare the scan tool Fuel Tank Pressure Sensor parameter to the J 41413-200  pressure/vacuum gage. See Special Tools . The FTP sensor parameter should be within 1.86 mm/Hg (1 in/H2O) of the pressure/vacuum gage.
    • If not within the specified range, replace the FTP sensor.
  4. Command the EVAP purge solenoid to 100 percent with a scan tool. The scan tool FTP sensor parameter should drop to less than 1.86 mm/Hg (1 in/H2O).
    • If greater than the specified value, disconnect the EVAP pipes listed below one at a time while observing the scan tool FTP sensor parameter. If the FTP sensor parameter drops to less than the specified when a pipe is disconnected, repair the blockage or restriction in one of the following EVAP pipe/hoses:
      • EVAP purge vacuum source from the EVAP purge solenoid
      • EVAP purge pipe from the EVAP purge solenoid
      • EVAP purge pipe at the EVAP canister
      • EVAP vapor pipe at the EVAP canister
  5. If a condition with the EVAP system cannot be located, refer to Diagnostic Aids for additional information.
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